# Quantum-Resilient Privacy Ledger (QRPL): A Sovereign Digital Currency for the Post-Quantum Era Content type: Research Paper Summary: This preprint presents the architecture for the Quantum-Resilient Privacy Ledger (QRPL), a digital currency platform built for long-term quantum security. The author details the implementation of a privacy-preserving layer that utilizes lattice-based cryptographic commitments. Unlike existing privacy coins that rely on ECC, QRPL uses multivariate public-key cryptosystems to facilitate secure, untraceable transactions that remain protected against future decryption efforts. The methodology focuse Key concepts: Serhan W. Bahar, cbdc, privacy, lattice-based, cryptocurrency, quantum-resilient
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Quantum-Resilient Privacy Ledger (QRPL): A Sovereign Digital Currency for the Post-Quantum Era

Serhan W. Bahar

arXiv preprintJanuary 2025

Abstract

This preprint presents the architecture for the Quantum-Resilient Privacy Ledger (QRPL), a digital currency platform built for long-term quantum security. The author details the implementation of a privacy-preserving layer that utilizes lattice-based cryptographic commitments. Unlike existing privacy coins that rely on ECC, QRPL uses multivariate public-key cryptosystems to facilitate secure, untraceable transactions that remain protected against future decryption efforts. The methodology focuses on balancing the computational intensity of quantum-safe proofs with the needs of a performant, high-frequency currency. The paper describes a state-based approach to validation that minimizes the risk of double-spending while maintaining confidentiality, suggesting a viable path forward for central bank digital currencies (CBDCs) and sovereign financial assets in a post-quantum world.

Key Findings

  • 1Multivariate cryptography provides a scalable alternative to ECC for privacy-centric ledgers.
  • 2State-based validation models mitigate double-spending risks in quantum-safe environments.
  • 3QRPL architecture supports sovereign requirements for privacy and auditability.
  • 4The ledger achieves a balance between security and transaction throughput.

Topics

cbdcprivacylattice-basedcryptocurrencyquantum-resilient
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Citation

Serhan W. Bahar (2025). Quantum-Resilient Privacy Ledger (QRPL): A Sovereign Digital Currency for the Post-Quantum Era. arXiv preprint. https://arxiv.org/abs/2507.09067

BibTeX

@misc{quantumresilient2025,
  title = {Quantum-Resilient Privacy Ledger (QRPL): A Sovereign Digital Currency for the Post-Quantum Era},
  author = {Serhan W. Bahar},
  year = {2025},
  howpublished = {\url{https://arxiv.org/abs/2507.09067}},
}

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