It appears that Scott Kitterman  <skl...@kitterman.com> said:
>On October 27, 2023 2:56:30 PM UTC, "Murray S. Kucherawy" 
><superu...@gmail.com> wrote:
>>On Sun, Oct 1, 2023 at 1:50 AM Jan Dušátko <jan=40dusatko....@dmarc.ietf.org>
>>wrote:
>>
>>> I would like to ask to consider the possibility of defining a DKIM
>>> signature using Ed448. [...]

>My view is that more encryption algorithms are bad for interoperability.  For 
>DKIM signing/verifying to work, senders
>and verifiers need a common algorithm.  More choices make this more complex to 
>achieve.
>
>We standardized ed25119 as a hedge against unknown vulnerability in RSA. ...

Since we already have ed25519, why would we want ed448?  If ed25519 is a ten 
ton steel
door on our cardboard box, ed448 is a fifteen ton steel door.

R's,
John

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