Artemis-Connection/Connector-Interface.md

@@ -20,6 +20,10 @@ A Connected Service may support various **actions**. Each action provides is own
 
 It is in the responsibility of the connector, to ensure the authentication and/or authorization of the user, if needed. Some interfaces may require explicit authentication of the user of the connected service. A user is typically authenticated by a valid oAuth2-token of the backbone gitlab system.
 
+The authentication between the sharing plattform and the connected application is achieved with a shared secret string.
+
+In some cases urls are transferred via the user browser: In these cases the url is secured by an additional check-sum including the shared secret key, to deny url forgery.
+
 ### Configuration
 
 An administrator of the sharing platform registers a _connector action_ (with a given plugin-URL).