The Research Of Peer-to-Peer Trust Model Based On Reputation Under JXTA Platform

Software products based on P2P techniques are more and more accepted and favored, but most existing P2P systems are short of effective mechanisms to improve their securities. Secure problem becomes the main obstacle that P2P applications not be adopted widely. How to build trust relationships between peers of P2P system and manage the relationships effectively becomes an important subject of P2P techniques research area.In this paper, we presents a peer-to-peer recommendation trust model, bases on the analysis of traditional PKI trust models and research status of distributed trust models in native and abroad, references to social relationships of real world, which based on reputation. Adopting distributed methods to manage trust avoids the dependent on center servers in centralized model. Combined with traditional encryption and digital signature methods and so on between peers'communications ensures their securities. In this trust model, we designs a trust query protocol, so that every entity can build trust relationships between peers through recommendations of its trustworthy recommenders, and gives algorithms to calculate trust values and to update. Simulated experiments and results analysis show that the success rate of transactions with the application of this trust model is obviously high than that of none trust model. And this model can segregate bad entities availably, preventing bad information's propagation. Lastly, we applies the trust model to P2P file share systems.The trust model designed in this paper based on trust mechanism and cryptography techniques, provides a scheme to build trust relationships between peers, and makes useful attempts to resolve secure problems existing in P2P networks,...