Two of many criteria of a good MDS matrix are being involutory and having few different elements. This paper investigates the number of different entries in an involutory MDS matrices of order 1, 2, 3, and 4 over finite fields of characteristic two. There are at least three and four different elements in an involutory MDS matrices with, respectively, order three and four, over finite fields of characteristic two.

翻译：良好的MDS矩阵在许多标准中有两个标准是非进化性的,没有多少不同的要素,本文调查了在一、二、三和四等非进化性MDS矩阵中不同条目的数量,其中第1、2、三和四项超过了特性二的有限字段。