diff --git a/Dockerfiles/agent/README.md b/Dockerfiles/agent/README.md
index 5b66c0bb2..5f3e2da96 100644
--- a/Dockerfiles/agent/README.md
+++ b/Dockerfiles/agent/README.md
@@ -151,13 +151,18 @@ ZBX_UNSAFEUSERPARAMETERS=0
 ZBX_TLSCONNECT=unencrypted
 ZBX_TLSACCEPT=unencrypted
 ZBX_TLSCAFILE=
+ZBX_TLSCA=
 ZBX_TLSCRLFILE=
+ZBX_TLSCRL=
 ZBX_TLSSERVERCERTISSUER=
 ZBX_TLSSERVERCERTSUBJECT=
 ZBX_TLSCERTFILE=
+ZBX_TLSCERT=
 ZBX_TLSKEYFILE=
+ZBX_TLSKEY=
 ZBX_TLSPSKIDENTITY=
 ZBX_TLSPSKFILE=
+ZBX_TLSPSK=
 ZBX_TLSCIPHERALL= # Available since 4.4.7
 ZBX_TLSCIPHERALL13= # Available since 4.4.7
 ZBX_TLSCIPHERCERT= # Available since 4.4.7
@@ -186,7 +191,7 @@ The volume allows load additional modules and extend Zabbix agent using ``LoadMo
 
 ### ``/var/lib/zabbix/enc``
 
-The volume is used to store TLS related files. These file names are specified using ``ZBX_TLSCAFILE``, ``ZBX_TLSCRLFILE``, ``ZBX_TLSKEY_FILE`` and ``ZBX_TLSPSKFILE`` variables.
+The volume is used to store TLS related files. These file names are specified using ``ZBX_TLSCAFILE``, ``ZBX_TLSCRLFILE``, ``ZBX_TLSCERTFILE``, ``ZBX_TLSKEYFILE`` and ``ZBX_TLSPSKFILE`` variables. Additionally it is possible to use environment variables ``ZBX_TLSCA``, ``ZBX_TLSCRL``, ``ZBX_TLSCERT``, ``ZBX_TLSKEY`` and ``ZBX_TLSPSK`` with plaintext values.
 
 # The image variants
 
diff --git a/Dockerfiles/agent/alpine/Dockerfile b/Dockerfiles/agent/alpine/Dockerfile
index 1f2fe3a7e..ae6bb12c1 100644
--- a/Dockerfiles/agent/alpine/Dockerfile
+++ b/Dockerfiles/agent/alpine/Dockerfile
@@ -63,6 +63,7 @@ RUN set -eux && \
     mkdir -p /etc/zabbix/zabbix_agentd.d && \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /var/lib/zabbix/modules && \
     chown --quiet -R zabbix:root /etc/zabbix/ /var/lib/zabbix/ && \
     chgrp -R 0 /etc/zabbix/ /var/lib/zabbix/ && \
diff --git a/Dockerfiles/agent/alpine/docker-entrypoint.sh b/Dockerfiles/agent/alpine/docker-entrypoint.sh
index 192efda4f..c888baf51 100755
--- a/Dockerfiles/agent/alpine/docker-entrypoint.sh
+++ b/Dockerfiles/agent/alpine/docker-entrypoint.sh
@@ -20,6 +20,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 escape_spec_char() {
     local var_value=$1
@@ -112,6 +114,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 prepare_zbx_agent_config() {
     echo "** Preparing Zabbix agent configuration file"
     ZBX_AGENT_CONFIG=$ZABBIX_ETC_DIR/zabbix_agentd.conf
@@ -177,20 +192,20 @@ prepare_zbx_agent_config() {
     update_config_multiple_var $ZBX_AGENT_CONFIG "LoadModule" "${ZBX_LOADMODULE}"
     update_config_var $ZBX_AGENT_CONFIG "TLSConnect" "${ZBX_TLSCONNECT}"
     update_config_var $ZBX_AGENT_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
     update_config_var $ZBX_AGENT_CONFIG "TLSServerCertIssuer" "${ZBX_TLSSERVERCERTISSUER}"
     update_config_var $ZBX_AGENT_CONFIG "TLSServerCertSubject" "${ZBX_TLSSERVERCERTSUBJECT}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
     update_config_var $ZBX_AGENT_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}" "${ZBX_TLSPSK}"
 
     update_config_multiple_var $ZBX_AGENT_CONFIG "DenyKey" "${ZBX_DENYKEY}"
     update_config_multiple_var $ZBX_AGENT_CONFIG "AllowKey" "${ZBX_ALLOWKEY}"
diff --git a/Dockerfiles/agent/centos/Dockerfile b/Dockerfiles/agent/centos/Dockerfile
index f2f8dc48a..b228bd06b 100644
--- a/Dockerfiles/agent/centos/Dockerfile
+++ b/Dockerfiles/agent/centos/Dockerfile
@@ -79,6 +79,7 @@ RUN --mount=type=tmpfs,target=/var/lib/dnf/ \
     mkdir -p /etc/zabbix/zabbix_agentd.d && \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /var/lib/zabbix/modules && \
     chown --quiet -R zabbix:root /etc/zabbix/ /var/lib/zabbix/ && \
     chgrp -R 0 /etc/zabbix/ /var/lib/zabbix/ && \
diff --git a/Dockerfiles/agent/centos/docker-entrypoint.sh b/Dockerfiles/agent/centos/docker-entrypoint.sh
index 192efda4f..c888baf51 100755
--- a/Dockerfiles/agent/centos/docker-entrypoint.sh
+++ b/Dockerfiles/agent/centos/docker-entrypoint.sh
@@ -20,6 +20,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 escape_spec_char() {
     local var_value=$1
@@ -112,6 +114,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 prepare_zbx_agent_config() {
     echo "** Preparing Zabbix agent configuration file"
     ZBX_AGENT_CONFIG=$ZABBIX_ETC_DIR/zabbix_agentd.conf
@@ -177,20 +192,20 @@ prepare_zbx_agent_config() {
     update_config_multiple_var $ZBX_AGENT_CONFIG "LoadModule" "${ZBX_LOADMODULE}"
     update_config_var $ZBX_AGENT_CONFIG "TLSConnect" "${ZBX_TLSCONNECT}"
     update_config_var $ZBX_AGENT_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
     update_config_var $ZBX_AGENT_CONFIG "TLSServerCertIssuer" "${ZBX_TLSSERVERCERTISSUER}"
     update_config_var $ZBX_AGENT_CONFIG "TLSServerCertSubject" "${ZBX_TLSSERVERCERTSUBJECT}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
     update_config_var $ZBX_AGENT_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}" "${ZBX_TLSPSK}"
 
     update_config_multiple_var $ZBX_AGENT_CONFIG "DenyKey" "${ZBX_DENYKEY}"
     update_config_multiple_var $ZBX_AGENT_CONFIG "AllowKey" "${ZBX_ALLOWKEY}"
diff --git a/Dockerfiles/agent/ol/Dockerfile b/Dockerfiles/agent/ol/Dockerfile
index 18bd99850..5ab1b10e9 100644
--- a/Dockerfiles/agent/ol/Dockerfile
+++ b/Dockerfiles/agent/ol/Dockerfile
@@ -67,6 +67,7 @@ RUN --mount=type=tmpfs,target=/var/lib/dnf/ \
     mkdir -p /etc/zabbix/zabbix_agentd.d && \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /var/lib/zabbix/modules && \
     chown --quiet -R zabbix:root /etc/zabbix/ /var/lib/zabbix/ && \
     chgrp -R 0 /etc/zabbix/ /var/lib/zabbix/ && \
diff --git a/Dockerfiles/agent/ol/docker-entrypoint.sh b/Dockerfiles/agent/ol/docker-entrypoint.sh
index 192efda4f..c888baf51 100755
--- a/Dockerfiles/agent/ol/docker-entrypoint.sh
+++ b/Dockerfiles/agent/ol/docker-entrypoint.sh
@@ -20,6 +20,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 escape_spec_char() {
     local var_value=$1
@@ -112,6 +114,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 prepare_zbx_agent_config() {
     echo "** Preparing Zabbix agent configuration file"
     ZBX_AGENT_CONFIG=$ZABBIX_ETC_DIR/zabbix_agentd.conf
@@ -177,20 +192,20 @@ prepare_zbx_agent_config() {
     update_config_multiple_var $ZBX_AGENT_CONFIG "LoadModule" "${ZBX_LOADMODULE}"
     update_config_var $ZBX_AGENT_CONFIG "TLSConnect" "${ZBX_TLSCONNECT}"
     update_config_var $ZBX_AGENT_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
     update_config_var $ZBX_AGENT_CONFIG "TLSServerCertIssuer" "${ZBX_TLSSERVERCERTISSUER}"
     update_config_var $ZBX_AGENT_CONFIG "TLSServerCertSubject" "${ZBX_TLSSERVERCERTSUBJECT}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
     update_config_var $ZBX_AGENT_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}" "${ZBX_TLSPSK}"
 
     update_config_multiple_var $ZBX_AGENT_CONFIG "DenyKey" "${ZBX_DENYKEY}"
     update_config_multiple_var $ZBX_AGENT_CONFIG "AllowKey" "${ZBX_ALLOWKEY}"
diff --git a/Dockerfiles/agent/rhel/Dockerfile b/Dockerfiles/agent/rhel/Dockerfile
index 51c57c50d..79514654e 100644
--- a/Dockerfiles/agent/rhel/Dockerfile
+++ b/Dockerfiles/agent/rhel/Dockerfile
@@ -105,6 +105,7 @@ RUN --mount=type=tmpfs,target=/var/lib/dnf/ \
     mkdir -p /etc/zabbix/zabbix_agentd.d && \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /var/lib/zabbix/modules && \
     chown --quiet -R zabbix:root /etc/zabbix/ /var/lib/zabbix/ && \
     chgrp -R 0 /etc/zabbix/ /var/lib/zabbix/ && \
diff --git a/Dockerfiles/agent/rhel/docker-entrypoint.sh b/Dockerfiles/agent/rhel/docker-entrypoint.sh
index 192efda4f..c888baf51 100755
--- a/Dockerfiles/agent/rhel/docker-entrypoint.sh
+++ b/Dockerfiles/agent/rhel/docker-entrypoint.sh
@@ -20,6 +20,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 escape_spec_char() {
     local var_value=$1
@@ -112,6 +114,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 prepare_zbx_agent_config() {
     echo "** Preparing Zabbix agent configuration file"
     ZBX_AGENT_CONFIG=$ZABBIX_ETC_DIR/zabbix_agentd.conf
@@ -177,20 +192,20 @@ prepare_zbx_agent_config() {
     update_config_multiple_var $ZBX_AGENT_CONFIG "LoadModule" "${ZBX_LOADMODULE}"
