Automated Vehicles (AV's) rely on sensor data to perform their mission. Radar has been identified as the primary sensor to perform short-range/long-range (24//77 GHz) obstacle detection. Radar security has been extensively studied in the military context but security solutions aren't necessarily transferable to the civilian space due to size, weight, power and cost (SWaP-C)concerns. We will discuss the potential threat on autonomous vehicle(AV) radar and discuss countermeasures and their applicability. The experimental results of on-going security testing of automotive radar conducted by the author will be presented. The security aspects of other AV sensors will also be discussed as well as the sensor fusion challenges of radar, LIDAR, and optical sensors.