Research On Reputation-based Trust Model In The Peer-to-Peer Network

Recently, with the rapid development of Internet, the peer-to-peer network technology has gradually become a focus of concern. However, because the autonomous behaviors of the peer in network, the factors of unreliable service and security risk caused by the autonomous behaviors of the peers in network, constraints the cooperation mechanism of peers in network, so the trust relationship between peer in peer-to-peer network can not be constructed, reduces the quality of the peer-to-peer network service.Therefore, it is an important way to solve these problems through creating an effective trust mechanism in the peer-to-peer network, which is currently a hot topic for peer-to-peer network security.Through analysis and study of existing trust model for peer-to-peer network, this thesis describes a new trust model based on reputation in the peer-to-peer network. On the one hand, this model improves the description form of trust information and describes the trust information of peers with the reputation and satisfaction of the peers. Not only can this methods more accurately describe the trust information of peers, but also reduces the consume of system resources for the trust model, and this conducive to resolving the problem of network load caused by calculating trust value; on the other hand, this model improves the calculation method of trust value by the characteristics of real-time in peer-to-peer network, while calculating, pays more attention the recent performance of peers and increases the punishment of malicious peers, so that it can efficiently suppress the waver behavior of the malicious peers and improve the performance of the peer-to-peer network.Finally, in order to verify the effectiveness of our trust model, we have designed and completed a large number of simulation experiments, comparative analysis with the Eigen Trust model. The simulation experiments show that the trust model in this thesis can effectively evaluate the trust of the peers, and avoid the impact of malicious peers, therefore the overall quality of peer-to-peer network services is improved.