Secure Distributed Deduplication Systems with Improved Reliability
Abstract— Secure Distributed Deduplication Systems with Improved Reliability. Data deduplication is a technique for eliminating duplicate copies of data, and has been widely used in cloud storage to reduce storage space and upload bandwidth. However, there is only one copy for each ﬁle stored in cloud even if such a ﬁle is owned by a huge number of users. As a result, deduplication system improves storage utilization while reducing reliability. Furthermore, the challenge of privacy for sensitive data also arises when they are outsourced by users to cloud. Aiming to address the above security challenges, this paper makes the ﬁrst attempt to formalize the notion of distributed reliable deduplication system. We propose new distributed deduplication systems with higher < Final Year Projects 2016 > reliability in which the data chunks are distributed across multiple cloud servers. The security requirements of data conﬁdentiality and tag consistency are also achieved by introducing a deterministic secret sharing scheme in distributed storage systems, instead of using convergent encryption as in previous deduplication systems. Security analysis demonstrates that our deduplication systems are secure in terms of the deﬁnitions speciﬁed in the proposed security model. As a proof of concept, we implement the proposed systems and demonstrate that the incurred overhead is very limited in realistic environments.
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