     update_config_var $ZBX_AGENT_CONFIG "TLSConnect" "${ZBX_TLSCONNECT}"
     update_config_var $ZBX_AGENT_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
     update_config_var $ZBX_AGENT_CONFIG "TLSServerCertIssuer" "${ZBX_TLSSERVERCERTISSUER}"
     update_config_var $ZBX_AGENT_CONFIG "TLSServerCertSubject" "${ZBX_TLSSERVERCERTSUBJECT}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
     update_config_var $ZBX_AGENT_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}" "${ZBX_TLSPSK}"
 
     update_config_multiple_var $ZBX_AGENT_CONFIG "DenyKey" "${ZBX_DENYKEY}"
     update_config_multiple_var $ZBX_AGENT_CONFIG "AllowKey" "${ZBX_ALLOWKEY}"
diff --git a/Dockerfiles/agent/ubuntu/Dockerfile b/Dockerfiles/agent/ubuntu/Dockerfile
index 795011f16..a7983c668 100644
--- a/Dockerfiles/agent/ubuntu/Dockerfile
+++ b/Dockerfiles/agent/ubuntu/Dockerfile
@@ -63,6 +63,7 @@ RUN --mount=type=cache,target=/var/lib/apt/,sharing=locked \
     mkdir -p /etc/zabbix/zabbix_agentd.d && \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /var/lib/zabbix/modules && \
     chown --quiet -R zabbix:root /etc/zabbix/ /var/lib/zabbix/ && \
     chgrp -R 0 /etc/zabbix/ /var/lib/zabbix/ && \
diff --git a/Dockerfiles/agent/ubuntu/docker-entrypoint.sh b/Dockerfiles/agent/ubuntu/docker-entrypoint.sh
index 192efda4f..c888baf51 100755
--- a/Dockerfiles/agent/ubuntu/docker-entrypoint.sh
+++ b/Dockerfiles/agent/ubuntu/docker-entrypoint.sh
@@ -20,6 +20,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 escape_spec_char() {
     local var_value=$1
@@ -112,6 +114,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 prepare_zbx_agent_config() {
     echo "** Preparing Zabbix agent configuration file"
     ZBX_AGENT_CONFIG=$ZABBIX_ETC_DIR/zabbix_agentd.conf
@@ -177,20 +192,20 @@ prepare_zbx_agent_config() {
     update_config_multiple_var $ZBX_AGENT_CONFIG "LoadModule" "${ZBX_LOADMODULE}"
     update_config_var $ZBX_AGENT_CONFIG "TLSConnect" "${ZBX_TLSCONNECT}"
     update_config_var $ZBX_AGENT_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
     update_config_var $ZBX_AGENT_CONFIG "TLSServerCertIssuer" "${ZBX_TLSSERVERCERTISSUER}"
     update_config_var $ZBX_AGENT_CONFIG "TLSServerCertSubject" "${ZBX_TLSSERVERCERTSUBJECT}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_AGENT_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
     update_config_var $ZBX_AGENT_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}" "${ZBX_TLSPSK}"
 
     update_config_multiple_var $ZBX_AGENT_CONFIG "DenyKey" "${ZBX_DENYKEY}"
     update_config_multiple_var $ZBX_AGENT_CONFIG "AllowKey" "${ZBX_ALLOWKEY}"
diff --git a/Dockerfiles/agent2/README.md b/Dockerfiles/agent2/README.md
index 3d6a58c52..aa19fc33f 100644
--- a/Dockerfiles/agent2/README.md
+++ b/Dockerfiles/agent2/README.md
@@ -147,13 +147,18 @@ ZBX_UNSAFEUSERPARAMETERS=0
 ZBX_TLSCONNECT=unencrypted
 ZBX_TLSACCEPT=unencrypted
 ZBX_TLSCAFILE=
+ZBX_TLSCA=
 ZBX_TLSCRLFILE=
+ZBX_TLSCRL=
 ZBX_TLSSERVERCERTISSUER=
 ZBX_TLSSERVERCERTSUBJECT=
 ZBX_TLSCERTFILE=
+ZBX_TLSCERT=
 ZBX_TLSKEYFILE=
+ZBX_TLSKEY=
 ZBX_TLSPSKIDENTITY=
 ZBX_TLSPSKFILE=
+ZBX_TLSPSK=
 ZBX_DENYKEY=system.run[*] # Available since 5.0.0
 ZBX_ALLOWKEY= # Available since 5.0.0
 ```
@@ -172,7 +177,7 @@ The volume allows include ``*.conf`` files and extend Zabbix agent 2 using ``Use
 
 ### ``/var/lib/zabbix/enc``
 
-The volume is used to store TLS related files. These file names are specified using ``ZBX_TLSCAFILE``, ``ZBX_TLSCRLFILE``, ``ZBX_TLSKEY_FILE`` and ``ZBX_TLSPSKFILE`` variables.
+The volume is used to store TLS related files. These file names are specified using ``ZBX_TLSCAFILE``, ``ZBX_TLSCRLFILE``, ``ZBX_TLSCERTFILE``, ``ZBX_TLSKEYFILE`` and ``ZBX_TLSPSKFILE`` variables. Additionally it is possible to use environment variables ``ZBX_TLSCA``, ``ZBX_TLSCRL``, ``ZBX_TLSCERT``, ``ZBX_TLSKEY`` and ``ZBX_TLSPSK`` with plaintext values.
 
 ### ``/var/lib/zabbix/buffer``
 
diff --git a/Dockerfiles/agent2/alpine/Dockerfile b/Dockerfiles/agent2/alpine/Dockerfile
index ae70e42ca..182b7ce6a 100644
--- a/Dockerfiles/agent2/alpine/Dockerfile
+++ b/Dockerfiles/agent2/alpine/Dockerfile
@@ -62,6 +62,7 @@ RUN set -eux && \
     mkdir -p /etc/zabbix/zabbix_agentd.d && \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /var/lib/zabbix/modules && \
     mkdir -p /var/lib/zabbix/buffer && \
     chown --quiet -R zabbix:root /etc/zabbix/ /var/lib/zabbix/ /usr/sbin/zabbix-agent2-plugin/ && \
diff --git a/Dockerfiles/agent2/alpine/docker-entrypoint.sh b/Dockerfiles/agent2/alpine/docker-entrypoint.sh
index a9e4bda60..0cd44d5d5 100755
--- a/Dockerfiles/agent2/alpine/docker-entrypoint.sh
+++ b/Dockerfiles/agent2/alpine/docker-entrypoint.sh
@@ -20,6 +20,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 escape_spec_char() {
     local var_value=$1
@@ -112,6 +114,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 prepare_zbx_agent_config() {
     echo "** Preparing Zabbix agent configuration file"
     ZBX_AGENT_CONFIG=$ZABBIX_ETC_DIR/zabbix_agent2.conf
@@ -185,14 +200,14 @@ prepare_zbx_agent_config() {
     update_config_var $ZBX_AGENT_CONFIG "UnsafeUserParameters" "${ZBX_UNSAFEUSERPARAMETERS}"
     update_config_var $ZBX_AGENT_CONFIG "TLSConnect" "${ZBX_TLSCONNECT}"
     update_config_var $ZBX_AGENT_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
     update_config_var $ZBX_AGENT_CONFIG "TLSServerCertIssuer" "${ZBX_TLSSERVERCERTISSUER}"
     update_config_var $ZBX_AGENT_CONFIG "TLSServerCertSubject" "${ZBX_TLSSERVERCERTSUBJECT}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
     update_config_var $ZBX_AGENT_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}" "${ZBX_TLSPSK}"
 
     update_config_multiple_var $ZBX_AGENT_CONFIG "DenyKey" "${ZBX_DENYKEY}"
     update_config_multiple_var $ZBX_AGENT_CONFIG "AllowKey" "${ZBX_ALLOWKEY}"
diff --git a/Dockerfiles/agent2/centos/Dockerfile b/Dockerfiles/agent2/centos/Dockerfile
index 0103786e7..fd5f7e8b4 100644
--- a/Dockerfiles/agent2/centos/Dockerfile
+++ b/Dockerfiles/agent2/centos/Dockerfile
@@ -81,6 +81,7 @@ RUN --mount=type=tmpfs,target=/var/lib/dnf/ \
     mkdir -p /etc/zabbix/zabbix_agentd.d && \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /var/lib/zabbix/modules && \
     mkdir -p /var/lib/zabbix/buffer && \
     chown --quiet -R zabbix:root /etc/zabbix/ /var/lib/zabbix/ /usr/sbin/zabbix-agent2-plugin/ && \
diff --git a/Dockerfiles/agent2/centos/docker-entrypoint.sh b/Dockerfiles/agent2/centos/docker-entrypoint.sh
index a9e4bda60..0cd44d5d5 100755
--- a/Dockerfiles/agent2/centos/docker-entrypoint.sh
+++ b/Dockerfiles/agent2/centos/docker-entrypoint.sh
@@ -20,6 +20,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 escape_spec_char() {
     local var_value=$1
@@ -112,6 +114,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 prepare_zbx_agent_config() {
     echo "** Preparing Zabbix agent configuration file"
     ZBX_AGENT_CONFIG=$ZABBIX_ETC_DIR/zabbix_agent2.conf
@@ -185,14 +200,14 @@ prepare_zbx_agent_config() {
     update_config_var $ZBX_AGENT_CONFIG "UnsafeUserParameters" "${ZBX_UNSAFEUSERPARAMETERS}"
     update_config_var $ZBX_AGENT_CONFIG "TLSConnect" "${ZBX_TLSCONNECT}"
     update_config_var $ZBX_AGENT_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
     update_config_var $ZBX_AGENT_CONFIG "TLSServerCertIssuer" "${ZBX_TLSSERVERCERTISSUER}"
     update_config_var $ZBX_AGENT_CONFIG "TLSServerCertSubject" "${ZBX_TLSSERVERCERTSUBJECT}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
     update_config_var $ZBX_AGENT_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}" "${ZBX_TLSPSK}"
 
     update_config_multiple_var $ZBX_AGENT_CONFIG "DenyKey" "${ZBX_DENYKEY}"
     update_config_multiple_var $ZBX_AGENT_CONFIG "AllowKey" "${ZBX_ALLOWKEY}"
diff --git a/Dockerfiles/agent2/ol/Dockerfile b/Dockerfiles/agent2/ol/Dockerfile
index 12c6c0754..f7936b0f4 100644
--- a/Dockerfiles/agent2/ol/Dockerfile
+++ b/Dockerfiles/agent2/ol/Dockerfile
@@ -68,6 +68,7 @@ RUN --mount=type=tmpfs,target=/var/lib/dnf/ \
     mkdir -p /etc/zabbix/zabbix_agentd.d && \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /var/lib/zabbix/modules && \
