Preimage and Collision Attacks on Reduced Ascon Using Algebraic Strategies

ePrint Report: Preimage and Collision Attacks on Reduced Ascon Using Algebraic Strategies

Qinggan Fu, Ye Luo, Qianqian Yang, Ling Song

Ascon, a family of algorithms that supports hashing and authenticated encryption, is the winner of the NIST Lightweight Cryptography Project. In this paper, we propose an improved preimage attack against 2-round Ascon-XOF-64 with a complexity of $2^{32}$ via a better guessing strategy. Furthermore, in order to find a good guessing strategy efficiently, we build a MILP model and successfully extend …

algorithms ascon attack attacks collision cryptography encryption eprint report family hashing nist project report song strategies winner