### Efficient Verification of the Wesolowski Verifiable Delay Function for Distributed Environments

Vidal Attias, Luigi Vigneri, and Vassil Dimitrov

##### Abstract

Verifiable Delay Functions (VDFs) are a set of new crypto- graphic schemes ensuring that an agent has spent some time (evaluation phase) in a unparalleled computation. A key requirement for such a construction is that the verification of the computation’s correctness has to be done in a significantly shorter time than the evaluation phase. This has led VDFs to recently gain exposure in large-scale decentralized projects as a core component of consensus algorithms or spam-prevention mechanisms. In this work, due to the increasing relevance and the lack of literature, we will focus on the optimization of the verification phase of Wesolowski’s VDF and provide a three-axis of improvement concerning multi-exponentiation computation, prime testing techniques, and hash- ing tricks. We will show that our optimizations reduce the computation time of the verification phase between 12% and 35% for the range of parameters considered.

Available format(s)
Publication info
Preprint. MINOR revision.
Keywords
multiexponentiationVDFOpenSSLprime testinghashing
Contact author(s)
vidal attias @ gmail com
History
Short URL
https://ia.cr/2022/520

CC BY

BibTeX

@misc{cryptoeprint:2022/520,
author = {Vidal Attias and Luigi Vigneri and Vassil Dimitrov},
title = {Efficient Verification of the Wesolowski Verifiable Delay Function for Distributed Environments},
howpublished = {Cryptology ePrint Archive, Paper 2022/520},
year = {2022},
note = {\url{https://eprint.iacr.org/2022/520}},
url = {https://eprint.iacr.org/2022/520}
}

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