diff --git a/data/templates/ipsec/swanctl.conf.j2 b/data/templates/ipsec/swanctl.conf.j2
index 698a9135ef..64e7ea860c 100644
--- a/data/templates/ipsec/swanctl.conf.j2
+++ b/data/templates/ipsec/swanctl.conf.j2
@@ -87,7 +87,11 @@ secrets {
         id-{{ gen_uuid }} = "{{ id }}"
 {%             endfor %}
 {%         endif %}
+{%         if psk_config.secret_type is vyos_defined('base64') %}
+        secret = 0s{{ psk_config.secret }}
+{%         elif psk_config.secret_type is vyos_defined('plaintext') %}
         secret = "{{ psk_config.secret }}"
+{%         endif %}
     }
 {%     endfor %}
 {% endif %}
diff --git a/interface-definitions/vpn_ipsec.xml.in b/interface-definitions/vpn_ipsec.xml.in
index d9d6fd93bb..5540021e23 100644
--- a/interface-definitions/vpn_ipsec.xml.in
+++ b/interface-definitions/vpn_ipsec.xml.in
@@ -41,6 +41,18 @@
                       </valueHelp>
                     </properties>
                   </leafNode>
+                  <leafNode name="secret-type">
+                    <properties>
+                      <help>Secret type</help>
+                      <completionHelp>
+                        <list>base64 plaintext</list>
+                      </completionHelp>
+                      <constraint>
+                        <regex>(base64|plaintext)</regex>
+                      </constraint>
+                    </properties>
+                    <defaultValue>plaintext</defaultValue>
+                  </leafNode>
                 </children>
               </tagNode>
             </children>
diff --git a/python/vyos/utils/convert.py b/python/vyos/utils/convert.py
index dd4266f57c..2f587405d4 100644
--- a/python/vyos/utils/convert.py
+++ b/python/vyos/utils/convert.py
@@ -235,3 +235,29 @@ def convert_data(data) -> dict | list | tuple | str | int | float | bool | None:
     # which cannot be converted to JSON
     # for example: complex | range | memoryview
     return
+
+
+def encode_to_base64(input_string):
+    """
+    Encodes a given string to its base64 representation.
+
+    Args:
+        input_string (str): The string to be encoded.
+
+    Returns:
+        str: The base64-encoded version of the input string.
+
+    Example:
+        input_string = "Hello, World!"
+        encoded_string = encode_to_base64(input_string)
+        print(encoded_string)  # Output: SGVsbG8sIFdvcmxkIQ==
+    """
+    import base64
+    # Convert the string to bytes
+    byte_string = input_string.encode('utf-8')
+
+    # Encode the byte string to base64
+    encoded_string = base64.b64encode(byte_string)
+
+    # Decode the base64 bytes back to a string
+    return encoded_string.decode('utf-8')
diff --git a/smoketest/scripts/cli/test_vpn_ipsec.py b/smoketest/scripts/cli/test_vpn_ipsec.py
index de18d04274..f2bea58d1c 100755
--- a/smoketest/scripts/cli/test_vpn_ipsec.py
+++ b/smoketest/scripts/cli/test_vpn_ipsec.py
@@ -21,6 +21,7 @@
 
 from vyos.configsession import ConfigSessionError
 from vyos.ifconfig import Interface
+from vyos.utils.convert import encode_to_base64
 from vyos.utils.process import process_named_running
 from vyos.utils.file import read_file
 
@@ -495,6 +496,7 @@ def test_flex_vpn_vips(self):
         local_id = 'vyos-r1'
         remote_id = 'vyos-r2'
         peer_base_path = base_path + ['site-to-site', 'peer', connection_name]
+        secret_base64 = encode_to_base64(secret)
 
         self.cli_set(tunnel_path + ['tun1', 'encapsulation', 'gre'])
         self.cli_set(tunnel_path + ['tun1', 'source-address', local_address])
@@ -509,7 +511,8 @@ def test_flex_vpn_vips(self):
         self.cli_set(base_path + ['authentication', 'psk', connection_name, 'id', remote_id])
         self.cli_set(base_path + ['authentication', 'psk', connection_name, 'id', local_address])
         self.cli_set(base_path + ['authentication', 'psk', connection_name, 'id', peer_ip])
-        self.cli_set(base_path + ['authentication', 'psk', connection_name, 'secret', secret])
+        self.cli_set(base_path + ['authentication', 'psk', connection_name, 'secret', secret_base64])
+        self.cli_set(base_path + ['authentication', 'psk', connection_name, 'secret-type', 'base64'])
 
         self.cli_set(peer_base_path + ['authentication', 'local-id', local_id])
         self.cli_set(peer_base_path + ['authentication', 'mode', 'pre-shared-secret'])
@@ -546,7 +549,7 @@ def test_flex_vpn_vips(self):
             f'id-{regex_uuid4} = "{remote_id}"',
             f'id-{regex_uuid4} = "{peer_ip}"',
             f'id-{regex_uuid4} = "{local_address}"',
-            f'secret = "{secret}"',
+            f'secret = 0s{secret_base64}',
         ]
 
         for line in swanctl_secrets_lines: