Nice overview of what Federation brings to the table for the enterprise and how it can change the horizon of IdM. It is interesting to note that authentication is mentioned as the first hurdle to overcome before moving to a federated environment. This is one of the most difficult IdM services to implement and requires a lot of planning for the future.
If you implement a point solution for solving authentication, getting to any Federated environment will be very difficult. Design with the future in mind, make sure you implement the right solutions when you tackle Authentication.
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