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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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