Cryptology ePrint Archive: Report 2012/365

Public Auditing for Ensuring Cloud Data Storage Security With Zero Knowledge Privacy

Wang Shao-hui, Chen Dan-wei, Wang Zhi-wei, Chang Su-qin

Abstract: In cloud storage service, clients upload their data together with authentication information to cloud storage server. To ensure the availability and integrity of clients' stored data, cloud server(CS) must prove to a verifier that he is actually storing all of the client's data unchanged. And, enabling public auditability for cloud storage is of critical importance to users with constrained computing resources, who can resort to a third party auditor (TPA) to check the integrity of outsourced data. However, most of the existing proofs of retrievability schemes or proof of data possession schemes do not consider data privacy problem. Zero knowledge privacy requires TPA or the adversary can not deduce any information of the file data from auditing system. In this paper, after giving a new construction of a recently proposed cryptographic primitive named aggregatable signature based broadcast (ASBB) encryption scheme, we present an efficient public auditing scheme with zero knowledge privacy. The new scheme is as efficient as the scheme presented by Shacham and Waters without considering privacy and is secure in the random oracle model.

Category / Keywords: Cloud Computing, Cloud Storage, Public Auditing, Zero-Knowledge Privacy, Integrity

Publication Info: no

Date: received 27 Jun 2012, last revised 16 Sep 2012

Contact author: wangshaohui at njupt edu cn

Available format(s): PDF | BibTeX Citation

Version: 20120917:015327 (All versions of this report)

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