基于区块链的云数据审计方案

云存储凭借高扩展性、高可靠性、低成本的数据管理优点得到用户青睐。然而，如何确保云数据完整性成为亟待解决的安全挑战。目前的云数据完整性审计方案，绝大部分是基于半可信第三方来提供公共审计服务，它们存在单点失效、性能瓶颈以及泄露用户隐私等问题。针对这些缺点提出了基于区块链的审计模型。该模型采用分布式网络、共识算法建立一个去中心化、易扩展的网络解决单点失效问题和计算力瓶颈，利用区块链技术和共识算法加密用户数据保证数据不可窜改和伪造，确保了用户数据的隐私。实验结果表明，与基于半可信第三方云数据审计方案相比，该模型能够保护用户隐私，显著提高了审计效率，减少通信开销。

Research on cloud data audit scheme based on blockchain

Cloud storage is favored by users for its high scalability, high reliability, and low cost data management. However, how to ensure cloud data integrity has become an important security challenge that needs to be solved immediately. Most of the current cloud storage integrity auditing schemes are based on semi-trusted third party to provide public integrity auditing ser-vices, which exists some problems such as single point failure, performance bottlenecks, and leakage of user privacy. Due to these weaknesses, this paper proposed an audit model based on blockchain. The model used distributed network and consensus algorithm to establish a decentralized and easy-to-expand network to solve single-point failure problems and computational power bottlenecks. Blockchain technology and consensus algorithm were used to encrypt user data to ensure data couldn''t be tampered and forged, ensuring users data privacy. The experimental results show that compared with the semi-trusted third-party cloud data auditing scheme, the proposed model can protect user privacy, significantly improve auditing efficiency and reduce communication cost.