Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

SM9 joint digital signing method and device

A technology for digital signature and signature verification, used in digital transmission systems, secure communication devices, key distribution

Inactive Publication Date: 2018-03-30
SHENZHEN OLYM INFORMATION SECURITY TECHOLOGY CO LTD
View PDF11 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Effective protection of private keys in insecure environments such as mobile devices is facing challenges

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • SM9 joint digital signing method and device
  • SM9 joint digital signing method and device
  • SM9 joint digital signing method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0056] refer to figure 1 , the embodiment of the present invention provides a kind of SM9 combined digital signature method, it is characterized in that, comprises the following steps:

[0057] S1. The signature client obtains the first fragment subkey M of the identification private key S_A corresponding to its identity ID_A, wherein the second fragment subkey N of the identification private key S_A is provided by the signature service corresponding to the signature client The key generation center randomly selects the master key to generate the system parameter group.

[0058] In step S1, the above-mentioned system parameter group includes 1 , P 2 , [s]P 1 , g=e(P 1 , [s]P 2 ), H>, where E is an elliptic curve, and e represents a binary mapping e:G 1 ·G 2 →G t , G 1 and G 2 are two point groups on the elli...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an SM9 joint digital signing method and device. According to the method and device, an identification private key S_A generated by a key generation center is divided into two parts, i.e., a first subkey M and a second subkey N, in a signing client, a signing server or a third party; the first subkey M and the second subkey N are respectively stored in two entities, i.e., the signing client and the signing server; the signing client carries out signing on a message m through the first subkey M and then transmits a signing result X to the signing server; the signing server converts the signing result X of the signing client through the subkey N to generate a signature Y of the identification private key S_A on the m, and sends the signing result Y to the signing client if verifying that the signing result Y is correct. Therefore, the overall security of the identification private key S_A is not affected by the loss of the subkey stored in either the signing clientor the signing server, and the digital signing security is further improved.

Description

technical field [0001] The invention relates to the field of digital signatures, in particular to an SM9 combined digital signature method and device. Background technique [0002] The SM9 identification cryptographic algorithm is an identification cryptographic algorithm based on bilinear pairings. It can use the user's identity to generate the user's public and private key pair, which is mainly used for digital signature, data encryption, key exchange and identity Certification etc. In the existing digital signature process, if the key is lost, the security of the signature will be affected. Therefore, the identification private key needs to be strictly protected. Effective protection of private keys in insecure environments such as mobile devices is facing challenges. Contents of the invention [0003] The invention mainly provides a simple and safe SM9 combined digital signature method and device. [0004] In order to realize the foregoing invention object, the pre...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/32H04L9/30H04L9/08
CPCH04L9/0866H04L9/0869H04L9/3066H04L9/3252
Inventor 程朝辉劳阳杜峰
Owner SHENZHEN OLYM INFORMATION SECURITY TECHOLOGY CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com