     mkdir -p /var/lib/zabbix/buffer && \
     chown --quiet -R zabbix:root /etc/zabbix/ /var/lib/zabbix/ /usr/sbin/zabbix-agent2-plugin/ && \
diff --git a/Dockerfiles/agent2/ol/docker-entrypoint.sh b/Dockerfiles/agent2/ol/docker-entrypoint.sh
index a9e4bda60..0cd44d5d5 100755
--- a/Dockerfiles/agent2/ol/docker-entrypoint.sh
+++ b/Dockerfiles/agent2/ol/docker-entrypoint.sh
@@ -20,6 +20,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 escape_spec_char() {
     local var_value=$1
@@ -112,6 +114,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 prepare_zbx_agent_config() {
     echo "** Preparing Zabbix agent configuration file"
     ZBX_AGENT_CONFIG=$ZABBIX_ETC_DIR/zabbix_agent2.conf
@@ -185,14 +200,14 @@ prepare_zbx_agent_config() {
     update_config_var $ZBX_AGENT_CONFIG "UnsafeUserParameters" "${ZBX_UNSAFEUSERPARAMETERS}"
     update_config_var $ZBX_AGENT_CONFIG "TLSConnect" "${ZBX_TLSCONNECT}"
     update_config_var $ZBX_AGENT_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
     update_config_var $ZBX_AGENT_CONFIG "TLSServerCertIssuer" "${ZBX_TLSSERVERCERTISSUER}"
     update_config_var $ZBX_AGENT_CONFIG "TLSServerCertSubject" "${ZBX_TLSSERVERCERTSUBJECT}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
     update_config_var $ZBX_AGENT_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}" "${ZBX_TLSPSK}"
 
     update_config_multiple_var $ZBX_AGENT_CONFIG "DenyKey" "${ZBX_DENYKEY}"
     update_config_multiple_var $ZBX_AGENT_CONFIG "AllowKey" "${ZBX_ALLOWKEY}"
diff --git a/Dockerfiles/agent2/rhel/Dockerfile b/Dockerfiles/agent2/rhel/Dockerfile
index fe774e702..b35d5047b 100644
--- a/Dockerfiles/agent2/rhel/Dockerfile
+++ b/Dockerfiles/agent2/rhel/Dockerfile
@@ -106,6 +106,7 @@ RUN --mount=type=tmpfs,target=/var/lib/dnf/ \
     mkdir -p /etc/zabbix/zabbix_agentd.d && \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /var/lib/zabbix/modules && \
     mkdir -p /var/lib/zabbix/buffer && \
     chown --quiet -R zabbix:root /etc/zabbix/ /var/lib/zabbix/ /usr/sbin/zabbix-agent2-plugin/ && \
diff --git a/Dockerfiles/agent2/rhel/docker-entrypoint.sh b/Dockerfiles/agent2/rhel/docker-entrypoint.sh
index a9e4bda60..0cd44d5d5 100755
--- a/Dockerfiles/agent2/rhel/docker-entrypoint.sh
+++ b/Dockerfiles/agent2/rhel/docker-entrypoint.sh
@@ -20,6 +20,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 escape_spec_char() {
     local var_value=$1
@@ -112,6 +114,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 prepare_zbx_agent_config() {
     echo "** Preparing Zabbix agent configuration file"
     ZBX_AGENT_CONFIG=$ZABBIX_ETC_DIR/zabbix_agent2.conf
@@ -185,14 +200,14 @@ prepare_zbx_agent_config() {
     update_config_var $ZBX_AGENT_CONFIG "UnsafeUserParameters" "${ZBX_UNSAFEUSERPARAMETERS}"
     update_config_var $ZBX_AGENT_CONFIG "TLSConnect" "${ZBX_TLSCONNECT}"
     update_config_var $ZBX_AGENT_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
     update_config_var $ZBX_AGENT_CONFIG "TLSServerCertIssuer" "${ZBX_TLSSERVERCERTISSUER}"
     update_config_var $ZBX_AGENT_CONFIG "TLSServerCertSubject" "${ZBX_TLSSERVERCERTSUBJECT}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
     update_config_var $ZBX_AGENT_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}" "${ZBX_TLSPSK}"
 
     update_config_multiple_var $ZBX_AGENT_CONFIG "DenyKey" "${ZBX_DENYKEY}"
     update_config_multiple_var $ZBX_AGENT_CONFIG "AllowKey" "${ZBX_ALLOWKEY}"
diff --git a/Dockerfiles/agent2/ubuntu/Dockerfile b/Dockerfiles/agent2/ubuntu/Dockerfile
index 8d5082975..69f183fd9 100644
--- a/Dockerfiles/agent2/ubuntu/Dockerfile
+++ b/Dockerfiles/agent2/ubuntu/Dockerfile
@@ -63,6 +63,7 @@ RUN --mount=type=cache,target=/var/lib/apt/,sharing=locked \
     mkdir -p /etc/zabbix/zabbix_agentd.d && \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /var/lib/zabbix/modules && \
     mkdir -p /var/lib/zabbix/buffer && \
     chown --quiet -R zabbix:root /etc/zabbix/ /var/lib/zabbix/ /usr/sbin/zabbix-agent2-plugin/ && \
diff --git a/Dockerfiles/agent2/ubuntu/docker-entrypoint.sh b/Dockerfiles/agent2/ubuntu/docker-entrypoint.sh
index a9e4bda60..0cd44d5d5 100755
--- a/Dockerfiles/agent2/ubuntu/docker-entrypoint.sh
+++ b/Dockerfiles/agent2/ubuntu/docker-entrypoint.sh
@@ -20,6 +20,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 escape_spec_char() {
     local var_value=$1
@@ -112,6 +114,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 prepare_zbx_agent_config() {
     echo "** Preparing Zabbix agent configuration file"
     ZBX_AGENT_CONFIG=$ZABBIX_ETC_DIR/zabbix_agent2.conf
@@ -185,14 +200,14 @@ prepare_zbx_agent_config() {
     update_config_var $ZBX_AGENT_CONFIG "UnsafeUserParameters" "${ZBX_UNSAFEUSERPARAMETERS}"
     update_config_var $ZBX_AGENT_CONFIG "TLSConnect" "${ZBX_TLSCONNECT}"
     update_config_var $ZBX_AGENT_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
     update_config_var $ZBX_AGENT_CONFIG "TLSServerCertIssuer" "${ZBX_TLSSERVERCERTISSUER}"
     update_config_var $ZBX_AGENT_CONFIG "TLSServerCertSubject" "${ZBX_TLSSERVERCERTSUBJECT}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
     update_config_var $ZBX_AGENT_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_AGENT_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_AGENT_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}" "${ZBX_TLSPSK}"
 
     update_config_multiple_var $ZBX_AGENT_CONFIG "DenyKey" "${ZBX_DENYKEY}"
     update_config_multiple_var $ZBX_AGENT_CONFIG "AllowKey" "${ZBX_ALLOWKEY}"
diff --git a/Dockerfiles/proxy-mysql/README.md b/Dockerfiles/proxy-mysql/README.md
index 53a5721a0..7d73a4d7d 100644
--- a/Dockerfiles/proxy-mysql/README.md
+++ b/Dockerfiles/proxy-mysql/README.md
@@ -221,13 +221,18 @@ ZBX_LOGSLOWQUERIES=3000
 ZBX_TLSCONNECT=unencrypted
 ZBX_TLSACCEPT=unencrypted
 ZBX_TLSCAFILE=
+ZBX_TLSCA=
 ZBX_TLSCRLFILE=
+ZBX_TLSCRL=
 ZBX_TLSSERVERCERTISSUER=
 ZBX_TLSSERVERCERTSUBJECT=
 ZBX_TLSCERTFILE=
+ZBX_TLSCERT=
 ZBX_TLSKEYFILE=
+ZBX_TLSKEY=
 ZBX_TLSPSKIDENTITY=
 ZBX_TLSPSKFILE=
+ZBX_TLSPSK=
 ZBX_TLSCIPHERALL= # Available since 4.4.7
 ZBX_TLSCIPHERALL13= # Available since 4.4.7
 ZBX_TLSCIPHERCERT= # Available since 4.4.7
@@ -254,7 +259,7 @@ The volume allows load additional modules and extend Zabbix proxy using ``LoadMo
 
 ### ``/var/lib/zabbix/enc``
 
-The volume is used to store TLS related files. These file names are specified using ``ZBX_TLSCAFILE``, ``ZBX_TLSCRLFILE``, ``ZBX_TLSKEY_FILE`` and ``ZBX_TLSPSKFILE`` variables.
+The volume is used to store TLS related files. These file names are specified using ``ZBX_TLSCAFILE``, ``ZBX_TLSCRLFILE``, ``ZBX_TLSCERTFILE``, ``ZBX_TLSKEYFILE`` and ``ZBX_TLSPSKFILE`` variables. Additionally it is possible to use environment variables ``ZBX_TLSCA``, ``ZBX_TLSCRL``, ``ZBX_TLSCERT``, ``ZBX_TLSKEY`` and ``ZBX_TLSPSK`` with plaintext values.
 
 ### ``/var/lib/zabbix/ssh_keys``
 
diff --git a/Dockerfiles/proxy-mysql/alpine/Dockerfile b/Dockerfiles/proxy-mysql/alpine/Dockerfile
index 59b520577..b7ea01055 100644
--- a/Dockerfiles/proxy-mysql/alpine/Dockerfile
+++ b/Dockerfiles/proxy-mysql/alpine/Dockerfile
@@ -77,6 +77,7 @@ RUN set -eux && \
     mkdir -p /etc/zabbix && \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /usr/lib/zabbix/externalscripts && \
     mkdir -p /var/lib/zabbix/mibs && \
     mkdir -p /var/lib/zabbix/modules && \
diff --git a/Dockerfiles/proxy-mysql/alpine/docker-entrypoint.sh b/Dockerfiles/proxy-mysql/alpine/docker-entrypoint.sh
index 6366dc772..ce7a863f3 100755
--- a/Dockerfiles/proxy-mysql/alpine/docker-entrypoint.sh
+++ b/Dockerfiles/proxy-mysql/alpine/docker-entrypoint.sh
@@ -17,6 +17,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 : ${DB_CHARACTER_SET:="utf8mb4"}
 : ${DB_CHARACTER_COLLATE:="utf8mb4_bin"}
@@ -140,6 +142,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 # Check prerequisites for MySQL database
 check_variables_mysql() {
     if [ ! -n "${DB_SERVER_SOCKET}" ]; then
@@ -474,23 +489,23 @@ update_zbx_config() {
 
     update_config_var $ZBX_CONFIG "TLSConnect" "${ZBX_TLSCONNECT}"
     update_config_var $ZBX_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
 
