Keyboard clicks can lead to security hacks | CNET News.com: "A new security vulnerability has been discovered: the clickety clack of the keyboard.

An audio recording of an individual's typing can be transposed into a transcript of what was typed, according to University of California at Berkeley researchers. The technique works because each key makes a distinct sound when hit, and users, who typically type about 300 characters a minute, leave enough time between keystrokes for a computer to isolate the individual sounds."