effective use of reputation in peer-to-peer environment

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1、*EffectiveUseofReputationinPeer-to-PeerEnvironmentsThanasisG.PapaioannouandGeorgeD.StamoulisDepartmentofInformatics,AthensUniversityofEconomicsandBusiness(AUEB),76PatisionStr.,10434Athens,Greece.{pathan,gstamoul}@aueb.grAbstract1.IntroductionPeer-to-peerenvironmentshavebecomepopularasPeer-to-peeren

2、vironmentsgainincreasingaframeworkforexchangeofservices.Intheseacceptanceintheinformationsocietyasanoverlayenvironments,certainpeersmayfailtoprovidetheirframeworkforexchangingservices.Thevalueofsuchservices.Reputationcanbeapropermeansofaservicefortheclientpeerdependsonthediscoveringlow-performingpe

3、ers,withoutaffectingperformanceofthepeersprovidingit.Infact,apeersignificantlyinherentcharacteristicsofPeer-to-Peermayprovideserviceswithalowperformancelevel.environments,suchasanonymityandprivacy.Thereasonforthiscanbeeitherthepeer’shiddentypeHowever,theaccuratecalculationofthereputation(i.e.strate

4、gy)orhishiddenquality(i.e.performingmetricsmaynotbesufficienttoprovidetherightability);however,sincebothofthesereasonshavetheincentivestopeers.Inthispaper,weshowthatthesameeffect,wedonotdistinguishbetweenpeersstraightforwardapproachforpeerstoexploitthefallingtotheformerorthelattercase.Reputationcan

5、reputationmetrics(i.e.byjustselectingasaprovidingbeapropermeansofrevealinglow-performingpeerspeertheonewiththehighestreputation)mayleadtoinelectronicenvironments,ifitiscalculatedaccuratelyunexpectedlylowefficiencyforhigh-performingpeers.[1],[3].However,theaccuratecalculationoftheWeargueandjustifyex

6、perimentallythatthereputationvaluebyitselfmaynotbeadequateasacalculationofthereputationvalueshastobemechanismtoimprovetheachievableefficiencyofcomplementedbyreputation-basedpoliciesthatdefinehigh-performingpeersandtoprovidetherightthepairsofpeerseligibletointeract.Weintroducetwoincentivesforpeersto

7、offerservicesofhighquality.orthogonaldimensionsconstitutingthereputation-Indeed,thestraightforwardapproachforpeerstobasedpolicies:“providerselection”and“contentionexploitthereputationmetricsistojustselectas