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September 19, 2005

Can Spies Decipher Keyboard Clicks?

Researchers at the University of California, Berkeley, have found a way to turn the clicks and clacks of typing on a computer keyboard into a startlingly accurate transcript of what exactly is being typed.

In a paper released last week, the researchers explained how they developed software that could analyze the sound of someone typing on a keyboard for just ten minutes and then piece together as much as 96 percent of what had been typed.

The technique works because of the simple fact that the sound of someone striking an "a" key is different from the sound of striking the "t," according to Doug Tygar, a professor of computer science at Berkeley. "Think of a conga drum. If you hit a conga drum on different parts of the skin, it makes a different tone," he said. "That's an analogy for what's happening here, because there's a plate underneath the keyboard [that is] being struck in different locations."

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Posted by thinkingmachine at September 19, 2005 06:17 PM

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