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Federated Identity as a Service

Kurzfassung (in Englisch):

Identity management plays a key role in e-Government. Giving the increasing number of cloud applications, also in the field of e-Government, identity management is also vital in the area of cloud computing. Several cloud identity models have already emerged, whereas the so-called “Identity as a Service”-model seems to be the most promising one. Cloud service providers currently implement this model by relying on a central identity broker, acting as a hub between different service and identity providers. While the identity broker model has a couple of advantages, still some disadvantages can be identified. One major drawback of the central identity broker model is that both the user and the service provider must rely on one and the same identity broker for identification and authentication. This heavily decreases flexibility and hinders freedom of choice for selecting other identity broker implementations. We by-pass this issue by proposing a federated identity as a service model, where identity brokers are interconnected. This federated identity as a service model retains the benefits but eliminates the drawbacks of the central cloud identity broker model.

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