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Efficient SM9 two-party collaborative digital signature generation method and efficient SM9 two-party collaborative digital signature generation system

A digital signature and signature generation technology, applied in the field of information security, can solve problems such as system security threats

Active Publication Date: 2019-07-12
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the signature private key is leaked, the attacker can use the signature private key to forge the signature, which poses a huge threat to the security of the system

Method used

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  • Efficient SM9 two-party collaborative digital signature generation method and efficient SM9 two-party collaborative digital signature generation system
  • Efficient SM9 two-party collaborative digital signature generation method and efficient SM9 two-party collaborative digital signature generation system

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Embodiment Construction

[0047] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0048] Such as figure 1 As shown, the present invention proposes an efficient two-party distributed SM9 digital signature generation method, and a specific description is given below.

[0049] Symbols and definitions

[0050] A, B: Both parties of communication;

[0051] q: large prime number, and q>2 191 ;

[0052] G 1 ,G 2 : The additive cyclic group whose order is a prime number q;

[0053] G T : The multiplicative cyclic group whose order is a prime number q;

[0054] P 1 ,P 2 : Group G 1 ,G 2 generator of

[0055] [k]P: additive group G 1 ,G 2 k times the element P in

[0056] e: from G 1 ×G 2 to G ...

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Abstract

The invention discloses an efficient SM9 two-party collaborative digital signature generation method and an efficient SM9 two-party collaborative digital signature generation system. The method comprises the following steps: 1) 2) 3). According to the method, an efficient two-party distributed SM9 digital signature scheme is provided, two participants must perform message interaction online at thesame time in the signature process, and signature fairness is achieved. Meanwhile, the complete private key is split and stored by both parties participating in the signature, and a private key recovery process does not exist in the whole signature process, so that the security of the signature private key is ensured.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to an efficient SM9 method and system for two parties to collaboratively generate digital signatures. Background technique [0002] Digital signature is the application of asymmetric encryption technology and message digest technology, which is mainly used to verify the identity of the signer and the legitimacy of the message. Digital signatures can prevent active attacks and ensure the integrity, authenticity and non-repudiation of transmitted data. It is currently the most widely used, most mature and most operable cryptographic technology in network communications, e-commerce, and e-government affairs. . The security of a digital signature is inseparable from the security of the signature private key. Once the signature private key is leaked, the attacker can use the signature private key to forge the signature, which poses a huge threat to the security of the syst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/32
CPCH04L9/3247
Inventor 何德彪张佳妮冯琦王婧陈泌文
Owner WUHAN UNIV
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