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I was reading the norx specification and came across this section, which provides some kind of statistics about the diffusion of the norx round function. However, I don't see how these values were calculated or what they really mean.

If I could also find out how the diffusion was visualized in the figure following the statistics, that would be greatly appreciated.

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  • $\begingroup$ I believe they posted the source code for their diffusion calculator $\endgroup$ – Richie Frame Mar 9 '16 at 12:01
  • $\begingroup$ @RichieFrame Do you have more information then that? I don't see mention of that in the pdf I linked to, or anything like it in in their master.zip source file from their website. $\endgroup$ – Ella Rose Mar 9 '16 at 18:41
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    $\begingroup$ github.com/norx/node $\endgroup$ – Richie Frame Mar 9 '16 at 21:18
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    $\begingroup$ The vis looks like a monochrome bitmap that was set to black for 1 and white for 0, then grayscaled, blurred, resized, and recolored $\endgroup$ – Richie Frame Mar 9 '16 at 21:23
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    $\begingroup$ If I was sure I would post an answer, as well as a method to replicate it. I believe they are indeed simply the bits of the block, their min/max/averages are probably with several test keys and nonces $\endgroup$ – Richie Frame Mar 10 '16 at 0:58

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