Secure Deduplication Scheme for Cloud Encrypted Data

Cloudstorage(CS)isgainingmuchpopularitynowadaysbecauseitofferslow-costandconvenient networkstorageservices.Inthisbigdataera,theexplosivegrowthindigitaldatamovestheusers towardsCSbutthiscausesalotofstoragepressureonCSsystemsbecausealargevolumeofthis dataisredundant.Datadeduplicationisaneffectivedatareductiontechnique.Thedynamicnature ofdatamakessecurityandownershipofdataasaveryimportantissue.Proof-of-ownershipschemes arearobustwaytochecktheownershipclaimedbyanyowner.However,thismethodaffectsthe deduplication process because encryption methods have varying characteristics. A convergent encryption(CE)schemeiswidelyusedforsecuredatadeduplication.TheproblemwiththeCEbasedschemeisthattheusercandecrypttheclouddatawhilehehaslosthisownership.Thisarticle addresses the problem of ownership revocation by proposing a secure deduplication scheme for encrypteddata.Theproposedschemeenhancesthesecurityagainstunauthorizedencryptionand poisonattackonthepredictedsetofdata. KEywoRDS Cloud Storage, Convergent Encryption, Deduplication, Proof-of-Ownership

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