Federated web single sign-on system (Apache module)

 The Shibboleth System is a standards based software package for web
 single sign-on across or within organizational boundaries. It supports
 authorization and attribute exchange using the OASIS SAML 2.0 protocol.
 Shibboleth allows sites to make informed authorization decisions for
 individual access of protected online resources while allowing users to
 establish their identities with their local authentication systems.
 .
 This package contains the Shibboleth Apache module for service providers
 (web servers providing resources protected by Shibboleth) and the
 supporting shibd daemon.