不确定性理论的信任建模研究综述

Survey of Trust Model Based on Uncertainty Theory

由于开放式网络环境具有模糊性、随机性和不确定性的特点,使用户在选择目标实体交互时面临了诸多风险.因此,设计有效的信任评估机制,在指导用户选择合适的交互对象、评估陌生实体、保障开放式计算系统的顺利运行等方面,具有重要的现实意义.归纳总结了信任关系的基本定义、主要特性和划分方法;讨论了信任建模的主要工作;根据采用的数学方法不同,深入分析了几类常见不确定性理论的信任建模方法,并选取典型的信任模型进行对比分析;最后探讨了现有研究中存在的问题,并展望了需要进一步研究的方向.

Duo to the open network environment has the characters of fuzziness, randomness and uncertainty, customers confront lots of secure issues when selecting totally unknown object entities. So,it is necessary to design an effective trust mechanism to help user se- lect appropriate object,evaluate unknown entities and ensure smooth running of the whole system. In this paper,firstly,the concepts, characteristics and classifications of trust relation are summarized and presented. Then, this paper presents the main works of trust eval- uation based on the uncertainty theory. Subsequently, several main trust evaluation models are described in detail. And the results of comparative of several typical models are presented. Finally,the current problems and research trends in this field are discussed.