Research of P2P Network Trust Model

In the P2P network, trust model can reduce the influence of malicious nodes effectively. Eigen Trust is one of the most authoritative trust model. This model is mainly applied to the P2P file sharing system which is the theoretical basis of many trust model. It was improved in different aspects for enhancing the model´s performance. The model use service trust value to indicate node´s recommendation trust, which failed to prevent a node that has high service trust value and provides malicious recommendation. For this question, this paper proposes a trust model Based on the recommendation trust. It can prevent a node with higher service trust value to defame a normal node by distinguish between the service trust value and recommendation trust value. On the other hand, we add access control mechanism into our system to limit the node´s access permission which do not sharing file actively. The simulation results show that this model can significantly increase the number of satisfactory transactions.