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1、DIFFERENTIATEDADMISSIONFORPEER-TO-PEERSYSTEMS:INCENTIVIZINGPEERSTOCONTRIBUTETHEIRRESOURCES12H.T.KungandChun-HsinWu12HarvardUniversityAcademiaSinicaDivisionofEngineeringandAppliedSciencesInstituteofInformationScienceCambridge,Massachusetts,USATaiwan,ROCAbstract•
2、Adistributedtrust-enhancementschemethatusesthird-partynodestomanageandstorecreditsrequiredbyApeer-to-peer(P2P)systemwillstarvefromresourcesifreputationcomputations.everyuserisafreeloaderwhoonlytakesresourcesfromthesystembutnevercontributesany.Itisusefultode-vel
3、opaschemethatcanincentivizeuserstocontributere-2Eigenvector-basedReputationSystemsourcessuchascontent,CPU,storageandnetworkband-Wegiveabriefoverviewoftheeigenvector-basedreputa-width.Thispaperdescribesanadmissioncontrolsystemtionsystemusedinouradmissioncontrol.
4、Wewillusethecapableofprovidingdifferentiatedservicestousersbasedformulationsandnotationsintroducedinthissectionontheirpastcontributionsorreputations.Auserdesiringathroughoutthispaper.certainlevelofservicewillneedtomakeacomparablelevelofcontributionstotheP2Psyst
5、em.TheadmissionWeconsideraP2Psystemforprovidingcontentservice.systemusesadistributedeigenvector-basedmethodtoDenotethenodesintheP2PsystemasP1,…,Pn.Wede-computeuserreputations,asamplingheuristictoreducefineatransactionasthetransportofapieceofcontentcomputationan
6、dcommunicationcosts,andadistributedfromanodetoanother,possiblythroughsomeothertrust-enhancementschemetoprovidesystemsecurity.intermediatenodes.(a)Transactionpaths1IntroductionP1Awell-knownissueinP2Psystemsconcernsthefaircon-P8P2tributionofresourcesbyparticipati
7、ngusers(see,e.g.,[1],(c)Eigenvector-basedrankings[2]).Inparticular,itisimportanttoavoidthesituationthatPP37ServiceUsagenoneoftheuserswillcontributeresources.Inthispaper,ReputationReputationwepresentanadmissionsystemaimedatsolvingthisfreeP6P4P174ridingproblemand
8、demonstratesimulationresults.P5P254P343(b)ServicecreditmatrixTheadmissionsystemembodiesfivemainideas:P1P2P3P4P5P6P7P8P422P81P1001100005•Areputation-based,differentiatedadmis