     update_config_var $ZBX_CONFIG "TLSServerCertIssuer" "${ZBX_TLSSERVERCERTISSUER}"
     update_config_var $ZBX_CONFIG "TLSServerCertSubject" "${ZBX_TLSSERVERCERTSUBJECT}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}" "${ZBX_TLSPSK}"
 
     if [ "$(id -u)" != '0' ]; then
         update_config_var $ZBX_CONFIG "User" "$(whoami)"
diff --git a/Dockerfiles/proxy-mysql/centos/Dockerfile b/Dockerfiles/proxy-mysql/centos/Dockerfile
index f4bb76048..8bfda6893 100644
--- a/Dockerfiles/proxy-mysql/centos/Dockerfile
+++ b/Dockerfiles/proxy-mysql/centos/Dockerfile
@@ -95,6 +95,7 @@ RUN --mount=type=tmpfs,target=/var/lib/dnf/ \
     mkdir -p /etc/zabbix && \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /usr/lib/zabbix/externalscripts && \
     mkdir -p /var/lib/zabbix/mibs && \
     mkdir -p /var/lib/zabbix/modules && \
diff --git a/Dockerfiles/proxy-mysql/centos/docker-entrypoint.sh b/Dockerfiles/proxy-mysql/centos/docker-entrypoint.sh
index d1d03addd..cf28a6623 100755
--- a/Dockerfiles/proxy-mysql/centos/docker-entrypoint.sh
+++ b/Dockerfiles/proxy-mysql/centos/docker-entrypoint.sh
@@ -17,6 +17,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 : ${DB_CHARACTER_SET:="utf8mb4"}
 : ${DB_CHARACTER_COLLATE:="utf8mb4_bin"}
@@ -140,6 +142,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 # Check prerequisites for MySQL database
 check_variables_mysql() {
     if [ ! -n "${DB_SERVER_SOCKET}" ]; then
@@ -471,23 +486,23 @@ update_zbx_config() {
 
     update_config_var $ZBX_CONFIG "TLSConnect" "${ZBX_TLSCONNECT}"
     update_config_var $ZBX_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
 
     update_config_var $ZBX_CONFIG "TLSServerCertIssuer" "${ZBX_TLSSERVERCERTISSUER}"
     update_config_var $ZBX_CONFIG "TLSServerCertSubject" "${ZBX_TLSSERVERCERTSUBJECT}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}" "${ZBX_TLSPSK}"
 
     if [ "$(id -u)" != '0' ]; then
         update_config_var $ZBX_CONFIG "User" "$(whoami)"
diff --git a/Dockerfiles/proxy-mysql/ol/Dockerfile b/Dockerfiles/proxy-mysql/ol/Dockerfile
index ea24794c5..4051349ed 100644
--- a/Dockerfiles/proxy-mysql/ol/Dockerfile
+++ b/Dockerfiles/proxy-mysql/ol/Dockerfile
@@ -82,6 +82,7 @@ RUN --mount=type=tmpfs,target=/var/lib/dnf/ \
     mkdir -p /etc/zabbix && \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /usr/lib/zabbix/externalscripts && \
     mkdir -p /var/lib/zabbix/mibs && \
     mkdir -p /var/lib/zabbix/modules && \
diff --git a/Dockerfiles/proxy-mysql/ol/docker-entrypoint.sh b/Dockerfiles/proxy-mysql/ol/docker-entrypoint.sh
index d1d03addd..cf28a6623 100755
--- a/Dockerfiles/proxy-mysql/ol/docker-entrypoint.sh
+++ b/Dockerfiles/proxy-mysql/ol/docker-entrypoint.sh
@@ -17,6 +17,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 : ${DB_CHARACTER_SET:="utf8mb4"}
 : ${DB_CHARACTER_COLLATE:="utf8mb4_bin"}
@@ -140,6 +142,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 # Check prerequisites for MySQL database
 check_variables_mysql() {
     if [ ! -n "${DB_SERVER_SOCKET}" ]; then
@@ -471,23 +486,23 @@ update_zbx_config() {
 
     update_config_var $ZBX_CONFIG "TLSConnect" "${ZBX_TLSCONNECT}"
     update_config_var $ZBX_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
 
     update_config_var $ZBX_CONFIG "TLSServerCertIssuer" "${ZBX_TLSSERVERCERTISSUER}"
     update_config_var $ZBX_CONFIG "TLSServerCertSubject" "${ZBX_TLSSERVERCERTSUBJECT}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}" "${ZBX_TLSPSK}"
 
     if [ "$(id -u)" != '0' ]; then
         update_config_var $ZBX_CONFIG "User" "$(whoami)"
diff --git a/Dockerfiles/proxy-mysql/rhel/Dockerfile b/Dockerfiles/proxy-mysql/rhel/Dockerfile
index 92102a722..9f2b017ba 100644
--- a/Dockerfiles/proxy-mysql/rhel/Dockerfile
+++ b/Dockerfiles/proxy-mysql/rhel/Dockerfile
@@ -125,6 +125,7 @@ RUN --mount=type=tmpfs,target=/var/lib/dnf/ \
     mkdir -p /etc/zabbix && \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /usr/lib/zabbix/externalscripts && \
     mkdir -p /var/lib/zabbix/mibs && \
     mkdir -p /var/lib/zabbix/modules && \
diff --git a/Dockerfiles/proxy-mysql/rhel/docker-entrypoint.sh b/Dockerfiles/proxy-mysql/rhel/docker-entrypoint.sh
index d1d03addd..cf28a6623 100755
--- a/Dockerfiles/proxy-mysql/rhel/docker-entrypoint.sh
+++ b/Dockerfiles/proxy-mysql/rhel/docker-entrypoint.sh
@@ -17,6 +17,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 : ${DB_CHARACTER_SET:="utf8mb4"}
 : ${DB_CHARACTER_COLLATE:="utf8mb4_bin"}
@@ -140,6 +142,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 # Check prerequisites for MySQL database
 check_variables_mysql() {
     if [ ! -n "${DB_SERVER_SOCKET}" ]; then
@@ -471,23 +486,23 @@ update_zbx_config() {
 
     update_config_var $ZBX_CONFIG "TLSConnect" "${ZBX_TLSCONNECT}"
     update_config_var $ZBX_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
 
     update_config_var $ZBX_CONFIG "TLSServerCertIssuer" "${ZBX_TLSSERVERCERTISSUER}"
     update_config_var $ZBX_CONFIG "TLSServerCertSubject" "${ZBX_TLSSERVERCERTSUBJECT}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}" "${ZBX_TLSPSK}"
 
     if [ "$(id -u)" != '0' ]; then
         update_config_var $ZBX_CONFIG "User" "$(whoami)"
diff --git a/Dockerfiles/proxy-mysql/ubuntu/Dockerfile b/Dockerfiles/proxy-mysql/ubuntu/Dockerfile
index c719fa4d9..8ed522a80 100644
--- a/Dockerfiles/proxy-mysql/ubuntu/Dockerfile
+++ b/Dockerfiles/proxy-mysql/ubuntu/Dockerfile
@@ -80,6 +80,7 @@ RUN --mount=type=cache,target=/var/lib/apt/,sharing=locked \
     mkdir -p /etc/zabbix && \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /usr/lib/zabbix/externalscripts && \
     mkdir -p /var/lib/zabbix/mibs && \
     mkdir -p /var/lib/zabbix/modules && \
diff --git a/Dockerfiles/proxy-mysql/ubuntu/docker-entrypoint.sh b/Dockerfiles/proxy-mysql/ubuntu/docker-entrypoint.sh
index 66fc6f117..bd6bc88da 100755
--- a/Dockerfiles/proxy-mysql/ubuntu/docker-entrypoint.sh
+++ b/Dockerfiles/proxy-mysql/ubuntu/docker-entrypoint.sh
@@ -17,6 +17,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 : ${DB_CHARACTER_SET:="utf8mb4"}
 : ${DB_CHARACTER_COLLATE:="utf8mb4_bin"}
@@ -140,6 +142,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 # Check prerequisites for MySQL database
 check_variables_mysql() {
     if [ ! -n "${DB_SERVER_SOCKET}" ]; then
@@ -471,23 +486,23 @@ update_zbx_config() {
 
     update_config_var $ZBX_CONFIG "TLSConnect" "${ZBX_TLSCONNECT}"
     update_config_var $ZBX_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
 
     update_config_var $ZBX_CONFIG "TLSServerCertIssuer" "${ZBX_TLSSERVERCERTISSUER}"
     update_config_var $ZBX_CONFIG "TLSServerCertSubject" "${ZBX_TLSSERVERCERTSUBJECT}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}" "${ZBX_TLSPSK}"
 
     if [ "$(id -u)" != '0' ]; then
         update_config_var $ZBX_CONFIG "User" "$(whoami)"
diff --git a/Dockerfiles/proxy-sqlite3/README.md b/Dockerfiles/proxy-sqlite3/README.md
index 321bd1f38..9aa037ae9 100644
--- a/Dockerfiles/proxy-sqlite3/README.md
+++ b/Dockerfiles/proxy-sqlite3/README.md
@@ -175,13 +175,18 @@ ZBX_LOGSLOWQUERIES=3000
 ZBX_TLSCONNECT=unencrypted
 ZBX_TLSACCEPT=unencrypted
 ZBX_TLSCAFILE=
+ZBX_TLSCA=
 ZBX_TLSCRLFILE=
+ZBX_TLSCRL=
 ZBX_TLSSERVERCERTISSUER=
 ZBX_TLSSERVERCERTSUBJECT=
 ZBX_TLSCERTFILE=
+ZBX_TLSCERT=
 ZBX_TLSKEYFILE=
+ZBX_TLSKEY=
 ZBX_TLSPSKIDENTITY=
 ZBX_TLSPSKFILE=
+ZBX_TLSPSK=
 ZBX_TLSCIPHERALL= # Available since 4.4.7
 ZBX_TLSCIPHERALL13= # Available since 4.4.7
 ZBX_TLSCIPHERCERT= # Available since 4.4.7
@@ -212,7 +217,7 @@ The volume allows load additional modules and extend Zabbix proxy using ``LoadMo
 
 ### ``/var/lib/zabbix/enc``
 
-The volume is used to store TLS related files. These file names are specified using ``ZBX_TLSCAFILE``, ``ZBX_TLSCRLFILE``, ``ZBX_TLSKEY_FILE`` and ``ZBX_TLSPSKFILE`` variables.
+The volume is used to store TLS related files. These file names are specified using ``ZBX_TLSCAFILE``, ``ZBX_TLSCRLFILE``, ``ZBX_TLSCERTFILE``, ``ZBX_TLSKEYFILE`` and ``ZBX_TLSPSKFILE`` variables. Additionally it is possible to use environment variables ``ZBX_TLSCA``, ``ZBX_TLSCRL``, ``ZBX_TLSCERT``, ``ZBX_TLSKEY`` and ``ZBX_TLSPSK`` with plaintext values.
