Lightweight Secure Communication Mechanism Towards UAV Networks

Due to the open nature of the UAV network, its external environment is complex, potentially risky, and vulnerable to a variety of attacks. The attacker will destroy the connection between the drones, intercept the information transmitted on the communication link, and interfere with the mission messages between the drones, thus requiring us to encrypt the data between the UAV nodes. The current mainstream UAV network communication uses a symmetric encryption algorithm, which is faster but less robust against network packet loss problems. The innovation of this paper is to propose an encryption communication scheme based on SM4 algorithm, and improve the stream encryption mode (CTR) of SM4 algorithm. Compared with the traditional SM4 CTR algorithm, the encryption and decryption speed is improved by 7.7%, and ChaCha20 flow Encryption algorithms are more tolerant of packet loss.