The trust cloud and trust grade cloud were described quantificationally,the process of calculation,synthesis and comprehen-sive operation for the trust evaluation cloud was presented,and the evaluation of trust grade was also presented.
根据主观信任的主观性、模糊性和随机性等特点,引入隶属云模型理论对信任进行建模,给出了信任云和信任等级云的定量描述,提出了信任评价云的计算、合成、综合运算和主体信任等级的评估。