SharePoint 2013 Authentication Explained

A new set of conceptual videos that describe SharePoint 2013 authentication processes are now available:

These videos step you through the details of claims-based authentication for user access to a secure SharePoint resource.

Got to be worth a watch given how darned confusing this space can be!

The entire blog post about them and a whole set of test guides is here:

http://blogs.technet.com/b/tothesharepoint/archive/2013/04/16/new-sharepoint-2013-authentication-process-and-test-lab-guide-overview-videos.aspx