Your Heartbeat Could Be Your Password

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A technology in the works might soon allow you to unlock your hard drive by simply touching your keyboard. Your unique heartbeat, emitted through your fingertip, would be your password. Chun-Liang Lin and his team at the National Chung Hsing University in Taichung, Taiwan translated a human heartbeat into an encryption key using an electrocardiograph reading from an individual's palm. Their unique series of thump-thumpa generated a secret key. The part that blows my mind is that your heartbeat is so unique that that pattern never actually repeats. You will never get the same exact timing of beats twice. So the encryption scheme is based on the math behind chaos theory, which dictates that outcomes are highly sensitive to initial conditions, leading to widely divergent outcomes (it's sometimes referred to as the butterfly effect).

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Err… not exactly amazed by this but it is definitely better than pressure sensors in a car seat to identify the owner using his butt's 3D representation and weight distribution.