Automatic Search of Rectangle Attacks on Feistel Ciphers: Application to WARP

• Published in: IACR Transactions on Symmetric Cryptology Vol. 2022; no. 2; pp. 113 - 140
• Main Authors: Lallemand, Virginie, Minier, Marine, Rouquette, Loïc
• Format: Journal Article
• Language: English
• Published: Ruhr Universität Bochum 10.06.2022; Ruhr-Universität Bochum
• Subjects: Artificial Intelligence; Boomerang attack; Computer Science; Cryptanalysis; Cryptography and Security; Feistel cipher; WARP; Feistel cipher; WARP; Cryptanalysis; Boomerang attack

In this paper we present a boomerang analysis of WARP, a recently proposed Generalized Feistel Network with extremely compact hardware implementations. We start by looking for boomerang characteristics that directly take into account the boomerang switch effects by showing how to adapt Delaune et al...