diff --git a/docs/index.rst b/docs/index.rst
index c3adbd42514ab7e3b609824fd8be2ff09198b08f..4479c8909fd90100155c6914f16206d2cc2a5b08 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -3,5 +3,22 @@
    You can adapt this file completely to your liking, but it should at least
    contain the root `toctree` directive.
 
-tgauth*
-=======
+TG-auth*
+========
+
+----------------
+identify Request
+----------------
+
+The tg-auth* system consists of two main components:
+
+    * openRBAC, a system to maintain, modify, and enforce authorization policies using the Role-Based Access Control framework. See http://www.openrbac.de/, however, the basic software has been heavily customized for use with TextGrid
+    * WebAuthN, a system offering authentication functionalities, both direct using a community-managed user directory and the Shibboleth-based DFN-AAI. WebAuthN is embedded in TextGridLab offering a Login Screen and registers the user in RBAC.
+
+There are some minor components interacting with tg-auth* (now obsolete since the TextGrid and DARIAH Accounts has been merged… please use the DARIAH Self Service Portal):
+
+    * PWchange, a Web application allowing for setting a new password in case the user knows their old one
+    * PWreset, a Web application that lets users set a new password in case they forgot their old one
+
+
+