A team of academics has detailed this week novel research that converted a smart vacuum cleaner into a microphone capable of recording nearby conversations. Named LidarPhone, the technique works by taking the vacuum’s built-in LiDAR laser-based navigational component and converting it into a laser microphone. […] They tested the LidarPhone attack with various objects, by varying the distance between the robot and the object, and the distance between the sound origin and the object. Tests focused on recovering numerical values, which the research team said they managed to recover with a 90% accuracy. But academics said the technique could also be used to identify speakers based on gender or even determine their political orientation from the music played during news shows, captured by the vacuum’s LiDAR.
But while the LidarPhone attack sounds like a gross invasion of privacy, users need not panic for the time being. This type of attack revolves around many prerequisites that most attacks won’t bother. There are far easier ways of spying on users than overwriting a vacuum’s firmware to control its laser navigation system, such as tricking the user on installing malware on their phone. The LidarPhone attack is merely novel academic research that can be used to bolster the security and design of future smart vacuum robots. In fact, the research team’s main recommended countermeasure for smart vacuum cleaning robot makers is to shut down the LiDAR component if it’s not rotating. Additional details about the research are available in a research paper titled “Spying with Your Robot Vacuum Cleaner: Eavesdropping via Lidar Sensors.”