Publication Type

Journal Article

Version

publishedVersion

Publication Date

3-2022

Abstract

To improve data availability and durability, cloud users would like to store multiple copies of their original files at servers. The multi-copy auditing technique is proposed to provide users with the assurance that multiple copies are actually stored in the cloud. However, most multi-replica solutions rely on Public Key Infrastructure (PKI), which entails massive overhead of certificate computation and management. In this article, we propose an efficient multi-copy dynamic integrity auditing scheme by employing certificateless signatures (named MDSS), which gets rid of expensive certificate management overhead and avoids the key escrow problem in identity-based signatures. Specifically, we improve the classic Merkle Hash Tree (MHT) to achieve batch updates for multi-copy storage, which allows the communication overhead incurred for dynamics to be independent of the replica number. To meet the flexible storage requirement, we propose a variable replica number storage strategy, allowing users to determine the replica number for each block. Based on the fact that auditors may frame Cloud Storage Servers (CSSs), we use signature verification to prevent malicious auditors from framing honest CSSs. Finally, security analysis proves that our proposal is secure in the random oracle model. Analysis and simulation results show that our proposal is more efficient than current state-of-the-art schemes.

Keywords

Cloud storage, integrity auditing, multi-copy storage, data dynamics

Discipline

Data Storage Systems | Information Security

Research Areas

Information Systems and Management

Publication

IEEE Transactions on Dependable and Secure Computing

Volume

19

Issue

2

First Page

1118

Last Page

1132

ISSN

1545-5971

Identifier

10.1109/TDSC.2020.3013927

Publisher

Institute of Electrical and Electronics Engineers

Additional URL

http://doi.org/10.1109/TDSC.2020.3013927

Download

Share

COinS