On Singh et. al.'s "Collatz Hash"

Joe Doyle

Paper 2025/1979

On Singh et. al.'s "Collatz Hash"

Joe Doyle, Trail of Bits

Abstract

Singh et. al. recently uploaded a preprint describing a new hash function inspired by the Collatz Conjecture. After performing some cursory tests, the proposed function appears to be completely unsuitable for cryptographic purposes, and should not be used.

Metadata

Available format(s): PDF
Category: Attacks and cryptanalysis
Publication info: Preprint.
Contact author(s): joseph doyle @ trailofbits com
History: 2025-10-25: approved; 2025-10-22: received; See all versions
Short URL: https://ia.cr/2025/1979
License: CC BY

BibTeX

@misc{cryptoeprint:2025/1979,
      author = {Joe Doyle},
      title = {On Singh et. al.'s "Collatz Hash"},
      howpublished = {Cryptology {ePrint} Archive, Paper 2025/1979},
      year = {2025},
      url = {https://eprint.iacr.org/2025/1979}
}