A Dynamic Self-Adaptive Trust Model for P2P E-Commerce System

P2P e-commerce systems are commonly perceived as an environment offering both opportunities and threats. The existence of malicious peers could damage the correctness and availability of them. One way to minimize such threats is to use trust model to evaluate the trustworthiness of peers. This paper presents a dynamic self-adaptive trust model for p2p e-commerce system—AdaptTrust model, which involves in two kinds of trust, namely direct trust and global reputation. The direct trust from a peer to another peer is calculated based on transaction feedbacks between them. The global reputation of a peer is calculated based on trustworthiness ratings from rating peers to the reference peer. Finally, a series of experiments have been done to verify the effectiveness and resistibility of the proposed trust model.