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+End-to-end Encryption API documentation
+=======================================
+
+E2EEPlugin
+----------
+
+.. module:: poezio.plugin_e2ee
+
+
+.. autoclass:: E2EEPlugin
+  :members:
+
+Builds on top of :py:class:`~BasePlugin` and requires the developer to
+implement two methods, `decrypt` and `encrypt`, as well as the
+`encryption_name` and `eme_ns` attribute.
+
+Please refer to :py:class:`~BasePlugin` for more information on how to
+write plugins.
+
+Example plugins
+---------------
+
+**Example 1:** Base64 plugin
+
+.. code-block:: python
+
+    from base64 import b64decode, b64encode
+    from poezio.plugin_e2ee import E2EEPlugin
+    from slixmpp import Message
+
+
+    class Plugin(E2EEPlugin):
+        """Base64 Plugin"""
+
+        encryption_name = 'base64'
+        encryption_short_name = 'b64'
+        eme_ns = 'urn:xmpps:base64:0'
+
+        # This encryption mechanism is using <body/> as a container
+        replace_body_with_eme = False
+
+        def decrypt(self, message: Message, _tab) -> None:
+            """
+                Decrypt base64
+            """
+            body = message['body']
+            message['body'] = b64decode(body.encode()).decode()
+
+        def encrypt(self, message: Message, _tab) -> None:
+            """
+                Encrypt to base64
+            """
+            # TODO: Stop using <body/> for this. Put the encoded payload in another element.
+            body = message['body']
+            message['body'] = b64encode(body.encode()).decode()