Article
DATALOCK PRO: BLOCKCHAIN FOR SECURE CLOUD AUDITING
Cloud computing has become a dominant paradigm for storing and managing large volumes of data due to its scalability, flexibility, and cost efficiency. However, outsourcing data to remote cloud servers results in the loss of direct control over data, raising critical concerns regarding data integrity, security, and trust. Traditional auditing mechanisms rely on centralized Third-Party Auditors (TPAs), which introduce risks such as single points of failure, lack of transparency, and potential collusion with cloud providers. To address these challenges, this project proposes a Blockchain-Based Decentralized Public Auditing (BDPA) system for secure cloud storage verification. The system leverages blockchain technology to eliminate dependency on centralized auditors by enabling decentralized verification through smart contracts. Users generate authentication tags using identity-based cryptography and upload data to the cloud. During auditing, a decentralized commit-reveal mechanism generates random challenges, and the cloud server responds with proof of data possession. The blockchain network verifies this proof without accessing actual data, ensuring privacy preservation. Audit results are permanently recorded on the blockchain, providing transparency and tamper-proof logging. The proposed system improves reliability, scalability, and resistance against malicious attacks while maintaining efficient verification with minimal communication overhead. Experimental evaluation demonstrates that the system effectively prevents data tampering, ensures secure auditing, and enhances trust in cloud storage services. Overall, integrating blockchain with cloud auditing provides a robust, decentralized, and privacy-preserving solution for modern data integrity verification
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