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The rapid rise of federated enterprises entails a new way of trust management by the fact that the enterprise can account for partial trust of its a-liating organizations. On the other hand, password has historically been used as a main means for user authentication because of operational simplicity. We are thus motivated to explore the use of short password for user authentication and key exchange in the context of federated enterprises. Exploiting the special structure of a federated enterprise, our proposed new architecture comprises an external server (managed by each a-liating organization) and a central server (managed by the enterprise headquarter). We are concerned with the development of an e-cient authentication and key exchange protocol using password, built over the new architecture. The architecture together with the pro- tocol well addresses ofi-line dictionary attacks initiated at the server side, a problem rarely considered in prior efiort.

A New Architecture for User Authentication and Key Exchange Using Password for Federated Enterprises