CN113849782A - Block chain-based electronic signature method and device and electronic equipment - Google Patents

Block chain-based electronic signature method and device and electronic equipment Download PDF

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Publication number
CN113849782A
CN113849782A CN202010593152.2A CN202010593152A CN113849782A CN 113849782 A CN113849782 A CN 113849782A CN 202010593152 A CN202010593152 A CN 202010593152A CN 113849782 A CN113849782 A CN 113849782A
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China
Prior art keywords
signature
file
signed
digital certificate
picture
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Pending
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CN202010593152.2A
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Chinese (zh)
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不公告发明人
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HUADI COMPUTER GROUP CO Ltd
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HUADI COMPUTER GROUP CO Ltd
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Priority to CN202010593152.2A priority Critical patent/CN113849782A/en
Publication of CN113849782A publication Critical patent/CN113849782A/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
    • G06F21/16—Program or content traceability, e.g. by watermarking
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/60—Protecting data
    • G06F21/64—Protecting data integrity, e.g. using checksums, certificates or signatures

Abstract

The application provides an electronic signature method and device based on a block chain and electronic equipment, and relates to the technical field of electronic signatures. Wherein, the method comprises the following steps: generating a digital certificate of a signature event through a CA (certificate authority), and then generating a signature file based on a signature value, the digital certificate, a file to be signed and a signature picture obtained through the digital certificate, so that the authenticity and integrity of electronic information are guaranteed, and the non-repudiation of a signer is realized; in addition, the summary information of the file to be signed, the signed picture and the digital certificate are uploaded to a block chain, so that the digital certificate of a user can be prevented from being lost or the private key is leaked and illegally used by a person, and an electronic contract or a file violating the real intention of the user is signed under the condition that the consent of the digital certificate owner is not obtained, so that unnecessary legal disputes are caused, and serious property loss is brought to the user.

