Paper 2024/1218 Original: eprint.iacr.org/2024/1218 ↗
A Note on the use of the Double Boomerang Connectivity Table (DBCT) for Spotting Impossibilities
Abstract
In this short note we examine one of the impossible boomerang distinguishers of Skinny-128-384 provided by Zhang, Wang and Tang at ToSC 2024 Issue 2 and disprove it. The issue arises from the use of the Double Boomerang Connectivity Table (DBCT) as a tool to establish that a boomerang switch over 2 rounds has probability zero, whereas the DBCT only covers specific cases of difference propagation, missing a large set of events that might make the connection possible. We study in details the specific instance provided by Zhang et al. and display one example of a returning quartet that contradicts the impossibility.
Metadata
- Available format(s)
PDF- Category
- Secret-key cryptography
- Publication info
- Preprint.
- History
- 2024-07-30: last updated
- 2024-07-30: published
- Short URL
- https://ia.cr/2024/1218
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2024/1218,
author = {Xavier Bonnetain and Virginie Lallemand},
title = {A Note on the use of the Double Boomerang Connectivity Table (DBCT) for Spotting Impossibilities},
howpublished = {Cryptology {ePrint} Archive, Paper 2024/1218},
year = {2024},
url = {https://eprint.iacr.org/2024/1218}
}