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Quantum-Resilient Privacy Ledger (QRPL): A Sovereign Digital Currency for the Post-Quantum Era

This preprint presents the architecture for the Quantum-Resilient Privacy Ledger (QRPL), a digital currency platform built for long-term quantum security. The a

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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. Authors: Serhan W. Bahar Publication: arXiv preprint Publication date: 2025-01-01

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Key findings

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

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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
Canonical knowledge ID: research:quantum-resilient-privacy-ledger-qrpl-a-sovereign-digital-currency-for-the-post-quantum-era