Disclaimer: I work for Liferay now; however, I answered this question long before I started to work here. Also, Liferay has pivoted a bit in these years. Nonetheless, I believe the core of the answer still applies. My companyThe company I worked for is a Liferay Inc. partner, so I have a lot of experience … Read more
CAS-Server: A stand-alone central login page where the user enters their credentials (i.e. their username and password). CAS supports the standardized SAML 1.1 protocol primarily to support attribute release to clients and single sign-out. (a table in a SQL database, ActiveDirectory/LDAP, Google accounts, etc.) Full compatibility with the open, multi-platform CAS protocol (CAS clients are … Read more
OpenID is not a ‘successor’ or ‘substitute’ for CAS, they’re different, in intent and in implementation. CAS centralizes authentication. Use it if you want all your (probably internal) applications to ask users to login to a single server (all applications are configured to point to a single CAS server). OpenID decentralizes authentication. Use it if … Read more