Abstract
In cloud storage, the message-locked encryption method is widely used in security deduplication. However, Brute force attack becomes a serious issue. Current research addresses the brute force attack problem in secure deduplication using a third-party model. Even though there is a trusted third party in real life, it is hard to be applied to traditional two-party based deduplication system which only includes the client and the storage provider. It is obvious that industries prefer to take the simpler and more practical secure architecture under the same level of security. However, the existing two-party secure deduplication approaches either have inferior performance or security holes. To make the two-party secure deduplication comparable in performance with unprotected baseline and keep the same level security with the existing two-party secure deduplication, we propose a high-performance two-party secure deduplication, PTS-Dep. By leveraging secure duplicate data detection scheme and secure duplicate data's key sharing scheme, PTS-Dep can perform data deduplication with the security guarantee. Our approach improves average deduplication performance up to 92\% for Fslhome workloads compared to previous secure deduplication schemes when the average chunk size is 12KB.
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