SM9 joint digital signature method and SM9 joint digital signature device
A digital signature and pre-signature technology used in digital transmission systems, secure communication devices, key distribution
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[0079] It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0080] refer to figure 1 and figure 2 , an embodiment of the present invention provides a SM9 joint digital signature method, including the steps:
[0081] S1. The signature client obtains the first fragmented sub-key M of the identification private key S_A corresponding to its identification, wherein the second fragmented sub-key N of the identification private key S_A is obtained by the signature server corresponding to the signature client Obtain; wherein, the key generation center randomly selects the master key to generate the system parameter group. .
[0082] In step S1, the above-mentioned system parameter group includes 1 , P 2 , [s]P 1 , g=e(P 1 , [s]P 2 ), H>, where E is an elliptic curve, and e represents a binary mapping e:G 1 ·G 2 →G t , G 1 and G 2 are two point groups on the elliptic...
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