Abstract: Unmanned aerial vehicle (UAV) swarm warfare has advantages of scale and cost when facing high-intensity confrontation and dynamic battlefield changes. It has been widely used in the military field by countries around the world. At the same time, the drone swarm system has also become the target of network attacks, including malicious node intrusion, drone hijacking, wireless interference, data theft and other security risks. Blockchain, as a technology equipped with the characteristics of asymmetric encryption, chained data storage, node collaboration and consensus, has been studied as an effective technical means to resist the threat of distributed network attack, and can be utilized to effectively enhance the security of UAV swarm system. This paper firstly analyzes the current development situation and security risks of UAV swarm system. Then the feasibility of enhancing the UAV swarm system security with Blockchain technology is proposed. Finally, we introduce some technical challenges of applying Blockchain technology.

Key words: Unmanned aerial vehicle swarm, Blockchain, security risk