Type of Document Dissertation Author Malik, Zaki Author's Email Address firstname.lastname@example.org URN etd-11112008-115537 Title Reputation-based Trust Framework for Service Oriented Environments Degree PhD Department Computer Science Advisory Committee
Advisor Name Title Gracanin, Denis Committee Chair Bouguettaya, Athman Committee Co-Chair Barkhi, Reza Committee Member Bohner, Shawn A. Committee Member Lu, Chang-Tien Committee Member Keywords
- Web Services
- Service-Oriented Environments
Date of Defense 2008-10-24 Availability restricted AbstractWe investigate the problem of establishing trust in service-oriented environments. We focus
on providing a reputation framework that would enable trust-based interactions with and
amongst Web services. We define methods for the creation of reputation information, its
collection, and assessment that are robust in the face of a variety of attacks. Our framework
(denoted RATEWeb) supports a cooperative model in which Web services share their experiences of the service providers with their peers through feedback ratings. The different ratings are aggregated to derive a service provider’s reputation. This in turn is used to evaluate trust. For situations where rater feedbacks are scarce, we use statistical forecasting (particularly, a Hidden Markov Model) to ascertain trust. The approaches and techniques
developed under the RATEWeb framework facilitate the optimal selection and/or composition of Web services based on service reputations. We conduct an extensive performance study (analytical and experimental) to assess the fairness and accuracy of the proposed techniques.
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