Direct Construction of Optimal Rotational-XOR Diffusion Primitives
Zhiyuan Guo, Renzhang Liu, Si Jing Gao, Wenling Wu, Dongdai Lin · IACR Transactions on Symmetric Cryptology · 2017
As a core component of SPN block cipher and hash function, diffusion layer is mainly introduced by matrices built from maximum distance separable (MDS) codes. Up to now, most MDS constructions require to perform an equivalent or even exhaustive search. In this paper, we study the cyclic structure of rotational-XOR diffusion layer, a commonly used diffusion primitive over (