Abstract: Unmanned aircraft vehicle swarm not only broadens the application fields of unmanned aircraft vehicles (UAVs),but also brings more complex security issues.Both the intelligence collected by UAVs and UAV itself are vulnerable to hacker attacks.Once hackers intercept communication information or hijack UAVs,it will have an adverse effect on the combat environment,and even cause serious consequences such as leaking state secrets and disrupting social order.This article introduces the security issues faced by UAV swarm and the principle of the consortium blockchain－Hyperledger Fabric.Then it designs a peer-to-peer network model named “UAV-Swarm Net” based on Hyperledger Fabric,using distributed ledgers and smart contracts to implement the safe cooperative combat of UAV swarm.The UAV-Swarm Net model has the characteristics of distribution,multiple copies,encrypted channel transmission and responsibility traceability,which can effectively guarantee the confidentiality,integrity and availability of data,enhance the robustness and scalability of UAV system.It provides a new solution to the information security problems faced by UAV swarm in the future UAV systemized combat environment.

Key words: Blockchain, Cooperative combat, Hyperledger Fabric, Network security, UAV swarm