title: Session termination in single logout using SAML
body: <p>Let us say we have a user who is accessing three different services using <code>Single sign-on</code>.
  On clicking on Logout the session with current Sp can be identified and terminated.</p>
  
  <p>Here on, it is the responsibility of <code>IdP</code> to log the user out from the other two services.
  My question is how the sessions with the remaining two services will be obtained and terminated?</p>