This article discusses a way to create a space protected from drones (quadcopters), with the possibility of using registered vehicles. Due to the large number of devices among civilians, there has been a recent tightening of legislation regarding the use of such drones. In particular, from September 27, 2020 in the Russian Federation, in order to lift a drone into the air in accordance with clause 52 of«Rules No. 138 use of airspace by an unmanned aerial vehicle», it is necessary to obtain permission to use the airspace. In this case, the owner will have to develop a flight plan in advance and approve it. A large number of drones were sold to the public before the entry into force of legislation, whichmeans the possibility of uncontrolled use of such devices for purposes contrary to the law. Virtually nothing protects against accidental interference or targeted competitive intelligence and industrial espionage. A cheap and effective way is to create a kind of «dome» around an important object using a white noise generator together with a filter that selects the necessary frequency for a whole range of heuristic criteria for solving real problems. The peculiarity of the operation of such a device will be that unregistered devices will not be able to fly over the protected object, while authorized drones will be able to catch them in various ways (nets, etc.) and observe the entrusted territory without restrictions.