关键词: P2P网络, 综合信任模型, 时间序列, 人类信任关系, 直接信任, 间接信任

Abstract: P2P network has the characteristics of dynamic, self-organization and anonymity, which leads to the existence of malicious behavior of some nodes in the network. In order to ensure that the node can provide reliable resources and good service, this paper proposes a P2P network trust model based on time series, building trust relationship between peers. This trust model introduces a time decay function when calculating the direct trust and indirect trust, and the recent trust value is small, which has great influence on the overall trust degree. The trust value of cluster head nodes and cluster nodes are updated intime using feedback control mechanism, so that the value of the overall trust has timeliness, the evaluation of node trust is more accurate and more reliable. The experiment proves that this trust model can provide safeguard and improve credibility to P2P Network because it has better dynamic self-adaptability, and better ability to check the malicious peers than DyTrust.

Key words: P2P network, comprehensive trust model, time series, human trust relationship, direct trust, indirect trust