SM2-based both side signature method and system

Abstract

The invention relates to the technical field of information security, and the embodiment discloses an SM2-based both side signature method and system. By adoption of the technical scheme provided by the invention, a part of private key can be separately stored in both communication sides, a signature or decryption and other operations can only be performed on a message by the cooperation of the both sides, neither of the both communication sides can obtain any information of the private key of the other side, therefore an attacker cannot forge the signature or decrypt the ciphertext if invading any of the both sides, and the both communication sides need to transmit two data to the opposite side in the signature interaction, so that the data communication traffic and the data calculation amount are low, and the signature efficiency is higher.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to an SM2-based two-party signature method and system. Background technique [0002] In general, complete key information needs to be invoked when running a cryptographic algorithm, so the key needs to be stored directly in memory. On less protected endpoints, this increases the risk of key loss. For example, the loss of the mobile phone, the eavesdropping of the algorithm operation process, etc. will lead to the loss of the key. How to safely protect the key of the weak terminal is a very important problem in the implementation of the cryptographic algorithm. [0003] The existing solution is to use the two-party signature method, but the common problem is that in the entire interactive signature operation, the amount of calculation is large and the amount of communication data is also large, which reduces the efficiency of signature generation. Contents of the inve...

AI Technical Summary

Problems solved by technology

On less protected endpoints, this increases the risk of key loss

For example, the loss of the mobile phone, the eavesdropping of the algorithm operation process, etc. will lead to the loss of the key. How to safely protect the key of the weak terminal is a very important problem in the implementation of the cryptographic algorithm.

[0003] The existing solution is to use the two-party signature method, but the common problem is that in the entire interactive signature operation, the amount of calculation is large and the amount of communication data is also large, which reduces the efficiency of signature generation

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