A Double Pseudonyms Authentication for Distributed P2P Systems

To meet the specialized requirements of P2P systems, such as equality, lack of permanent peer and controlled anonymity, a double pseudonyms authentication scheme named DPA is suggested in this paper for distributed P2P systems, at which a trust model, Public Key Infrastructure (PKI) and one-way hash function are applied. The peer, instead of using its real identity, generates double pseudonyms using one-way hash functions to realize anonymous authentication. One is to replace the real identity of a peer, and the other is to certificate the former. And the peers´ mutual authentication is performed by super peer dynamically selected by a trust model. So no permanent peers are needed, which is suitable to distributed P2P systems. We evaluate the efficacy of DPA by comparisons with PKI and MAM, and the experiments show the efficiency of DPA, which can effectively realize anonymous authentication between peers in distributed P2P systems.