Fiat-Shamir in the Wild

Hieu Nguyen; Uyen Ho; Alex Biryukov

Paper 2024/1565

Fiat-Shamir in the Wild

Hieu Nguyen, University of Luxembourg

Uyen Ho, Verichains

Alex Biryukov, University of Luxembourg

Abstract

The Fiat-Shamir transformation is a key technique for removing interactivity from cryptographic proof systems in real-world applications. In this work, we discuss five types of Fiat-Shamir-related protocol design errors and illustrate them with concrete examples mainly taken from real-life applications. We discuss countermeasures for such vulnerabilities.

Metadata

Available format(s): PDF
Category: Attacks and cryptanalysis
Publication info: Published elsewhere. Minor revision. CSCML 2024
Keywords: cryptographic proof systems PLONK SNARK Fiat-Shamir
Contact author(s): alex biryukov @ uni lu
History: 2024-10-05: approved; 2024-10-04: received; See all versions
Short URL: https://ia.cr/2024/1565
License: CC BY

BibTeX

@misc{cryptoeprint:2024/1565,
      author = {Hieu Nguyen and Uyen Ho and Alex Biryukov},
      title = {Fiat-Shamir in the Wild},
      howpublished = {Cryptology {ePrint} Archive, Paper 2024/1565},
      year = {2024},
      url = {https://eprint.iacr.org/2024/1565}
}