Windows Identity Foundation (WIF) is was an extension to the .NET35, and is integral to .NET45.

Makes it easy for developers to enable advanced identity capabilities in the .NET Framework applications.

Based on interoperable, standard protocols, SAML/, WS-Federation/).

The claims-based identity model can be used to enable:

  • single sign on,
  • personalization,
  • federation,
  • strong authentication,
  • identity delegation,
  • and other identity capabilities

in both ASP.NET (browser/user based) and Windows Communication Foundation (WCF) (machine 2 machine) applications that run on-premises or in the cloud.


WIF was developed around WS-Federation/, which is distinct from SAML-P/ except for the use of the SAML/ syntax for (some|all?) messages.


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