Expanded encryption and decryption signature algorithm supports multiple signature digest algorithms including SM2 elliptic curve public-private key algorithm and SM3 cryptographic hash algorithm to make the calculation based on public-private key-key system more convenient and safer;

SM2 elliptic curve public-private key algorithm

https://baike.baidu.com/item/SM2/15081831

SM3 cryptographic hash algorithm

Expanded encryption and decryption signature algorithm SM2 & SM3