On 2/15/13, Paul Warren <pwarren(a)pwarren.id.au> wrote: Take a look at snd-egd, http://code.google.com/p/snd-egd/ . It does something very similar but with the microphone. It uses the same bit-wise algo you do, but adapted to work with the higher bits as well. (More of a concern for audio with its limited bandwidth.) The one step you are missing is the feedback/mixing. Snd-egd xors fresh random bytes with the old random bytes sitting in the ring buffer. This step seems to be pretty important in most systems. Others go an extra mile and xor hashed random numbers with the old stream. Snd-egd is also a great example of how to do the plumbing. Also mentioned in your readme is frequency hopping, though that looks unimplemented. Best of luck convincing tinfoil hat folk to use an RNG that is literally controlled by radio waves. A 50 ohm terminator + shielding would probably be a good idea, so that you are tapping into the thermal noise of the ADC and amps. -Kyle http://kmkeen.com