 
 ### ``/var/lib/zabbix/ssh_keys``
 
diff --git a/Dockerfiles/proxy-sqlite3/alpine/Dockerfile b/Dockerfiles/proxy-sqlite3/alpine/Dockerfile
index bfae3e2aa..fed8eff13 100644
--- a/Dockerfiles/proxy-sqlite3/alpine/Dockerfile
+++ b/Dockerfiles/proxy-sqlite3/alpine/Dockerfile
@@ -75,6 +75,7 @@ RUN set -eux && \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /var/lib/zabbix/db_data && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /usr/lib/zabbix/externalscripts && \
     mkdir -p /var/lib/zabbix/mibs && \
     mkdir -p /var/lib/zabbix/modules && \
diff --git a/Dockerfiles/proxy-sqlite3/alpine/docker-entrypoint.sh b/Dockerfiles/proxy-sqlite3/alpine/docker-entrypoint.sh
index e551aea25..61cec2a7d 100755
--- a/Dockerfiles/proxy-sqlite3/alpine/docker-entrypoint.sh
+++ b/Dockerfiles/proxy-sqlite3/alpine/docker-entrypoint.sh
@@ -17,6 +17,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 escape_spec_char() {
     local var_value=$1
@@ -106,6 +108,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 update_zbx_config() {
     echo "** Preparing Zabbix proxy configuration file"
 
@@ -222,22 +237,22 @@ update_zbx_config() {
 
     update_config_var $ZBX_CONFIG "TLSConnect" "${ZBX_TLSCONNECT}"
     update_config_var $ZBX_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
     update_config_var $ZBX_CONFIG "TLSServerCertIssuer" "${ZBX_TLSSERVERCERTISSUER}"
     update_config_var $ZBX_CONFIG "TLSServerCertSubject" "${ZBX_TLSSERVERCERTSUBJECT}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}" "${ZBX_TLSPSK}"
 
     if [ "$(id -u)" != '0' ]; then
         update_config_var $ZBX_CONFIG "User" "$(whoami)"
diff --git a/Dockerfiles/proxy-sqlite3/centos/Dockerfile b/Dockerfiles/proxy-sqlite3/centos/Dockerfile
index bfc244f0f..538e75938 100644
--- a/Dockerfiles/proxy-sqlite3/centos/Dockerfile
+++ b/Dockerfiles/proxy-sqlite3/centos/Dockerfile
@@ -92,6 +92,7 @@ RUN --mount=type=tmpfs,target=/var/lib/dnf/ \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /var/lib/zabbix/db_data && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /usr/lib/zabbix/externalscripts && \
     mkdir -p /var/lib/zabbix/mibs && \
     mkdir -p /var/lib/zabbix/modules && \
diff --git a/Dockerfiles/proxy-sqlite3/centos/docker-entrypoint.sh b/Dockerfiles/proxy-sqlite3/centos/docker-entrypoint.sh
index e551aea25..61cec2a7d 100755
--- a/Dockerfiles/proxy-sqlite3/centos/docker-entrypoint.sh
+++ b/Dockerfiles/proxy-sqlite3/centos/docker-entrypoint.sh
@@ -17,6 +17,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 escape_spec_char() {
     local var_value=$1
@@ -106,6 +108,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 update_zbx_config() {
     echo "** Preparing Zabbix proxy configuration file"
 
@@ -222,22 +237,22 @@ update_zbx_config() {
 
     update_config_var $ZBX_CONFIG "TLSConnect" "${ZBX_TLSCONNECT}"
     update_config_var $ZBX_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
     update_config_var $ZBX_CONFIG "TLSServerCertIssuer" "${ZBX_TLSSERVERCERTISSUER}"
     update_config_var $ZBX_CONFIG "TLSServerCertSubject" "${ZBX_TLSSERVERCERTSUBJECT}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}" "${ZBX_TLSPSK}"
 
     if [ "$(id -u)" != '0' ]; then
         update_config_var $ZBX_CONFIG "User" "$(whoami)"
diff --git a/Dockerfiles/proxy-sqlite3/ol/Dockerfile b/Dockerfiles/proxy-sqlite3/ol/Dockerfile
index f63068dd2..1e1c68d62 100644
--- a/Dockerfiles/proxy-sqlite3/ol/Dockerfile
+++ b/Dockerfiles/proxy-sqlite3/ol/Dockerfile
@@ -78,6 +78,7 @@ RUN --mount=type=tmpfs,target=/var/lib/dnf/ \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /var/lib/zabbix/db_data && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /usr/lib/zabbix/externalscripts && \
     mkdir -p /var/lib/zabbix/mibs && \
     mkdir -p /var/lib/zabbix/modules && \
diff --git a/Dockerfiles/proxy-sqlite3/ol/docker-entrypoint.sh b/Dockerfiles/proxy-sqlite3/ol/docker-entrypoint.sh
index e551aea25..61cec2a7d 100755
--- a/Dockerfiles/proxy-sqlite3/ol/docker-entrypoint.sh
+++ b/Dockerfiles/proxy-sqlite3/ol/docker-entrypoint.sh
@@ -17,6 +17,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 escape_spec_char() {
     local var_value=$1
@@ -106,6 +108,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 update_zbx_config() {
     echo "** Preparing Zabbix proxy configuration file"
 
@@ -222,22 +237,22 @@ update_zbx_config() {
 
     update_config_var $ZBX_CONFIG "TLSConnect" "${ZBX_TLSCONNECT}"
     update_config_var $ZBX_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
     update_config_var $ZBX_CONFIG "TLSServerCertIssuer" "${ZBX_TLSSERVERCERTISSUER}"
     update_config_var $ZBX_CONFIG "TLSServerCertSubject" "${ZBX_TLSSERVERCERTSUBJECT}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}" "${ZBX_TLSPSK}"
 
     if [ "$(id -u)" != '0' ]; then
         update_config_var $ZBX_CONFIG "User" "$(whoami)"
diff --git a/Dockerfiles/proxy-sqlite3/rhel/Dockerfile b/Dockerfiles/proxy-sqlite3/rhel/Dockerfile
index aa67f778c..656ef7d8e 100644
--- a/Dockerfiles/proxy-sqlite3/rhel/Dockerfile
+++ b/Dockerfiles/proxy-sqlite3/rhel/Dockerfile
@@ -123,6 +123,7 @@ RUN --mount=type=tmpfs,target=/var/lib/dnf/ \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /var/lib/zabbix/db_data && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /usr/lib/zabbix/externalscripts && \
     mkdir -p /var/lib/zabbix/mibs && \
     mkdir -p /var/lib/zabbix/modules && \
diff --git a/Dockerfiles/proxy-sqlite3/rhel/docker-entrypoint.sh b/Dockerfiles/proxy-sqlite3/rhel/docker-entrypoint.sh
index e551aea25..61cec2a7d 100755
--- a/Dockerfiles/proxy-sqlite3/rhel/docker-entrypoint.sh
+++ b/Dockerfiles/proxy-sqlite3/rhel/docker-entrypoint.sh
@@ -17,6 +17,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 escape_spec_char() {
     local var_value=$1
@@ -106,6 +108,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 update_zbx_config() {
     echo "** Preparing Zabbix proxy configuration file"
 
@@ -222,22 +237,22 @@ update_zbx_config() {
 
     update_config_var $ZBX_CONFIG "TLSConnect" "${ZBX_TLSCONNECT}"
     update_config_var $ZBX_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
     update_config_var $ZBX_CONFIG "TLSServerCertIssuer" "${ZBX_TLSSERVERCERTISSUER}"
     update_config_var $ZBX_CONFIG "TLSServerCertSubject" "${ZBX_TLSSERVERCERTSUBJECT}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}" "${ZBX_TLSPSK}"
 
     if [ "$(id -u)" != '0' ]; then
         update_config_var $ZBX_CONFIG "User" "$(whoami)"
diff --git a/Dockerfiles/proxy-sqlite3/ubuntu/Dockerfile b/Dockerfiles/proxy-sqlite3/ubuntu/Dockerfile
index 07807cff4..e01d849a4 100644
--- a/Dockerfiles/proxy-sqlite3/ubuntu/Dockerfile
+++ b/Dockerfiles/proxy-sqlite3/ubuntu/Dockerfile
@@ -77,6 +77,7 @@ RUN --mount=type=cache,target=/var/lib/apt/,sharing=locked \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /var/lib/zabbix/db_data && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /usr/lib/zabbix/externalscripts && \
     mkdir -p /var/lib/zabbix/mibs && \
     mkdir -p /var/lib/zabbix/modules && \
diff --git a/Dockerfiles/proxy-sqlite3/ubuntu/docker-entrypoint.sh b/Dockerfiles/proxy-sqlite3/ubuntu/docker-entrypoint.sh
index 0964de3a9..2fa13b22e 100755
--- a/Dockerfiles/proxy-sqlite3/ubuntu/docker-entrypoint.sh
+++ b/Dockerfiles/proxy-sqlite3/ubuntu/docker-entrypoint.sh
@@ -17,6 +17,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 escape_spec_char() {
     local var_value=$1
@@ -106,6 +108,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 update_zbx_config() {
     echo "** Preparing Zabbix proxy configuration file"
 
@@ -222,22 +237,22 @@ update_zbx_config() {
 
     update_config_var $ZBX_CONFIG "TLSConnect" "${ZBX_TLSCONNECT}"
     update_config_var $ZBX_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
     update_config_var $ZBX_CONFIG "TLSServerCertIssuer" "${ZBX_TLSSERVERCERTISSUER}"
     update_config_var $ZBX_CONFIG "TLSServerCertSubject" "${ZBX_TLSSERVERCERTSUBJECT}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}" "${ZBX_TLSPSK}"
 
     if [ "$(id -u)" != '0' ]; then
         update_config_var $ZBX_CONFIG "User" "$(whoami)"
diff --git a/Dockerfiles/server-mysql/README.md b/Dockerfiles/server-mysql/README.md
index 5fa3c227a..54ba4e349 100644
--- a/Dockerfiles/server-mysql/README.md
+++ b/Dockerfiles/server-mysql/README.md
@@ -207,9 +207,13 @@ ZBX_STARTPROXYPOLLERS=1
 ZBX_PROXYCONFIGFREQUENCY=10
 ZBX_PROXYDATAFREQUENCY=1
 ZBX_TLSCAFILE=
+ZBX_TLSCA=
 ZBX_TLSCRLFILE=
+ZBX_TLSCRL=
 ZBX_TLSCERTFILE=
+ZBX_TLSCERT=
 ZBX_TLSKEYFILE=
+ZBX_TLSKEY=
 ZBX_TLSCIPHERALL= # Available since 4.4.7
 ZBX_TLSCIPHERALL13= # Available since 4.4.7
 ZBX_TLSCIPHERCERT= # Available since 4.4.7
@@ -241,7 +245,7 @@ The volume allows load additional modules and extend Zabbix server using ``LoadM
 
 ### ``/var/lib/zabbix/enc``
 
-The volume is used to store TLS related files. These file names are specified using ``ZBX_TLSCAFILE``, ``ZBX_TLSCRLFILE``, ``ZBX_TLSKEY_FILE`` and ``ZBX_TLSPSKFILE`` variables.
+The volume is used to store TLS related files. These file names are specified using ``ZBX_TLSCAFILE``, ``ZBX_TLSCRLFILE``, ``ZBX_TLSCERTFILE`` and ``ZBX_TLSKEYFILE`` variables. Additionally it is possible to use environment variables ``ZBX_TLSCA``, ``ZBX_TLSCRL``, ``ZBX_TLSCERT`` and ``ZBX_TLSKEY`` with plaintext values.
