A Hybrid Cloud Approach for Secure Authorized Deduplication
Abstract— Data deduplication is one of important data compression techniques for eliminating duplicate copies of repeating data, and has been widely used in cloud storage to reduce the amount of storage space and save bandwidth. To protect the conﬁdentiality of sensitive data while supporting deduplication, the convergent encryption technique has been proposed to encrypt the data before outsourcing. To better protect data security, this paper makes the ﬁrst attempt to formally address the problem of authorized data deduplication. Different from traditional deduplication systems, the differential privileges < Final Year Projects 2016 > rights of users are further considered in duplicate check besides the data itself. We also present several new deduplication constructions supporting authorized duplicate check in a hybrid cloud architecture. Security analysis demonstrates that our scheme is secure in terms of the deﬁnitions speciﬁed in the proposed security model.
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