A Practical Post-Quantum Distributed Ledger Protocol for Financial Institutions

• URL: http://arxiv.org/abs/2603.05005v1
• Date: Thu, 05 Mar 2026 09:54:12 GMT
• Title: A Practical Post-Quantum Distributed Ledger Protocol for Financial Institutions
• Authors: Yeoh Wei Zhu, Naresh Goud Boddu, Yao Ma, Shaltiel Eloul, Giulio Golinelli, Yash Satsangi, Rob Otter, Kaushik Chakraborty,
• Abstract summary: Traditional financial institutions face inefficiencies that can be addressed by distributed ledger technology.<n>A primary barrier to adoption is the privacy concerns surrounding publicly available transaction data.<n>We propose a post-quantum, lattice-based transaction scheme for encrypted ledgers.
• Score: 8.147413857595303
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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.

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