[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Sound card as a random number source ??



-----BEGIN PGP SIGNED MESSAGE-----

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
   PGP KeyID = E820F015 Fingerprint = 3D6AAB628E3DFAA9 F7D35736ABC56D39

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


-----BEGIN PGP SIGNATURE-----
Version: 2.6.2

iQEVAwUBMpz7YTCdEh3oIPAVAQGHgAf6A9uZgb5as6BKUaoEs+e4SPjdzZ0yzbEt
nX7wNShQMIPD7VgwFhFQoKabvvf2jJchd6vBZqlvvaiOUqxf90IrUH3r1Ih+HcYl
XkOzjXU9UlhwjzPlB+JJYH1o4m0lAfaB8R8Qx86cv+oZM8KfVaIOlgRu2q07dpIe
5CGBPZIB3ehg5wZwGwTwNRvT4RRzOwNa+JcoAViksN8yHuX70y9IgQAyFCXdQXeg
2H/lni/R8Q/Yi2OFGEzjn2km93rcb8xMvl+N98ilXOUnO8ahXmjf69DOWR43Yn8h
VWW4dSQLdtjpP7reO06Vkeqxy4+SyKkB4gdCDw6F+eiR5ttr6mbEZA==
=BytF
-----END PGP SIGNATURE-----