RFID is the same as a barcode, just that you don't need an optical reader (or line of sight, even). Did you mean NFC with some signature scheme, or did you mean

RFID is the same as a barcode, just that you don't need an optical reader (or line of sight, even). Did you mean NFC with some signature scheme, or did you mean a unique code like a barcode or RFID to track an item individually?