Research on 5G smart grid feeder terminal communication security protection strategy based on one-time pad technology

Aiming at the problem that the peer-to-peer communication between feeder automation (FA) terminals in the 5G communication environment is prone to illegal interference and eavesdropping, this paper discusses the 5G smart grid feeder terminal communication security protection strategy based on one-time pad technology. Aiming at the problem that peer-to-peer communication between feeder terminals is vulnerable to illegal interference and eavesdropping in 5G communication environment, an innovative communication security protection method is proposed. This method ensures the identity security of both communication parties by integrating an encryption and decryption security chip in the feeder terminal and using the pre-shared key in the chip for two-way identity authentication. After successful identity authentication, the security service platform distributes a certain number of root keys to the feeder terminals, and dynamically generates new session keys through the improved Shamir key diffusion algorithm. Different session keys and initial vectors are used in each communication to ensure the unpredictability of encryption results.