What is SAML2.0?

SAML 2.0 (Security Assertion Markup Language 2.0) is an open standard for exchanging authentication and authorization data between security domains, an identity provider (IdP) and a service provider (SP). It is commonly used for Single Sign-On (SSO) to allow users to access multiple web applications with one set of credentials. SAML enables web-based, cross-domain single sign-on (SSO), which reduces the administrative overhead of distributing multiple authentication tokens to the user. It uses XML for assertions and requests/responses.