How is Azure ACS authentication secured?
问题 Thanks to Gaurav Mantri for answering my earlier question Azure ACS Set Up in C#. However can someone explains to me, how the following line is secured ? if (!ClaimsPrincipal.Current.Identity.IsAuthenticated) The client in the ACS schema is conveniently a man in the middle , he might fail loging into Facebook, for example and this gets relayed to ACS (I'm assuming this portion is secured), but now ACS is telling the client to go back to the relying party about the failure. How is that last