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1、IEICETRANS.FUNDAMENTALS,VOL.E96A,NO.12DECEMBER20132709PAPERIdentity-BasedPublicVerificationwithPrivacy-PreservingforDataStorageSecurityinCloudComputing∗JiningZHAO†a),ChunxiangXU†,Nonmembers,FagenLI†,Member,andWenzhengZHANG††,NonmemberSUMMARYIntheCloudc
2、omputingera,userscouldhavetheirdataitsownmotivationstobehaveunfaithfully,e.g.,discard-outsourcedtocloudserviceprovider(CSP)toenjoyon-demandhighqual-ingdata,hidingthedatalostnews,forcommercialinterest.ityservice.Onthebehalfoftheuser,athirdpartyauditor(
3、TPA)whichConsequently,itisofgreatimportanceforuserstobeablecouldverifytherealdatapossessiononCSPiscriticallyimportant.ThecentralchallengeistobuildefficientandprovablysecuredataverificationtoverifythedatapossessionontheCSP.Consideringtheschemewhileensurin
4、gthatnousersprivacyisleakedtoanyunautho-largesizeofoutsourceddataandtheconstrainedcapabil-rizedparty,includingTPA.Inthispaper,weproposethefirstidentity-basedity,thetaskofauditingbecomesunrealisticandexpensivepublicverificationscheme,basedontheidentity-b
5、asedaggregatesignatureforusersallontheirown.So,itiscriticallyimportantto(IBAS).Inparticular,byminimizinginformationthatverificationmessagesenablepublicauditingforclouddatastorageservice,byancarryandTPAobtainsorstores,wecouldsimplifykeymanagementandgrea
6、tlyreducetheoverheadsofcommunicationandcomputation.Unlikeindependentthirdpartyauditor(TPA).theexistingworksbasedoncertificates,inourscheme,onlyaprivatekeyRecently,inthecontextofensuringpossessionofre-generator(PKG)hasatraditionalpublickeywhiletheuserju
7、stkeepsitsmotestoreddata,somepublicverificationschemesbasedonidentitywithoutbindingwithcertificate.Meanwhile,weutilizeprivacy-certificatesystemhavebeenproposedunderdifferentsecu-preservingtechnologytokeepusersprivatedataoffTPA.Wealsoextendourschemewiththes
8、upportofbatchverificationtasktoenableTPAtorityandsystemmodels[3][6].WiththeassistanceofTPA,performpublicauditsamongdifferentuserssimultaneously.Ourschemeisclouduserscanreleasethemselvesfromtheheavytaskofprovablysecureintherandomoraclemodelundert
