the eigentrust algorithm for reputation management in p2p network

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1、TheEigenTrustAlgorithmforReputationManagementinP2PNetworksSepandarD.KamvarMarioT.SchlosserHectorGarcia-MolinaStanfordUniversityStanfordUniversityStanfordUniversitysdkamvar@stanford.eduschloss@db.stanford.eduhector@db.stanford.eduABSTRACTpeer'sGnutellaprogramdirectoryand

2、thenmodifyingtheGnutella.inifiletoallowsharingof.vbsfiles[18].FarmorecommonhavebeenPeer-to-peerfile-sharingnetworksarecurrentlyreceivingmuchat-inauthenticfileattacks,whereinmaliciouspeersrespondtovirtu-tentionasameansofsharinganddistributinginformation.How-allyanyqueryprovi

3、ding“decoyfiles”thataretampered-withordoever,asrecentexperiencewithP2PnetworkssuchasGnutellashows,notwork.theanonymous,opennatureofthesenetworksoffersanalmostIthasbeensuggestedthatthefuturedevelopmentofP2Psystemsidealenvironmentforthespreadofself-replicatinginauthenticfil

4、es.willdependlargelyontheavailabilityofnovelmethodsforensur-Wedescribeanalgorithmtodecreasethenumberofdownloadsingthatpeersobtainreliableinformationonthequalityofresourcesofinauthenticfilesinapeer-to-peerfile-sharingnetworkthatas-theyarereceiving[5].Inthiscontext,attempti

5、ngtoidentifymali-signseachpeerauniqueglobaltrustvalue,basedonthepeer'sciouspeersthatprovideinauthenticfilesissuperiortoattemptingtohistoryofuploads.Wepresentadistributedandsecuremethodtoidentifyinauthenticfilesthemselves,sincemaliciouspeerscaneas-computeglobaltrustvalues,

6、basedonPoweriteration.Byhavingilygenerateavirtuallyunlimitednumberofinauthenticfilesiftheypeersusetheseglobaltrustvaluestochoosethepeersfromwhomarenotbannedfromparticipatinginthenetwork.Wepresentsuchatheydownload,thenetworkeffectivelyidentifiesmaliciouspeersmethodwhereine

7、achpeerisassignedauniqueglobaltrustvalueandisolatesthemfromthenetwork.thatreflectstheexperiencesofallpeersinthenetworkwithpeer.Insimulations,thisreputationsystem,calledEigenTrust,hasInourapproach,allpeersinthenetworkparticipateincomputingbeenshowntosignificantlydecrease

8、thenumberofinauthenticfilesthesevaluesinadistributedandnode-symmetricmannerwithmin-onthenetwork,evenunderavarie