What are single sign-on and federated authentication?
Single sign-on (SSO, also often referred to as reduced sign-on) is the name for a group of technologies that allows you to access a variety of web applications without entering your username and password each time. Federated authentication allows members of one organization to use their authentication credentials to access a web application in another institution. The two are often combined to "stack" the benefits of both technologies.
Indiana University uses both CAS (Central Authentication Service) and Shibboleth for SSO authentication. For information about SSO at IU, see Should I use CAS or Shibboleth for authentication to my service?
For information about SSO on the Extreme Science and Engineering Discovery Environment (XSEDE), see XSEDE Single Sign-On.
For more, see Wikipedia's Single sign-on.
Last modified on January 17, 2014.