[Resource Topic] 2024/1624: Double-Matrix: Complete Diffusion in a Single Round with (small) MDS Matrices

Welcome to the resource topic for 2024/1624

Title:
Double-Matrix: Complete Diffusion in a Single Round with (small) MDS Matrices

Authors: Jorge Nakahara Jr

Abstract:

This paper describes a simple idea to improve (text) diffusion in block ciphers that use MDS codes but that take more than
a single round to achieve full (text) diffusion. The Rijndael cipher family is used as an example since it comprises ciphers
with different state sizes.
A drawback of the new approach is the additional computational cost, but it is competitive compared to large MDS matrices
used in the Khazad and Kuznyechik ciphers.

ePrint: https://eprint.iacr.org/2024/1624

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