Welcome to the home of the JA-SIG Central Authentication Service. CAS provides enterprise single sign on service:

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  • An open and well-documented protocol
  • An open-source Java server component
  • A library of clients for Java, .Net, PHP, Perl, Apache, uPortal, and others
  • Integrates with uPortal, BlueSocket, TikiWiki, Mule, Liferay, Moodle and others
  • Community documentation and implementation support
  • An extensive community of adopters

What is CAS?

CAS is an authentication system originally created by Yale University to provide a trusted way for an application to authenticate a user. CAS became a JA-SIG project in December 2004.

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Getting Started

The CAS community provides guides for whatever you're looking for, including installing, deploying, clustering, and customizing:


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Community

CAS has an extensive community of adoptors and integrators. This vibrant community is home to active mailing lists, a Wiki, and more!

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