What is SimpleSAMLphp?
SimpleSAMLphp is an open source product which enables (federated) authentication and authorization for web applications across organizations. Some European university federations are exclusively using SimpleSAMLphp.
Based on the XML standard SAML (Security Assertion Markup Language), SimpleSAMLphp enables Single Sign-On (SSO). This means that, within a federation, a user only needs to authenticate themselves once in order to access multiple services that are subject to registration.
Initially developed by employees of the Norwegian research network Uninett, today the project SimpleSAMLphp is in the hands of a large open source community.