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dc.contributor.authorMalik, Zakien_US
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 providerâ 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_US
dc.publisherVirginia Techen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectWeb Servicesen_US
dc.subjectService-Oriented Environmentsen_US
dc.titleReputation-based Trust Framework for Service Oriented Environmentsen_US
dc.contributor.departmentComputer Scienceen_US
dc.description.degreePh. D.en_US D.en_US Polytechnic Institute and State Universityen_US Scienceen_US
dc.contributor.committeechairGracanin, Denisen_US
dc.contributor.committeememberLu, Chang-Tienen_US
dc.contributor.committeememberBohner, Shawn A.en_US
dc.contributor.committeememberBarkhi, Rezaen_US
dc.contributor.committeecochairBouguettaya, Athmanen_US

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