[Ach] on algorithmic agility

ianG iang at iang.org
Thu Nov 28 05:00:21 CET 2013

On 28/11/13 01:08 AM, Philipp Gühring wrote:

>>> we might want to be able to change to AES128 then. (algorithmic
>> agility)
>> "algorithmic agility" -- a gread word btw. +1 from me. In that sense
>> there
>> should be CAMELLIA in there too. Does anyone know about ARIA?
> Yes, from the agility viewpoint, I totally agree. But with those ciphers,
> I have not heard enough in public about them before, so I am not sure,
> whether they were studied extensively enough so that we should recommend
> them. If you know more about them and trust them, I don't mind adding them.

I do not recommend algorithmic agility.  It rarely if ever has led to 
some sort of benefit out in userland, and it sets you up for disasters 
of compatibility later on.


If you stick to AES128 and AES256 then there is no reason to believe 
there will be a problem.  It's not a popularity contest.


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