content: These signals are probably the light pulses used by the LIDAR unit to measure the distances to objects. Encrypting them will not solve the problem as it is not yet "data" and the encryption would actually interfere with the operation. Not every signal used by digital devices is actually digital. Analog signals can always be analyzed and deconstructed by someone with the motivation to do so. Physical interactions with the outside environment are generally all analog because nature does not do digital.