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Keylogging just by listening !

Capt'n Midnight · 2005-09-21 20:55:37

Very interesting The concept dates from the Russians bugging the American embassy and trying to figure out what was being typed. ( in a different episoded they sent microwaves at the typewriter, the Americans spent a lot of time and money to show that they might have been able to work out the orientation of the golfball, a…

21-09-2005 8:55pm

#1

Capt'n Midnight

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Very interesting

The concept dates from the Russians bugging the American embassy and trying to figure out what was being typed. ( in a different episoded they sent microwaves at the typewriter, the Americans spent a lot of time and money to show that they might have been able to work out the orientation of the golfball, a lot less money and time could have been spent checking that the typewriter was indeed never used for confidential info )

http://www.theregister.co.uk/2005/09/16/key_clicks_betray_passwords/
http://www.cs.berkeley.edu/~tygar/keyboard.htm

Li Zhuang, Feng Zhou, and J. D. Tygar
(Please reference this web page as keyboard-emanations.org -- its location will shortly move to its own server.)

We show that using a generic microphone, we can successfully recover almost all text typed on standard keyboards. Unlike previous research our method works even if we have no information about the typist, the keyboard, and no "training data" (examples of the typist typing known text). Simply put a microphone in a room with a typist, record 10 minutes of data, and our algorithms recover the typed text ... including arbitrary text, such as passwords. Our work breaks even "quiet" keyboards that are designed not make sounds. Our results suggest that recovery is possible even if microphones are outside the room (using parabolic microphones).

Paper
http://www.cs.berkeley.edu/~tygar/papers/Keyboard_Acoustic_Emanations_Revisited/preprint.pdf

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