I'm just asking, because I have no idea how this works. I figured an assailant could more easily make use of an NFC signal than they could see the code on the f

I'm just asking, because I have no idea how this works. I figured an assailant could more easily make use of an NFC signal than they could see the code on the front of the device in the short time it takes you to memorize or copy/paste the code.