A Practical Post-Quantum Distributed Ledger Protocol for Financial Institutions
Abstract
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.
Cite
@article{arxiv.2603.05005,
title = {A Practical Post-Quantum Distributed Ledger Protocol for Financial Institutions},
author = {Yeoh Wei Zhu and Naresh Goud Boddu and Yao Ma and Shaltiel Eloul and Giulio Golinelli and Yash Satsangi and Rob Otter and Kaushik Chakraborty},
journal= {arXiv preprint arXiv:2603.05005},
year = {2026}
}