+++ Monday 22 December 2025 +++


GnuPG can now import and export Kyber secret keys
=================================================


In October 2024 I added new ky768_cv25519 subkey to my
GnuPG key [1] This allows for post-quantum encryption.

This key could not be exported with the usual command:

  `gpg -a --export-secret-key <key-ed>'

This resulted in the error:

   "exporting a secret dual key is not yet supported".

The only way to copy the key to another location is by
copying the entire ~/.gnupg directory.

Now, with the latest release 2.5.14 from 2025-11-19,
this is solved!

I downloaded and compiled 2.5.14 on a FreeBSD system,
and could successfully export and import the key.

Announce
--------
This is what -among others- the announce of the GnuPG
release 2.5.14 mentions [2] about this under the
"Noteworthy changes" heading:

- gpg: Allow import and export of Kyber secret keys.

So, thanks to the hard work of the GnuPG developers,
now we can not only create and use Kyber keys, but also
import and export those :)


[1]: gopher://box.matto.nl/0/new-gnupg-subkey.txt
[2]: https://lists.gnupg.org/pipermail/gnupg-announce/2025q4/000499.html


Last edited: $Date: 2025/09/08 17:41:46