Collaborative signature and decryption method, apparatus and system of SM2 algorithm
An algorithm and hash algorithm technology, applied in the field of cryptography, can solve problems such as the inability to protect user privacy, and achieve the effect of less application requirements, low delay, and less interaction
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[0081] In order to solve the problem that traditional technologies cannot protect user privacy and resist malicious attacks, the present invention provides an embodiment 1 of an SM2 algorithm collaborative signature method implemented from the perspective of the first communication party; figure 1 It is a schematic flow chart of Embodiment 1 of the SM2 algorithm cooperative signature method implemented from the perspective of the first communication party in the present invention; as figure 1 As shown, the following steps may be included:
[0082] Step S110: Generate a message digest of the message to be signed according to a preset cryptographic hash algorithm;
[0083] Step S120: receiving the first elliptic curve group element fed back by the second communication party based on the first public key parameter and the selected random number; generating the first partial signature according to the message digest and the first elliptic curve group element;
[0084] Step S130: ...
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