Netinfo Security ›› 2015, Vol. 15 ›› Issue (7): 7-12.doi: 10.3969/j.issn.1671-1122.2015.07.002

• Orginal Article • Previous Articles     Next Articles

Cloud Data Integrity Verification Scheme without Bilinear Pairing

Yang ZHAO, Hua-qiang REN(), Hu XIONG, Yang CHEN   

  1. School of Information and Software Engineering, University of Electronic Science and Technology of China, Chengdu Sichuan 610054, China
  • Received:2015-05-11 Online:2015-07-01 Published:2015-07-28

Abstract:

Cloud storage system brings conveniences to the modern life, the user can store their data in the cloud storage system and access data through the Internet in different places. But due to the cloud server is half credible, in order to ensure the completeness and correctness of the cloud data, the user needs to provable cloud data possession. This paper proposes a cloud data integrity verification scheme without bilinear pairing. The users can entrust a third party agent to audit cloud data. Firstly, the third party agent send challenge information to the cloud server, the cloud server according the information to generate the corresponding proof sent to the third party agent for validation. Before the third party agent audit the proof, it needs to be sent to the re-signature server for re-signature, and then the third party agent using its own private key to verify the proof of re-signature. When audit fails, the third party agent notifies the user. Since the scheme proves without bilinear pairing, the computing performance is superior to the existing scheme which requires expensive bilinear pairing operation. At the same time, because in the audit process it requires the participation of re-signature server, so this scheme can realize the function which the users undo rights of the third party auditor. By security analysis and performance analysis which in the end of this article, we can be seen that this scheme is an efficient security provable data possession scheme.

Key words: cloud storage, data integrity, the third-party audit, re-signature

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