论文部分内容阅读
针对现有的信任评估模型中存在的共谋问题,提出一种基于博弈论的、具有激励机制的Web服务信任评估模型.该模型通过收集用户对Web服务的交互满意度累积服务的信任值,对Web服务的策略进行分析,利用博弈论的方法建立合理的信任评估机制,模型充分考虑了用户的行为对评估结果的影响,并通过对恶意服务的信任值进行合理的调整实现惩罚奖励措施,克服了传统模型中对不同信任度的服务进行惩罚时粒度不合理的缺陷,并由博弈过程推导出的纳什均衡的存在性和最优性说明了模型的合理性.实验结果表明,该模型能够有效的抵制共谋行为,提高用户参与信任评估的积极性,改善Web服务的运行环境.
Aiming at the problem of collusion existing in the existing trust evaluation model, a trust evaluation model of Web service with incentive mechanism based on game theory is proposed.This model accumulates trust value of service by accumulating user’s satisfaction with Web service, This paper analyzes the strategy of Web service and builds a reasonable trust evaluation mechanism by using game theory. The model fully considers the influence of user’s behavior on the evaluation result, and implements penalty rewards by reasonably adjusting the trust value of malicious service. It overcomes the defect of the unreasonable granularity when punishing service with different trust in the traditional model and the existence and optimality of Nash equilibrium derived from the game process illustrate the rationality of the model.Experimental results show that the model can Effectively counteract complicity, improve the enthusiasm of users to participate in the assessment of trust and improve the operating environment of Web services.