What is pubring.kbx?

[Teemu Likonen]

I just noticed that a couple of days ago a new file ~/.gnupg/pubring.kbx
had appeared (or last modified). Who made it and what is it for? I'm
using GnuPG 2.0.26 and its manual doesn't seem to tell anything about
this file. Obviously I have ~/.gnupg/pubring.gpg too.

$ gpg2 --no-default-keyring --keyring ~/.gnupg/pubring.kbx --list-keys
gpg: [don't know]: invalid packet (ctb=00)
gpg: keydb_search_first failed: Invalid packet

-- 
/// Teemu Likonen   - .-..   <https://github.com/tlikonen> //
// PGP: 4E10 55DC 84E9 DFF6 13D7 8557 719D 69D3 2453 9450 ///
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 454 bytes
Desc: not available
URL: </pipermail/attachments/20161210/8e963ee2/attachment.sig>