关键词: P2P网络, 信任模型, 安全, 近期表现

Abstract: This article proposes a novel trust models based on the recent behavior of peers to solve the problem of the large computation and dynamics in the existing trust model.The recent fail ratio of one peer records its recent state.The reputation of one malicious peer will fall to 0，when the node has vicious behavior，then the course of accumulated the trust will become slow.The response of the system changes fast，because it adopts the posterior method and cuts down the computations before the transaction.Theoretical analysis and simulation show that the models use the trust of dynamic computation，and meet the order of small computation，prevent the mutual behavior efficiently.

Key words: peer-to-peer, trust model, security, recent behavior