一种具有时间衰减和主观预期的P2P网络信任管理模型

A New Trust Management Model for P2P Network with Time Self-Decay and Subjective Expect

该文提出了一种基于信誉的P2P网络信任管理模型。在P2P网络中,由于不存在中心节点,需要根据节点的行为来判断其是否可信。通过引入时间衰减算法,解决了对行为评估,本地信任值以及推荐的时间相关性问题。通过对近期表现和长期表现的对比,给出对该节点未来表现的主观预期,能够对节点异动做出反应。利用DHT资源发现算法,有效地降低了网络消耗,并使模型具有可扩展性。模型能够有效地提高P2P网络的交易成功率。

This paper presents a novel decentralized trust management model with reputation.In P2P（peer to peer） network,there is no trusted authority.Trust relations between peers should be established with peer＇s behaviors.There are three main contributions in this paper.Towards utilizing time self-decay function,the time-related problem is resolved.Also through comparing the nearly scores and general scores,the problem of servent＇s subjective expect can be resolved.After using the DHTs,bandwidth cost can be reduced and salability can be obtained.This model can promote the business succeed rate in P2P network efficiently.