LidarPhone attack targets the lidar sensors in smart vacuum cleaners transforming them into microphones to record sounds and eavesdrop.

Describing LidarPhone in brief, the researchers stated, The fundamental concept of LidarPhone lies in sensing such induced vibrations in household objects using the vacuum robot’s lidar sensor and then processing the recorded vibration signal to recover traces of sounds. This sensing method is inspired by the principles of laser microphones that use reflected laser beams to sense sounds from vibrating objects. Although laser mics require sophisticated setups, the rotating lidar sensors are equipped with at least a laser transmitter and reflection sensor. This enables the key possibility to transform a lidar into a microphone.

Source: LidarPhone Attack Transforms Smart Vacuum Cleaners Into Spying Tools