基于改进的区块链云数据动态审计机制研究  

Research on dynamic audit mechanism of cloud data based on improved blockchain

作　　者：郭彩彩 金瑜[1,2] Guo Caicai;Jin Yu(College of Computer Science&Technology,Wuhan University of Science&Technology,Wuhan 430065,China;Hubei Province Key Laboratory of Intelligent Information Processing&Real-time Industrial System,Wuhan 430065,China)

机构地区：[1]武汉科技大学计算机科学与技术学院,武汉430065 [2]湖北省智能信息处理与实时工业系统重点实验室,武汉430065

出　　处：《计算机应用研究》2023年第3期659-666,共8页Application Research of Computers

基　　金：国家自然科学基金资助项目(61802286)。

摘　　要：云存储凭借其高扩展性、低成本等优点得到大众青睐,但确保云数据完整性成为亟待解决的安全挑战。为解决基于TPA的公共审计方案中存在的安全和效率问题,有学者提出了基于区块链的公共审计方案,但数据拥有者的审计负担较大,都是静态审计,且不支持错误数据定位操作。基于此,提出了基于改进的区块链云数据动态审计机制,通过将部分审计工作委托给共识代表以减轻数据拥有者审计开销,设计带权多层次MHT结构以支持数据的动态操作,审计失败时帮助定位到错误数据。理论分析和实验结果表明,与现有方案相比,提出方案更安全可靠、动态审计效率更高,数据拥有者的计算和通信开销更少。People prefer to use cloud storage due to its advantages of high scalability and low cost, but ensuring the integrity of cloud data has become a security challenge that needs to be solved immediately. In order to solve the security and efficiency problems of the TPA-based public audit schemes, some scholars proposed blockchain-based public audit schemes which not only increased the audit burden of data owners, but were static and did not support wrong data location operations. Therefore, this paper proposed a public audit scheme based on improved blockchain which supported dynamic data operations. The paper reduced the audit overheads of data owners by outsourcing part of the audit work to the consensus representative, designed a multi-level MHT with weights to support dynamic operations, and helped to locate the wrong data when the audit failed. Theoretical analysis and experimental evaluation show that compared with the existing schemes, the proposed scheme achieves desirable security, higher dynamic audit efficiency, less computation and communication overheads for data owners.

关 键 词：云存储 区块链 公共审计 动态操作 错误数据 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]