Modern banking systems are heavily dependent on internet connectivity, making them vulnerable during network outages caused by cyberattacks, natural disasters, or warfare. This paper proposes a novel intranet-based backup system that enables customers to withdraw cash from their home branch ATMs during internet disruptions. The system utilizes local area network (LAN) infrastructure combined with blockchain technology to ensure secure, transparent, and tamper-proof transaction processing. Our proposed architecture implements a hybrid Byzantine Fault Tolerance (BFT) consensus algorithm to validate offline transactions and synchronize data once connectivity is restored. The system restricts withdrawals to predetermined limits at the customer's registered home branch, ensuring liquidity management and fraud prevention. Performance analysis demonstrates that the proposed system achieves 99.7% transaction success rate with an average processing time of 2.3 seconds while maintaining data integrity through cryptographic hashing. This research contributes to financial system resilience by providing a practical solution for maintaining critical banking services during emergency situations. Index Terms—Banking backup system, blockchain, Byzantine Fault Tolerance, disaster recovery, intranet, offline ATM, network resilience, emergency banking
Review Request Accepted
Dear Dr. Parin Patel,
Kindly complete the review of this paper within the given timeline. Thank you for accepting the review request and for your valuable support.
Revision Required
The paper presents an innovative and practical solution for emergency cash withdrawals during internet outages by using a blockchain-enabled intranet banking backup system. The concept is highly relevant, and the proposed hybrid BFT consensus, LAN-based processing, and controlled withdrawal limits make the approach technically strong and suitable for real-world banking resilience.
Required Revisions:
Please make the following improvements for clarity and completeness:
Implementing these steps will significantly improve the technical clarity and publication readiness of the paper.
Revision Status: Minor Revision
Review Request Accepted
Dear Author,
Please provide the revised version of your paper based on the comments and suggestions given by the reviewer. Kindly address all the required revisions, including system architecture details, hybrid BFT explanation, security analysis, literature review updates, and performance testing clarification. Once the revisions are completed, please resubmit the updated manuscript for further evaluation.
Review Request Accepted
📎 File shared: 1762517584_v1_0WF9Qx (1).docx
Review Request Accepted
Dear Reviewer,
Thank you for your valuable feedback and constructive suggestions. We have carefully reviewed all the comments and have incorporated the required revisions into the updated manuscript. The system architecture diagram has been added, and a detailed explanation of the hybrid BFT consensus mechanism—including node roles and validation flow—has been clearly outlined. We have expanded the security analysis to address double-spending risks, offline fraud prevention, and data integrity measures.
Additionally, the literature review section has been strengthened with recent studies related to offline blockchain systems, disaster-resilient banking models, and BFT frameworks. The performance testing section has been updated with complete details of the testing environment, number of transactions processed, and benchmark comparisons. All revisions have been implemented as per the reviewer’s recommendations. We appreciate your guidance and request you to kindly review the revised manuscript.
Approved
Dear Author,
Thank you for submitting the revised manuscript and addressing all the review comments in a clear and detailed manner. After evaluating the updated version, I am pleased to inform you that the revisions have been satisfactorily completed.
Final Reviewer Comments:
The addition of the system architecture diagram, expanded explanation of the hybrid BFT consensus, improved security analysis, and enriched literature review have significantly strengthened the paper. The performance testing details are now clearly presented and enhance the technical credibility of the proposed system. The manuscript now meets the publication standards and is accepted for final processing.
Patel Parin Reviewer