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1、March31,2005TrustedP2PTransactionswith∗FuzzyReputationAggregationShanshanSong,KaiHwang,RunfangZhou,andYu-KwongKwokUniversityofSouthernCalifornia________________________________________Internetcommerceisfacingaproblemofdistrustamongparticipatingsellersandbuyers.Thisa
2、rticlepresentsanewfuzzy-logicapproachtoaggregatingpeerreputationusingpublic-domaintracedata.BasedontheanalysisandsimulationexperimentsovertheeBaytrace,theauthorsdemonstratetheefficacyandrobustnessoftheeTrustandEigenTrustreputationsystemstofacilitatetrustedP2Ptransac
3、tions.__________________________________TheInternethasenablede-commerceore-auctionbasedcommodityexchangesamongstrangersthroughouttheworld.Internetcommerceiswideopeninthateachparticipantcansignonandoffasynchronouslyatwill[7].Thee-transactionismostlyconductedatapeer-t
4、o-peer(P2P)level.TheP2Penvironmentdoesnotinvolveacentralentitytomediatetheexchanges.TheP2Ptransactionscanbecarriedoutpoint-to-pointorpoint-to-multipoint,anonymously.Thus,itiscrucialtohaveaneffectivetrustmanagementsystembasedonpeerreputations.Thissystemmustbebuiltwit
5、hpublic-domaine-commercedatasuchastheeBaytracefile,whichallowsparticipantstolocatetrustworthypartnerstoexchangecommodityovertheInternet.∗ManuscriptsubmittedtotheIEEEInternetComputingMagazineSpecialIssueonSecurityforP2PandAdHocNetworksonApril1,2005.Allrightsreservedb
6、ytheauthors.Correspondingauthor:KaiHwang,USCInternetandGridComputingLab,3740McClintockAvenue,EEB-212,LosAngeles,CA90089-2562.E-mail:kaihwang@usc.edu,Tel.:(213)740-4470.-1-March31,2005P2PReputationSystemfore-TransactionsFigure1showsthedesiredcomponentsofareputationsy
7、steminanInternetcommerceenvironment.Eachofthefourapplicationsatthetopreliesonareputationevaluationanddisseminationsystemtobindthesellersandbuyerstogether.P2PTransactionApplications:Inconsumerproductexchanges,abuyerwouldliketoknowthereputationofasellerbeforecommittin
8、gthepaymentofthedesiredgoods.Inafilesharingapplication,thedownloadingpeerwouldliketogetfilesfromatrustedpeer,lestthefilesgotmaybeinfectedb
