基于云模型的主观信任评估机制

Subjective trust evaluation mechanism based on cloud model

针对传统的网络安全手段不能有效解决云计算安全问题的现状,提出在云计算环境中建立主观信任评估模型的研究方案。介于主观信任的模糊性和不确定性的双重特征,引入定性定量转换模型-云模型理论刻画主观信任评估机制的演化过程,给出信任向量、信任云的定量描述。在此基础上定义实体信任云的概念,并设计实体信任云的计算,评估和更新的算法。实例分析和仿真结果表明了该主观信任评估模型的正确性和有效性。

Because the status that traditional network security tools can not be an effective solution to solve cloud computing security issues, the subjective trust evaluation model is proposed to establish the research scheme in the cloud computing environment. Taking into account the subjective trust＇s dual characteristics of the fuzziness and uncertainty, cloud model theory which can transform between qualitative and quantitative is used to depict the evolution of the subjective trust evaluation mechanism, trust vector and trust cloud are described quantitatively, the concept of the entity＇s trust cloud is defined and algorithms of calcu lating, assessing and updating the entity＇s trust cloud are designed. The example analysis and the results of simulation show the correctness and validity of the subjective trust evaluation mechanism.