Alibaba researchers show the use of sound to attack smart devices

The operating principle of general UAV jammer is to send interference signals, cut off the communication between the UAV and the controller, and disrupt the GPS navigation system, then force the UAV to automatically land.

However, at the Black Hat Security Conference in Las Vegas, researchers at the Alibaba Security Department demonstrated how to use sound to attack the UAV.

It is said this kind of sound weapon mainly attacks smart devices which depend on MEMS Sensor, such as gyroscopes and accelerometers, to input signals.

At the scene, Alibaba researchers shown the use of sound to attack iPhone 7, Samsung Galaxy S7, DJ UAV, VR display and Millet electric balance board.　　

Most commercial gyroscopes are tuning fork gyroscopes, and if the external vibration matches the resonant frequency of the gyroscope, the sensor will cause the sensor to send the wrong data to the device. By tuning the sound signal to the resonant frequency of the MEMS system, the researchers demonstrated that they could cause the sensor to send fatal data, resulting in failure of the device or software that relied on the sensor. Therefore, it can make the UAV fall, the robot failure, lose the sense of direction of VR and AR, and even interfere with the car's airbag sensor.

(Evangle Luo of TTFLY shared with you)