Welcome to the resource topic for 2019/951
Title:
Collisions on Feistel-MiMC and univariate GMiMC
Authors: Xavier Bonnetain
Abstract:MiMC and GMiMC are families of MPC-friendly block ciphers and hash functions. In this note, we show that the block ciphers MiMC-2n/n (or Feistel-MiMC) and univariate GMiMC are vulnerable to an attack which allows a key recovery in 2^{n/2} operations. This attack, which is reminiscent of a slide attack, only relies on their weak key schedules, and is independent of the round function (x^3 here) and the number of rounds.
ePrint: https://eprint.iacr.org/2019/951
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