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How does MixColumn collapse 4 active S-boxes into 1?

This question can also be answered in principle, since the minimum weight of the derived MDS code resulting from the MixColumns matrix is $5,$ this means that sometimes, given an input column weight ...
kodlu's user avatar
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How does MixColumn collapse 4 active S-boxes into 1?

How does on the Figure 9 MixColumn collapse 4 active S-boxes into 1? What a shaded box means is that byte is 'active' in the differential; that is, the two halves of the differential have different ...
poncho's user avatar
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