Re: Sound card as a random number source ??

17 Dec 2003

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On Wed, 27 Nov 1996, Adam Shostack wrote:
...
Have you tried it without a mike plugged in?
Always think about failure modes.
Adam
Pavel Korensky wrote:
| Hello,
| 
| when I read about hardware random number generators in this mailing list, I got
| one idea. Maybe it sounds crazy, but is it possible to use soundcard
| (SoundBlaster for example) as a source for really random numbers ?
| What if I connect the input line of the soundcard with some external source of
| noise, like FM receiver or Dolby Surround decoder (with built-in white noise
| generator) or tape recorder with blank (erased) tape. It is possible to sample
| the sound (noise) and use the sampled values as a random numbers ? And how much
| random is this source ? 
| I tried to find some mentions about this method with altavista, but I didn't
| found anything.
| 
| Bye PavelK
|
Also, try reading from the PC speaker (this is usually a device on the
sound card) without the speaker as input... the leads usually make enough
of an antena to get all of your hardwares RF emissions, which should be
a good source of random numbers.

 --Deviant
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The best way to accelerate a Macintoy is at 9.8 meters per second per second.

Re: Sound card as a random number source ??

The Deviant