Abstract
In cloud storage scenarios, data security has received considerably more attention than before. To ensure the reliability and availability of outsourced data and improve disaster resilience and data recovery ability, important data files possessed by users must be stored on multiple cloud service providers (CSPs). However, we know that CSP is invariably not reliable. In this situation, to verify the integrity of replica files stored by users on multiple CSPs simultaneously, a new dynamic multiple-replica provable data possession (DMR-PDP) scheme is proposed. In addition, due to the importance of the tag set, we utilize vector dot products instead of using the modular power calculation in the traditional PDP scheme, which greatly reduces the calculation time and storage space usage. Moreover, a novel dynamic data structure, the divided address-version mapping table (DAVMT), is presented and used to solve the problem of data dynamic operation. A practical experiment validates the effectiveness of our proposed scheme in the end.
Highlights
Cloud computing [1], [2], as the new generation of distributed computing, parallel computing and grid computing, has achieved rapid development and wide application since it was proposed
To verify the integrity of replica files stored by users on multiple cloud service providers (CSPs) at the same time, MR-PDP [12] is proposed, which proves that integrity verification on multiple replica
MAIN CONTRIBUTION In this paper, we propose a new dynamic multiple-replica provable data possession (DMR-PDP) scheme that can verify the integrity of replica files stored by users on multiple CSPs simultaneously
Summary
Cloud computing [1], [2], as the new generation of distributed computing, parallel computing and grid computing, has achieved rapid development and wide application since it was proposed. How to design the tag generation method to save system calculation time and storage space usage and how to realize the dynamic operation of data blocks have become problems worthy of consideration. A. MAIN CONTRIBUTION In this paper, we propose a new dynamic multiple-replica provable data possession (DMR-PDP) scheme that can verify the integrity of replica files stored by users on multiple CSPs simultaneously. (1) We present a dynamic multiple-replica provable data possession scheme, named DMR-PDP, which can verify the replica files’ integrity simultaneously stored on multiple CSPs. In this scheme, the method of tag generation is based on the vector dot products instead of the modular power calculation, which greatly reduces the calculation time and the storage space.
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