Mella, Silvia, Joan Daemen, and Gilles Van Assche. “New Techniques for Trail Bounds and Application to Differential Trails in Keccak”. IACR Transactions on Symmetric Cryptology 2017, no. 1 (March 8, 2017): 329–357. Accessed February 6, 2025. https://tches.iacr.org/index.php/ToSC/article/view/597.