hardware RNG
Eugen Leitl
eugen at leitl.org
Mon Sep 9 13:01:19 PDT 2013
On Mon, Sep 09, 2013 at 04:32:35PM -0300, Juan Garofalo wrote:
> Wouldn't it be possible to build a RNG using something like a zener diode and a $2 microcontroller?
I would use a cheap analog circuit like http://www.maximintegrated.com/app-notes/index.mvp/id/3469
and let your audio card to A/D. Bonus points: there are already entropy gathering daemons which
use soundcard input.
Even cheaper: hang a cheap microphone into a fan exhaust. Noise definitely not white,
but certainly more entropy than just looking at lowest bits of A/D.
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