Abstract: With the research of large scale distributed systems, the dynamic trust management of open network environment has become a prominent problem. By analyzing the characteristics of trust relationship in the dynamic environment, this paper gives a dynamic trust evaluation model of distributed environment with fuzzy logic knowledge. This model considers the ambiguity and subjectivity of trust, using fuzzy logic method to get the direct trust value of nodes. To control the calculation efficiency of the global reputation, this model increases a recommendation node information table in this model.

Key words: open network, trust relationship, trust value, reputation, fuzzy logic

摘要： 随着大规模分布式系统研究的深入，开放网络环境下的动态信任管理成为一个突出问题，通过分析动态环境信任关系的特点，借助模糊逻辑知识，给出了一个分布环境的动态信任评估模型。该模型充分考虑了信任的模糊性与主观性，运用模糊逻辑的方法来得到结点的直接信任值，同时对动态环境下全局信誉的迭代计算，通过增加推荐结点信息表来控制其计算效率。

关键词: 开放网络, 信任关系, 信任值, 信誉, 模糊逻辑