Hybrid Post-Quantum Signatures for Bitcoin and Ethereum:  A Protocol-Level Integration Strategy

Robert Campbell

doi:10.31585/jbba-9-1-(2)2026

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Peer Reviewed Research

December 12, 2025 BST

Hybrid Post-Quantum Signatures for Bitcoin and Ethereum: A Protocol-Level Integration Strategy

Robert Campbell Sr., PhD FBBA,

Post-quantum cryptographyBlockchain securityBitcoinEthereumDefensive downgradeQuantum resistanceGovernance challengesState bloat

JEL Classifications: C63 Computational Techniques - Simulation Modeling, E42 Monetary Systems - Standards - Regimes - Government and the Monetary System - Payment Systems, G32 Financing Policy - Financial Risk and Risk Management - Capital and Ownership Structure - Value of Firms - Goodwill, L86 Information and Internet Services - Computer Software, O33 Technological Change: Choices and Consequences - Diffusion Processes

ccby-4.0

• https://doi.org/10.31585/jbba-9-1-(2)2026

The JBBA

Campbell R. Hybrid Post-Quantum Signatures for Bitcoin and Ethereum: A Protocol-Level Integration Strategy. The JBBA. Published online December 12, 2025. doi:10.31585/jbba-9-1-(2)2026