 
 ### ``/var/lib/zabbix/ssh_keys``
 
diff --git a/Dockerfiles/server-mysql/alpine/Dockerfile b/Dockerfiles/server-mysql/alpine/Dockerfile
index 2e4885786..e77bcf26f 100644
--- a/Dockerfiles/server-mysql/alpine/Dockerfile
+++ b/Dockerfiles/server-mysql/alpine/Dockerfile
@@ -80,6 +80,7 @@ RUN set -eux && \
     mkdir -p /usr/lib/zabbix/alertscripts && \
     mkdir -p /var/lib/zabbix/dbscripts && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /var/lib/zabbix/export && \
     mkdir -p /usr/lib/zabbix/externalscripts && \
     mkdir -p /var/lib/zabbix/mibs && \
diff --git a/Dockerfiles/server-mysql/alpine/docker-entrypoint.sh b/Dockerfiles/server-mysql/alpine/docker-entrypoint.sh
index e0e1db0c7..8c61270ef 100755
--- a/Dockerfiles/server-mysql/alpine/docker-entrypoint.sh
+++ b/Dockerfiles/server-mysql/alpine/docker-entrypoint.sh
@@ -14,6 +14,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 : ${DB_CHARACTER_SET:="utf8mb4"}
 : ${DB_CHARACTER_COLLATE:="utf8mb4_bin"}
@@ -137,6 +139,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 # Check prerequisites for MySQL database
 check_variables_mysql() {
     if [ ! -n "${DB_SERVER_SOCKET}" ]; then
@@ -507,20 +522,17 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "LoadModulePath" "$ZABBIX_USER_HOME_DIR/modules/"
     update_config_multiple_var $ZBX_CONFIG "LoadModule" "${ZBX_LOADMODULE}"
 
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
-
-    update_config_var $ZBX_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "ServiceManagerSyncFrequency" "${ZBX_SERVICEMANAGERSYNCFREQUENCY}"
 
diff --git a/Dockerfiles/server-mysql/centos/Dockerfile b/Dockerfiles/server-mysql/centos/Dockerfile
index 9f3fb2761..ee1148578 100644
--- a/Dockerfiles/server-mysql/centos/Dockerfile
+++ b/Dockerfiles/server-mysql/centos/Dockerfile
@@ -108,6 +108,7 @@ RUN --mount=type=tmpfs,target=/var/lib/dnf/ \
     mkdir -p /usr/lib/zabbix/alertscripts && \
     mkdir -p /var/lib/zabbix/dbscripts && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /var/lib/zabbix/export && \
     mkdir -p /usr/lib/zabbix/externalscripts && \
     mkdir -p /var/lib/zabbix/mibs && \
diff --git a/Dockerfiles/server-mysql/centos/docker-entrypoint.sh b/Dockerfiles/server-mysql/centos/docker-entrypoint.sh
index 8df2036a6..5e89e9c62 100755
--- a/Dockerfiles/server-mysql/centos/docker-entrypoint.sh
+++ b/Dockerfiles/server-mysql/centos/docker-entrypoint.sh
@@ -14,6 +14,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 : ${DB_CHARACTER_SET:="utf8mb4"}
 : ${DB_CHARACTER_COLLATE:="utf8mb4_bin"}
@@ -137,6 +139,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 # Check prerequisites for MySQL database
 check_variables_mysql() {
     if [ ! -n "${DB_SERVER_SOCKET}" ]; then
@@ -504,20 +519,17 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "LoadModulePath" "$ZABBIX_USER_HOME_DIR/modules/"
     update_config_multiple_var $ZBX_CONFIG "LoadModule" "${ZBX_LOADMODULE}"
 
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
-
-    update_config_var $ZBX_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "ServiceManagerSyncFrequency" "${ZBX_SERVICEMANAGERSYNCFREQUENCY}"
 
diff --git a/Dockerfiles/server-mysql/ol/Dockerfile b/Dockerfiles/server-mysql/ol/Dockerfile
index b92eb57ce..6143e74a7 100644
--- a/Dockerfiles/server-mysql/ol/Dockerfile
+++ b/Dockerfiles/server-mysql/ol/Dockerfile
@@ -89,6 +89,7 @@ RUN --mount=type=tmpfs,target=/var/lib/dnf/ \
     mkdir -p /usr/lib/zabbix/alertscripts && \
     mkdir -p /var/lib/zabbix/dbscripts && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /var/lib/zabbix/export && \
     mkdir -p /usr/lib/zabbix/externalscripts && \
     mkdir -p /var/lib/zabbix/mibs && \
diff --git a/Dockerfiles/server-mysql/ol/docker-entrypoint.sh b/Dockerfiles/server-mysql/ol/docker-entrypoint.sh
index 8df2036a6..5e89e9c62 100755
--- a/Dockerfiles/server-mysql/ol/docker-entrypoint.sh
+++ b/Dockerfiles/server-mysql/ol/docker-entrypoint.sh
@@ -14,6 +14,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 : ${DB_CHARACTER_SET:="utf8mb4"}
 : ${DB_CHARACTER_COLLATE:="utf8mb4_bin"}
@@ -137,6 +139,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 # Check prerequisites for MySQL database
 check_variables_mysql() {
     if [ ! -n "${DB_SERVER_SOCKET}" ]; then
@@ -504,20 +519,17 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "LoadModulePath" "$ZABBIX_USER_HOME_DIR/modules/"
     update_config_multiple_var $ZBX_CONFIG "LoadModule" "${ZBX_LOADMODULE}"
 
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
-
-    update_config_var $ZBX_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "ServiceManagerSyncFrequency" "${ZBX_SERVICEMANAGERSYNCFREQUENCY}"
 
diff --git a/Dockerfiles/server-mysql/rhel/Dockerfile b/Dockerfiles/server-mysql/rhel/Dockerfile
index 73aa4414b..4da247433 100644
--- a/Dockerfiles/server-mysql/rhel/Dockerfile
+++ b/Dockerfiles/server-mysql/rhel/Dockerfile
@@ -136,6 +136,7 @@ RUN --mount=type=tmpfs,target=/var/lib/dnf/ \
     mkdir -p /usr/lib/zabbix/alertscripts && \
     mkdir -p /var/lib/zabbix/dbscripts && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /var/lib/zabbix/export && \
     mkdir -p /usr/lib/zabbix/externalscripts && \
     mkdir -p /var/lib/zabbix/mibs && \
diff --git a/Dockerfiles/server-mysql/rhel/docker-entrypoint.sh b/Dockerfiles/server-mysql/rhel/docker-entrypoint.sh
index 8df2036a6..5e89e9c62 100755
--- a/Dockerfiles/server-mysql/rhel/docker-entrypoint.sh
+++ b/Dockerfiles/server-mysql/rhel/docker-entrypoint.sh
@@ -14,6 +14,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 : ${DB_CHARACTER_SET:="utf8mb4"}
 : ${DB_CHARACTER_COLLATE:="utf8mb4_bin"}
@@ -137,6 +139,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 # Check prerequisites for MySQL database
 check_variables_mysql() {
     if [ ! -n "${DB_SERVER_SOCKET}" ]; then
@@ -504,20 +519,17 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "LoadModulePath" "$ZABBIX_USER_HOME_DIR/modules/"
     update_config_multiple_var $ZBX_CONFIG "LoadModule" "${ZBX_LOADMODULE}"
 
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
-
-    update_config_var $ZBX_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "ServiceManagerSyncFrequency" "${ZBX_SERVICEMANAGERSYNCFREQUENCY}"
 
diff --git a/Dockerfiles/server-mysql/ubuntu/Dockerfile b/Dockerfiles/server-mysql/ubuntu/Dockerfile
index a663c832b..cc889b988 100644
--- a/Dockerfiles/server-mysql/ubuntu/Dockerfile
+++ b/Dockerfiles/server-mysql/ubuntu/Dockerfile
@@ -84,6 +84,7 @@ RUN --mount=type=cache,target=/var/lib/apt/,sharing=locked \
     mkdir -p /usr/lib/zabbix/alertscripts && \
     mkdir -p /var/lib/zabbix/dbscripts && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /var/lib/zabbix/export && \
     mkdir -p /usr/lib/zabbix/externalscripts && \
     mkdir -p /var/lib/zabbix/mibs && \
diff --git a/Dockerfiles/server-mysql/ubuntu/docker-entrypoint.sh b/Dockerfiles/server-mysql/ubuntu/docker-entrypoint.sh
index 95d610fe8..47266c7fd 100755
--- a/Dockerfiles/server-mysql/ubuntu/docker-entrypoint.sh
+++ b/Dockerfiles/server-mysql/ubuntu/docker-entrypoint.sh
@@ -14,6 +14,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 : ${DB_CHARACTER_SET:="utf8mb4"}
 : ${DB_CHARACTER_COLLATE:="utf8mb4_bin"}
@@ -137,6 +139,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 # Check prerequisites for MySQL database
 check_variables_mysql() {
     if [ ! -n "${DB_SERVER_SOCKET}" ]; then
@@ -504,20 +519,17 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "LoadModulePath" "$ZABBIX_USER_HOME_DIR/modules/"
     update_config_multiple_var $ZBX_CONFIG "LoadModule" "${ZBX_LOADMODULE}"
 
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
-
-    update_config_var $ZBX_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "ServiceManagerSyncFrequency" "${ZBX_SERVICEMANAGERSYNCFREQUENCY}"
 
diff --git a/Dockerfiles/server-pgsql/README.md b/Dockerfiles/server-pgsql/README.md
index 3d2f215be..b122ad520 100644
--- a/Dockerfiles/server-pgsql/README.md
+++ b/Dockerfiles/server-pgsql/README.md
@@ -208,9 +208,13 @@ ZBX_STARTPROXYPOLLERS=1
 ZBX_PROXYCONFIGFREQUENCY=10
 ZBX_PROXYDATAFREQUENCY=1
 ZBX_TLSCAFILE=
+ZBX_TLSCA=
 ZBX_TLSCRLFILE=
+ZBX_TLSCRL=
 ZBX_TLSCERTFILE=
+ZBX_TLSCERT=
 ZBX_TLSKEYFILE=
+ZBX_TLSKEY=
 ZBX_TLSCIPHERALL= # Available since 4.4.7
 ZBX_TLSCIPHERALL13= # Available since 4.4.7
 ZBX_TLSCIPHERCERT= # Available since 4.4.7
@@ -241,7 +245,7 @@ The volume allows load additional modules and extend Zabbix server using ``LoadM
 
 ### ``/var/lib/zabbix/enc``
 
-The volume is used to store TLS related files. These file names are specified using ``ZBX_TLSCAFILE``, ``ZBX_TLSCRLFILE``, ``ZBX_TLSKEY_FILE`` and ``ZBX_TLSPSKFILE`` variables.
+The volume is used to store TLS related files. These file names are specified using ``ZBX_TLSCAFILE``, ``ZBX_TLSCRLFILE``, ``ZBX_TLSCERTFILE`` and ``ZBX_TLSKEYFILE`` variables. Additionally it is possible to use environment variables ``ZBX_TLSCA``, ``ZBX_TLSCRL``, ``ZBX_TLSCERT`` and ``ZBX_TLSKEY`` with plaintext values.
