Bao, Zhenzhen, Jian Guo, and Lei Wang. “Functional Graphs and Their Applications in Generic Attacks on Iterated Hash Constructions”. IACR Transactions on Symmetric Cryptology 2018, no. 1 (March 1, 2018): 201–253. Accessed April 20, 2024. https://tosc.iacr.org/index.php/ToSC/article/view/850.