You can (mis)use ssh keys for git signing, but GPG on gpg-card and S/MIME on PIV...

		jabberwhookie 10 days ago \| parent \| context \| favorite \| on: Native Secure Enclave backed SSH keys on macOS You can (mis)use ssh keys for git signing, but GPG on gpg-card and S/MIME on PIV card are the two standards and their respective hardware implementations (for signing keys in general.)