Researchers at Georgia Tech have worked up a proof-of-concept demonstration of using an iPhone 4's accelerometer as a keylogger. After setting the iPhone near a computer keyboard, the device's built-in accelerometer and gyroscope were able to decipher entire sentences "with up to 80 percent accuracy."
Similar keyloggers have already been developed using microphones, which sample vibrations far more frequently than accelerometers. However, nearly all phone operating systems ask a user's permission before granting applications access to
