资源描述：
《a fine-grained reputation system for reliable service selection in peer-to-peer networks》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、1134IEEETRANSACTIONSONPARALLELANDDISTRIBUTEDSYSTEMS,VOL.18,NO.8,AUGUST2007AFine-GrainedReputationSystemforReliableServiceSelectioninPeer-to-PeerNetworksYanchaoZhang,Member,IEEE,andYuguangFang,SeniorMember,IEEEAbstract—Distributedpeer-to-peer(P2P)applicationshavebeengainingmome
2、ntumrecently.Insuchapplications,allparticipantsareequalpeerssimultaneouslyfunctioningasbothclientsandserverstoeachother.Afundamentalproblemis,therefore,howtoselectreliableserversfromavastcandidatepool.Toanswerthisimportantopenquestion,wepresentanovelreputationsystembuiltuponth
3、emultivariateBayesianinferencetheory.Oursystemoffersatheoreticallysoundbasisforclientstopredictthereliabilityofcandidateserversbasedonself-experiencesandfeedbacksfrompeers.Inoursystem,afine-grainedqualityofservice(QoS)differentiationmethodisdesignedtosatisfythediverseQoSneedso
4、findividualnodes.Ourreputationsystemisalsoapplication-independentandcansimultaneouslyserveunlimitedP2Papplicationsofdifferenttype.Moreover,itissemidistributedinthesensethatallapplication-relatedQoSinformationisstoredacrosssystemuserseitherinarandomfashionorthroughadistributedh
5、ashtable(DHT).Inaddition,weproposetoleveragecreditsandsocialawarenessasreliablemeansofseekinghonestfeedbacks.Furthermore,ourreputationsystemwellprotectstheprivacyofusersofferingfeedbacksandissecureagainstvariousattackssuchasdefaming,flattering,andtheSybilattack.Weconfirmtheeff
6、ectivenessandefficiencyoftheproposedsystembyextensivesimulationresults.IndexTerms—P2P,QoS,reliability,reputation,security,DHT.Ç1INTRODUCTIONINmanydistributedpeer-to-peer(P2P)applications,suchsystem.Thesesolutionsdonotconsiderprotectingtheasgridcomputing[1],itisessentialthatacl
7、ientbeabletoprivacyofreferenceseither,whichisimportantforseekingpredictthereliabilityofcandidateserversinofferingthehonestfeedbackfromthem(seeSection4.4).desiredqualityofservice(QoS).AnaturalsolutionistoThispaperpresentsthedesignofanovelreputationleveragethereputationsofcandid
8、ateservers.Thisnecessi-systemwiththefollowingnotablepropertie
