An integrity verification scheme for multiple replicas in clouds

Authors:
La Zhang;Qingzhong Li;Yuliang Shi;Lin Li;Wenxiao He
Affiliations:
School of Computer Science and Technology, Shandong Provincial Key Laboratory of Software Engineering, Shandong University, China;School of Computer Science and Technology, Shandong Provincial Key Laboratory of Software Engineering, Shandong University, China;School of Computer Science and Technology, Shandong Provincial Key Laboratory of Software Engineering, Shandong University, China;School of Computer Science and Technology, Shandong Provincial Key Laboratory of Software Engineering, Shandong University, China;School of Computer Science and Technology, Shandong Provincial Key Laboratory of Software Engineering, Shandong University, China
Venue:
WISM'12 Proceedings of the 2012 international conference on Web Information Systems and Mining
Year:
2012

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Abstract

Recently, cloud computing is the fundamental change happening in the field of Information Technology. In SaaS (software as a service) model, both applications software and databases will be deployed to the centralized large data centers, where the management of the data and services may not be fully trustworthy. Many storage systems rely on replicas to increase the availability and durability of data, but secure replicas storage brings about many new security challenges. In this paper, based on multi-tenancy data-sharing storage model, we propose an integrity verification scheme which allows a third party auditor (TPA) to verify the integrity of multiple replicas stored in clouds through random sampling and periodic verification. In particular, via the double-layer authenticating construction, we achieve the isolation of different tenants' replicas and dynamic data operations. Extensive performance analysis about sampling in different conditions shows correctness of the proposed scheme in this paper.