Description

Block chain-based electronic signature method and device and electronic equipment
Technical Field
The application relates to the technical field of electronic signature, in particular to an electronic signature method and device based on a block chain and electronic equipment.
Background
The electronic signature is an expression form of the electronic signature, and the electronic signature operation is converted into the same visual effect as the paper document stamping operation by utilizing an image processing technology.
Electronic signatures are widely used as a signature form to replace conventional paper signatures. At present, in the process of electronic signature, a signing terminal sends a file to be signed uploaded by a user to a signing server, the signing server loads a signature pattern picture into the file to be signed for electronic signature, and the signing server generates a download link based on the file after signature and feeds the download link back to the signing terminal; and signing a download request of the user, downloading and storing the signed file from the download link, and allowing the user to view and use the signed file. However, how to guarantee the authenticity and integrity of electronic information and the undeniability of the signer becomes a problem.
Disclosure of Invention
The embodiment of the application provides an electronic signing method, an electronic signing device and electronic equipment based on a block chain, which ensure the authenticity and integrity of electronic information and the undeniability of a signer, avoid the loss of a digital certificate of a user or the disclosure of a private key to be illegally utilized by the signer, and sign an electronic contract or a file violating the real intention of the user under the condition of not obtaining the consent of a digital certificate owner, thereby causing unnecessary legal disputes and bringing serious property loss to the user.
In a first aspect, an embodiment of the present application provides an electronic signature method based on a block chain, where the method is used for an electronic signature server, and the method includes:
determining hash values of a file to be signed and a signed picture;
sending the hash value to a CA mechanism; the CA mechanism is used for generating a digital certificate, performing signature operation on the hash value based on a private key of the digital certificate to obtain a signature value, and feeding back the signature value and the digital certificate to the signature server;
receiving a signature value and a digital certificate, and generating a signature file based on the signature value, the digital certificate, a file to be signed and a signature picture;
and determining the abstract information of the signature file, and uploading the abstract information of the file to be signed, the signature picture and the digital certificate to the block chain.
Optionally, the method further comprises:
receiving the sent service file information;
and converting the service file information into a file to be signed in a preset format.
Optionally, the file to be signed is a PDF file or an OFD file.
Optionally, the generating a signature file based on the signature value, the digital certificate, the file to be signed, and the signature picture includes:
identifying the file to be signed and determining at least one signature position information;
and synthesizing the signature picture to the at least one signature position.
In a second aspect, an embodiment of the present application provides an electronic signature device based on a block chain, where the device includes:
the determining module is used for determining hash values of the file to be signed and the signed picture;
the sending module is used for sending the hash value to a CA mechanism; the CA mechanism is used for generating a digital certificate, performing signature operation on the hash value based on a private key of the digital certificate to obtain a signature value, and feeding back the signature value and the digital certificate to the signature server;
the generation module is used for receiving the signature value and the digital certificate and generating a signature file based on the signature value, the digital certificate, the file to be signed and the signature picture;
and the uploading module is used for determining the summary information of the signature file and uploading the summary information of the file to be signed, the signature picture and the digital certificate to a block chain.
Optionally, the apparatus further comprises:
the receiving module is used for receiving the sent service file information;
and the conversion module is used for converting the service file information into a file to be signed in a preset format.
Optionally, the file to be signed is a PDF file or an OFD file.
Optionally, the generating module includes:
the identification unit is used for identifying the file to be signed and determining at least one signature position information;
and the synthesizing unit is used for synthesizing the signature picture to the at least one signature position.
In a third aspect, an embodiment of the present application provides an electronic device, including: a processor, a storage medium and a bus, the storage medium storing machine-readable instructions executable by the processor, the processor and the storage medium communicating via the bus when the apparatus is operated, the processor executing the machine-readable instructions to perform the steps of the block chain based electronic signature method as shown in the first aspect.
In a fourth aspect, an embodiment of the present application provides a storage medium, on which a computer program is stored, where the computer program is executed by a processor to perform the steps of the block chain-based electronic signature method as shown in the first aspect.
The application provides an electronic signature method, an electronic signature device and electronic equipment based on a block chain, wherein the hash values of a file to be signed and a signature picture are determined; sending the hash value to a CA mechanism; the CA mechanism is used for generating a digital certificate, performing signature operation on the hash value based on a private key of the digital certificate to obtain a signature value, and feeding back the signature value and the digital certificate to the signature server; receiving the signature value and the digital certificate, and generating a signature file based on the signature value, the digital certificate, the file to be signed and the signature picture; and determining the abstract information of the signature file, and uploading the abstract information of the file to be signed, the signature picture and the digital certificate to a block chain. The digital certificate of the signature event is generated through a CA (certificate authority), and then the signature file is generated based on the signature value, the digital certificate, the file to be signed and the signature picture obtained through the digital certificate, so that the authenticity and the integrity of the electronic information are guaranteed, and the non-repudiation of a signer is realized; in addition, the summary information of the file to be signed, the signed picture and the digital certificate are uploaded to a block chain, so that the digital certificate of a user can be prevented from being lost or the private key is leaked and illegally used by a person, and an electronic contract or a file violating the real intention of the user is signed under the condition that the consent of the digital certificate owner is not obtained, so that unnecessary legal disputes are caused, and serious property loss is brought to the user.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic flowchart illustrating a block chain-based electronic signature method according to an embodiment of the present application;
