Quantum Blockchain: A Theoretical Framework and Applications in Cryptocurrency

Yosef Bonaparte ()
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Yosef Bonaparte: Business School, University of Colorado, Denver, CO 80202, USA

IJFS, 2025, vol. 13, issue 4, 1-12

Abstract: Blockchain technology has emerged as the backbone of cryptocurrencies and decentralized finance, yet its long-term resilience is increasingly threatened by advances in quantum computing. Quantum algorithms, such as Shor’s algorithm, can undermine public-key cryptography, while Grover’s algorithm accelerates brute-force search, weakening proof-of-work schemes. In this paper, we propose a Quantum Blockchain Framework that integrates quantum communication protocols, quantum consensus mechanisms, and quantum-resistant cryptography. We construct a theoretical model of quantum-secured distributed ledgers, where qubits, entanglement, and quantum key distribution (QKD) enhance security and efficiency. Applications to cryptocurrency are explored, highlighting how quantum blockchain can mitigate security risks, improve consensus speed, and enable quantum-native digital assets.

Keywords: quantum blockchain; cryptocurrencies; quantum computing; distributed ledger technology; quantum cryptography; consensus mechanisms; quantum key distribution (QKD); FinTech innovation (search for similar items in EconPapers)
JEL-codes: F2 F3 F41 F42 G1 G2 G3 (search for similar items in EconPapers)
Date: 2025
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