Improved Preimage Attacks on 3-Round Keccak-224/256

• Published in: IACR Transactions on Symmetric Cryptology Vol. 2021; no. 3; pp. 84 - 101
• Main Authors: Lin, Xiaoen, He, Le, Yu, Hongbo
• Format: Journal Article
• Language: English
• Published: Ruhr-Universität Bochum 17.09.2021
• Subjects: Keccak; Linear structure; Preimage attack; SHA-3

In this paper, we provide an improved method on preimage attacks of standard 3-round Keccak-224/256. Our method is based on the work by Li and Sun. Their strategy is to find a 2-block preimage instead of a 1-block one by constructing the first and second message blocks in two stages. Under this stra...