Signature method and device for generating SM2 algorithm through mutual coordination, and storage medium

Abstract

The invention discloses a signature method and device for generating an SM2 algorithm through mutual coordination, and a storage medium, and solves the problem that a user private key is easily stolenin the prior art under the condition of no cryptographic hardware. The signature method implemented by a first participant includes the steps: receiving intermediate information determined by a second participant according to a signature output party identifier; determining a participant of the complete signature of the to-be-signed message based on the signature output party identifier; generating a second partial signature of the to-be-signed message by using a first sub-private key and the intermediate information if the first participant outputs the complete signature, and outputting thecomplete signature consisting of the first partial signature and the second partial signature carried in the intermediate information; generating a first intermediate signature through the first sub-private key and the intermediate information of the second participant outputs the complete signature, and sends the first intermediate signature to the second participant, so that the second participant can generate a second partial signature of the to-be-signed message by using a second sub-private key and the first intermediate signature, so as to determine the complete signature.

Description

Technical field [0001] The present invention relates to the field of information security and cryptography, in particular to a signature method, device and storage medium for both parties to collaboratively generate an SM2 algorithm. Background technique [0002] In the traditional Internet, in order to protect the security of users’ online business, cryptographic technologies such as digital signatures and encryption and decryption based on PKI (Public Key Infrastructure) are often used to verify the authenticity of users’ identities and ensure the confidentiality of information. Integrity and non-repudiation of the signer, etc. In PKI-based applications, the protection of private keys is of paramount importance. Traditional mode usually equips users with USBKey, SmartCard and other security hardware peripherals to ensure the security of private keys. [0003] With the rapid development and application of mobile Internet and cloud computing, mobile smart terminals and "thin clie...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a signature method, device and storage medium for both parties to collaboratively generate the SM2 a

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