On Mar 21, 2022, at 11:34 AM, Wessels, Duane 
<dwessels=40verisign....@dmarc.ietf.org> wrote:
> Is it in response to the DNS-OARC talk we saw about implementing PQC Falcon 
> in PowerDNS, and they used the next unused algorithm number rather than a 
> private algorithm?

Nils could have picked 253 but probably didn't even think of looking down to 
the bottom of the list. He was just following the time-honored pattern in the 
IETF. :-)

> If the authors of that work are on this list I would be interested to hear 
> from them about that decision. In particular, would just having more private 
> algorithms change their thinking or is something else needed?

They only needed one. This draft is for experimenters who need many at the same 
time. NIST has said that they are likely to later standardize on multiple 
post-quantum signature algorithms which will create larger payloads, and the 
DNSSEC community will have to decide if it wants just one of those, or many. 
Having a bit of experimental space for authoritative and recursive developers 
would be good, given that basically the entire range will be empty for 
centuries.

--Paul Hoffman

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