A Highly Reliable Lightweight Distribution Network Communication Encryption Scheme

The distribution network belongs to the national key infrastructure, and the data of the automation distribution network is sensitive. It is necessary to encrypt the data in the network. At present, the communication network communication protection measures mainly aim at the security flaws of the communication protocol and the communication channel, and use the asymmetric key to encrypt the data in the network and authenticate the primary station and the terminal. Considering the current distribution network architecture, this paper designs a lightweight communication encryption scheme. The primary station side and the terminal side first perform two-way identity authentication, and then use SM4 symmetric encryption algorithm to protect power data, using SM2 asymmetric encryption. The algorithm encapsulates symmetric encryption keys and data signatures.