Understanding federated identity
Federated identity management is a relatively new concept that is an extension of identity management, which is a centralized, automated approach to regulating access to enterprise resources by employees and other authorized individuals.
The focus of identity management is defining an identity for each user (human or process), associating attributes with the identity and enforcing a means by which a user can verify identity. Once implemented, identity-management systems support single sign-on (SSO), the ability of a user to access all network resources after a single authentication.
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