Identity Federation Infrastructure – Overview

The below should give a simple overview to the infrastructure of identity federation. The approach is generic, however my experience is vastly within the Microsoft portfolio of identity federation products. The following description is from an infrastructure perspective and does not cover the solution specific elements like the claim specification e.g.

Illustrated
IdentityFederation
Directory Services: Active Directory, eDirectory, Red Hat Directory Server
Consumer: SharePoint, CRM
Federator: Active Directoy Federation Services, Azure Account Control Service, Novell Access Manager

Explained
A federator(Identity Provider) can federate its own organization identities to either another federator or to a consumer.
The relying party is created from either the consumer or another federator, to the federator providing the identities.
A federator can federate one or more organizational identities to the same consumer.

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