Grassi, Lorenzo, Dmitry Khovratovich, Sondre Rønjom, and Markus Schofnegger. 2022. “The Legendre Symbol and the Modulo-2 Operator in Symmetric Schemes over Fnp: Preimage Attack on Full Grendel”. IACR Transactions on Symmetric Cryptology 2022 (1):5-37. https://doi.org/10.46586/tosc.v2022.i1.5-37.