AIM: Symmetric Primitive for Shorter Signatures with Stronger Security
Seongkwang Kim, Jincheol Ha, Mincheol Son, Byeonghak Lee, Dukjae Moon, Joohee Lee, Sangyub Lee, Jihoon Kwon, Jihoon Cho, H. Yoon, Jooyoung Lee · 2023
Post-quantum signature schemes based on the MPC-in-the-Head (MPCitH) paradigm are recently attracting significant attention as their security solely depends on the one-wayness of the underlying primitive, providing diversity for the hardness assumption in post-quantum cryptography. Recent MPCitH-friendly ciphers have been designed using simple algebraic S-boxes operating on a large field in order to improve the performance of the resulting signature schemes. Due to their simple algebraic structures, their security against algebraic attacks should be comprehensively studied.