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Trusted small world P2P model based on zero knowledge interactive proof and Bayesian trust network

XIA Ying-jie,SONG Guang-hua,ZHU Ming-zhe,ZHENG Yao(College of Computer Science and Technology,Zhejiang University,Hangzhou 310027,China)  
A trusted small world Peer-to-Peer (P2P) model with role and reputation based access control policies (SW-R2P) was designed to combine the network topology and trust evaluation in P2P network.The model utilizes the zero knowledge interactive proof (ZKIP) scheme to authenticate the group information between peers without transferring any related data.The group information is used to cluster the peers to construct a small world topology.The Bayesian trust network is involved into the SW-R2P model to evaluate the multi-faceted trust of the peer and the group,which supporting the action protocols of peers and the long links between groups.Simulation shows that the SW-R2P model performs much better than the Chord and R2P models in the resources lookup,clustering coefficient and peer reputation error.The SW-R2P model integrates the advantages of small world topology,ZKIP scheme and Bayesian trust network,therefore implements a trustworthy,secure and efficient P2P network.
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