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1、TrustNetworkAnalysiswithSubjectiveLogicAudunJøsang1RossHayward1SimonPope21SchoolofSoftwareEngineeringandDataCommunicationsQueenslandUniversityofTechnology,Brisbane,AustraliaEmail:fa.josang,r.haywardg@qut.edu.au2CRCforEnterpriseDistributedSystemsTechnology(DSTCPtyLtd)yTheUniversit
2、yofQueensland,Brisbane,AustraliaEmail:skjpope@gmail.comAbstracttheWS-Trustspecications[26],andtrustbetweenbusi-nesspartnersregardingsecurityassertionsasdescribedinTrustnetworksconsistoftransitivetrustrelationshipstheLibertyAllianceFramework[18,19].Trustalsoap-betweenpeople,organi
3、sationsandsoftwareagentscon-pliestothehonesty,reputationandreliabilityofservicenectedthroughamediumforcommunicationandinter-providersortransactionpartners,ingeneralorforaspe-action.Byformalisingtrustrelationships,e.g.asrep-cicpurpose.Inthiscontext,theprocessofassessingtrustutatio
4、nscoresorassubjectivetrustmeasures,trustbe-becomespartofqualityofservice(QoS)evaluation,deci-tweenpartieswithinthecommunitycanbederivedbysionmakingandriskanalysis.analysingthetrustpathslinkingthepartiestogether.ThisBeingabletoformallyexpressandreasonwiththesearticledescribesametho
5、dfortrustnetworkanalysisusingtypesoftrustisneedednotonlytocreatesubstitutesforsubjectivelogic(TNA-SL).Itprovidesasimplenotationthemethodsweuseinthephysicalworld,likeforinstanceforexpressingtransitivetrustrelationships,anddenestrustbasedonexperiencesortrustinroles,butalsoforcre-am
6、ethodforsimplifyingcomplextrustnetworkssothatatingentirelynewmethodsfordeterminingtrustthataretheycanbeexpressedinaconciseformandbecomputa-bettersuitedforcomputerisedinteractions.Thiswillfacil-tionallyanalysed.Trustmeasuresareexpressedasbeliefs,itatethecreationofcommunicationinfra
7、structureswhereandsubjectivelogicisusedtocomputetrustbetweenar-trustcanthriveinordertoensuremeaningfulandmutuallybitrarypartiesinthenetwork.WeshowthatTNA-SLisbenecialinteractionsbetweenplayers.efcient,andillustratepossibleapplicationswithexam-Themaincontributionofthispaperisamet
8、hodforples.discoveringtrustnetwor