ISSN : 1796-203X
Volume : 3    Issue : 10    Date : October 2008

SW-R2P: A Trusted Small World Overlay P2P Network with Zero Knowledge Identification
Yingjie Xia, Guanghua Song, and Yao Zheng
Page(s): 3-11
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In order to implement both the efficiency and security in the Peer-to-Peer (P2P) network, we design
a trusted small world overlay P2P network with the role based and reputation based access control
policies, denoted as SW-R2P. The SW-R2P system integrates the small world topology with zero
knowledge identification and Bayesian trust model. The zero knowledge identification is utilized to
securely cluster all the peers into several groups without transferring any related information. The
peer groups are then linked together to construct a trusted small world network based on the
probabilities calculated by the Bayesian trust model. The simulation experiments demonstrate that
the SW-R2P system achieves the performance with increased success rate in the resources
lookup, strengthened robustness under the overwhelming traffic loadings, reduced reputation
errors caused by the malicious peers and enhanced peer satisfaction rate for different trust metrics.
In conclusion, the SW-R2P system collectively exploits the advantages of small world, zero
knowledge identification and Bayesian trust model, therefore implementing a scalable, secure and
efficient P2P network.

Index Terms
Peer-to-Peer network, trusted small world, zero knowledge identification, Bayesian trust model,