A Closer Look at the S-box: Deeper Analysis of Round-Reduced ASCON-HASH

ePrint Report: A Closer Look at the S-box: Deeper Analysis of Round-Reduced ASCON-HASH

Xiaorui Yu, Fukang Liu, Gaoli Wang, Siwei Sun, Willi Meier

ASCON, a lightweight permutation-based primitive, has been
selected as NIST’s lightweight cryptography standard. ASCON-HASH is one of the hash functions provided by the cipher suite ASCON. At ToSC 2021, the collision attack on 2-round ASCON-HASH with time complexity 2^{103} was proposed. Due to its small rate, it is always required to utilize at least 2 message blocks …

analysis ascon box cipher cryptography eprint report functions hash hash functions nist report standard