Automated Meet-in-the-Middle Attack Goes to Feistel

ePrint Report: Automated Meet-in-the-Middle Attack Goes to Feistel

Qingliang Hou, Xiaoyang Dong, Lingyue Qin, Guoyan Zhang, Xiaoyun Wang

Feistel network and its generalizations (GFN) are another important building blocks for constructing hash functions, e.g., Simpira v2, Areion, and the ISO standard Lesamnta-LW. The Meet-in-the-Middle (MitM) is a general paradigm to build preimage and collision attacks on hash functions, which has been automated in several papers. However, those automatic tools mostly focus on the hash function with Substitution-Permutation network (SPN) as …

attack automated build collision eprint report functions general hash hash functions important iso mitm network paradigm report standard wang