[Cryptography] immortal quote about randomness
John Denker
jsd at av8n.com
Mon May 23 00:27:14 EDT 2016
On 05/22/2016 06:18 PM, Kent Borg wrote:
> Dammit, I can neither remember nor find that quote about how using a
> deterministic process to make up random numbers is against nature, or
> grace, or the universe. Like I say, I can't find it.
``Anyone who considers arithmetical methods of producing
random digits is, of course, in a state of sin. For, as has been
pointed out several times, there is no such thing as a random
number -- there are only methods to produce random numbers, and a
strict arithmetic procedure of course is not such a method.''
John von Neumann,
``Various Techniques Used in Connection With Random Digits''
page 36 in _Monte Carlo Method_
proceedings of a symposium held June 29 -- July, 1, 1949
A.S. Householder, G.E. Forsythe, and H.H. Germond (eds.)
Institute for Numerical Analysis (published 1951)
Actually it's a twofer. I use the second sentence more
often than the first. Here's my version:
There's no such thing as a random number.
If it's random, it's not a number.
If it's a number, it's not random.
You can have a random distribution over numbers,
but then the randomness is in the distribution,
not in any particular number that may have been
drawn from such a distribution.
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