building a true RNG

[Eugen Leitl]

On 24 Jul 2002, Paul Crowley wrote:

> I can't believe any compression software could be as fast as just
> feeding the signal straight into SHA-1.

I haven't tried this, but assuming I'm digitizing dark video and only get
noise in the lower significant bits I can just mask out the constant
(zero) ones and paste them together to destill the entropy with a very low 
computational cost before feeding it into a cryptohash.

As an aside to what constitutes physical entropy of a system it is indeed 
depending on context of the measurement. A good source of information on 
entropy in all contexts is 

	http://www.math.psu.edu/gunesch/entropy.html


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