 
 ### ``/var/lib/zabbix/ssh_keys``
 
diff --git a/Dockerfiles/server-pgsql/alpine/Dockerfile b/Dockerfiles/server-pgsql/alpine/Dockerfile
index 6baa44434..6e59918d0 100644
--- a/Dockerfiles/server-pgsql/alpine/Dockerfile
+++ b/Dockerfiles/server-pgsql/alpine/Dockerfile
@@ -79,6 +79,7 @@ RUN set -eux && \
     mkdir -p /usr/lib/zabbix/alertscripts && \
     mkdir -p /var/lib/zabbix/dbscripts && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /var/lib/zabbix/export && \
     mkdir -p /usr/lib/zabbix/externalscripts && \
     mkdir -p /var/lib/zabbix/mibs && \
diff --git a/Dockerfiles/server-pgsql/alpine/docker-entrypoint.sh b/Dockerfiles/server-pgsql/alpine/docker-entrypoint.sh
index 940fa1ddc..684738c0f 100755
--- a/Dockerfiles/server-pgsql/alpine/docker-entrypoint.sh
+++ b/Dockerfiles/server-pgsql/alpine/docker-entrypoint.sh
@@ -17,6 +17,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 # usage: file_env VAR [DEFAULT]
 # as example: file_env 'MYSQL_PASSWORD' 'zabbix'
@@ -137,6 +139,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 # Check prerequisites for PostgreSQL database
 check_variables_postgresql() {
     file_env POSTGRES_USER
@@ -524,20 +539,17 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "LoadModulePath" "$ZABBIX_USER_HOME_DIR/modules/"
     update_config_multiple_var $ZBX_CONFIG "LoadModule" "${ZBX_LOADMODULE}"
 
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
-
-    update_config_var $ZBX_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "ServiceManagerSyncFrequency" "${ZBX_SERVICEMANAGERSYNCFREQUENCY}"
 
diff --git a/Dockerfiles/server-pgsql/centos/Dockerfile b/Dockerfiles/server-pgsql/centos/Dockerfile
index 41a3c8fa9..1658546b2 100644
--- a/Dockerfiles/server-pgsql/centos/Dockerfile
+++ b/Dockerfiles/server-pgsql/centos/Dockerfile
@@ -111,6 +111,7 @@ RUN --mount=type=tmpfs,target=/var/lib/dnf/ \
     mkdir -p /usr/lib/zabbix/alertscripts && \
     mkdir -p /var/lib/zabbix/dbscripts && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /var/lib/zabbix/export && \
     mkdir -p /usr/lib/zabbix/externalscripts && \
     mkdir -p /var/lib/zabbix/mibs && \
diff --git a/Dockerfiles/server-pgsql/centos/docker-entrypoint.sh b/Dockerfiles/server-pgsql/centos/docker-entrypoint.sh
index 940fa1ddc..684738c0f 100755
--- a/Dockerfiles/server-pgsql/centos/docker-entrypoint.sh
+++ b/Dockerfiles/server-pgsql/centos/docker-entrypoint.sh
@@ -17,6 +17,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 # usage: file_env VAR [DEFAULT]
 # as example: file_env 'MYSQL_PASSWORD' 'zabbix'
@@ -137,6 +139,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 # Check prerequisites for PostgreSQL database
 check_variables_postgresql() {
     file_env POSTGRES_USER
@@ -524,20 +539,17 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "LoadModulePath" "$ZABBIX_USER_HOME_DIR/modules/"
     update_config_multiple_var $ZBX_CONFIG "LoadModule" "${ZBX_LOADMODULE}"
 
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
-
-    update_config_var $ZBX_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "ServiceManagerSyncFrequency" "${ZBX_SERVICEMANAGERSYNCFREQUENCY}"
 
diff --git a/Dockerfiles/server-pgsql/ol/Dockerfile b/Dockerfiles/server-pgsql/ol/Dockerfile
index 64c9b8efa..ada92971c 100644
--- a/Dockerfiles/server-pgsql/ol/Dockerfile
+++ b/Dockerfiles/server-pgsql/ol/Dockerfile
@@ -94,6 +94,7 @@ RUN --mount=type=tmpfs,target=/var/lib/dnf/ \
     mkdir -p /usr/lib/zabbix/alertscripts && \
     mkdir -p /var/lib/zabbix/dbscripts && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /var/lib/zabbix/export && \
     mkdir -p /usr/lib/zabbix/externalscripts && \
     mkdir -p /var/lib/zabbix/mibs && \
diff --git a/Dockerfiles/server-pgsql/ol/docker-entrypoint.sh b/Dockerfiles/server-pgsql/ol/docker-entrypoint.sh
index 940fa1ddc..684738c0f 100755
--- a/Dockerfiles/server-pgsql/ol/docker-entrypoint.sh
+++ b/Dockerfiles/server-pgsql/ol/docker-entrypoint.sh
@@ -17,6 +17,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 # usage: file_env VAR [DEFAULT]
 # as example: file_env 'MYSQL_PASSWORD' 'zabbix'
@@ -137,6 +139,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 # Check prerequisites for PostgreSQL database
 check_variables_postgresql() {
     file_env POSTGRES_USER
@@ -524,20 +539,17 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "LoadModulePath" "$ZABBIX_USER_HOME_DIR/modules/"
     update_config_multiple_var $ZBX_CONFIG "LoadModule" "${ZBX_LOADMODULE}"
 
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
-
-    update_config_var $ZBX_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "ServiceManagerSyncFrequency" "${ZBX_SERVICEMANAGERSYNCFREQUENCY}"
 
diff --git a/Dockerfiles/server-pgsql/rhel/Dockerfile b/Dockerfiles/server-pgsql/rhel/Dockerfile
index 4ac7bf776..5e9ad4a19 100644
--- a/Dockerfiles/server-pgsql/rhel/Dockerfile
+++ b/Dockerfiles/server-pgsql/rhel/Dockerfile
@@ -141,6 +141,7 @@ RUN --mount=type=tmpfs,target=/var/lib/dnf/ \
     mkdir -p /usr/lib/zabbix/alertscripts && \
     mkdir -p /var/lib/zabbix/dbscripts && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /var/lib/zabbix/export && \
     mkdir -p /usr/lib/zabbix/externalscripts && \
     mkdir -p /var/lib/zabbix/mibs && \
diff --git a/Dockerfiles/server-pgsql/rhel/docker-entrypoint.sh b/Dockerfiles/server-pgsql/rhel/docker-entrypoint.sh
index f0e7deed0..30150c20e 100755
--- a/Dockerfiles/server-pgsql/rhel/docker-entrypoint.sh
+++ b/Dockerfiles/server-pgsql/rhel/docker-entrypoint.sh
@@ -17,6 +17,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 # usage: file_env VAR [DEFAULT]
 # as example: file_env 'MYSQL_PASSWORD' 'zabbix'
@@ -137,6 +139,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 # Check prerequisites for PostgreSQL database
 check_variables_postgresql() {
     file_env POSTGRES_USER
@@ -530,20 +545,17 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "LoadModulePath" "$ZABBIX_USER_HOME_DIR/modules/"
     update_config_multiple_var $ZBX_CONFIG "LoadModule" "${ZBX_LOADMODULE}"
 
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
-
-    update_config_var $ZBX_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "ServiceManagerSyncFrequency" "${ZBX_SERVICEMANAGERSYNCFREQUENCY}"
 
diff --git a/Dockerfiles/server-pgsql/ubuntu/Dockerfile b/Dockerfiles/server-pgsql/ubuntu/Dockerfile
index 2cf4312f3..c5670f021 100644
--- a/Dockerfiles/server-pgsql/ubuntu/Dockerfile
+++ b/Dockerfiles/server-pgsql/ubuntu/Dockerfile
@@ -84,6 +84,7 @@ RUN --mount=type=cache,target=/var/lib/apt/,sharing=locked \
     mkdir -p /usr/lib/zabbix/alertscripts && \
     mkdir -p /var/lib/zabbix/dbscripts && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     mkdir -p /var/lib/zabbix/export && \
     mkdir -p /usr/lib/zabbix/externalscripts && \
     mkdir -p /var/lib/zabbix/mibs && \
diff --git a/Dockerfiles/server-pgsql/ubuntu/docker-entrypoint.sh b/Dockerfiles/server-pgsql/ubuntu/docker-entrypoint.sh
index cee63d607..0bc7a0204 100755
--- a/Dockerfiles/server-pgsql/ubuntu/docker-entrypoint.sh
+++ b/Dockerfiles/server-pgsql/ubuntu/docker-entrypoint.sh
@@ -17,6 +17,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 # usage: file_env VAR [DEFAULT]
 # as example: file_env 'MYSQL_PASSWORD' 'zabbix'
@@ -137,6 +139,19 @@ update_config_multiple_var() {
     done
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 # Check prerequisites for PostgreSQL database
 check_variables_postgresql() {
     file_env POSTGRES_USER
@@ -524,20 +539,17 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "LoadModulePath" "$ZABBIX_USER_HOME_DIR/modules/"
     update_config_multiple_var $ZBX_CONFIG "LoadModule" "${ZBX_LOADMODULE}"
 
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
-    update_config_var $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
+    file_process_from_env $ZBX_CONFIG "TLSCRLFile" "${ZBX_TLSCRLFILE}" "${ZBX_TLSCRL}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherAll" "${ZBX_TLSCIPHERALL}"
     update_config_var $ZBX_CONFIG "TLSCipherAll13" "${ZBX_TLSCIPHERALL13}"
     update_config_var $ZBX_CONFIG "TLSCipherCert" "${ZBX_TLSCIPHERCERT}"
     update_config_var $ZBX_CONFIG "TLSCipherCert13" "${ZBX_TLSCIPHERCERT13}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK" "${ZBX_TLSCIPHERPSK}"
     update_config_var $ZBX_CONFIG "TLSCipherPSK13" "${ZBX_TLSCIPHERPSK13}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
-
-    update_config_var $ZBX_CONFIG "TLSPSKIdentity" "${ZBX_TLSPSKIDENTITY}"
-    update_config_var $ZBX_CONFIG "TLSPSKFile" "${ZBX_TLSPSKFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "ServiceManagerSyncFrequency" "${ZBX_SERVICEMANAGERSYNCFREQUENCY}"
 
diff --git a/Dockerfiles/web-service/README.md b/Dockerfiles/web-service/README.md
index defe21d57..1459faeda 100644
--- a/Dockerfiles/web-service/README.md
+++ b/Dockerfiles/web-service/README.md
@@ -91,8 +91,11 @@ Additionally the image allows to specify many other environment variables listed
 ```
 ZBX_TLSACCEPT=unencrypted
 ZBX_TLSCAFILE=
+ZBX_TLSCA=
 ZBX_TLSCERTFILE=
+ZBX_TLSCERT=
 ZBX_TLSKEYFILE=
+ZBX_TLSKEY=
 ZBX_IGNOREURLCERTERRORS=0
 ```
 
@@ -104,7 +107,7 @@ Please use official documentation for [``zabbix_web_service.conf``](https://www.
 
 ### ``/var/lib/zabbix/enc``
 
-The volume is used to store TLS related files. These file names are specified using ``ZBX_TLSCAFILE``, ``ZBX_TLSCERTFILE`` and ``ZBX_TLSKEY_FILE`` variables.
+The volume is used to store TLS related files. These file names are specified using ``ZBX_TLSCAFILE``, ``ZBX_TLSCERTFILE`` and ``ZBX_TLSKEYFILE`` variables. Additionally it is possible to use environment variables ``ZBX_TLSCA``, ``ZBX_TLSCERT`` and ``ZBX_TLSKEY`` with plaintext values.
