• Syed Sabiha
• Dr. PVN Rajeswari

The growing trend of clients outsourcing data to cloud storage highlights critical concerns regarding information integrity. Blockchain technology, with its inherent decentralization and immutability, is increasingly being explored as an alternative to traditional third-party auditors. However, existing blockchain-based data integrity auditing schemes often face challenges related to the high overhead of network maintenance and the rapid expansion of blocks, which can hinder the creation of new blocks. This paper introduces a novel data integrity framework leveraging blockchain expansion technology to mitigate these issues. Our approach proposes the deployment of smart contracts by clients and Cloud Service Providers (CSPs) across a main chain and its associated sub-chains. To ensure transactional finality and efficient processing, sub-chains periodically, or as needed, submit the outcomes of their intensive computations to the main chain. Furthermore, to enhance the user experience by minimizing direct communication with the CSP during audits, a non-interactive auditing mechanism is integrated. A reward pool system is also implemented to fortify data security. The efficacy of this design is rigorously evaluated through comprehensive analysis, encompassing storage efficiency, batch evaluation capabilities, and data consistency. Experimental results obtained from the Ethereum blockchain platform demonstrate that this scheme can effectively reduce both storage capacity demands and computational overhead.

Cloud, Blockchain expansion tech, Data Intigrity

"BLOCKCHAIN EXPANSION TECHNOLOGY-BASED DATA INTEGRITY AUDITING METHOD", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.12, Issue 11, page no.b462-b467, November-2025, Available :http://www.jetir.org/papers/JETIR2511159.pdf

"BLOCKCHAIN EXPANSION TECHNOLOGY-BASED DATA INTEGRITY AUDITING METHOD", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.12, Issue 11, page no. ppb462-b467, November-2025, Available at : http://www.jetir.org/papers/JETIR2511159.pdf