Introduction to Identity Federation
What is Identity Federation?
A federated identity in information technology is the means of linking a person's electronic identity and attributes, stored across multiple distinct identity management systems.
It is related to single sign-on (SSO), in which a user's single authentication ticket, or token, is trusted across multiple IT systems or even organizations. SSO is a subset of federated identity management, as it relates only to authentication and is understood on the level of technical interoperability and it would not be possible without some sort of federation.
With the identity federeation we get to separate the applications and, the login and get permissions process. Currently, there are two mainstream identity federation standards: SAML and OpenID-Connect.
SAML (Security Assertion Markup Language)
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Visit the SAML Chapter for more information.
OpenID-Connect
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Visit the OpenID-Connect Chapter for more information.