I added an authentication key to my existing key <yubi...@f76.eu>. $ gpg --edit-key --expert yubi...@f76.eu > addkey
I selected: 8: RSA (set your own capabilities) S: disable sign capability E: disable encrypt capability A: enable authenticate capability 4096: key size 0: expiry (never) However, I cannot export it for SSH: $ gpg --list-keys --keyid-format SHORT yubi...@f76.eu pub rsa4096/1B6ED589 2023-06-29 [SC] 7A0FE73DDB744F0F97341DA71BE349D11B6ED589 uid [ultimate] Felix E. Klee (YubiKey) <yubi...@f76.eu> sub rsa4096/D2E31736 2023-06-29 [E] sub rsa4096/FBA5B1E5 2023-11-20 [A] $ gpg --export-ssh-key FBA5B1E5 gpg: key "FBA5B1E5" not found: Unusable public key gpg: export as ssh key failed: Unusable public key GnuPG version: $ gpg --version gpg (GnuPG) 2.2.27 libgcrypt 1.9.4 Copyright (C) 2021 Free Software Foundation, Inc. License GNU GPL-3.0-or-later <https://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Home: /home/felix/.gnupg Supported algorithms: Pubkey: RSA, ELG, DSA, ECDH, ECDSA, EDDSA Cipher: IDEA, 3DES, CAST5, BLOWFISH, AES, AES192, AES256, TWOFISH, CAMELLIA128, CAMELLIA192, CAMELLIA256 Hash: SHA1, RIPEMD160, SHA256, SHA384, SHA512, SHA224 Compression: Uncompressed, ZIP, ZLIB, BZIP2 What’s wrong here? _______________________________________________ Gnupg-users mailing list Gnupg-users@gnupg.org https://lists.gnupg.org/mailman/listinfo/gnupg-users