back

by throwoutway·4y ago·view on hn ↗
>This works even if the person is covering the pad with their hands.

That is incredible! It's not just ATM PINs this could apply to. It's not a stretch of the imagination to expect a state intelligence agency monitoring an embassy or a dissenter's apartment keypad and applying techniques like this

1 comments
IIRC there was a paper on recovering text, including passwords, from the keypress sound variation recorded by a microphone on the table next to the keyboard (e.g. in a compromised phone).