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Edit: I found it for $36 elsewhere. :D
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this post was submitted on 11 Nov 2024
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Yeah, not USB but in principle it's the same whether it's PCI or whatever. There's no way to prove an RNG is truly random really just have to rely on validating subsets of its output look random. NIST has published recommendations for sampling RNGs.
Here's the title:
I don't think there's a real need unless it's regulated to need some dedicated HW RNG.
Very precise answer, thank you.
How about a simple test to make sure it didn't break and start spitting out all zeroes. Read a few lines from
/dev/random?I might be wrong about this but my understanding is that on Linux you'd pipe the output of this in somewhere and tell the kernel to use it for entropy, and if it gets insufficient entropy it realizes this and starts producing random bits slower. So like normally the Linux kernel samples mouse movements for randomness, and so it makes more random bits the more you jiggle your mouse. These hardware RNGs are best used for headless servers that don't have as reliable entropy at their disposal.