Cauchois, V., Gomez, C., & Thomas, G. (2019). General Diffusion Analysis: How to Find Optimal Permutations for Generalized Type-II Feistel Schemes. IACR Transactions on Symmetric Cryptology, 2019(1), 264–301. https://doi.org/10.13154/tosc.v2019.i1.264-301