The Central Authentication Service (CAS) is a single sign-on protocol for the web. Its purpose is to permit a user to access multiple applications while providing their credentials (such as userid and password) only once. It also allows web applications to authenticate users without gaining access to a user’s security credentials, such as a password. CAS allows the customer to manage his own authentication system, its maintenance and the rights of access to services CrossKnowledge.


About the provider

CAS was conceived and developed by Shawn Bayern of Yale University Technology and Planning. It was later maintained by Drew Mazurek at Yale. In December 2006, the Andrew W. Mellon Foundation awarded Yale its First Annual Mellon Award for Technology Collaboration, in the amount of $50,000, for Yale’s development of CAS. At the time of that award CAS was in use at “hundreds of university campuses (among other beneficiaries)”.

CAS Single Sign-On for the Web


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