[openpgp] German BSI, PQC for OpenPGP in Thunderbird,

Hello,

I'd like to make you aware of a project call by the German BSI (a 
federal agency for IT security), which was brought to my attention.
I've posted some information on it on the Thunderbird planning mailing 
list, see the following thread, which has multiple messages from me:
https://thunderbird.topicbox.com/groups/planning/T5abbf135db2f3c1c/the-german-bsi-intends-to-sponsor-pqc-improvements-for-openpgp-in-thunderbird

In my understanding they intend to pay a contractor for a wide set of 
tasks to bring PQC to Thunderbird, including the work to standardize the 
use of PQC with OpenPGP, including implementations for RNP, Botan, GnuPG 
and libgcrypt.
It seems the BSI has already made a suggestion that they want to require 
the use of CRYSTALS-Kyber and -Dilithium.
Is that a reasonable choice?

Does it make sense to define a limitation to these methods at this point 
of time?
Thanks
Kai

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