This noise should probably be whitened by passing through something
like MD5 or SHA in cipher-feedback mode. Also, what if it's not noisy
in the office? I suggest using only the least-significant bit and not
bothering with the microphone. Disconnect it and use the amplifier/ADC
quantum noise. Then you know how much entropy you're accumulating
regardless of ambiend changes.
I have offered to submit the WebSite Pro audio-based RNG for Win32 to
the openssl-dev list, but no takers yet.
-- Bob
"Simon J. Gerraty" wrote:
> Yep this is what I do. I have a host with a sound card located in a busy
> office. I grab sound samples from this system at regular intervals.
> The script below takes care of the grunt work ...
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