SM2-based distributed photovoltaic network terminal equipment key access method and system

The invention discloses a distributed photovoltaic network terminal equipment secret key admission method and system based on SM2, a national cryptographic SM2 algorithm adopts a bilinear mapping technology in a curve cryptosystem, has the advantages of high strength, high efficiency, high security and the like, and uses the advantages of the SM2 algorithm to access the secret key of the distributed photovoltaic network terminal equipment. The SM2 algorithm is applied to the communication environment of the distributed photovoltaic network in combination with the SM3 cryptographic algorithm and the pre-calculation table technology, and a safe and reliable authentication mode of the terminal equipment can be realized. The access technology comprises the following steps: distributed photovoltaic network terminal equipment performs secret key exchange based on an SM2 asymmetric encryption algorithm, performs message authentication based on a simplified SM2 digital signature of a distributed photovoltaic network