Public Audit and Secure Deduplication in Cloud Storage using BLS signature

Although many researches have been done individually on each topic of secure deduplication andintegrity auditing, the study of the combined model of these two functions was relatively few. In thispaper, we propose a scheme to provide client-side deduplication for the encrypted data while simultaneouslysupporting public audit of data stored in the cloud. The proposed scheme performs thechallenge-response protocol for secure deduplication and integrity audit using BLS signature basedhomomorphic linear authenticator, and supports public audit using the third party auditor. The proposedscheme satisfies all the basic security objectives and improves the problems of the existingschemes.