Bao, Zhenzhen, Lin Ding, Jian Guo, Haoyang Wang, and Wenying Zhang. 2020. “Improved Meet-in-the-Middle Preimage Attacks Against AES Hashing Modes”. IACR Transactions on Symmetric Cryptology 2019 (4), 318-47. https://doi.org/10.13154/tosc.v2019.i4.318-347.