On Tue, Aug 19, 2025 at 8:35 AM John Mattsson <john.mattsson=
[email protected]> wrote:

> Is there WG consensus for registering code points? To my understanding,
> OpenSSL 3.5 LTS already uses the unregistered numbers in the draft.
>

Note that no WG consensus is needed to register code points, as the
standard is Specification Required.

-Ekr


>
>
> John
>
>
>
> *From: *Joseph Salowey <[email protected]>
> *Date: *Tuesday, 19 August 2025 at 16:41
> *To: *TLS List <[email protected]>
> *Subject: *[TLS] Re: Second WG Adoption Call for Use of SLH-DSA in TLS 1.3
>
> Thanks to everyone who participated in this call.  While we had more
> people respond to this call than the previous one, however, the ratio of
> the pros and cons was similar making the consensus rough.  The lack of a
> motivating use case was a common reason for being against adoption. The
> chairs feel that the following is the best approach to move forward:
>
>
>
> Adopt the draft and park it until there is sufficient external interest to
> publish it such as usage in another standard or a groundswell of
> significant implementations. Adoption turns control of the document to the
> working group which can then put appropriate disclaimers on its use and a
> RFC would not be published without a driving use case. While this is not
> the normal process for the working group there have been instances in the
> past to hold a document such as for TLS hybrid key exchange and ECH.
>
>
>
> We realize that this is not ideal for either side of the issue, but we
> feel this approach meets the needs of both parts of the community.
>
>
>
> Thanks,
>
>
>
> Joe, Sean, and Deirdre
>
>
>
>
>
> On Mon, Jul 14, 2025 at 2:06 PM  Sean Turner <[email protected]> wrote:
>
> We kicked off an adoption call for Use of SLH-DSA in TLS 1.3; see [0]. We
> called consensus [1], and that decision was appealed. We have reviewed the
> messages and agree that we need to redo the adoption call to get more input.
>
> What appears to be the most common concern, which we will take from Panos'
> email, is that "SLH-DSA sigs are too large and slow for general use in TLS
> 1.3 applications". One way to address this concern is to add an
> applicablity statement to address this point. We would like to propose that
> this (or something close to this) be added to the I-D:
>
> Applications that use SLH-DSA need to be aware that the signatures sizes
> are large; the signature sizes for the cipher suites specified herein range
> from 7,856 to 49,856 bytes. Likewise, the cipher suites are considered
> slow. While these costs might be amoritized over the cost of a long lived
> connection, the cipher suites specified herein are not considered for
> general use in TLS 1.3.
>
> With this addition in mind, we would like to start another WG adoption
> call for draft-reddy-tls-slhdsa. If you support adoption with the above
> text (or something similar) and are willing to review and contribute text,
> please send a message to the list. If you do not support adoption of this
> draft with the above text (or something similar), please send a message to
> the list and indicate why. This call will close at 2359 UTC on 28 July 2025.
>
> Cheers,
> Deirdre, Joe, and Sean
>
> [0] https://mailarchive.ietf.org/arch/msg/tls/o4KnXjI-OpuHPcB33e8e78rACb0/
> [1] https://mailarchive.ietf.org/arch/msg/tls/hhLtBBctK5em6l82m7rgM6_hefo/
> [2] https://datatracker.ietf.org/doc/draft-reddy-tls-slhdsa/
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