title: What's the difference between WS-Trust, OpenID, and SAML Passive?
body: <p>Seems that Microsoft ADFSv2 supports WS-Trust, and SAML Passive, but the WIF stack it's built upon doesn't support SAML.</p>
  
  <p>What is the difference between WS-Trust and SAML-P?  Do they share the same security vulnerabilities, if so what are they?</p>
  
  <p>Note: There is a similar, but different question here:</p>
  
  <p><a href="https://stackoverflow.com/questions/2837553/saml-vs-federated-login-with-oauth">SAML vs OAuth</a></p>