An Efficient Provable Secure Public Auditing Scheme for Cloud Storage

• Chunxiang Xu,
• Yuan Zhang,
• Yong Yu,
• Xiaojun Zhang,
• Junwei Wen,

Vol. 8, No. 11, November 29, 2014
10.3837/tiis.2014.11.032, Download Paper (Free):

• Cloud Storage
• auditing scheme
• cryptanalysis
• improvement

Abstract

Cloud storage provides an easy, cost-effective and reliable way of data management for users without the burden of local data storage and maintenance. Whereas, this new paradigm poses many challenges on integrity and privacy of users' data, since users losing grip on their data after outsourcing the data to the cloud server. In order to address these problems, recently, Worku et al. have proposed an efficient privacy-preserving public auditing scheme for cloud storage. However, in this paper, we point out the security flaw existing in the scheme. An adversary, who is on-line and active, is capable of modifying the outsourced data arbitrarily and avoiding the detection by exploiting the security flaw. To fix this security flaw, we further propose a secure and efficient privacy-preserving public auditing scheme, which makes up the security flaw of Worku et al.’s scheme while retaining all the features. Finally, we give a formal security proof and the performance analysis, they show the proposed scheme has much more advantages over the Worku et al.’s scheme.

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