关键词: P2P网络 直接信任值 推荐信任值 全局信誉值 诋毁 哈希表

Abstract:

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 trustmechanism. 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 robustl y, and eliminate the secure problems such as slandering, venomous recommendation.

Key words: P2P network;direct trust;recommendation trust;global trust;slandering;hash table