Substation Ethernet link access control based on TLSec protocol and SM2 certificate

The automation and control system of substation has extremely high requirements for the security of communication, and any high-threat access may lead to the substation request response is not timely, affecting the stable operation of the power system. Therefore, a method of substation Ethernet link access control based on TLSec protocol and SM2 certificate is proposed. SM2 cryptographic algorithm is used to design the encryption and decryption process of substation Ethernet link. On top of that, SM2 certificates are used for authentication using the TLS protocol. Finally, the algorithm of substation Ethernet link access control is designed by using the private key and public key of the generated network data. The experimental results show that the safety factor of substation Ethernet is higher, the information loss rate is lower, and the recall rate and accuracy rate can reach more than 95%.