Abstract: This paper extends the subjective logic and develops a new trust and reputation evaluation model in P2P network. Considering to the history effect, it defines the mapping relationship and function between the evidence space and the opinion space again and a definition of risk is presented. Experimental results show that the trust relationships between peers can be evaluated more precisely, and security problems exist in P2P network also can be resolved more effectively.

Key words: subjective trust, trust model, reputation

摘要： 针对P2P应用环境，扩展主观逻辑，提出一种P2P网络的新型信任和信誉评估模型。考虑到历史遗忘效应，重新定义事实空间与观念空间之间的映射关系和映射函数。在信任的计算中引入风险机制，防止协同作弊和诋毁的安全隐患。实验结果表明，该信任模型能更精确地评估节点的信任度，可有效解决P2P网络环境中存在的安全问题。

关键词: 主观信任, 信任模型, 信誉

CLC Number: 

• TP393.08