Custom WCF authentication with System.ServiceModel.ServiceAuthenticationManager?

I'm working on custom WCF authentication and authorization and found some articles about UserNamePasswordValidator and ServiceAuthorizationManager.

I also found clues about using a custom System.ServiceModel.ServiceAuthenticationManager (dead link ), but msdn does not tell a lot about it ( http://msdn.microsoft.com/en-us/library/system.servicemodel.serviceauthenticationmanager.aspx ).

So here I am: anyone knows more about ServiceAuthenticationManager ?

In general, how would you set up custom WCF authentication ?