Re: How can you verify the randomness that's coming from a hardware?
Do you already have a plan for evaluating the entropy of it?
I used https://www.fourmilab.ch/random/ in the past to measure the "entropy" of linux /dev/random from one of my machines. I assume I would do the same thing with this one. Their ent program the output is kind of confusing except for the option that shows character counts. Which is what I basically go off of. They claim:
We interpret the percentage as the degree to which the sequence tested is suspected of being non-random. If the percentage is greater than 99% or less than 1%, the sequence is almost certainly not random.
But they don't explain why or how.
I did my own chi-square test and it concluded do not reject the null hypothesis (I already knew it would though based on the histogram output) so I'm not worried about it. Their program doesn't appear to be open source all you get is an exe file.
With all of that said, to have RDSEED the CPU needs to be intel 5th gen cpu or higher. only one of my machines is that
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I mentioned it earlier in this thread; I think it's just much easier to trust physical entropy (like dice throws) or a relatively straight-forward open-source 'avalanche' circuit on a PCB.
Yeah physical entropy is the way to go for low volume needs which most of us fall into. I trust that the most at the end of the day. Not any of these electronic methods as good as they might seem, you can't really see what is going on. You have to trust what you can't see. Trust past results, trust that it is performing the same as past results. The electronic methods are fun though to investigate. And they might find uses in higher volume applications.