the eigentrust algorithm for reputation management in p2p networks

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1、TheEigenTrustAlgorithmforReputationManagementinP2PNetworksSepandarD.KamvarMarioT.SchlosserHectorGarcia-MolinaStanfordUniversityStanfordUniversityStanfordUniversitysdkamvar@stanford.eduschloss@db.stanford.eduhector@db.stanford.eduABSTRACTVBS.Gnutellaworm,whichspreadsbymakingacopyofitself

2、inapeer'sGnutellaprogramdirectory,thenmodifyingtheGnutella.iniPeer-to-peerfile-sharingnetworksarecurrentlyreceivingmuchat-filetoallowsharingof.vbsfiles[19].Farmorecommonhavebeententionasameansofsharinganddistributinginformation.How-inauthenticfileattacks,whereinmaliciouspeersrespondtovirtu-

3、ever,asrecentexperienceshows,theanonymous,opennatureofallyanyqueryproviding“decoyfiles”thataretamperedwithordothesenetworksoffersanalmostidealenvironmentforthespreadofnotwork.self-replicatinginauthenticfiles.IthasbeensuggestedthatthefuturedevelopmentofP2PsystemsWedescribeanalgorithmtodecr

4、easethenumberofdownloadswilldependlargelyontheavailabilityofnovelmethodsforensur-ofinauthenticfilesinapeer-to-peerfile-sharingnetworkthatas-ingthatpeersobtainreliableinformationonthequalityofresourcessignseachpeerauniqueglobaltrustvalue,basedonthepeer'stheyarereceiving[6].Inthiscontext,at

5、temptingtoidentifymali-historyofuploads.Wepresentadistributedandsecuremethodtociouspeersthatprovideinauthenticfilesissuperiortoattemptingtocomputeglobaltrustvalues,basedonPoweriteration.Byhavingidentifyinauthenticfilesthemselves,sincemaliciouspeerscaneas-peersusetheseglobaltrustvaluestoch

6、oosethepeersfromwhomilygenerateavirtuallyunlimitednumberofinauthenticfilesiftheytheydownload,thenetworkeffectivelyidentifiesmaliciouspeersarenotbannedfromparticipatinginthenetwork.Wepresentsuchaandisolatesthemfromthenetwork.methodwhereineachpeeriisassignedauniqueglobaltrustvalueInsimulati

7、ons,thisreputationsystem,calledEigenTrust,hasthatreflectstheexperiencesofallpeersinthenetworkwithpeeri.beenshowntosignificantlydecreasethenumberofinauthenticfilesInourapproach,allpeersinthenetworkparticipateincomputingonthenetwork,evenunderavarietyofconditionswheremalicioustheseva