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1、ATrust-BasedReputationSysteminPeer-to-PeerGrid1,21211ZenggangXiong,YangYang,XueminZhang,DairongYu,andLiLiu1SchoolofInformationEngineering,UniversityofScienceandTechnologyBeijing,China2DepartmentofComputerScience,XiaoganUniversity,Chinajkxxzg@163.comAbstract.G
2、ridcomputingandpeer-to-peercomputingarebothhottopicsatpresent.Theconvergenceofthetwosystemsisincreasinglyvisible,andOGSAprovidesaframeworkforintegratinggridandpeertopeer.However,managingtrustisakeyissueforpeer-to-peergrid.Thispaperproposesanoveltrust-basedrep
3、utationsystemforpeer-to-peergrid,whichisbasedonBayesiantheory.Theoreticalanalysisandsimulationsprovethatthetrust-basedreputationsysteminpeer-to-peergridcanimprovetheperformanceofcooperationamongGridpeers.1IntroductionDuringthepastseveraldecades,theprocessings
4、peedofacomputerhasexponentiallyincreasedoveronemilliontimes.Apersonalcomputertodayismorepowerfulthanasupercomputertenyearsago.However,today’scomputer,eventhesupercomputer,stillcannotsatisfytheincreasingneedoflifesciences,physicsetc.Therefore,thegridcomputinga
5、ndpeer-to-peercomputingobtaindevelopmentgradually.Atpresent,gridandpeer-to-peerarebothhottopicsrespectively.However,theconvergenceofthetwosystemsisincreasinglyvisible:thetworesearchcommunitiesstartedtoacknowledgeeachotherbyformingmultipleresearchgroupsthatstu
6、dythepotentiallessonsthatexchanged.P2Presearchfocusesmoreandmoreonprovidinginfrastructureanddiversifyingthesetofapplications;Gridresearchisstartingtopayparticularattentiontoincreasingscalability[1][2].Uptonow,manygridmodelshavebeenproposed,whicharebasedonpeer
7、-to-peertechnology[3][4][5].Thesepeer-to-peergridmodelsimprovetheperformanceofthetraditionalgridsuchasscalability,autonomyanddynamic.However,newchallengesinpeer-to-peergridtakeplace.Managingtrustisakeyissueforpeer-to-peergrid,especiallyamongGridpeers.Toaddres
8、sthetrustprobleminthepeer-to-peergridenvironment,thispaperproposesatrust-basedreputationsystem.Therestofthispaperisorganizedasfollows.Insection2,wemakeabriefsurveyontherelatedworks.Sectio
