Shibboleth is an established open-source identity federation system that uses SAML and related standards to enable single sign-on and attribute-based access control across organizational boundaries. It includes Identity Provider and Service Provider software, metadata management, attribute release policies, and directory integrations.
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Shibboleth is an open-source implementation for federated identity and single sign-on using SAML.
Shibboleth emerged around 2000 from an Internet2/MACE initiative for trusted identity federations and is maintained by the Shibboleth Consortium community.
An identity provider authenticates people and releases selected attributes. A service provider trusts the federation, validates SAML messages, and maps attributes to local permissions.
The IdP authenticates users and provides identity attributes.
The SP protects an application and processes federated sign-ins.
SAML carries signed authentication and attribute assertions between parties.
Shibboleth fits higher-education, government, and enterprise federations. Metadata trust, attribute minimization, certificate rotation, session lifetime, and local authorization are decisive.
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