What is SAML 2.0?

SAML 2.0 (Security Assertion Markup Language 2.0) is an open standard for Single Sign-On (SSO). It lets users log in once and then access multiple apps without logging in again. In identity management, SAML 2.0 supports federated authentication. This means it securely passes identity data between:

the Identity Provider (IdP) → the system that checks the user’s credentials the Service Provider (SP) → the app or service the user wants to use

SAML 2.0 is widely used in enterprises to simplify logins and improve security across different domains and apps.