Acoustic snooping on typed information

Wednesday, 14 September 2005, 3:02 AM EST

There's an interesting new paper showing that 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. The idea is that different keys tend to make slightly different sounds, and although you donít know in advance which keys make which sounds, you can use machine learning to figure that out, assuming that the person is mostly typing English text. (Presumably it would work for other languages too.)

By Edward W. Felten at the Freedom to Tinker blog.

[ Read more ]




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