SM2-based transaction signature method and device under block chain

Abstract

The invention discloses an SM2-based transaction signature method and device under a block chain. The method comprises the steps that: a generator determines a first three-dimensional coordinate according to a to-be-sent transaction; a first inverse element is determined through the z coordinate value of the first three-dimensional coordinate and a first parameter based on a first preset step, and the first three-dimensional coordinate is converted into a first two-dimensional coordinate according to the first inverse element; any first preset step comprises a first preset power; the first preset power in any first preset step is determined according to the first parameter; a first signature parameter is determined according to the first two-dimensional coordinate, a hash value of the to-be-sent transaction and a second parameter; a second inverse element is generated according to the private key of the generator and the second parameter; a second signature parameter is determined according to the second inverse element; and the generator sends the to-be-sent transaction, the first signature parameter and the second signature parameter. The calculation amount for determining the first inverse element and the second inverse element is reduced, so that the time consumption for generating a signature is reduced, and the signature generation efficiency is improved.

Description

technical field [0001] The present invention relates to the field of financial technology (Fintech), in particular to an SM2-based transaction signature method and device under a block chain. Background technique [0002] With the development of computer technology, more and more technologies (such as blockchain, cloud computing or big data) are applied in the financial field. The traditional financial industry is gradually transforming into financial technology, and big data technology is no exception. However, due to The security and real-time requirements of the financial and payment industries also put forward higher requirements for the efficiency of big data technology signature algorithms. [0003] At present, digital signature algorithms include SM2, RSA algorithm, etc. For the SM2 algorithm, in the process of signature generation, the conversion from a three-dimensional coordinate system to a two-dimensional coordinate system requires modular inverse operation, and ...

AI Technical Summary

Problems solved by technology

[0004] In the signature algorithm, the modular inverse operation needs to repeat the square operation many times, resulting in the large computing power consumed by the SM2 algorithm, complex calculation, time-consuming, and low efficiency of signature generation and verification.

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