Reputation-based Trust Framework for Service Oriented Environments

dc.contributor.authorMalik, Zakien
dc.contributor.committeechairGracanin, Denisen
dc.contributor.committeecochairBouguettaya, Athmanen
dc.contributor.committeememberLu, Chang-Tienen
dc.contributor.committeememberBohner, Shawn A.en
dc.contributor.committeememberBarkhi, Rezaen
dc.contributor.departmentComputer Scienceen
dc.description.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.en
dc.description.degreePh. D.en
dc.publisherVirginia Techen
dc.rightsIn Copyrighten
dc.subjectWeb Servicesen
dc.subjectService-Oriented Environmentsen
dc.titleReputation-based Trust Framework for Service Oriented Environmentsen
dc.typeDissertationen Scienceen Polytechnic Institute and State Universityen D.en