Re: Elliptic curve on Centos 6.x

[John R Pierce <pierce@xxxxxxxxxxxx>]

On 1/3/2014 4:25 PM, Timothy Murphy wrote:
> Shannon entropy only makes sense when applied to a random variable.
> It cannot be applied to a single string, as in this case.

the seed of a algorithm like /dev/urandom is not a single variable, its 
a big array of variables.   these have to be created with sufficiently 
random external events to achieve a reasonable level of entropy, and if 
you continue to generate pseudo-random-numbers from this when those 
random external events aren't ongoing at a high enough rate relative to 
your requirements for new random numbers, eventually the 'entropy' runs 
out, and the sequence becomes increasingly predictable.


-- 
john r pierce                                      37N 122W
somewhere on the middle of the left coast

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