a classication scheme for trust

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1、AClassicationSchemeforTrustFunctionsinReputation-BasedTrustManagementQingZhang,TingYu,andKeithIrwinDepartmentofComputerScienceNorthCarolinaStateUniversity
qzhang4,tyu,kirwin@ncsu.eduAbstract.Reputationisanimportantmeanstoestablishtrustindecentralize

2、denvi-ronmentssuchastheSemanticWeb.Inreputation-basedtrustmanagement,anen-tity'sreputationisusuallybuiltonfeedbackfromthosewhohavedirectinteractionswiththeentity.Atrustfunctionisusedtoinferone'strustworthinessbasedonsuchfeedback.Manytrustfunctionshavebee

3、nproposedintheliterature.Theyaretyp-icallydesignedforspecicapplicationdomains,thusdifferinavarietyofaspects,includingtrustinferencemethodologies,complexityandaccuracy.Inthispaper,weproposeaclassicationschemefortrustfunctions,whichwillhelpthesystematica

4、nalysisandselectionoftrustfunctionsforparticularapplications.1IntroductionTheSemanticWebisvisionedasthenextWeb.Byinstillingsemanticsinto”at”docu-ments,theSemanticWebenablesuserstoretrieveinformationthatsatisesqueriesmuchmorecomplexandexpressivethantoda

5、y'skeyword-basedqueries.DuetothedecentralizednatureoftheSemanticWeb,anentitycanpublishwhateverin-formationwithoutgoingthroughanyscrutiny.Thoughseeminglyrelevantinformationcanberetrieved,thereisnoassuranceofitsusefulnessandcorrectness.Cryptographictech-ni

6、quesmaybeusedtoprotectinformationcondentialityandintegrity,butnotitsquality.Tomitigatetheproblem,thetrustworthinessofinformationsourcesneedstobeconsidered.Reputationisanimportantmeanstoestablishtrustindecentralizedenvironments.Anentity'sreputationisusua

7、llybuiltonfeedbackfromthosewhohavedirectinteractionswiththeentity.Givenasetoffeedback,one'strustworthinesscanbeinferredthroughtheuseoftrustfunctions.Trustfunctionshaveadirectimpactonone'sdecisionregardinginformationcollectionandothercriticaltasks,andisak

8、eycomponenttoanyreputation-basedtrustmodel.Manytrustfunctionshavebeenproposed,targetingatdifferentapplicationdomains.Theydifferinavarietyofaspects,includingtrustinferencemethodologies,complexityandaccuracy.Whenauseroragrou