> does your hardware key work on mobile? Yes, they support NFC > or do you now need to maintain two keys for every service? I maintain 4 keys so I have backu

> does your hardware key work on mobile? Yes, they support NFC > or do you now need to maintain two keys for every service? I maintain 4 keys so I have backups. In most cases registering additional keys is no problem, and this is only needed when signing up.