A Lightweight SM2 Two-Party Collaborative Method for Generating Digital Signatures

Abstract

The invention discloses a lightweight SM2 two-party collaborative digital signature generation method, wherein the participants are P1 and P2, and comprises the following steps: 1) initializing signature parameters; 2) generating a distributed secret key: generating a signature private key and a signature verification public key of the participants P1 and P2; and 3) generating a distributed signature, wherein the step is mainly used for generating the digital signature (r, s) of the message m by the participants P1 and P2 jointly. According to the method, a pre-calculation method is adopted, so that the calculation expenditure for generating the SM2 digital signature by the two parties in a combined manner is greatly reduced, efficient SM2 two-party collaborative digital signature is realized, and meanwhile, the security, privacy and fairness among the parties participating in signature are ensured.

Description

technical field [0001] The invention relates to information security technology, in particular to a lightweight SM2 method for two parties to collaboratively generate digital signatures. Background technique [0002] Digital signatures are simulations of traditional handwritten signatures in a digital environment. They have important applications in identity authentication, data integrity, non-repudiation, and anonymity, and are usually implemented using public-key cryptosystems. The user uses the signature private key to generate the signature of the message, and the verifier verifies the validity of the signature through the public key. The security of the signature is entirely dependent on the security of the signature private key. [0003] However, in the application background of the mobile Internet, the storage security of the signature private key cannot be guaranteed, so research on the digital signature of split private key and joint signature has been born. [00...

AI Technical Summary

Problems solved by technology

However, once the private key is restored, the party holding the complete private key can independently sign messages without the knowledge of other parties, which poses a huge threat to the security of the system

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