fig. 2 is a schematic structural diagram illustrating an electronic signature device based on a block chain according to an embodiment of the present application;
fig. 3 shows a schematic structural diagram of an electronic device provided in an embodiment of the present application.
Detailed Description
In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it should be understood that the drawings in the present application are for illustrative and descriptive purposes only and are not used to limit the scope of protection of the present application. Additionally, it should be understood that the schematic drawings are not necessarily drawn to scale. The flowcharts used in this application illustrate operations implemented according to some embodiments of the present application. It should be understood that the operations of the flow diagrams may be performed out of order, and steps without logical context may be performed in reverse order or simultaneously. One skilled in the art, under the guidance of this application, may add one or more other operations to, or remove one or more operations from, the flowchart.
In addition, the embodiments described herein are only a part of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that in the embodiments of the present application, the term "comprising" is used to indicate the presence of the features stated hereinafter, but does not exclude the addition of further features. It should also be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. In the description of the present application, it is also noted that the terms "first," "second," "third," and the like are used merely for distinguishing between descriptions and are not intended to indicate or imply relative importance.
Example one
Fig. 1 is a schematic flow chart illustrating an electronic signature method provided in an embodiment of the present application, where the method is applied to a signature server. As shown in fig. 1, the method may include:
step S101, determining hash values of a file to be signed and a signed picture;
step S102, sending the hash value to a CA mechanism; the CA mechanism is used for generating a digital certificate, performing signature operation on the hash value based on a private key of the digital certificate to obtain a signature value, and feeding back the signature value and the digital certificate to the signature server;
step S103, receiving the signature value and the digital certificate, and generating a signature file based on the signature value, the digital certificate, the file to be signed and the signature picture;
and step S104, determining the summary information of the signature file, and uploading the summary information of the file to be signed, the signature picture and the digital certificate to a block chain.
Specifically, the signature server performs hash processing on the file to be signed and the received signature picture through a hash algorithm to obtain hash values of the file to be signed and the signature picture; the file to be signed is a PDF file or an OFD file, the OFD is a format document format, and the format document format is an electronic document format with a fixed layout presentation effect. The signature picture may be a picture of a name signature, or a picture of a company official seal or a contract seal. The signature body may be a natural person, a legal person or other organization.
A Certificate Authority (CA), that is, an Authority for issuing a digital Certificate, is an Authority responsible for issuing and managing the digital Certificate, and is used as a trusted third party in an e-commerce transaction to undertake the responsibility of verifying the validity of a public key in a public key system.
When a signature authentication request is received by a CA (certificate authority), a digital certificate (signature digital certificate) is generated, a signature operation is performed on the hash value based on a private key of the digital certificate to obtain a signature value, and the signature value and the digital certificate are fed back to a signature server.
The blockchain may be a federation chain or a private chain.
The application provides an electronic signature method based on a block chain, which is characterized in that hash values of a file to be signed and a signed picture are determined; sending the hash value to a CA mechanism; the CA mechanism is used for generating a digital certificate, performing signature operation on the hash value based on a private key of the digital certificate to obtain a signature value, and feeding back the signature value and the digital certificate to the signature server; receiving the signature value and the digital certificate, and generating a signature file based on the signature value, the digital certificate, the file to be signed and the signature picture; and determining the abstract information of the signature file, and uploading the abstract information of the file to be signed, the signature picture and the digital certificate to a block chain. The digital certificate of the signature event is generated through a CA (certificate authority), and then the signature file is generated based on the signature value, the digital certificate, the file to be signed and the signature picture obtained through the digital certificate, so that the authenticity and the integrity of the electronic information are guaranteed, and the non-repudiation of a signer is realized; in addition, the summary information of the file to be signed, the signed picture and the digital certificate are uploaded to a block chain, so that the digital certificate of a user can be prevented from being lost or the private key is leaked and illegally used by a person, and an electronic contract or a file violating the real intention of the user is signed under the condition that the consent of the digital certificate owner is not obtained, so that unnecessary legal disputes are caused, and serious property loss is brought to the user.
The embodiment of the present application provides a possible implementation manner, and the method further includes:
step S105 (not shown in the figure), receiving the sent service file information;
step S106 (not shown in the figure), converting the service file information into a file to be signed in a predetermined format.
The service file information may be obtained by direct query from the server, or may be sent to the signature server by the client.
Specifically, the service file information is converted into files to be signed in a preset format, such as a PDF file and an OFD file; wherein the client may be an APP or web page installed by the user terminal device.
For the embodiment of the application, the problem of the source of the file to be signed is solved.
The embodiment of the present application provides a possible implementation manner, and step S103 includes:
step S1031 (not shown in the figure), which identifies the file to be signed, and determines the signing position information of each signing main body;
step S1032 (not shown), the signature picture is synthesized to the at least one signature position.
Specifically, the position information needing to be signed can be identified and obtained through a natural language understanding technology, such as a name position needing to sign a name, a company name position needing to be covered with a official seal, and then the visa picture is synthesized to at least one signature position.
