Re: Algorithms to generate permutations

From: Unruh (unruh-spam_at_physics.ubc.ca)
Date: 08/02/05 

Date: 2 Aug 2005 15:06:52 GMT

Crypto@S.M.S writes:

>Unruh wrote:
> >
>> The problem with taking DES+AES+3DES+bLOWFISH is that it is very slow.
>> It is almost certainly stronger than any one of them for the same reason
>> AES is stronger than mini-AES which is AES but with only half of the rounds.
>>

>There you have it: ALMOST CERTAINLY STRONGER THAN ANY ONE OF THEM.

>Very slow is not a weakness, just a drawback, a trade-off that some of
>us are willing to make in order to have strength against future, unknown
>attacks.

But direct attacks on the cypher are almost certainly not the main threat.
It is wasting time putting huge locks on glass doors. Or steel doors on
straw houses. Spend time trying to figure out how your users are going
to misuse your system, what mistakes they will make and defend against them.

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