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Federated Identity Manager (FIM) is a system that assists in managing identities and providing access to resources across different security domains and/or companies.
The advantage of FIM is that an organization is not required to maintain a large database of user credentials for different services and subsystems. An organization maintains only the identity corresponding to its members and may accept credentials from other member organizations under FIM jurisdiction.
An identity is a set of physical and behavioral traits used to distinguish users. Each organization subsystem user self-authenticates to access specific resources and services. Rather than using separate authentication processes for each subsystem, FIM facilitates one user identity for use across multiple systems, which provides resource access. This unique user identity is known as a Federated Identity.
The FIM and user function as follows: