Verifiable Isogeny Walks: Towards an Isogeny-based Postquantum VDF

Verifiable Isogeny Walks: Towards an Isogeny-based Postquantum VDF
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可验证的同源性行走:迈向基于同源性的后量子 VDF

DOI:
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发表时间:
2021
期刊:
IACR Cryptology ePrint Archive
影响因子:
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通讯作者:
Mehdi Tibouchi
Mehdi Tibouchi
中科院分区:
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文献类型:
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作者:
J. Chávez;F. Rodríguez;Mehdi Tibouchi

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。在本文中,我们研究了构造后量子安全可验证延迟函数(vdf)的问题,特别是基于超奇异等同构。以前已经提出过基于等基因的VDF结构,但由于验证依赖于配对,它们被量子计算机打破了。我们提出了一种完全不同的方法,使用简洁的非交互参数(snarg),但专门针对等基因设置的算法结构进行了定制,以获得良好的渐近效率。我们获得了一个基于等基因的VDF结构,具有后量子安全性,准对数验证,并且不需要信任设置。作为构建块,我们还构造了F p 2上的超奇异图中的等根行走的非交互参数,这可能是独立的兴趣。
. In this paper, we investigate the problem of constructing postquantum-secure verifiable delay functions (VDFs), particularly based on supersingular isogenies. Isogeny-based VDF constructions have been proposed before, but since verification relies on pairings, they are broken by quantum computers. We propose an entirely different approach using succinct non-interactive arguments (SNARGs), but specifically tailored to the arithmetic structure of the isogeny setting to achieve good asymptotic efficiency. We obtain an isogeny-based VDF construction with postquantum security, quasi-logarithmic verification, and requiring no trusted setup. As a building block, we also construct non-interactive arguments for isogeny walks in the supersingular graph over F p 2 , which may be of independent interest.
DOI: 10.2140/obs.2020.4.39
发表时间: 2020-03
期刊: ArXiv
影响因子: --
作者:
D. Bernstein;L. D. Feo;Antonin Leroux;Benjamin A. Smith
通讯作者: D. Bernstein;L. D. Feo;Antonin Leroux;Benjamin A. Smith