新型P2P网络信任模型

P2P system lacks of effective mechanism in terms of peers because of its open nature and user anonymity, so we could not evaluate its peer trust efficiently, and then the system’s trust will be weak caused by the possible cheating peers. In order to resolve the security problems, a network trust model based on subjective logic theory (created by )could be a better solution. The model is to ensure trust degree’s appropriate value by calculating its weighed average and variance. Furthermore, the model make sure of the trusted proportion among the uncertain, what’s more risk mechanism is introduced at the base of trust model. With the help of all the processes, the trust model can prevent cooperation cheat and imputation to some degree. Simulation analysis shows it is effective to resolve the security risk exist in P2P network.