资源描述：
《cumulative reputation systems for peer-to-peer content distribution》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、1CumulativeReputationSystemsforPeer-to-PeerContentDistributionB.Mortazavi∗andG.KesidisCS&EandEEDeptsThePennsylvaniaStateUniversityUniversityPark,PA,16802mortazav@cse.psu.eduandkesidis@engr.psu.edu∗alsoamemberoftechnicalstaffatVerizonWirelessAbstract—Reputationsystemscanbeusedtoprovi
2、dein-whenbiddingonorsellingmerchandise.Bothimprovingcentivesforcooperationamongparticipantsofpeer-to-peerperformanceandreducingimplementationcostsofreputationnetworks.Inthispaper,asurveyofsuchsystemsisfirstprovided.systemsarechallengingtypicallybecauseofthescaleandWethenfocusonconten
3、tdistributionnetworksthathavehonestdistributednatureofthenetworksinwhichtheyaredeployed.butrationallyselfishusers.Areputationframeworkisproposedthat,forspecialcases,canbeprovedtoconvergeinmeantoPerformanceissuesincluderobustnessinthepresenceof“reveal”thetruepropensityofpeernodestocoo
4、perate.Basedmaliciousandselfishusers(actingaloneorwithcollusionwithonthisframeworkagameisdesignedinwhichusersplaytoothers)targetthereputationsystemitselfby,e.g.,lyingaboutmaximizethefilesreceivedfromthesystembyadjustingtheir2theirownreputationorthatofotherswhenpolled(suchascooperation
5、levelandgainingabetterreputationasaresult.badmouthing).Adetaileddescriptionofdifferentattacksonreputationsystemscanbefoundin[23].Ingeneral,ifnoin-I.INTRODUCTIONcentivesforcooperationarepresent,theexistenceofrationallyselfishuserswilldiminishtheperformanceoftheP2PsystemPeer-to-peer(P2
6、P)overlaysystemshavebeenproposedto[20].Incentivesaretypicallycumulativeinnatureinthatsus-addressavarietyofproblemsandenablenewapplications.Thetainedcooperationonatransaction-by-transactionbasisyieldsattractionofthesesystems,whencomparedtoclient/serversignificantrewards.Theserewardsma
7、ybeexplicitlyfinancialframeworks,isintheirrobustness,reliabilityandcostef-(asinthecaseofmicropayments[32],[43])orreputationalficiency.Theyhavebeenproposedtofeasiblyimplementinnaturewherereputations,insomecases,mayhaveimplicitnewnetworkprotocols,e.g.,routing[17],[27](BGP),DNS,financiala
8、ssociationssuchasin
