A Distributed Off-chain Storage Framework Based on Blockchain

doi:10.3969/j.issn.1671-1122.2021.02.011

Abstract

Abstract:

With the continuous development of distributed storage technology, more and more enterprises and government agencies save their data in the cloud to realize distributed storage of big data and data resource sharing. The decentralized, traceable, non-tamperable, and data consistency features of block-chain technology have brought new opportunities to address the privacy and security challenges of cloud storage. In this paper, we propose a distributed off-chain storage framework based on block-chain. Block nodes and storage nodes are deployed in the block-chain, where the block nodes are used to execute the underlying block-chain operation mechanism and the storage nodes are used to store data and files, and off-chain storage is achieved by separating the block and storage functions. In addition, a global interaction verification method using a classical data possession based mechanism is proposed to ensure distributed, reliable and provable storage of data files. The audit mechanism of the fair challenge mechanism is triggered when users add blocks (stored files) to the block-chain, thus implicitly verifying the integrity of all files stored off-chain.

Key words: block chain, distributed storage, provable data possession, off-chain storage, data integrity verification

CLC Number:

TP309

CHU Zhiqiang, WU Jiying, XU Lei, DU Cong. A Distributed Off-chain Storage Framework Based on Blockchain[J]. Netinfo Security, 2021, 21(2): 87-93.

Figures/Tables 2

References 13

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