https://build.opensuse.org/projects/openSUSE:Leap:Micro:6.0/signing_keys basically says that the 2k rsa key is inherited from Leap. In fact we use mostly ALP signed packages, packages in the repo seem to be signed by User ID openSUSE Project Signing Key <opensuse@opensuse.org> Key ID b88b2fd43dbdc284 Fingerprint 22c0 7ba5 3417 8cd0 2efe 22aa b88b 2fd4 3dbd c284 Expires on 2029-10-28 Key Size 2048 bytes Algorithm type RSA