P2P系统的信任研究

由于P2P系统的开放、匿名等特点,使得P2P系统对节点缺乏约束机制,节点间缺乏信任。针对以上问题,本文提出了一种新的P2P系统信任模型,该模型根据系统中节点的历史交易情况和系统中其它节点的推荐计算节点的信任度,节点根据计算的结果决定是否进行交易。仿真试验及分析表明,该模型能有效地评估节点的信任度,隔离恶意节点,提高下载成功率。

Study on Reputation in P2P System

Trust is a problem of particular importance in peer-to-peer system. However, the feature of the peer-to- peer system such as user anonymity, open nature makes that peers are not responsible for their irresponsible bartering history. This paper describes an algorithm to assess the peer which provides service based on the behavior of the peer. According bartering history and other peers recommend, the peer decides to download the sharing file from which peers. Analyses and simulations show that the model can assess the peer's reputation effectively, discard the mali- cious peer from peer-to-peer system and improve the rate of successful download greatly.