Data Integrity Audit Scheme Based on Quad Merkle Tree and Blockchain

Cloud storage is an essential method for data storage. Verifying the integrity of in cloud critical client. Traditional approaches rely on third-party auditors (TPAs) to accomplish auditing tasks. However, are often not trusted. To eliminate over-reliance auditors, this paper designs a blockchain-based scheme that uses blockchain instead ensure reliability auditing. Meanwhile, our based audit quad Merkle hash tree, using root tree verify data, which significantly improves computing and efficiency. Automated verification activities by deploying smart contracts allows us have more up-to-date picture integrity. The performance evaluated through security analysis experiments, prove proposed secure effective.