How would/could this kind of stuff work with e.g. EMV / contactless payments? Or, OpenPGP over NFC? I've seen tons of RFID implantable chips which aren't that

How would/could this kind of stuff work with e.g. EMV / contactless payments? Or, OpenPGP over NFC? I've seen tons of RFID implantable chips which aren't that interesting, I've also seen NFC ones but they just look to be read/write storage...