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Method for digital signatures capable of establishing reliable correspondence with handwritten signatures

A technology of handwritten signature and digital signature, applied in the field of information security

Active Publication Date: 2013-08-14
BEIJING CERTIFICATE AUTHORITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Among the existing methods, there is no digital signature method applied to the above scenarios

Method used

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  • Method for digital signatures capable of establishing reliable correspondence with handwritten signatures
  • Method for digital signatures capable of establishing reliable correspondence with handwritten signatures

Examples

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Embodiment Construction

[0031] figure 2 It is a flow chart of a digital signature that can establish a reliable correspondence with a handwritten signature. In order to further clarify the technical solution of the present invention, the following combines figure 2 Describe in detail a digital signature process that can establish a reliable correspondence with a handwritten signature. The digital certificate in this example is a specific digital certificate that contains the image of the signer's handwritten signature and the hash value of the document to be signed. The specific steps are as follows:

[0032] Step 1: The signer generates the electronic document M corresponding to the paper document, obtains the handwritten signature image HSig, the hash value H of the document to be signed, and the public key K pu / private keyK pv Yes, the signer keeps the private key K locally pv And the digital certificate Cert=(HSig, H, K issued by the CA center to limit the content of the signature pu , Sig...

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Abstract

The invention relates to a method for digital signatures capable of establishing reliable correspondence with handwritten signatures, in particular to a method for signing digitally on electronic documents corresponding to the handwritten signatures based on a digital certificate for limiting signature contents. In the method, the electronic documents with the digital signatures can be generated while signers write the signatures on paper documents; and the digital signatures of the electronic documents and the handwritten signatures have the characteristics of one-to-one correspondence and non-repudiation.

Description

technical field [0001] The invention relates to a digital signature method capable of establishing a reliable correspondence with a handwritten signature, specifically a method for a signer to digitally sign a specific document using a digital certificate used to limit the content of the signature, which belongs to the field of information security . Background technique [0002] Public key cryptography is generally used in data confidentiality, identity authentication, data integrity protection and non-repudiation in network communication. When using a public key cryptosystem for digital signatures, the signer first generates a pair of public key / private key pair, saves the private key, and at the same time, a digital certificate is issued by a digital certificate authentication center (CA center, Certificate Authority) to bind the public key and signature identity of the signer to ensure that the public key belongs to the signer. [0003] In the signing process of a gene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L9/32
Inventor 林雪焰詹榜华马臣云王秀群
Owner BEIJING CERTIFICATE AUTHORITY
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