APT 2.7.13 just landed in unstable and with GnuPG 2.4.5 installed, or 2.4.4 with a backport from the 2.4 branch, requires repositories to be signed using one of - RSA keys of at least 2048 bit - Ed25519 - Ed448 Any other keys will cause warnings. These warnings will become errors in March as we harden it up for the Ubuntu 24.04 release, which was the main driver to do the change *now*. If you operate third-party repositories using different key algorithms, now is your time to migrate before you get hit with an error. For the Ubuntu perspective, feel free to check out the discourse post: https://discourse.ubuntu.com/t/new-requirements-for-apt-repository-signing-in-24-04/42854 -- debian developer - deb.li/jak | jak-linux.org - free software dev ubuntu core developer i speak de, en
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