vanheusden.com

audio entropy daemon

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FAQ

• no entropy data is added First, start audio-entropyd with the '-vv' flags.
  Check the following:
  • check in the logging that "n_output_bytes: 0" is logged. if so, verify that the recording-channel is not muted
  • verify that no errors like "Poker test failed!" are logged. that means that the data fetched is not random enough. if that doesn't matter to you, start audio-entropyd with '-s'

Links

• TimerEntropyd is like audio-entropyd but requires no soundcard or webcam. It uses the timers which are in every system.
  
• VideoEntropyd is like audio-entropyd for a 'video-4-linux'-compatible device. E.g. a tv-card or a webcam.
  
• inventgeek.com - use a radiation-source from a smoke-dector and a webcam for generating random numbers.
  
• fourmilab - another article about generating true random numbers using an radioactive source.
  
• This website: http://www.cs.berkeley.edu/~daw/rnd/ lists a whole lot of links to information on entropy-gathering on computers.
  
• lavarnd.org - generating random values using a lavalamp and a webcam.
  

  Hardware solutions

• Soekris engineering sells a board for aprox. $80 with a hardware RNG on it.
  
• ComScire has an USB solution producing upto 1Mb of random data per second.
  
• Orion has an RS232 solution producing 7.6Kb per second.
  
• hg400 USB2.0 connected hardware RNG. data-rates from 16Mb upto 32Mb.
  
• protego.se an RS232 and USB solution.
  
• qrbg - a USB connected quantum RNG. 12Mb/s
  
• idquantique - another quantum solution. 4 upto 16Mb