[3stripe]

Reminds me of an episode of Due South (the tv series about a Canadian mountie working as a detective in Chicago) in which he correctly works out a password from just the sound of someone typing it.

Turns out this is not so far-fetched after all:

"If you have an audio recording of somebody typing on an ordinary computer keyboard for fifteen minutes or so, you can figure out everything they typed."

https://freedom-to-tinker.com/blog/felten/acoustic-snooping-...

[dominicgs]

There was a great talk at Defcon in 2009 about sniffing keystrokes with voltmeters and lasers. It's worth watching the video[1] if you're interested in this audio technique.

The first part of their presentation uses a novel method to pick up PS/2 keystrokes from a system's ground connection. This presentation was what lead me to design the PS/2 tap[2] to sniff keystrokes with my sound card.

[1] https://www.youtube.com/watch?v=9zq9DQAbWmU [2] https://github.com/dominicgs/PS2_tap