Paper 2023/1834 Original: eprint.iacr.org/2023/1834 ↗
Building a BBB Pseudorandom Permutation using Lai-Massey Networks
Abstract
In spite of being a popular technique for designing block ciphers, Lai-Massey networks have received considerably less attention from a security analysis point of view than Feistel networks and Substitution-Permutation networks. In this paper we study the beyond-birthday-bound (BBB) security of Lai-Massey networks with independent random round functions against chosen-plaintext adversaries. Concretely, we show that five rounds are necessary and sufficient to achieve BBB security.
Metadata
- Available format(s)
PDF- Category
- Foundations
- Publication info
- Preprint.
- History
- 2025-04-20: last updated
- 2023-11-29: published
- Short URL
- https://ia.cr/2023/1834
- License
- https://creativecommons.org/licenses/by-nc-sa/4.0/
BibTeX
@misc{cryptoeprint:2023/1834,
author = {Ritam Bhaumik and Mohammad Amin Raeisi},
title = {Building a BBB Pseudorandom Permutation using Lai-Massey Networks},
howpublished = {Cryptology {ePrint} Archive, Paper 2023/1834},
year = {2023},
url = {https://eprint.iacr.org/2023/1834}
}