基于云模型的服务信任模型

针对Web服务中信任的主观性和不确定性等特点，提出一种基于云模型的信任建模方法，并给出了直接信任云、推荐信任云、综合信任云的计算方法及基于时间权重的信任更新算法．同时，该模型运用具体的服务能力评价信息来量化服务的信任度，增强了模型的客观性，使其能较好地量化实体的真实信任水平，提高网络中实体的交互成功率．实验与分析结果表明，该模型在网络环境中具有较好的效果．

Service Trust Model Based on Cloud Model

Be aimed at the characteristics of subjectivity and uncertainty of trust in the Web service, a trust modeling method based on the cloud theory was proposed. The calculation methods of direct trust cloud, recommendation trust cloud, comprehensive trust cloud and the update algorithm of trust based on the weight of time was also presented. Meanwhile, this model use the information of the service capacity that resources could achieve to quantify the trust of service, which enhances the objectivity of model. It can evaluate the real level of trust and increase the interaction success rate of entity. The experiment and analysis results show that the cloud-based trust model proposed performs well in network.