Cryptology ePrint Archive: Report 2021/475

Private Liquidity Matching using MPC

Shahla Atapoor and Nigel P. Smart and Younes Talibi Alaoui

Abstract: Many central banks, as well as blockchain systems, are looking into distributed versions of interbank payment systems, in particular the netting procedure. When executed in a distributed manner this presents a number of privacy problems. This paper studies a privacy preserving netting protocol to solve the gridlock resolution problem in such Real Time Gross Settlement systems. Our solution utilizes Multi-party Computation and is implemented in the SCALE MAMBA system, using Shamir secret sharing scheme over three parties in an actively secure manner. Our experiments show that, even for large throughput systems, such a privacy preserving operation is often feasible.

Category / Keywords: applications /

Date: received 13 Apr 2021

Contact author: Shahla Atapoor at kuleuven be, nigel smart@kuleuven be, younes talibialaoui@kuleuven be

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Version: 20210415:092551 (All versions of this report)

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