A generic framework for blockchain-assisted on-chain auditing for off-chain storage

In recent times, blockchain-based data auditing protocols have emerged as a cutting-edge area of study. Nevertheless, a conspicuous dearth of a generic framework upon which to ground such protocols is evident. This study introduces a pioneering and all-encompassing framework, designated as “Blockchain-assisted On-chain Auditing for Off-chain Storage” (BA2OC). The BA2OC framework operates without the reliance on a predefined auditor for the auditing process or a centralized verifier for the verification of on-chain auditing. It is conceivable that BA2OC forms the cornerstone of public data auditing protocols underpinned by blockchain technology. This framework bestows evidence of data ownership, ensures data integrity, facilitates public verification, supports batch verification, and bolsters the security against cyber threats through the utilization of cryptographic tools. The analysis underscores the comprehensive nature of the BA2OC framework, which positions it as the linchpin of blockchain-based public auditing protocols. Following a parametric evaluation of the BA2OC framework, this study takes into account real-world considerations, such as the utilization of the RSA cryptosystem and Android-based smartphones, to proffer a concrete protocol. The investigation further demonstrates that the BA2OC framework minimizes communication overhead while maintaining operational efficiency.