[Cryptography] quantum computers & crypto

John Levine johnl at iecc.com
Tue Nov 9 21:10:27 EST 2021

It appears that Christian Huitema <huitema at huitema.net> said:
>> But if you do 52 perfect shuffles in a row you bring the deck back into
>> its original order.  No matter what (n) you use, it will never be 'more
>> secure' than some (n) less than 52.  The so-called 'perfect shuffle' is
>> actually fairly lousy considered as a randomization algorithm, but you
>> see the point.
>Really? Did you mean to write 52! perfect shuffles in a row?

No, he meant to write 8.  

Spiffy animation of 8 perfect shuffles here:



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