Generate entropy from audio output
Audio-entropyd generates entropy-data for the /dev/random device.
This is a small program to reseed the Linux kernel random number
generator with data from soundcard.
**** This is an alpha release intended for peer review.
**** DO NOT use this on a production server.
Audio is ready periodically from a stereo soundcard, the difference
is taken between the left and right channels, the difference is
hashed and credited to the KRNG.
Using the di
Updates should be found at http://www.vanheusden.com/mirrors/
All changes by Folkert van Heusden & Udo van den Heuvel
I noticed that my firewall's kernel, running audio-entropyd,
logged 'Sound: Recording overrun' although the audio-entropyd
was sleeping. After some experimenting I found out that when
the dsp_fd was closed during the sleep the errors went away.
- Manual page
- Peer review
- Build in statistical tests
- Self adjusting entropy credits
- Safer failure modes
- Sample sources other than soundcard?
- Circuit for white noise generator, powered by keyboard socket
GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Softw
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