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Real randomness generators
1 - The noisiest thing on most lists is the noise about other
2 - Why not use the postings of people complaining about other
peoples' posts as a source for noise. Surely few things in the
Universe are more random.
On the the subject at hand:
There are two major technical issues I have encountered in using
EM waves (which is what video and radio noise are) for generating
1 - They tend to be biased toward 1 or 0. This can often be
compensated for by (for example) xoring one bit stream from the
same source with the inverse of another. By doing this enough
times, you can eliminate many of the characteristics of interest.
2 - Noise tends to be characteristic for different media and noise
causes. This is a more difficult issue. For example, certain
types of media tend toward short noise bursts. In these cases,
you have to be quite careful to assure that the bit streams meet
the randomness criteria of the application.
As a side issue, you may find that once you start sending enough
information with truly random characteristics, you will be visited by
people that don't want you sending it. I know people who have
experienced these visitations and felt highly constrained as a result.
-> See: Info-Sec Heaven at URL http://all.net
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