SimpleSAMLphp is a simple application written in native PHP that deals with authentication. SimpleSAMLphp supports several federation protocols, authentication mechanisms and can be used both for local authentication, as a service provider or as an identity provider This plugin uses some hooks in WordPress’s authentication system to bypass the normal login screen and authenticate using a simpleSAMLphp Service Provider (SP) instead. Note that logged-in state is still maintained in cookies, and user entries are created in the local database. Who made this? Thanks to Stephen Schwink who developed the the CAS Authentication plugin on which this plugin is heavily based.