Efficient Verification of the Wesolowski Verifiable Delay Function for Distributed Environments

Vidal Attias; Luigi Vigneri; Vassil Dimitrov

Paper 2022/520

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.

Metadata

Available format(s): PDF
Publication info: Preprint. MINOR revision.
Keywords: multiexponentiation VDF OpenSSL prime testing hashing
Contact author(s): vidal attias @ gmail com
History: 2022-05-02: received
Short URL: https://ia.cr/2022/520
License: 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}
}