.hg How much can NFC cards do? Because it seems to be a lot, along the lines of contact-chip cards, a lot more than simple magstripe cards which are limited to just storing data, parroting it back, and maybe modifying it.
Could you manufacture NFC cards with unique keypairs (ed25519, rsa) and have them do common crypto?
@noiob .hg Right but that's a whole device.
…I guess the question could decompose to…is a credit-card-form-factor card with an NFC antenna /also/ “a whole device”?