Hi everyone,

I am opposed as well. Ekr, David and Filippo already make good points,
which I agree with.

I view the FATT as a group of experts, who have a certain, rare skill set,
and the FATT can provide helpful input to the TLS WG. I don't see it as a
process that can be "bypassed." We're not in court here. I do not see how
making the process of asking the FATT for help more
expensive/rigid/formalized/... will help the WG. At most, it will reduce
the input that the WG can receive from FATT.

Best,
Felix


Am Di., 28. Apr. 2026 um 09:42 Uhr schrieb Nadim Kobeissi
<[email protected]>:

> I’m happy to volunteer as a FATT member. I’ve done prior work on the
> formal analysis of TLS 1.3, am confident in my ability to produce further
> work as required, and am willing to allocate the time.
>
> Nadim Kobeissi
> Symbolic Software • https://symbolic.software
>
> On 28 Apr 2026, at 2:03 AM, Muhammad Usama Sardar <
> [email protected]> wrote:
>
> It will probably not change anything but just to share my last 2 cents on
> this without going into a debate:
> On 27.04.26 20:49, Filippo Valsorda wrote:
>
> I’m opposed: it doesn’t sound like we heard from any FATT members about
> this? The scarce resource here is their time, we should do whatever works
> best for them
>
> That's a very fair point and I see this as a perfectly valid reason for
> opposition by *FATT*, but perhaps not by *WG members*. In my
> understanding, it would likely save FATT time, as I mention in the draft
> [0]. But if they oppose it, I'll just drop it, just like I dropped the
> openness point a couple of years ago.
>
> I believe chairs will seek their input directly, as they might not be fine
> with sharing their individual opinions.
>
> (and secondarily try not to block things unnecessarily on them, which
> means I am especially opposed to anything in
> https://muhammad-usama-sardar.github.io/tls-fatt-extension/draft-usama-tls-fatt-extension.html
>  that
> would have made a trivial addition of a key exchange algorithm like ML-KEM
> block on FATT).
>
> FWIW, this appears to be largely orthogonal to the mechanism for
> *contacting* FATT, which was the topic of this sub-thread.
>
> FWIW, this "trivial" addition has an opposition of several WG members in
> my understanding. It is essentially blocked. It is not obvious to me how we
> are going to unblock that without formal analysis. I don't think calling it
> "trivial" will lead us anywhere.
>
> I am very surprised that a sincere effort to resolve the dispute and to
> offer a statement for security considerations is labelled as 'block'-ing
> draft by the WG members, especially given that the draft is already blocked
> by the opposition of several WG members.
>
> Instead of spending more time and energies on resolving issues of ML-KEM,
> I would rather let it remain blocked and do some useful work for other WGs.
>
> Thank you all for your time and energies on considering my proposals. I am
> grateful to all for the discussion.
>
> Sincerely,
>
> -Usama
>
> [0]
> https://www.ietf.org/archive/id/draft-usama-tls-fatt-extension-06.html#section-4.1.3-2.2.1
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