Signature and signature verification method and device based on SM2 algorithm, equipment and medium

The invention discloses signature and signature verification methods and devices based on an SM2 algorithm, equipment and a medium, relates to the technical field of cryptography, is applied to a signature end, and comprises the following steps: determining to-be-signed data, and generating a first information abstract of the to-be-signed data by using an abstract algorithm; performing blind processing on a private key in a key pair based on a random number, and signing the first information abstract by using the blind private key to obtain a signature result; and sending the signature result and the to-be-signed data to a verification end, so that the verification end generates a second information abstract of the to-be-signed data by using the abstract algorithm, and performs signature verification on the signature result by using a public key in the key pair and based on a multi-scalar point multiplication method to obtain a signature verification result, and obtaining the verification result based on the