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. [...]


Which DKIM implementations are known to be willing to support this if it
were added?

ED25519 support was added by a working group called DCRUP.  Although that
WG has since closed, the list is still open and you could try posting there
to see if there's interest.

I don't think there are any working groups currently operating whose
charters include taking up work like this.  The registry rules require an
RFC with IETF Consensus, which would mean either a working group or
sponsorship of an Area Director.  You would just need to produce a short
document like RFC 8463 to get this done.

-MSK
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