Abstract: To address the problem of the cheating behaviors of those malicious peers in the P2P environment aiming to conduct attacks on a high trust value through a short period honest behavior, a trust vector based trust mechanism is proposed in this paper.The accuracy of trust evaluation is increased by the trust vector and the time window. Simulation results demonstrate that the new mechanism can effectively solve the cheating behaviors of those malicious peers compared with some available trust mechanisms.

Key words: P2P, trust mechanism, trust vector, time window