The application of Unmanned Aerial Vehicles in various areas created problems in the field of cybersecurity, privacy, safety. Gaps in the security system of UAVs allow them to be easily hijacked. The article analyses the security issues of UAVs, reviews their attacks scenarios, and proposes a fuzzy approach to the automatic selection of effective mechanisms to prevent identified attacks. The Drone Backbone Model has been developed to show the impact of attacks on UAVs at different levels. The Backbone Model allows a numerical assessment of the impact of the attack on the system.