Welcome to the resource topic for 2016/1172
Title:
On the Provable Security of the Tweakable Even-Mansour Cipher Against Multi-Key and Related-Key Attacks
Authors: Ping Zhang, Honggang Hu
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.
ePrint: https://eprint.iacr.org/2016/1172
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