Shibboleth
“Shibboleth is the standard federated authentication and attribute query service protocol in the higher education. It was designed from the ground up to support the pseudo-anonymous login scenarios required by the libraries.
Shibboleth has strong support from the Internet2. It is also on a converging path with similar commercial efforts (Liberty Alliance)."
- takenTaken from EDIMIassumptions.doc found on AIS website