期刊
INFORMATION SCIENCES
卷 519, 期 -, 页码 348-362出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.ins.2020.01.051
关键词
Blockchain; Smart contract; Public auditing; Fair payment; Cloud storage
资金
- National Natural Science Foundation of China [61602287, 61802235, 61672330, 61702168]
- Primary Research & Development Plan of Shandong Province [2018GGX101037]
- Major Scientific and Technological Innovation Project of Shandong Province [2018CXGC0702]
- Development and Construction Funds Project of National Independent Innovation Demonstration Zone in Shandong Peninsula [5190101010001]
Cloud storage plays an important role in today's cloud ecosystem. Increasingly clients tend to outsource their data to the cloud. In spite of its copious advantages, integrity has always been a significant issue. The audit method is commonly used to ensure integrity in cloud scenarios. However, traditional auditing schemes expect a third-party auditor (TPA), which is not always available in the real world. Also, the former scheme implies a limited pay-as-you-go service, as it requires the client to pay for the service in advance. In this paper, we aim to address the aforementioned drawback by adopting blockchain to replace TPA and designing a blockchain-based fair payment smart contract for public cloud storage auditing. In our system, data owner and cloud service provider (CSP) will run a blockchain-based smart contract. The contract ensures that the CSP is required to submit data possession proof regularly. The CSP gets paid only if the verification is passed; otherwise, it gets no remuneration but has to pay the penalties. To reduce the number of interactions in the execution of contract, we present the notion of non-interactive public provable data possession and design a blockchain-based smart contract for public cloud storage auditing based on this primitive. (C) 2020 Elsevier Inc. All rights reserved.
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