An Algorithm Substitution Attack on Fiat-Shamir Signatures Based on Lattice Jinhui LIU, Yong YU, Fusheng WU, Yuehua CHENG and Huanguo ZHANG Wuhan Univ. J. Nat. Sci., 27 1 (2022) 17-25 Published online: 16 March 2022 DOI: 10.1051/wujns/2022271017