一种基于HMM的P2P信任模型  

A Trust Model for P2P Based on Hidden Markov Model

作　　者：张国容[1] 殷保群[1] 

机构地区：[1]中国科学技术大学信息与科学技术学院自动化系

出　　处：《电子技术（上海）》2013年第8期48-51,共4页Electronic Technology

摘　　要：针对P2P网络中存在的安全问题,本文提出一种基于隐Markov模型(Hidden Markov Model,HMM)的P2P信任模型,采用HMM对节点行为进行建模,在此模型的基础上,利用节点交互结果作为观测历史,由前向-后向算法计算得到节点行为概率分布,作为节点的信任值评估。考虑到信任评估实时性的需求,文章还提出了一种基于滑动窗口和遗忘因子的模型更新算法。Aiming at the P2P networks security issues, this paper proposes the HMM-based P2P trust model, uses HMM to model the behavior of the peer. On the basis of this model, peer interaction result is used as the observation history. The probability distribution of peer behavior evaluated as trust can be calculated by HMM forward-backward algorithm. In consideration of the real time demand of trust evaluation, we proposes a model updating algorithm based on sliding window and forgetting factor.

关 键 词：P2P网络 信任模型 隐MARKOV模型 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]