> Thermal noise is probably your most easily available source of
> randomness. The hard part is estimating the amount of entropy
> derivable, unfortunately; electrical interference can cause the
> entropy to be less than what you would expect. The /dev/random mixing
> function takes care of removing the predictable stuff, but you still
> need to get a value (conservative is fine) for the amount of entropy
> actually available.
Yep. Most risky is a receiver in a Farraday cage. On most buildings this
problem is also a case.
I'm planning of implementing a hardware random device someday.. When I
have some spare time (which is about a few weeks).
>
> -hpa
>
Igmar
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