Authors: Xiaoxue Ma; Pengliang Shi
Addresses: Department of Computer Teaching, Hebei University, 071002, Baoding, China ' Key Laboratory on High Trusted Information System, Hebei University, 071002, Baoding, China
Abstract: Multi-copy storage can effectively improve the security of cloud storage. To resolve the problem of dynamic security audit of multi-copy data in cloud, this paper proposes a dynamic multi-copy adaptive audit scheme (DMCAA) based on dynamic index table structure (DITS). In order to achieve the correctness and completeness detection of multiple copies, the data blocks and the corresponding location index information are connected to generate a duplicate file. The audit process is divided into two parts, one is the third-party audits and the other is client audits. When auditing, in order to prevent collusion attacks as well as to improve the audit accuracy, the third-party auditors apply the challenge-response mode to detect the data block labels, and the client auditor applies the adaptive audit algorithm to retrieve the index information of the data blocks. Finally, to prevent replacement and replay attacks, the version number and block number of the file information are added to the block label. Through theoretical analysis and experimental comparison, the scheme is more secure in verifying the integrity of dynamic data and the correctness of the multi-copy data, which can effectively prevent the existing data threats.
Keywords: cloud storage; dynamic auditing; multiple copies; integrity.
International Journal of Computational Science and Engineering, 2020 Vol.23 No.1, pp.82 - 90
Received: 12 Mar 2020
Accepted: 06 Apr 2020
Published online: 08 Oct 2020 *