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1、AFreshLookatTrustandReputationSystemsChristopherJ.Hazardcjhazard@ncsu.eduNorthCarolinaStateUniversityFebruary13,2009Trust&ReputationIWhatisTrust?IpresumptionoffulfilledactionIassuredrelianceofcharacter,ability,strength,ortruth(Merriam-Webster)IWhatisReputation?IBeliefthatsomethingisacertainwayFebruar
2、y13,2009ChristopherJ.Hazard,NorthCarolinaStateUniversity2OnComputationalTrust...I“Nevertrustacomputeryoucan’tthrowoutawindow.”-SteveWozniakFebruary13,2009ChristopherJ.Hazard,NorthCarolinaStateUniversity3TrustWithinAutonomousAgentsIManyapplicationsIautomatedprocurement,webservices,recommendersystems,
3、personalassistantagentsITrustresearchspansdisciplinesIWillyoubuyfoodfromcompanyX?IAreyoutellingthetruth?IEvenwithinComputerScienceINocommondefinitionINocommonmetricstocompareonesystemtoanotherINocommoncriteriaordesiderataFebruary13,2009ChristopherJ.Hazard,NorthCarolinaStateUniversity4Contribution:IAs
4、etofcommondimensionstocategorizetrustsystemsIAsetofcommondesiderataforbuildingtrustsystemsIAsetofcommonmetricstocomparetrustsystemsIResultscomparing5widelycitedmodels,andonenewmodel...February13,2009ChristopherJ.Hazard,NorthCarolinaStateUniversity5OutlineTrustSystemClassificationDesiderataforTrustSys
5、temsTrustSystemMetricsPerformanceComparisonConclusionFebruary13,2009ChristopherJ.Hazard,NorthCarolinaStateUniversity6TrustMeta-SurveyIRamchurnHuynhJennings’04(RHJ)IArtzGil’07(AG)ISabaterSierra’05(SS)IJøsangIsmailBoyd’07(JIB)IDellarocas’06(D)IMuiHalberstadtMohtashemi’02(MHM)ICommonalitiesbetweensurve
6、ysFebruary13,2009ChristopherJ.Hazard,NorthCarolinaStateUniversity7CommonDimensionsOverviewIIncentiveCompatibility(RHJ,D)IAccessvAction(RHJ,AG,JIB)IFocusonAdverseSelection(SS,JIB,D,RHJ)IFocusonMoralHazard(SS,JIB,D,RHJ)IContextDependency(SS,JIB,MHMAG)IAggregationBreadth(RHJ,JIB,MHM,AG,D)February13,200
7、9ChristopherJ.Hazard,NorthCarolinaStateUniversity8Dimension:IncentiveCompatibilityIIncentivecompatibility:honestyisrationalIIfreputationisprimarymechanism,thenusuallyno.Ie.g.eBayIIfincentivecompatible
