A Quantum-Safe, Interoperable and Decentralized Payment Infrastructure for the Post-Classical Era as a Strategic Framework for Secure Global Transactions
Abstract
The rise of quantum computing introduces a profound threat to existing digital security frameworks, particularly those that underpin modern payment systems. Current cryptographic standards such as RSA, ECC, and ECDSA are susceptible to being broken by quantum algorithms like Shor's and Grover's, jeopardizing the confidentiality, authenticity, and integrity of transactions across financial networks. This study presents a comprehensive investigation into the design, feasibility, and architecture of a universal quantum-safe payment platform capable of processing all types of digital transactions - ranging from mobile money and bank transfers to blockchain-based and card payments - through existing delivery channels on a decentralized infrastructure. The research synthesizes current developments in post-quantum cryptography (PQC), including lattice-based, hash-based, and code-based algorithms, and evaluates their suitability for real-time financial systems. Drawing from real-world case studies such as BIS Project Tourbillon and central bank trials, the paper explores the technical and regulatory challenges of integrating PQC into payment ecosystems. The proposed platform incorporates a permissioned distributed ledger, API-level compatibility with legacy financial protocols, and an identity-governed, modular architecture that enables cryptographic agility and policy compliance.Through architectural modeling and critical analysis, this research provides a forward-looking blueprint for building quantum-resilient financial infrastructure. It concludes that while performance and governance hurdles remain, quantum-safe payment networks are both technically feasible and urgently necessary. This work aims to equip stakeholders - especially fintech firms, banks, and regulatory bodies - with a detailed roadmap for transitioning to secure, interoperable, and scalable payment systems in the quantum era.
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References
2. Bank for International Settlements [BIS]. (2023a). Project Leap: quantum-proofing the financial system.
3. Bank for International Settlements [BIS]. (2023b). Project Tourbillon: exploring privacy, security and scalability for CBDCs.
4. Deloitte. (2020). Quantum computers and the Bitcoin blockchain.
5. Entrust. (2025). The post-quantum era demands quantum-safe payments.
6. Financial Services Information Sharing and Analysis Center [FS-ISAC]. (2024). Quantum threat preparedness recommendations.
7. National Institute of Standards and Technology [NIST]. (2024). PQC final standardization: CRYSTALS-Kyber, Dilithium, Falcon, SPHINCS+.
8. NACHA Payments Innovation Alliance. (2024). Protecting payments in the quantum era.
9. PQShield. (2025). Identity and payments: Preparing for the quantum threat.
10. Scientific Reports. (2023). Quantum-resistance in blockchain networks.
11. Utimaco. (2024). Types of post-quantum cryptography public key schemes.
12. World Economic Forum. (2024). Safeguarding CBDC systems in the post-quantum age.
13. Adeoye, S. (2025). Blockchain-enabled, post-quantum cryptographic framework for securing electronic health records: A next-generation approach to healthcare data.
14. Turpu, R. R. (2024). Fortifying banking transactions: Harnessing post-quantum cryptography for next-generation security.
15. Agrawal, S. (2024). Harnessing quantum cryptography and artificial intelligence for next-gen payment security: A comprehensive analysis in distributed ledger environments.
16. Nwaga, P., & Idima, S. (2024). Post-quantum cryptographic algorithms for secure communication in decentralized blockchain and cloud infrastructure.
17. Das, P. (2025). Quantum computing in payments security: Preparing for the post-quantum era.
18. de Haro Moraes, D., Pereira, J. P. A., & Grossi, B. E. (2024). Applying post-quantum cryptography algorithms to a DLT-based CBDC infrastructure: Comparative and feasibility analysis.
19. Weinberg, A. I., Petratos, P., & Faccia, A. (2024). Will central bank digital currencies (CBDC) and blockchain cryptocurrencies coexist in the post-quantum era?.
20. Andriani, C., Bencivelli, L., & Castellucci, A. (2024). The quantum challenge: Implications and strategies for a secure financial system.
21. Castiglione, A., Esposito, J. G., & Loia, V. (2024). Integrating post-quantum cryptography and blockchain to secure low-cost IoT devices.
22. Mansoor, K., Afzal, M., Iqbal, W., & Abbas, Y. (2025). Securing the future: Exploring post-quantum cryptography for authentication and user privacy in IoT devices.
Copyright (c) 2025 Md Abul Mansur
This work is licensed under a Creative Commons Attribution 4.0 International License.
