A scheme to manage encrypted data storage with deduplication in cloud

Abstract

Cloud computing offers a new way of service provision by re-arranging various resources and IT structures over the Internet. Private user data are often stored in cloud in an encrypted form in order to preserve the privacy of data owners. Encrypted data sharing introduces new challenges for cloud data deduplication. We found that existing solutions of deduplication suffer from high computation complexity and cost and therefore few of them can be really deployed in practice. In this paper, we propose a scheme to deduplicate encrypted data stored in cloud based on proxy re-encryption. We evaluate its performance and advantages based on extensive analysis and implementation. The results show the efficiency and effectiveness of the scheme for potential practical deployment.