Your RFID card is very easy to attack. Recently I heard of an attack where a guy was sneakily putting a RFID card reader against people's pockets on the subway. With this he was able to charge each card $20 without them even having to authorize the transaction. (above $20 usually requires some auth)
Phones authorize the transaction differently and are this still safe to use for tap & pay.
Phones authorize the transaction differently and are this still safe to use for tap & pay.