Abstract: To improve the computational efficiency and practicability,based on analyzing the characteristics of cloud manufacturing system as well as the advantages and disadvantages of trust based existing access control model,a multi-attribute fuzzy trust access control scheme for cloud manufacturing system was proposed.The proposed scheme introduced dynamic hierarchical fuzzy system in which the relevant attributes were layered when evaluating trust of cloud manufacturing system.Meanwhile,the scheme integrated subject trust with third party export group trust in the process of trust evaluation.Under the special application background of multiple fuzzy input attributes,the dimension disaster problem of single fuzzy system and the traditional hierarchical fuzzy system's rule configuration dependency on experts were avoided effectively by introducing dynamic hierarchical fuzzy system,and the amount of calculation and complexity were reduced greatly.Experiment results showed that this scheme could realize dynamic,fine-grained,efficient access control for the cloud manufacturing system.

Key words: cloud manufacturing, multi-attribute, hierarchical fuzzy system, trust evaluation, access control

摘要： 为提高云制造系统下信任评估的计算效率和实用性,在分析云制造系统的特点以及现有基于信任的访问控制模型优缺点的基础上,将动态层次模糊系统和信任评估相结合,提出一个适用于云制造环境的基于多属性模糊信任评估的访问控制方案,并给出了具体的方案流程。该方案将云制造环境中与信任相关的属性进行分层,引入第三方专家组的信任评估,将主观信任和客观信任融入信任评估过程。为了适应多模糊属性输入的特殊应用背景,通过引入动态层次模糊系统,有效避免了单一模糊系统的维数灾难问题以及传统层次模糊系统对专家配置规则的依赖问题,大大降低了系统的计算量和复杂度。实验表明,该方案实现了云制造环境下动态、细粒度、高效的访问控制。

关键词: 云制造, 多属性, 层次模糊系统, 信任评估, 访问控制