ssh -T git@github.com # Should prompt for PIN then authenticate Sign a file gpg --sign document.txt # Prompts for PIN on the dongle Decrypt a file gpg --decrypt secret.gpg List keys on card gpg --card-status Change PIN gpg --card-edit gpg/card> admin gpg/card> passwd Step 7: Backup & Recovery Critical : Backup your revocation certificate immediately:

sudo apt install gnupg gnupg-agent pcscd scdaemon (Homebrew):

enable-ssh-support Restart and add to shell profile ( ~/.bashrc or ~/.zshrc ):

gpg --card-status Expected output shows:

gpg --card-edit Within the interactive shell:

brew install gnupg ykman pinentry-mac :