Research On Trust Negotiation Related Key Technologies In P2P Net System

With the popularization of computers and the rapid development of the Internet,the progress of the interconnection of science and technology, the cost of the networkterminal is gradually decreased, and the computing power and the storage capacity andthe network bandwidth rapid growth, all of this have provide the basis of thePeer-to-Peer(referred to as P2P) network. The applications based on the technology ofthe P2P network are becoming more and more. With the high_speed network ofinformation sharing and delivering, people can easily to access the resource they needby various means.The traditional network such as client/server and browser/server networks alwaysput the important information resources and services on the central computer of the net,the client requests resources and services to the central server of the net. P2P networkhas broken the traditional network down. The changes in business strategies of such anetwork makes a lot of traditional software systems, techniques and strategies ofidentity and certificate-based security are no longer applicable or not a good solution todeserve the security issues which brought by the P2P networks.In this thesis, by introducing the definition of the P2P networks, the security ofinformation sharing in the P2P networks and the timely communication ande-commerce and other business, analysis the existing network model in P2Pnetworks,by comparing the advantages and disadvantages of network trust model proposed abest_effort type of trust negotiation policy model, analyzed the best_effort type of trustnegotiation policy models’ completeness and effectiveness.