Paper 2016/1172 Original: eprint.iacr.org/2016/1172 ↗
On the Provable Security of the Tweakable Even-Mansour Cipher Against Multi-Key and Related-Key Attacks
Abstract
Cogliati et al. introduced the tweakable Even-Mansour cipher constructed from a single permutation and an almost-XOR-universal (AXU) family of hash functions with tweak and key schedule. Most of previous papers considered the security of the (iterated) tweakable Even-Mansour cipher in the single-key setting. In this paper, we focus on the security of the tweakable Even-Mansour cipher in the multi-key and related-key settings. We prove that the tweakable Even-Mansour cipher with related-key-AXU hash functions is secure against multi-key and related-key attacks, and derive a tight bound using H-coefficients technique, respectively. Our work is of high practical relevance because of rekey requirements and the inevitability of related keys in real-world implementations.
Metadata
- Available format(s)
PDF- Category
- Secret-key cryptography
- Publication info
- Preprint.
- History
- 2016-12-28: last updated
- 2016-12-28: published
- Short URL
- https://ia.cr/2016/1172
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2016/1172,
author = {Ping Zhang and Honggang Hu},
title = {On the Provable Security of the Tweakable Even-Mansour Cipher Against Multi-Key and Related-Key Attacks},
howpublished = {Cryptology {ePrint} Archive, Paper 2016/1172},
year = {2016},
url = {https://eprint.iacr.org/2016/1172}
}