Hi John,

 

authors didn't think (or realize) that this is a significant change to the
document.

As Yoav pointed out, the document should have *some* normative reference to
FrodoKEM and 

since ISO finalized it just before the IETF meeting, the authors decided
that this is currently

the most authoritative reference, thus listed it as normative. Generally
speaking,

it is always better to have a stable document as a normative reference and

formally draft-longa-cfrg-frodokem is not stable until it becomes the RFC
(that we wish to happen ASAP).

 

Anyway, we understand your concerns about paywalled documents and it is not
a big deal

to make ISO reference informative and draft-longa-cfrg-frodokem normative,

(as, for example, in draft-smyslov-lamps-frodokem-certificates-03) if the WG
thinks this is

more appropriate.

 

Regards,

Valery.

 

 

 

 

Paul Koning wrote:

>Surely there is a common IETF policy on how to deal with this,

 

Yes, once a document is adopted by a working group, the authors are editors
acting on behalf of the WG. Significant changes after adoption are expected
to be discussed on the WG mailing list and should have working group
consensus (or at least no significant unresolved objection) before being
incorporated.

 

Cheers,

John Preuß Mattsson

 

From: Koning, Paul <[email protected]>
Date: Wednesday, 22 July 2026 at 19:39
To: John Mattsson <[email protected]>; Yoav Nir
<[email protected]>
Cc: [email protected] <[email protected]>
Subject: RE: [IPsec] Re: I-D Action:
draft-ietf-ipsecme-hybrid-kem-ikev2-frodo-01.txt

        
You don't often get email from [email protected]. Learn
why this is important <https://aka.ms/LearnAboutSenderIdentification> 

        

Outside standards have been referenced for ages, certainly ISO and probably
others.  Surely there is a common IETF policy on how to deal with this, in
particular the unfortunate practice of many other standards bodies to charge
significant sums of money for their standards.

 

               paul

 

 

Internal Use - Confidential

From: John Mattsson <[email protected]>
Sent: Wednesday, July 22, 2026 1:10 PM
To: Yoav Nir <[email protected]>
Cc: [email protected]
Subject: [IPsec] Re: I-D Action:
draft-ietf-ipsecme-hybrid-kem-ikev2-frodo-01.txt

 

[EXTERNAL EMAIL]

Yoav Nir wrote:

>It makes sense that any “Using algorithm A in IKEv2” draft is going to have
algorithm A as a normative reference

 

Yes. The adopted version had draft-longa-cfrg-frodokem as a normative
reference.

 

As I said, I strongly oppose this change. Making a paywalled cryptographic
specification a normative reference is a very significant change. I do not
think the IETF should adopt or publish any documents with normative
references to paywalled cryptography. I therefore suggest that the authors
submit a -02 revision reverting it.

 

Cheers,

John Preuß Mattsson

 

From: Yoav Nir <[email protected] <mailto:[email protected]> >
Date: Wednesday, 22 July 2026 at 18:57
To: John Mattsson <[email protected]
<mailto:[email protected]> >
Cc: [email protected] <mailto:[email protected]>  <[email protected]
<mailto:[email protected]> >
Subject: Re: [IPsec] I-D Action:
draft-ietf-ipsecme-hybrid-kem-ikev2-frodo-01.txt

[with no hats]

 

It makes sense that any “Using algorithm A in IKEv2” draft is going to have
algorithm A as a normative reference, because you can’t implement the new
document without using the old document.

 

This is also what we did with RFC 8031 and 8420 - the last two times we had
a new algorithm in an IPsecME document.

 

Yoav

 

On 22 Jul 2026, at 18:58, John Mattsson
<[email protected]
<mailto:[email protected]> > wrote:

 

The -01 version makes the paywalled ISO reference normative. In the adopted
-00 version, it was only informative. Keeping the paywalled reference
informative was a requirement for my support of adoption.


I strongly oppose this change, which, to my knowledge, has not been
discussed on the IPsec mailing list.

 

Cheers,

John Preuß Mattsson

 

 

On 2026-07-04, 17:42, "[email protected]
<mailto:[email protected]> " <[email protected]
<mailto:[email protected]> > wrote:

Internet-Draft draft-ietf-ipsecme-hybrid-kem-ikev2-frodo-01.txt is now

available. It is a work item of the IP Security Maintenance and Extensions

(IPSECME) WG of the IETF.

 

   Title:   Post-quantum Key Exchange in IKEv2 with FrodoKEM

   Authors: Guilin Wang

            Leonie Bruckert

            Valery Smyslov

            Meiling Chen

   Name:    draft-ietf-ipsecme-hybrid-kem-ikev2-frodo-01.txt

   Pages:   16

   Dates:   2026-07-04

 

Abstract:

 

   FrodoKEM is an unstructured lattice based Key Encapsulation Mechanism

   (KEM), standardized by ISO.  Compared to ML-KEM, it is considered

   with more conservative security.  This draft specifies how to use

   FrodoKEM by itself or as an additional key exchange in IKEv2 along

   with a traditional key exchange.  These options enable to negotiate

   IKE and Child SA keys that are safe against a Cryptographically

   Relevant Quantum Computer (CRQC).

 

The IETF datatracker status page for this Internet-Draft is:

https://datatracker.ietf.org/doc/draft-ietf-ipsecme-hybrid-kem-ikev2-frodo/
[datatracker.ietf.org]
<https://urldefense.com/v3/__https:/datatracker.ietf.org/doc/draft-ietf-ipse
cme-hybrid-kem-ikev2-frodo/__;!!LpKI!jWyg0WpnTQWxc_G82C7WUnNb2O_j67FIJJj7SIS
xYkeEVT4rQewo3vxe57ezuzwBM3ehLes1YHkA-eS9UARdT32HK8_abvKu$> 

 

There is also an HTMLized version available at:

https://datatracker.ietf.org/doc/html/draft-ietf-ipsecme-hybrid-kem-ikev2-fr
odo-01 [datatracker.ietf.org]
<https://urldefense.com/v3/__https:/datatracker.ietf.org/doc/html/draft-ietf
-ipsecme-hybrid-kem-ikev2-frodo-01__;!!LpKI!jWyg0WpnTQWxc_G82C7WUnNb2O_j67FI
JJj7SISxYkeEVT4rQewo3vxe57ezuzwBM3ehLes1YHkA-eS9UARdT32HK2Le0ljy$> 

 

A diff from the previous version is available at:

https://author-tools.ietf.org/iddiff?url2=draft-ietf-ipsecme-hybrid-kem-ikev
2-frodo-01 [author-tools.ietf.org]
<https://urldefense.com/v3/__https:/author-tools.ietf.org/iddiff?url2=draft-
ietf-ipsecme-hybrid-kem-ikev2-frodo-01__;!!LpKI!jWyg0WpnTQWxc_G82C7WUnNb2O_j
67FIJJj7SISxYkeEVT4rQewo3vxe57ezuzwBM3ehLes1YHkA-eS9UARdT32HK6OerxEr$> 

 

Internet-Drafts are also available by rsync at:

rsync.ietf.org::internet-drafts

 

 

 

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