Date: Sun, 21 May 2000 23:55:21 +0100 (BST)
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
> What if you simply tuned a cheap FM receiver to just static and fed
> that into a soundcard. Then reading from /dev/dsp or something would
> return pretty good random data, right ?
An attacker with a radio transmitter...
Or an attacker with a radio receiver (if the source of randomness you
use is available to the attacker, it's useless, for obvious reasons).
You also have to worry about filtering out the 60Hz (or 50Hz depending
on your location :-) hum. The 60/50Hz hum is rather non-random. In
fact, the power companies work rather hard to make sure it's quite
regular.
- Ted
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