Multi-Blockchain Backup & Restore System with Zero-Knowledge Proofs (ZKPs)
Ishraq Samiha, Swapnil Chowdhury · 2025
Maintaining data authenticity, security, reliability, and integrity is challenging in decentralized storage and backup systems. Existing blockchain-based backup systems majorly depend on centralized off-chain storage or single-chain implementation, which leaves them vulnerable to security flaws, high expenses, and single points of failure. In this study, a multi-blockchain backup and restore system incorporates Zero-Knowledge Proofs (ZKPs) for data integrity verification and threshold cryptography for secure access control. Unlike traditional blockchain storage, this system distributes backup metadata across multiple blockchains (Ethereum, Hyperledger) while storing encrypted data in decentralized storage (IPFS). ZKPs provide integrity verification without revealing data, hence improving privacy and security. Also, Shamir’s Secret Sharing provides multi-party authentication for restoration, prohibiting unauthorized access. The system outperforms existing models by improving fault tolerance, privacy, and security compliance while reducing storage costs. Experimental evaluations compare the storage efficiency, retrieval speed, and security of this method against existing blockchain-based storage methods. This work proposes an innovative decentralized backup and restore system for managing security, efficiency, and redundancy, offering a robust solution for secure and verifiable data management in blockchain environments.