From the article:
Finnish researchers presented new technology designed to prevent thefts of mobile phones and laptops, using biometrics to recognize the gait of the device's owner. A sensor-based so-called "gaitcode" embedded in the device registers and memorizes the movements of the owner in three-dimensional form, and is reliable in 90 percent of cases, the researchers said Thursday.
If it does not recognize the walk, it asks for a password. If given an incorrect password, the device automatically locks itself down.
Link: Mobile phones talk the talk, will soon walk the walk