GYROPHONE: EAVESDROPPING USING A GYROSCOPE presented at BlackHatEU 2014

by Gabi Nakibly, Yan Michalevsky,

Summary : We show that the gyroscopes found on most smart phones are sensitive to measure acoustic signals in the vicinity of the phone. Since iOS and Android require no special permissions to access the gyro, our research shows that apps and active websites that cannot access the microphone can nevertheless eavesdrop on speech in the vicinity of the phone. We have validated our findings on numerous phones and tablets with different gyro models. This is a joint work with Dan Boneh of Stanford University.