+1 to choosing reasonable and consistent names that make sense, instead of 
being overly concerned with whether they exactly replicate the implementation.



-Tim



From: David Benjamin <david...@chromium.org>
Sent: Thursday, October 17, 2024 11:33 AM
To: <tls@ietf.org> <tls@ietf.org>
Subject: [TLS] Re: X25519MLKEM768 in draft-kwiatkowski-tls-ecdhe-mlkem-02



While this whole situation is indeed ridiculous (there is obviously no 
security reason to use one or the other order and any certification systems 
that believe otherwise are clearly wrong and should be fixed), this draft with 
this order is now running code in several large deployments. I don't think 
it's worth the churn just to flip this back and forth now. Especially as key 
share prediction is not yet done and widely deployed.



I also agree that making the names inconsistent with each other will just 
confuse people, even if the internal orders are inconsistent.



On Thu, Oct 17, 2024, 08:19 Jan Schaumann 
<jschauma=40netmeister....@dmarc.ietf.org 
<mailto:40netmeister....@dmarc.ietf.org> > wrote:

Bas Westerbaan <bas=40cloudflare....@dmarc.ietf.org 
<mailto:40cloudflare....@dmarc.ietf.org> > wrote:
> The number of people that actually implement these hybrid KEMs is much
> smaller than the number of people that need to make a choice based on their
> name. How do we explain that one is called MLKEM768X25519 and the other
> SecP256r1MLKEM768?

"In hybrid key exchanges, the name reflects the
order."

This strikes me as overall much less confusing all
around than

"One is called <first><second>, the other is called
<second><first>, because we wanted to have both end in
the same string."

People choosing will do a substring match ("I want
PQC, so... ok, here's one that contains 'MLKEM', let
me enable that.").

-Jan

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