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Digital signature method and device based on SM2

A digital signature and pre-signature technology, used in digital transmission systems, secure communication devices, public keys for secure communication, etc.

Active Publication Date: 2017-09-01
SHENZHEN OLYM INFORMATION SECURITY TECHOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Effective protection of private keys in insecure environments such as mobile devices faces major challenges

Method used

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  • Digital signature method and device based on SM2
  • Digital signature method and device based on SM2
  • Digital signature method and device based on SM2

Examples

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Embodiment Construction

[0083] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0084] refer to figure 1 and figure 2 , the first embodiment of the present invention provides an SM2-based digital signature method, comprising steps:

[0085] S1. The signature client generates the first signature sub-key u and the first signature sub-public key U corresponding to the first signature sub-key u, and sends the first signature sub-public key U to the signature server ; Generate a second signature subkey v corresponding to the signature client through the signature server, and a second signature subpublic key V corresponding to the second signature subkey v, wherein the signature server has Encrypted public-private key pair (A, a); The complete signature public key corresponding to the first signature subkey u and the second signature subkey v is Y;

[0086] S2. Use the first signature subkey u to g...

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PUM

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Abstract

The invention discloses a digital signature method and device based on SM2. A signature private key is divided into two parts, which are respectively stored in a signature client and a signature server, the signature client and the signature server can only sign messages by joining up, and if a private key of any one party is lost, the overall security of the private key is not affected. According to the method and the system provided by the invention, the key of one party is protected by weak security mechanisms such as PIN codes and so on, so that a higher safety level is still remained.

Description

technical field [0001] The invention relates to the field of digital signatures, in particular to an SM2-based digital signature method and device. Background technique [0002] An important application of asymmetric cryptography is digital signature. The digital signature mechanism allows the signer to use the signature private key to digitally sign the message. The verifier uses the public key of the signer to verify the validity of the digital signature, thereby confirming the authenticity of the message. The loss of the signature private key will result in the impersonation of the user's identity. Therefore, the identification private key needs to be strictly protected. Effective protection of private keys in insecure environments such as mobile devices faces major challenges. Contents of the invention [0003] The main purpose of the present invention is to provide an SM2-based digital signature method and device with high security. [0004] In order to achieve t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04L9/30H04L9/32
CPCH04L9/0825H04L9/3066H04L9/3247H04L9/3252
Inventor 程朝辉
Owner SHENZHEN OLYM INFORMATION SECURITY TECHOLOGY CO LTD
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