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Journal of Information Science and Engineering, Vol. 35 No. 1, pp. 125-135

Effective Privacy Preservation in Third-Party Cloud Storage Auditing

Department of Electrical and Computer Engineering
Tamkang University
Tamsui, New Taipei City, 251 Taiwan
E-mail: pjchuang@ee.tku.edu.tw

In cloud storage, the third-party auditor (TPA) will perform public auditing and data integrity check to maintain the integrity of outsourced data stored in the cloud server. To avoid possible user privacy leakage in the auditing process, the TPA should learn nothing about the user. This paper presents a new auditing scheme which can keep the TPA from learning any user data block in an earlier stage  in contrast to previous schemes. Simulation runs are carried out to examine the privacy preserving performance of our new scheme and related schemes. The results show that our scheme is able to produce better privacy protection at no more computation time cost for involved entities, i.e., the user, server and TPA.

Keywords: cloud storage, privacy preserving, third-party auditing, zero knowledge proof, experimental evaluation

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