Based on the existing research about the classification of trust, the inaccuracy of trust classification for Web services was analyzed and a plan for classifying trust dynamically was put forward.From the view of rationality and flexibility of defining trust attributes, intuitionisfic fuzzy number was used to describe the trust signature.Inherent capability, security characteristic and reputation were considered as the main signatures to describe trust.Contribution degrees of inherent capability, security characteristic and reputation were calculated.Similarity matrix of trust intuitionistic fuzzy sets was constructed, and intuitionistic fuzzy equivalent matrix was got by calculating transitive closure.Trust classification was obtained by defining threshold cutting matrix.Validity and accuracy of dynamic classification were verified.%在已有的信任类型研究的基础上,分析了针对Web服务的信任分类的不准确性问题,提出了动态定义信任类别的方案.从定义Web服务的信任属性的合理性和灵活性角度出发,提出用直觉模糊数描述信任特征,考虑固有能力、安全特性和声誉三个方面的特征对信任的影响,并给出能力信任贡献度、安全信任贡献度和声誉信任贡献度的计算方法.构造了信任直觉模糊集的相似矩阵,由求传递闭包的方式得到直觉模糊等价矩阵,通过设定不同的阈值得到不同的阈值截矩阵,从而得到不同的分类结果.验证了动态定义信任类别的有效性和准确性.
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