Hybrid Cryptographic Architecture for Multi-Platform Blockchain Document Signing: Technical Innovation and Cross-Chain Interoperability

Abstract

This paper presents a novel hybrid cryptographic architecture for blockchain-based document signing that addresses fundamental interoperability challenges across heterogeneous blockchain platforms. The proposed system introduces technical innovations including a unified cryptographic protocol combining classical ECDSA signatures with post-quantum Dilithium algorithms, biometric authentication mechanisms, and zero-knowledge proof systems. The architecture enables seamless document signing across Ethereum, Hyperledger Fabric, and Solana networks through standardized smart contract interfaces and novel cross-chain verification protocols. Key technical contributions include mathematical formalization of hybrid signature schemes, implementation of privacy-preserving verification using NIZK proofs, and design of platform-agnostic verification mechanisms that maintain cryptographic security across different consensus architectures while achieving sub-second verification times.