For the embodiment of the application, the problem of position determination of the signature picture is solved.
Example two
Based on the block chain-based electronic signature method in the foregoing method embodiment, correspondingly, an embodiment of the present application further provides a block chain-based electronic signature device, and fig. 2 shows a schematic structural diagram of the block chain-based electronic signature device provided in the embodiment of the present application.
As shown in fig. 2, the block chain-based electronic visa apparatus may include:
the determining module 201 is configured to determine hash values of a file to be signed and a signed picture;
a sending module 202, configured to send the hash value to a CA mechanism; the CA mechanism is used for generating a digital certificate, performing signature operation on the hash value based on a private key of the digital certificate to obtain a signature value, and feeding back the signature value and the digital certificate to the signature server;
the generating module 203 receives the signature value and the digital certificate, and generates a signature file based on the signature value, the digital certificate, the file to be signed and the signature picture;
the uploading module 204 is configured to determine the summary information of the signature file, and upload the summary information of the file to be signed, the signature picture, and the digital certificate to a block chain.
Wherein, the file to be signed is a PDF file or an OFD file.
The application provides an electronic signature device based on a block chain, and the embodiment of the application determines hash values of a file to be signed and a signature picture; sending the hash value to a CA mechanism; the CA mechanism is used for generating a digital certificate, performing signature operation on the hash value based on a private key of the digital certificate to obtain a signature value, and feeding back the signature value and the digital certificate to the signature server; receiving the signature value and the digital certificate, and generating a signature file based on the signature value, the digital certificate, the file to be signed and the signature picture; and determining the abstract information of the signature file, and uploading the abstract information of the file to be signed, the signature picture and the digital certificate to a block chain. The digital certificate of the signature event is generated through a CA (certificate authority), and then the signature file is generated based on the signature value, the digital certificate, the file to be signed and the signature picture obtained through the digital certificate, so that the authenticity and the integrity of the electronic information are guaranteed, and the non-repudiation of a signer is realized; in addition, the summary information of the file to be signed, the signed picture and the digital certificate are uploaded to a block chain, so that the digital certificate of a user can be prevented from being lost or the private key is leaked and illegally used by a person, and an electronic contract or a file violating the real intention of the user is signed under the condition that the consent of the digital certificate owner is not obtained, so that unnecessary legal disputes are caused, and serious property loss is brought to the user.
The embodiment of the present application provides a possible implementation manner, and specifically, the apparatus 20 further includes:
the receiving module is used for receiving the sent service file information;
and the conversion module is used for converting the service file information into a file to be signed in a preset format.
The embodiment of the present application provides a possible implementation manner, and specifically, the generating module includes:
the identification unit is used for identifying the file to be signed and determining at least one signature position information;
and the synthesizing unit is used for synthesizing the signature picture to the at least one signature position.
The above-mentioned apparatus may be integrated into a device such as a server, and the application is not limited herein. It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the block chain-based electronic signature apparatus may refer to the corresponding process of the block chain-based electronic signature method in the foregoing method embodiment, and is not described in detail in this application.
It should be understood that the above-described apparatus embodiments are merely exemplary, and that the apparatus and method disclosed in the embodiments of the present application may be implemented in other ways. For example, a division of modules into only one logical division of functionality may be implemented in practice in another division, and for example, multiple modules or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or modules through some communication interfaces, and may be in an electrical, mechanical or other form. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. That is, those skilled in the art will appreciate that embodiments of the present application may be implemented in any form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects.
EXAMPLE III
Based on this, the present application further provides a program product, where the program product may be a storage medium such as a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, and the storage medium may store a computer program, and the computer program is executed by a processor to perform the steps of the block chain based electronic signature method in the foregoing method embodiments.
The embodiment of the application provides a computer-readable storage medium, which is characterized in that hash values of a file to be signed and a signed picture are determined; sending the hash value to a CA mechanism; the CA mechanism is used for generating a digital certificate, performing signature operation on the hash value based on a private key of the digital certificate to obtain a signature value, and feeding back the signature value and the digital certificate to the signature server; receiving the signature value and the digital certificate, and generating a signature file based on the signature value, the digital certificate, the file to be signed and the signature picture; and determining the abstract information of the signature file, and uploading the abstract information of the file to be signed, the signature picture and the digital certificate to a block chain. The digital certificate of the signature event is generated through a CA (certificate authority), and then the signature file is generated based on the signature value, the digital certificate, the file to be signed and the signature picture obtained through the digital certificate, so that the authenticity and the integrity of the electronic information are guaranteed, and the non-repudiation of a signer is realized; in addition, the summary information of the file to be signed, the signed picture and the digital certificate are uploaded to a block chain, so that the digital certificate of a user can be prevented from being lost or the private key is leaked and illegally used by a person, and an electronic contract or a file violating the real intention of the user is signed under the condition that the consent of the digital certificate owner is not obtained, so that unnecessary legal disputes are caused, and serious property loss is brought to the user.
