The NFC n424 chips used by Boltcard are often used as pin protected ID badges, that just need to access a directory to confirm/deny verification. Seems like having that as a directory of approved Users accessible in a private Nostr relay can allow the same functionality, to create an physical Nostr-signing device.

Am I wrong, or will something like Bitwarden on a Start9 OS be necessary for keeping that data directory available..?