Claims has truly found its way into this product, it is becoming the defacto method for authentication in SharePoint 2013. And you can do some really amazing things with it, and I plan to put out more info about claims in the future, but for now I thought a little bit of knowledge is enough.
I found this blog about what the claim meant, I remember discussing this at some point with my coworkers but then promptly forgot it. So maybe this time I won’t forget and you guys can benefit at the same time.
SharePoint 2013 and SharePoint 2010 claims encoding