Edit: I found it for $36 elsewhere. :D
this post was submitted on 11 Nov 2024
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I dont remember where but I recall that Cloudfare dont use computers to generate random numbers because its literally impossible. It is always mathematics so its predictable , hard yes but predictable. Instead Cloudfare uses lava lamps movements and calculate that , as it is very random. I will look for the article so don't take my word for it.
The noise coming from an open microphone has enough entropy for what we'd usually assume to be random.
It is possible to hit a bottleneck getting random numbers, but there's /dev/urandom which shouldn't block it'll just keep outputting without enough entropy to guarantee pseudorandomness.
Usually you'll know if you're hitting one of those bottlenecks, probably it'll only come up in production or hopefully in load testing.