一种基于信任的Web服务发现方法

在面向服务的环境下,由于Web服务本身的动态性和网络环境的不确定性,致使用户很难获得可信的高质量服务。当前基于反馈信息的信任评估方法没有考虑恶意评估对服务可信程度的影响,本文通过加入客观评价对此进行了修正,并提出一种从服务的能力、稳定性和声誉三方面来建立的Web服务信任模型,提升了信任评估的准确度。在此基础上提出一种可信的Web服务发现框架,通过服务交易历史信息获取比较客观的信任属性,同时结合非功能属性进行服务的综合评估,利用熵值法来确定其中各非功能属性的权重,从而发现满足用户需求的可信服务。仿真结果表明,该方法是可行和有效的。

A Trust-Based Web Service Discovery Method

In the service-oriented environment,the dynamic nature of Web service and the uncertainty of network environment make it difficult for the user to obtain high-quality and reliable services.Currently,the feedback-based trust evaluation method does not take into account the impact of the trustworthiness of the service by Malicious Assessment.The paper amends the method through adding objective assessment and puts forward a trust model to measure the trust of Web services from three attributes: ability,stability and reputation to improve the accuracy of the assessment.On this basis,this paper provides a discovering framework of Web service,which,by acquiring objective trust attributes through historical transaction information and through comprehensive assessment in connection with non-functional attributes,determines the weight by the entropy method and discoveres a trustable service satisfying customers' demands.The simulation experimental results show the feasibility and effectiveness of the proposed method.