[Cryptography] quantum computers & crypto

Bill Frantz frantz at pwpconsult.com
Wed Nov 10 17:37:07 EST 2021

On 11/10/21 at 1:59 AM, cryptography at dukhovni.org (Viktor 
Dukhovni) wrote:

>Although of course in either case the number of permutations
>of the deck in the orbit of the shuffle is rather small,
>both 8 and 52 are a lot less than 52 factorial.

Also, if you are trying to properly mix the cards for a game, a 
"perfect shuffle" isn't what you want. An interesting historical 
note is that when high-level duplicate games went from hand 
shuffling to machine shuffling, the hands showed a broader range 
of distributions. It goes to show that 3 or 4 "imperfect" 
shuffles don't result in good mixing.

Cheers - Bill

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