Digital signature method and device

A technology of digital signature and signature data, applied in the field of network information security, can solve the problem of inability to realize digital signature and affect the convenience of users' digital signature.

Pending Publication Date: 2022-02-18
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the above-mentioned technical solution has the following problems: the user must use a local device that stores the private key to realize the digital signature of the information; on the contrary, the user has no way to realize the digital signature without carrying the local device that stores the private key. This greatly affects the convenience for users to carry out digital signatures

Method used

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  • Digital signature method and device
  • Digital signature method and device

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Embodiment Construction

[0081] The technical solutions in the present application will be described below in conjunction with the drawings.

[0082] Zero-knowledge proof (Zero Knowledge Proof), is S.Goldwasser, S.Micali and C.Rackoff proposed in the early 1980s. It refers to those who can prove without providing any useful information to the verifier, the verifier to believe that an assertion is correct. Zero-knowledge proof is essentially an agreement involving two or more parties, that is, two or more parties to complete a series of steps required task. Prover to prove and make believe they know or have a message to the verifier, but the proof can not leak any information about the message proved to the verifier.

[0083] Aspect of the present disclosure, assume that P and Q are an elliptic curve point group elements, elliptic curve point group elements are also referred to as elliptic curve points, then P + Q and Q P represents a point addition; [K] P k represents a point P of an elliptic curve point ...

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Abstract

The invention provides a digital signature method in the field of information security. In the technical scheme, the private key of the user is divided into two shares, one of the shares is generated by the password of the user, and the other share is stored in the server. In the invention, the private key share stored by the user is not fixedly stored on a certain local device of the user any more, so that when the user needs to carry out digital signature, the user is not limited to use a fixed local device any more, and the user experience is improved; and therefore, any equipment capable of generating a private key based on the user password can be combined with the server to realize the digital signature, so that the convenience of realizing the digital signature by the user can be improved.

Description

Technical field [0001] The present application relates to the field of network information security, and more particularly, to methods and apparatus for digital signatures. Background technique [0002] The security of the network is mainly network information security, requiring appropriate safety technical measures to provide suitable safety services. The digital signature mechanism is one of the means of ensuring network information security, can solve the forgery, reliance, pretending and tampering with network information. [0003] The digital signature is a number string that only the senders of the information can not be forged. This digital string is also a valid certificate for sending information authenticity to the sender of the information. It is a common physical signature that is like written on paper. [0004] Digital signatures can encrypt information using the information senter's private key to encrypt the information, and transmit to the recipient together with...

Claims

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Application Information

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IPC IPC(8): H04L9/32H04L9/08
CPCH04L9/3226H04L9/3252H04L9/085H04L9/0869H04L9/3218
Inventor 杨艳江黄涛吴双
Owner HUAWEI TECH CO LTD
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