How to control and prevent drone surveillance in military management areas?

First, post the relevant confidentiality system outside the gate and outside the wall. Hanging slogans "You will be caught if you steal secrets".

Secondly, every step of the way is as high as the magic, and the troops must also be equipped with anti-candid photography equipment, such as drones with better performance and greater power. Once a drone is discovered to be filming secretly, they will be dispatched immediately. Own your drone and find the operator. Or shoot it down directly. Investigate the controllers and punish them severely.