Abstract:

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.

Key words: nonfunctional property;trust;Web service discovery