SW-POR: A Novel POR Scheme Using Slepian-Wolf Coding for Cloud Storage

Cloud computing is a service by which the clients can outsource their data to the cloud storage server to deal with the local storage limitation. However, the cloud storage providers are untrustworthy, which can lead to several security challenges, such as data availability, data integrity, and data confidentiality. To mitigate the issues of data availability and data integrity, a novel Slepian-Wolf-based Proof of Retrievability (SW-POR) scheme is proposed to enable the client to check whether the distributed data stored in the cloud servers is intact or not. The proposed SW-POR scheme not only can obtain an optimal coded block size, but also it can provide the exact-repair feature and low complexity. In this paper, the security analysis and efficiency analysis are provided. Simulation results show that the SW-POR scheme can accomplish a significant improvement in computation time.