Liaison statement
LS to IETF TLS WG – asking for RFC publication timeline of Post-quantum hybrid ECDHE-MLKEM Key Agreement active internet draft

1 About eSIM Working Group 2
eSIM Working Group 2 is responsible for the technical realisation of the eSIM /
Remote SIM Provisioning technical specifications (SGP.02, SGP.22 and SGP.32).

2 Summary
The eSIM Working Group 2 is currently incorporating Post-Quantum Cryptography
(PQC) support into various eSIM / Remote SIM Provisioning (RSP) technical
specifications. Several of our existing specifications for eSIM
server-to-server and device-to-server interfaces rely on TLS.

We are interested in adopting the Post-quantum hybrid ECDHE-MLKEM Key Agreement
for TLSv1.3 (https://datatracker.ietf.org/doc/draft-ietf-tls-ecdhe-mlkem/ ) as
a normative reference in our upcoming specification updates.

To facilitate our planning, the eSIM Working Group 2 kindly requests an
indicative timeline for the aforementioned Internet-Draft's progression to a
published RFC. Our indicative deadline for including new normative references
in our next specification update is Q4 2025.

The eSIM Working Group 2 looks forward to fruitful collaboration with the IETF
TLS Working Group on this matter.

3 Request to IETF TLS Working Group
The IETF TLS Working Group is kindly requested to take into account the above
information and request.

4 Next meetings
- eSIM WG2#119 - Jun 23, 2025 – London, United Kingdom
- eSIM WG2#122 – Sep 15, 2025 – London, United Kingdom

5 Contact
In the case of any questions and/or feedback, these can be directed to
GSMALiaisons@gsma.com.