arXiv:2603.05005 · v2

A Practical Post-Quantum Distributed Ledger Protocol for Financial Institutions

首次提交 2026-03-05 17:54

版本更新 2026-11-07 00:13

雷达观测 2026-11-09 13:22

摘要

Traditional financial institutions face inefficiencies that can be addressed by distributed ledger technology. However, a primary barrier to adoption is the privacy concerns surrounding publicly available transaction data. Existing private protocols for distributed ledger that focus on the Ring-CT model are not suitable for adoption for financial institutions. We propose a post-quantum, lattice-based transaction scheme for encrypted ledgers which better aligns with institutions' requirements for confidentiality and audit-ability. The construction leverages various zero-knowledge proof techniques, and introduces a new method for equating two commitment messages, without the capability to open one of the commitment during the re-commitment. Subsequently, we build a publicly verifiable transaction scheme that is efficient for single or multi-assets, by introducing a new compact range-proof. We then provide a security analysis of it. The techniques used and the proofs constructed could be of independent interest.

作者备注：ACM Conference on Post-Quantum and Quantum-based Security 2026