Something I wonder about contactless credit cards / etc. What's to prevent someone from not bothering to clone the card, but just to do a relay 'attack'? (I.e.

Something I wonder about contactless credit cards / etc. What's to prevent someone from not bothering to clone the card, but just to do a relay 'attack'? (I.e. getting one person to stand next to the victim, another at the terminal, and relaying all traffic from the victim -> terminal and vice versa.)