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    SubjectRe: Want a random entropy source?
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    > I was astonished to see that the resulting signal is a white-noise
    > pattern with a slight emphasis at the high end (when sampled at 44
    > kilosamples per second). In short, it looks like diode noise with a
    > 4 kilohertz square wave thrown in.

    > "That suggests to me that this would make a fair source of random samples,
    > especially after you slot out the interfering signal.

    How can you guarantee that you are sampling noise, though, what if a
    sound card was picking up 50 Hz mains hum, for example, that would
    de-randomise the data quite a bit.

    > "How many computers don't have cheap sound cards and CD-ROM drives?"

    I have never understood how a 16-bit DAC or ADC can have noise above
    96 dB. Surely _by definition_ a 16-bit DAC or ADC is one that does
    not have noise above that level.

    John.
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