09.14.2005 - Researchers recover typed text using audio recording of keystrokes: "BERKELEY � A new security threat revealed by computer scientists at the University of California, Berkeley, may be enough to drive some people away from their computer keyboards and back to pen and paper. The researchers show that a simple audio recording of those keyboard clicks can betray the text you just entered, from passwords to secret love notes.
'Acoustical spying' using an audio recording of the sounds generated by typing on a computer keyboard is a potential security threat identified by UC Berkeley researchers."

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