Dobraunig, Christoph, and Bart Mennink. “Tightness of the Suffix Keyed Sponge Bound”. IACR Transactions on Symmetric Cryptology 2020, no. 4 (December 10, 2020): 195-212. Accessed January 17, 2021. https://tosc.iacr.org/index.php/ToSC/article/view/8754.