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Richard Kettlewell <invalid@invalid.invalid> wrote:Richard Kettlewell <invalid@invalid.invalid> writes:Exactly! All the stuff about lava lamps, helium motion inside hard^generators
disks, etc is just gimmicks. Real random numbers are tiny
electroniccomponents built into CPUs, HSMs, etc.>
Strictly I should probably say “entropy sourcesâ€_, since there’s
generally a DRBG between the electronics and the application, as
well.
The problem with those genuine random number generators is that they
are usually comparatively slow. They take milliseconds to spit out a
number, sometimes tens or even hundreds of them. So we use the
genuine RNG to seed a PNG in situations where we don't need complete
randomness but need pretty good randomness and need a lot of it fast.
Knuth has a discussion of this.
--scott
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