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http://dx.doi.org/10.13089/JKIISC.2021.31.3.517

A Post-Quantum Multi-Signature Scheme  

Ko, Chanyoung (Korea University)
Lee, Youngkyung (Korea University)
Lee, Kwangsu (Sejong University)
Park, Jong Hwan (Sangmyung University)
Publication Information
Journal of the Korea Institute of Information Security & Cryptology / v.31, no.3, 2021 , pp. 517-526 More about this Journal
Abstract
Recently, the acceleration of the development of quantum computers has raised the issue of the safety of factorization and discrete logarithm based digital signature schemes used in existing Internet environments. To solve the issue, several digital signature schemes are presented that are safe in post-quantum computing environments, including standardization work by the National Institute of Standards and Technology(NIST). In this paper, we design and present a multi-signature scheme based on the TACHYON announced by Behnia et al. in 2018 CCS conference, and prove the security. Multi-signature schemes are key techniques that can distribute the dependence of cryptocurrency-wallet on private keys in the cryptocurrency field, which has recently received much attention as an digital signature application, and many researchers and developers have recently been interested. The multi-signature scheme presented in this paper enables public key aggregation in a plain public key model, which does not require additional zero-knowledge proof, and can construct an effective scheme with only an aggregated public key.
Keywords
Post-quantum; multi-signature; key aggregation; generalized compact knapsack;
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