一种基于名誉的P2P网络信任管理模型

由于P2P系统的开放、匿名等特点，节点间的信任关系往往很难通过客观的信任关系建立。本文构建了一种基于实体间交易历史和推荐的信任模型，提出了依据历史交易记录来计算直接信任值的方法，定义了信任推荐和信任聚合两种运算，运用分布式哈希表来处理信任值的存储和查询，并给出了信任咨询和更新的算法。实验表明，该模型可以提供较可靠的信任推荐服务，同时能较好地消除诋毁、恶意推荐等安全问题。

A Reputation-Based Peer-to-Peer Trust Managment Model

The features of peer-to-peer systems such as user anonymity and openness make it hard to establish the trust among participants by the objective trust mechanism. This paper sets up a trust model based on bartering history and recornmendation. At first, a new method to convert the historical bartering score to the direct trust value is proposed,and then we define two operations of trust recommendation and trust coalition. Finally,we give an algorithm of trust query and updating based on distributed hash tables. Analyses and simulations show that the system can provide a recommendation service robustly, and eliminate the secure problems such as slandering, venomous recommendation.