 
 # The image variants
 
diff --git a/Dockerfiles/web-service/alpine/Dockerfile b/Dockerfiles/web-service/alpine/Dockerfile
index 985fcd517..bc9a8e2ec 100644
--- a/Dockerfiles/web-service/alpine/Dockerfile
+++ b/Dockerfiles/web-service/alpine/Dockerfile
@@ -51,6 +51,8 @@ RUN set -eux && \
         zabbix && \
     mkdir -p /etc/zabbix && \
     mkdir -p /var/lib/zabbix && \
+    mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     chown --quiet -R zabbix:root /etc/zabbix/ /var/lib/zabbix/ && \
     chgrp -R 0 /etc/zabbix/ /var/lib/zabbix/ && \
     chmod -R g=u /etc/zabbix/ /var/lib/zabbix/
diff --git a/Dockerfiles/web-service/alpine/docker-entrypoint.sh b/Dockerfiles/web-service/alpine/docker-entrypoint.sh
index 4ba72eeab..b86938b0b 100755
--- a/Dockerfiles/web-service/alpine/docker-entrypoint.sh
+++ b/Dockerfiles/web-service/alpine/docker-entrypoint.sh
@@ -14,6 +14,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 escape_spec_char() {
     local var_value=$1
@@ -84,6 +86,19 @@ update_config_var() {
 
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 prepare_zbx_web_service_config() {
     echo "** Preparing Zabbix web service configuration file"
     ZBX_CONFIG=$ZABBIX_ETC_DIR/zabbix_web_service.conf
@@ -101,10 +116,10 @@ prepare_zbx_web_service_config() {
     update_config_var $ZBX_CONFIG "Timeout" "${ZBX_TIMEOUT}"
 
     update_config_var $ZBX_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "IgnoreURLCertErrors" "${ZBX_IGNOREURLCERTERRORS}"
 }
diff --git a/Dockerfiles/web-service/centos/Dockerfile b/Dockerfiles/web-service/centos/Dockerfile
index 068b79a57..7d79f1a9e 100644
--- a/Dockerfiles/web-service/centos/Dockerfile
+++ b/Dockerfiles/web-service/centos/Dockerfile
@@ -66,6 +66,7 @@ RUN --mount=type=tmpfs,target=/var/lib/dnf/ \
     mkdir -p /etc/zabbix && \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     chown --quiet -R zabbix:root /etc/zabbix/ /var/lib/zabbix/ && \
     chgrp -R 0 /etc/zabbix/ /var/lib/zabbix/ && \
     chmod -R g=u /etc/zabbix/ /var/lib/zabbix/ && \
diff --git a/Dockerfiles/web-service/centos/docker-entrypoint.sh b/Dockerfiles/web-service/centos/docker-entrypoint.sh
index 4ba72eeab..b86938b0b 100755
--- a/Dockerfiles/web-service/centos/docker-entrypoint.sh
+++ b/Dockerfiles/web-service/centos/docker-entrypoint.sh
@@ -14,6 +14,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 escape_spec_char() {
     local var_value=$1
@@ -84,6 +86,19 @@ update_config_var() {
 
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 prepare_zbx_web_service_config() {
     echo "** Preparing Zabbix web service configuration file"
     ZBX_CONFIG=$ZABBIX_ETC_DIR/zabbix_web_service.conf
@@ -101,10 +116,10 @@ prepare_zbx_web_service_config() {
     update_config_var $ZBX_CONFIG "Timeout" "${ZBX_TIMEOUT}"
 
     update_config_var $ZBX_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "IgnoreURLCertErrors" "${ZBX_IGNOREURLCERTERRORS}"
 }
diff --git a/Dockerfiles/web-service/ol/Dockerfile b/Dockerfiles/web-service/ol/Dockerfile
index f56a31da1..db13731df 100644
--- a/Dockerfiles/web-service/ol/Dockerfile
+++ b/Dockerfiles/web-service/ol/Dockerfile
@@ -60,6 +60,7 @@ RUN --mount=type=tmpfs,target=/var/lib/dnf/ \
     mkdir -p /etc/zabbix && \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     chown --quiet -R zabbix:root /etc/zabbix/ /var/lib/zabbix/ && \
     chgrp -R 0 /etc/zabbix/ /var/lib/zabbix/ && \
     chmod -R g=u /etc/zabbix/ /var/lib/zabbix/ && \
diff --git a/Dockerfiles/web-service/ol/docker-entrypoint.sh b/Dockerfiles/web-service/ol/docker-entrypoint.sh
index 4ba72eeab..b86938b0b 100755
--- a/Dockerfiles/web-service/ol/docker-entrypoint.sh
+++ b/Dockerfiles/web-service/ol/docker-entrypoint.sh
@@ -14,6 +14,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 escape_spec_char() {
     local var_value=$1
@@ -84,6 +86,19 @@ update_config_var() {
 
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 prepare_zbx_web_service_config() {
     echo "** Preparing Zabbix web service configuration file"
     ZBX_CONFIG=$ZABBIX_ETC_DIR/zabbix_web_service.conf
@@ -101,10 +116,10 @@ prepare_zbx_web_service_config() {
     update_config_var $ZBX_CONFIG "Timeout" "${ZBX_TIMEOUT}"
 
     update_config_var $ZBX_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "IgnoreURLCertErrors" "${ZBX_IGNOREURLCERTERRORS}"
 }
diff --git a/Dockerfiles/web-service/rhel/Dockerfile b/Dockerfiles/web-service/rhel/Dockerfile
index 6e131c56e..45cb8546d 100644
--- a/Dockerfiles/web-service/rhel/Dockerfile
+++ b/Dockerfiles/web-service/rhel/Dockerfile
@@ -91,6 +91,7 @@ RUN --mount=type=tmpfs,target=/var/lib/dnf/ \
     mkdir -p /etc/zabbix && \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     chown --quiet -R zabbix:root /etc/zabbix/ /var/lib/zabbix/ && \
     chgrp -R 0 /etc/zabbix/ /var/lib/zabbix/ && \
     chmod -R g=u /etc/zabbix/ /var/lib/zabbix/ && \
diff --git a/Dockerfiles/web-service/rhel/docker-entrypoint.sh b/Dockerfiles/web-service/rhel/docker-entrypoint.sh
index 4ba72eeab..b86938b0b 100755
--- a/Dockerfiles/web-service/rhel/docker-entrypoint.sh
+++ b/Dockerfiles/web-service/rhel/docker-entrypoint.sh
@@ -14,6 +14,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 escape_spec_char() {
     local var_value=$1
@@ -84,6 +86,19 @@ update_config_var() {
 
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 prepare_zbx_web_service_config() {
     echo "** Preparing Zabbix web service configuration file"
     ZBX_CONFIG=$ZABBIX_ETC_DIR/zabbix_web_service.conf
@@ -101,10 +116,10 @@ prepare_zbx_web_service_config() {
     update_config_var $ZBX_CONFIG "Timeout" "${ZBX_TIMEOUT}"
 
     update_config_var $ZBX_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "IgnoreURLCertErrors" "${ZBX_IGNOREURLCERTERRORS}"
 }
diff --git a/Dockerfiles/web-service/ubuntu/Dockerfile b/Dockerfiles/web-service/ubuntu/Dockerfile
index ad44bd0a9..4b74bdf9a 100644
--- a/Dockerfiles/web-service/ubuntu/Dockerfile
+++ b/Dockerfiles/web-service/ubuntu/Dockerfile
@@ -65,6 +65,7 @@ RUN --mount=type=cache,target=/var/lib/apt/,sharing=locked \
     mkdir -p /etc/zabbix && \
     mkdir -p /var/lib/zabbix && \
     mkdir -p /var/lib/zabbix/enc && \
+    mkdir -p /var/lib/zabbix/enc_internal && \
     chown --quiet -R zabbix:root /etc/zabbix/ /var/lib/zabbix/ && \
     chgrp -R 0 /etc/zabbix/ /var/lib/zabbix/ && \
     chmod -R g=u /etc/zabbix/ /var/lib/zabbix/ && \
diff --git a/Dockerfiles/web-service/ubuntu/docker-entrypoint.sh b/Dockerfiles/web-service/ubuntu/docker-entrypoint.sh
index 4ba72eeab..b86938b0b 100755
--- a/Dockerfiles/web-service/ubuntu/docker-entrypoint.sh
+++ b/Dockerfiles/web-service/ubuntu/docker-entrypoint.sh
@@ -14,6 +14,8 @@ fi
 ZABBIX_USER_HOME_DIR="/var/lib/zabbix"
 # Configuration files directory
 ZABBIX_ETC_DIR="/etc/zabbix"
+# Internal directory for TLS related files, used when TLS*File specified as plain text values
+ZABBIX_INTERNAL_ENC_DIR="${ZABBIX_USER_HOME_DIR}/enc_internal"
 
 escape_spec_char() {
     local var_value=$1
@@ -84,6 +86,19 @@ update_config_var() {
 
 }
 
+file_process_from_env() {
+    local config_path=$1
+    local var_name=$2
+    local file_name=$3
+    local var_value=$4
+
+    if [ ! -z "$var_value" ]; then
+        echo -n "$var_value" > "${ZABBIX_INTERNAL_ENC_DIR}/$var_name"
+        file_name="${ZABBIX_INTERNAL_ENC_DIR}/${var_name}"
+    fi
+    update_config_var $config_path "$var_name" "$file_name"
+}
+
 prepare_zbx_web_service_config() {
     echo "** Preparing Zabbix web service configuration file"
     ZBX_CONFIG=$ZABBIX_ETC_DIR/zabbix_web_service.conf
@@ -101,10 +116,10 @@ prepare_zbx_web_service_config() {
     update_config_var $ZBX_CONFIG "Timeout" "${ZBX_TIMEOUT}"
 
     update_config_var $ZBX_CONFIG "TLSAccept" "${ZBX_TLSACCEPT}"
-    update_config_var $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCAFile" "${ZBX_TLSCAFILE}" "${ZBX_TLSCA}"
 
-    update_config_var $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}"
-    update_config_var $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}"
+    file_process_from_env $ZBX_CONFIG "TLSCertFile" "${ZBX_TLSCERTFILE}" "${ZBX_TLSCERT}"
+    file_process_from_env $ZBX_CONFIG "TLSKeyFile" "${ZBX_TLSKEYFILE}" "${ZBX_TLSKEY}"
 
     update_config_var $ZBX_CONFIG "IgnoreURLCertErrors" "${ZBX_IGNOREURLCERTERRORS}"
 }
diff --git a/env_vars/.env_agent b/env_vars/.env_agent
index c1ecda505..e2fd0b588 100644
--- a/env_vars/.env_agent
+++ b/env_vars/.env_agent
@@ -29,12 +29,17 @@
 # ZBX_TLSCONNECT=unencrypted
 # ZBX_TLSACCEPT=unencrypted
 # ZBX_TLSCAFILE=
+# ZBX_TLSCA=
 # ZBX_TLSCRLFILE=
+# ZBX_TLSCRL=
 # ZBX_TLSSERVERCERTISSUER=
 # ZBX_TLSSERVERCERTSUBJECT=
 # ZBX_TLSCERTFILE=
+# ZBX_TLSCERT=
 # ZBX_TLSKEYFILE=
+# ZBX_TLSKEY=
 # ZBX_TLSPSKIDENTITY=
 # ZBX_TLSPSKFILE=
+# ZBX_TLSPSK=
 # ZBX_DENYKEY=system.run[*]
 # ZBX_ALLOWKEY=
diff --git a/env_vars/.env_prx b/env_vars/.env_prx
index 2065570f4..e6c24ec1f 100644
--- a/env_vars/.env_prx
+++ b/env_vars/.env_prx
@@ -50,13 +50,18 @@
 # ZBX_TLSCONNECT=unencrypted
 # ZBX_TLSACCEPT=unencrypted
 # ZBX_TLSCAFILE=
+# ZBX_TLSCA=
 # ZBX_TLSCRLFILE=
+# ZBX_TLSCRL=
 # ZBX_TLSSERVERCERTISSUER=
 # ZBX_TLSSERVERCERTSUBJECT=
 # ZBX_TLSCERTFILE=
+# ZBX_TLSCERT=
 # ZBX_TLSKEYFILE=
+# ZBX_TLSKEY=
 # ZBX_TLSPSKIDENTITY=
 # ZBX_TLSPSKFILE=
+# ZBX_TLSPSK=
 # ZBX_VAULT=HashiCorp # Available since 6.2.0
 # ZBX_VAULTDBPATH=
 # ZBX_VAULTTLSCERTFILE= # Available since 6.2.0
diff --git a/env_vars/.env_srv b/env_vars/.env_srv
index 9c3d48201..0345aca48 100644
--- a/env_vars/.env_srv
+++ b/env_vars/.env_srv
@@ -66,9 +66,13 @@ ZBX_ENABLE_SNMP_TRAPS=true
 # ZBX_PROXYDATAFREQUENCY=1
 # ZBX_LOADMODULE="dummy1.so,dummy2.so,dummy10.so"
 # ZBX_TLSCAFILE=
+# ZBX_TLSCA=
 # ZBX_TLSCRLFILE=
+# ZBX_TLSCRL=
 # ZBX_TLSCERTFILE=
+# ZBX_TLSCERT=
 # ZBX_TLSKEYFILE=
+# ZBX_TLSKEY=
 # ZBX_VAULT=HashiCorp # Available since 6.2.0
 # ZBX_VAULTDBPATH=
 # ZBX_VAULTTLSCERTFILE= # Available since 6.2.0