The Trust Model Based on Punish Mechanism in Peer-to-Peer Network

Along with the rapid development of peer-to-peer network technology and the fast increasing number of users, the problems of security in peer-to-peer network is becoming more and more important. By researching the previous trust model of peer-to-peer network, we propose a trust model(PTM) for peer-to-peer networks based on punish mechanism. Firstly, we use the method of social grouping nodes in the calculation model of trust. Then bring in punish mechanism in trust model. This model can stimulate nodes which provide sincere reliable service.