reputation management algorithms for dht-based peer-to-peer environment

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1、ComputerCommunications32(2009)1400–1409ContentslistsavailableatScienceDirectComputerCommunicationsjournalhomepage:www.elsevier.com/locate/comcomReputationmanagementalgorithmsforDHT-basedpeer-to-peerenvironmentNatalyaFedotova*,LucaVeltriUniversityofParma,Viale

2、Usberti,181/AParma,ItalyarticleinfoabstractArticlehistory:Thispaperaddressestheproblemofintegrationofreputationmanagementmechanismsintodatalook-Availableonline13March2009upandroutingprocessestocopewithsomespecificsecurityproblemsinpeer-to-peer(P2P)networksbase

3、donDistributedHashTables(DHT).Thegoalistofindamodefor‘‘good”peerstocooperateinorderKeywords:towithstandmaliciousactivityofsinglemalevolentpeersandtheircollusionsaswell.ReputationWestartfromconsiderationofindividualinstrumentsforreputationevaluationthateverysin

4、glepeerDistributedHashTablesshouldbeprovidedwithtoautonomouslydefinethelevelofitsowntrusttowardsothers.Wealsopro-Peer-to-peerposeapossiblescenarioofintegrationofsomeexistingreputationmanagementtechniquesandroutingSecuritymechanismsinaP2Pnetworkbasedonthepopula

5、rKademliaalgorithm.Then,wepresentaninteractionalgorithmthatallowspeerstoobtaintheglobaltrustvalueforeachsinglenodethroughexchangingopinionsintheformoflocaltrustvaluesindependentlycalculatedbyeverypeerwithothermembersofthecommunity.Suchcollaborationbetweenpeer

6、sisindispensabletocopewithmaliciousactivityofinconsistentnaturespecifictoDHT-basedenvironment.Torenderthealgorithmresilienttothepres-enceofmaliciousparticipantsweproposetoapplysolutionsforByzantineAgreementtoexchangeopin-ionsamongpeers.Wealsoprovidemathematica

7、levaluationsconcerningthecomplexityandcomputationalcostsoftheproposedalgorithmthatevidenceapparentimprovementsoverthepreviousone.Ó2009ElsevierB.V.Allrightsreserved.1.Introductionwithstandthemaliciousactivity.Inparticular,DHT-basedP2Pnet-worksarevulnerabletosp

8、ecificthreatsandattacks,typicalforthisenvironment,thataregenerallyprovokedbymaliciousbehaviour‘‘...Ideasthathavegreatresultsarealwayssimpleones.Mywholeofsomenodes:routingattacks,storageand