There are ways you could integrate this with a web site. You could use an authentication code sent on the backend to the phone for confirmation. It would basica

There are ways you could integrate this with a web site. You could use an authentication code sent on the backend to the phone for confirmation. It would basically be the same as any two-factor authentication. I'm just not sure which way it would have to go. Or instead of NFC, maybe the phone is linked to Safari through a bluetooth connection and works with a specific Javascript API. All of this, is of course implementation dependent. And at the moment, I won't think that we have enough information to rule it out.