symfony
diff --git a/‎cookbook/security/api_key_authentication.rst
+5 b/‎cookbook/security/api_key_authentication.rst
+5
diff --git a/‎cookbook/security/custom_authentication_provider.rst
+1 b/‎cookbook/security/custom_authentication_provider.rst
+1
diff --git a/‎cookbook/security/custom_password_authenticator.rst
+5 b/‎cookbook/security/custom_password_authenticator.rst
+5
@@ -4,6 +4,11 @@
 How to Authenticate Users with API Keys
 =======================================
 
+.. tip::
+
+    Check out :doc:`/cookbook/security/guard-authentication` for a simpler and more
+    flexible way to accomplish custom authentication tasks like this.
+
 Nowadays, it's quite usual to authenticate the user via an API key (when developing
 a web service for instance). The API key is provided for every request and is
 passed as a query string parameter or via an HTTP header.
 
@@ -10,6 +10,7 @@ How to Create a custom Authentication Provider
     you through that process. But depending on your needs, you may be able
     to solve your problem in a simpler, or via a community bundle:
 
+    * :doc:`/cookbook/security/guard-authentication`
     * :doc:`/cookbook/security/custom_password_authenticator`
     * :doc:`/cookbook/security/api_key_authentication`
     * To authenticate via OAuth using a third-party service such as Google, Facebook
 
@@ -4,6 +4,11 @@
 How to Create a Custom Form Password Authenticator
 ==================================================
 
+.. tip::
+
+    Check out :doc:`/cookbook/security/guard-authentication` for a simpler and more
+    flexible way to accomplish custom authentication tasks like this.
+
 Imagine you want to allow access to your website only between 2pm and 4pm
 UTC. Before Symfony 2.4, you had to create a custom token, factory, listener
 and provider. In this entry, you'll learn how to do this for a login form