Web服务中的信任和声誉评估模型

Trust and Reputation Evaluation Model in Web Services

对主观逻辑存在的一些问题进行分析和改进,并进一步提出一个基于主观逻辑的自适应Web服务信任模型iWSTrust。通过利用iWSTrust对Web服务环境的交易过程所涉及的实体间的各种信任关系进行详细的建模和推理,并区分不同类型的服务请求者,iWSTrust能够使实体的信任度和声誉随着交易经验的增加而自适应地改变,预测实体的未来行为,并对恶意欺骗的实体进行惩罚,从而更好地保护服务请求者和服务提供者的利益。模拟实验表明改进的主观逻辑能更好地建模信任关系和改善Web服务环境的安全性。

According to the problems existing in subjective logic,some analysis and improvements are made on subjective logic and an adaptive Web services trust model,iWSTrust,is proposed.By detailedly modeling and reasoning the trust relationships among entities encountered in the interaction processes in Web services environment,iWSTrust enables the credibility and reputation of entities to change adaptively with the increase of interaction experiences, predicts their coming behaviors and punishes those vicious entities,which as a result can protect the interests of service requesters and service providers. Simulation experiments show that the improved subjective logic can better model trust and enhance the security of Web services environment.