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Conference Paper
Privacy Preserving Client-side Deduplication scheme in Cloud Storage
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- Authors
- Cheolhee Park, Hyun-il Kim, Dowon Hong, Changho Seo, Ku-Young Chang
- Issue Date
- 2015-07
- Citation
- Asia Pacific International Conference on Information Science and Technology (APIC-IST) 2015, pp.141-147
- Language
- English
- Type
- Conference Paper
- Abstract
- Cloud storage providers perform deduplication to save cloud storage resources by storing only one of the same files. Users who store sensitive data in remote storage want to encrypt the data. However, cloud storage providers cannot detect data duplication because the result of conventional encryption looks like random data. Although convergent encryption resolves this problem, it has a vulnerability to brute-force attack. On the other hand, in order to save bandwidth as well as storage space, various client-side deduplication schemes have been proposed. However, these schemes still cannot solve the security problem. Recently, we proposed a secure deduplication scheme which guarantees data confidentiality and brute-force attack resilience. In this paper, we propose an improved version of our scheme with proofs of ownership(PoW) and evaluate it on Openstack Swift. And we measure the upload/download overhead. In the implementation, we also show that the proposed scheme can be sufficiently applied in practical.
- KSP Keywords
- Attack resilience, Brute-force attack, Convergent encryption, Data duplication, OpenStack swift, Privacy-preserving, Proofs of ownership, Secure deduplication, Sensitive Data, Storage Cloud, Storage space