Example four
In addition, an electronic device is also provided in this embodiment of the present application, where the electronic device may be a device with data processing capability, such as the above-mentioned personal computer, server, or network device, and fig. 3 shows a schematic structural diagram of the electronic device provided in this embodiment of the present application.
As shown in fig. 3, the electronic device may include: a processor 31, a storage medium 32 and a bus 33, wherein the storage medium 32 stores machine-readable instructions executable by the processor 31, when the electronic device is operated, the processor 31 communicates with the storage medium 32 through the bus 33, and the processor 31 executes the machine-readable instructions to execute the steps of the block chain-based electronic signature method in the foregoing method embodiment.
The embodiment of the application provides electronic equipment, which is characterized in that the hash values of a file to be signed and a signed picture are determined; sending the hash value to a CA mechanism; the CA mechanism is used for generating a digital certificate, performing signature operation on the hash value based on a private key of the digital certificate to obtain a signature value, and feeding back the signature value and the digital certificate to the signature server; receiving the signature value and the digital certificate, and generating a signature file based on the signature value, the digital certificate, the file to be signed and the signature picture; and determining the abstract information of the signature file, and uploading the abstract information of the file to be signed, the signature picture and the digital certificate to a block chain. The digital certificate of the signature event is generated through a CA (certificate authority), and then the signature file is generated based on the signature value, the digital certificate, the file to be signed and the signature picture obtained through the digital certificate, so that the authenticity and the integrity of the electronic information are guaranteed, and the non-repudiation of a signer is realized; in addition, the summary information of the file to be signed, the signed picture and the digital certificate are uploaded to a block chain, so that the digital certificate of a user can be prevented from being lost or the private key is leaked and illegally used by a person, and an electronic contract or a file violating the real intention of the user is signed under the condition that the consent of the digital certificate owner is not obtained, so that unnecessary legal disputes are caused, and serious property loss is brought to the user.
For ease of illustration, only one processor is described in the above electronic device. However, it should be noted that in some embodiments, the electronic device in the present application may further include multiple processors, and thus, the steps performed by one processor described in the present application may also be performed by multiple processors in combination or individually.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. An electronic signature method based on a block chain is applied to a signature server and comprises the following steps:
determining hash values of a file to be signed and a signed picture;
sending the hash value to a CA mechanism; the CA mechanism is used for generating a digital certificate, performing signature operation on the hash value based on a private key of the digital certificate to obtain a signature value, and feeding back the signature value and the digital certificate to the signature server;
receiving the signature value and the digital certificate, and generating a signature file based on the signature value, the digital certificate, the file to be signed and the signature picture;
and determining the abstract information of the signature file, and uploading the abstract information of the file to be signed, the signature picture and the digital certificate to a block chain.
2. The method of claim 1, further comprising:
receiving the sent service file information;
and converting the service file information into a file to be signed in a preset format.
3. The method of claim 1,
the file to be signed is a PDF file or an OFD file.
4. The method according to claim 1, wherein generating a signed file based on the signature value, the digital certificate, the file to be signed, and the signed picture comprises:
identifying the file to be signed and determining at least one signature position information;
and synthesizing the signature picture to the at least one signature position.
5. An electronic signature device based on a block chain, the device comprising:
the determining module is used for determining hash values of the file to be signed and the signed picture;
the sending module is used for sending the hash value to a CA mechanism; the CA mechanism is used for generating a digital certificate, performing signature operation on the hash value based on a private key of the digital certificate to obtain a signature value, and feeding back the signature value and the digital certificate to the signature server;
the generation module is used for receiving the signature value and the digital certificate and generating a signature file based on the signature value, the digital certificate, the file to be signed and the signature picture;
and the uploading module is used for determining the summary information of the signature file and uploading the summary information of the file to be signed, the signature picture and the digital certificate to a block chain.
6. The apparatus of claim 5, further comprising:
the receiving module is used for receiving the sent service file information;
and the conversion module is used for converting the service file information into a file to be signed in a preset format.
7. The apparatus of claim 5, wherein the file to be signed is a PDF file or an OFD file.
8. The apparatus of claim 5, wherein the generating module comprises:
the identification unit is used for identifying the file to be signed and determining at least one signature position information;
and the synthesizing unit is used for synthesizing the signature picture to the at least one signature position.
9. An electronic device, comprising: a processor, a storage medium and a bus, the storage medium storing machine-readable instructions executable by the processor, the processor and the storage medium communicating via the bus when the electronic device is running, the processor executing the machine-readable instructions to perform the steps of the block chain-based electronic signature method according to any one of claims 1 to 4.
10. A readable storage medium, characterized in that the storage medium has stored thereon a computer program which, when being executed by a processor, performs the steps of the block chain based electronic signature method according to any one of claims 1 to 4.
CN202010593152.2A 2020-06-26 2020-06-26 Block chain-based electronic signature method and device and electronic equipment Pending CN113849782A (en)

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Application Number Priority Date Filing Date Title
CN202010593152.2A CN113849782A (en) 2020-06-26 2020-06-26 Block chain-based electronic signature method and device and electronic equipment

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Publication Number Publication Date
CN113849782A true CN113849782A (en) 2021-12-28

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Application publication date: 20211228

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