A security researcher used a homemade $60 system to outsmart self-driving car lidar sensors that cost thousands. Jonathan Petit said he was able to trick an autonomous vehicle into slowing down and even launched a denial of service attack on the tracking system so that it came to a complete stop. Petit’s attack worked at distances up to 100 meters, in front, to the side or even behind the lidar being attacked. He hopes his attack acts as a wake up call call for ripe for lidar systems”]