Which roles are defined in the SAML Specification 2.0?

The roles defined in the SAML (Security Assertion Markup Language) Specification 2.0 are crucial for understanding how identity management and access control work in a federated environment. The correct answer highlights three key roles: the Principal, Identity Provider, and Service Provider.

The Principal is the entity that wishes to access services, typically a user or an application needing to authenticate. The Identity Provider plays a vital role in authenticating the Principal and issuing security tokens (assertions) that provide proof of identity to Service Providers. The Service Provider, in turn, is the entity that provides services to the Principal and relies on the assertions provided by the Identity Provider to grant access.

The phrase "Most used federated SSO" in the last part of the option does not correspond with formal terminology found within the SAML specification and does not accurately represent a defined role. Instead, the roles of the Identity Provider and Service Provider are well-established elements in enabling Single Sign-On (SSO) in a federated identity model.

In summary, the answer correctly lists the roles integral to SAML 2.0, providing a clear framework that outlines how federated identity management systems operate. Understanding these roles is essential for implementing secure access in complex environments involving multiple organizations