CN111626731A - Contract signing identity authentication and signature system based on block chain technology - Google Patents
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Abstract
The invention provides a block chain technology-based contract signing identity authentication and signature system, which comprises: signing terminal and block chain database, wherein, signing terminal includes: the authentication module sends the user identity information to the block chain database through the data interaction module to be compared with the user identity information prestored in the block chain database, and the user identity information is authenticated; the document acquisition module creates or receives an electronic document to be signed from the block chain database through the data interaction module; the signature module signs the electronic document to be signed and uploads the signed electronic document to the block chain database for storage. The system of the invention takes the block chain technology as authentication, contract signing, data storage and anti-counterfeiting verification to construct a signing system, directly stores the signed electronic document data into the block chain and adds the timestamp and the address information, thereby ensuring that the signed electronic document cannot be tampered and improving the safety and reliability of the signed electronic document.
Description
Technical Field
The invention relates to the technical field of intelligent contracts, in particular to a contract signing identity authentication and signature system based on a block chain technology.
Background
With the rapid development of the internet, more and more electronic documents come and go. The delivery of many electronic documents requires signatures. At present, with the influence of epidemic situations and the like on the society, many companies or individuals select to work at home, and many documents cannot be transmitted or signed on the spot, so that the document transaction demand with the signature function is more and more.
At present, some signature systems and contract authentication systems also exist on the internet, but most of the systems are based on a central database at present, the system security of a system provider is seriously depended on, and meanwhile, data are also stored in the database of the system provider, and the data security cannot be guaranteed. With the development of the blockchain technology, the application of the blockchain technology cannot be tampered, and the characteristics of distributed accounting, it is very necessary to develop a contract signing identity authentication and signature system based on the blockchain technology.
Disclosure of Invention
In view of the above problems, the present invention is directed to a block chain technology-based contract signing identity authentication and signature system.
The purpose of the invention is realized by adopting the following technical scheme:
a block chain technology-based contract signing identity authentication and signature system comprises: signing terminal and block chain database, wherein, signing terminal includes: authentication module, document acquisition module, signature module and data interaction module, wherein:
the authentication module is used for sending the user identity information to the block chain database through the data interaction module to be compared with the user identity information prestored in the block chain database, and authenticating the user identity information;
the document acquisition module is used for creating or receiving an electronic document to be signed from the block chain database through the data interaction module;
the signature module is used for signing the electronic document to be signed and uploading the signed electronic document to the block chain database for storage.
In one embodiment, the data interaction module uploads the signed electronic document to the block chain database, and binds the timestamp information and the address information with the electronic document.
In one embodiment, the blockchain database may be established based on one or more of a private chain of contract-related parties, a public chain of social public institutions, or a federation chain with admission mechanisms.
In one embodiment, the document acquisition module comprises:
the document receiving unit is used for accessing the block chain database according to the access address sent by the issuing terminal and acquiring the electronic document to be signed from the block chain database, wherein the access address is generated by the issuing terminal after the electronic document to be signed is uploaded to the block chain database;
and the document creating unit is used for creating or importing the electronic document to be signed.
In one implementation mode, when the publishing terminal uploads the electronic document to be signed to the block chain database, the electronic document is encrypted by adopting an asymmetric encryption technology;
the document receiving unit further comprises a decryption unit, and the decryption unit decrypts the electronic document to be signed acquired from the block chain database by using the private key corresponding to the user identity information.
In one embodiment, the data interaction module further comprises an encryption unit;
the data interaction module further comprises: adding document related party information for the signed electronic document;
and the encryption unit is used for encrypting the signed electronic document by adopting an asymmetric encryption technology according to the identity information of the document relevant party when the electronic document is uploaded to the block chain for storage.
In one embodiment, the system further comprises an external terminal module,
and the external terminal module is used for recording the signing process of the electronic document by the user and uploading the recorded signing process image information to the block chain database through the data interaction module.
In one embodiment, the process of signing the electronic document by the user is recorded by the external terminal module, and the process comprises the step of acquiring photo or video information, signed time information and positioning information when the user signs the electronic document.
In one embodiment, the signature module comprises a touch display screen for displaying the electronic document and for a user to electronically sign the electronic document; or
The signature module comprises a dedicated electronic signature device.
In one embodiment, the system further comprises an API module;
the API module is used for carrying out data interaction with external software, and transmitting access address information generated after the electronic document to be signed and the signed electronic document are uploaded to the block chain database through instant messaging software.
In one embodiment, the authentication module further collects one or more identity information of user account password information, certificate information with a chip, iris information and fingerprint information, sends the collected identity information to the block chain database for comparison and verification, and receives a comparison and verification result returned by the block chain database.
The invention has the beneficial effects that: 1) the system of the invention takes the block chain technology as authentication, contract signing, data storage and anti-counterfeiting verification to construct a signing system, directly stores the signed electronic document data into the block chain and adds the timestamp and the address information, thereby ensuring that the signed electronic document cannot be tampered and improving the safety and reliability of the signed electronic document. Meanwhile, all files are transferred based on the block chain database, and the safety of data can be guaranteed.
2) The system of the invention binds the encryption of the electronic document with the user identity information by adopting an asymmetric encryption mode according to the user identity information, and can acquire the related information of the electronic document from the block chain database only after the user passes the identity authentication, thereby ensuring the information privacy of the electronic document and the related party.
3) The whole process of electronic signing is carried out on the user through the external terminal module, and process elements in the signing process are uploaded to the block chain synchronously to be recorded, so that the signing process is safe and controllable, the whole flow data of the whole signature is stored in the block chain database, and the authenticity and the validity of the electronic document signature can be further improved.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.
FIG. 1 is a block diagram of the frame of the present invention;
FIG. 2 is a block diagram of a frame in one embodiment of the present invention;
FIG. 3 is a block diagram of a document acquisition module according to the present invention.
Reference numerals:
signing terminal 1, block chain database 2, publishing terminal 3, authentication module 11, document acquisition module 12, signature module 13, data interaction module 14, external terminal module 15, API module 16, document receiving unit 121, document creation unit 122
Detailed Description
The invention is further described in connection with the following application scenarios.
Referring to fig. 1, a block-chain technology based contract signing identity authentication and signature system is shown, comprising: a signing terminal 1 and a block chain database 2, wherein the signing terminal 1 comprises: authentication module 11, document acquisition module 12, signature module 13 and data interaction module 14, wherein:
the authentication module 11 is configured to send the user identity information to the block chain database through the data interaction module 14, compare the user identity information with the user identity information prestored in the block chain database, and authenticate the user identity information;
the document acquisition module 12 is used for creating or receiving an electronic document to be signed from the block chain database through the data interaction module 14;
the signature module 13 is configured to sign an electronic document to be signed, and upload the signed electronic document to the block chain database through the data interaction module 14 for storage.
The data interaction module 14 is wirelessly connected with the blockchain database 2, so as to realize data interaction between the signing terminal 1 and the blockchain database 2.
In one embodiment, the blockchain database 2 stores encrypted user identity information, and the blockchain database 2 is further configured to store an electronic document to be signed or signed electronic document data uploaded by a user; the block chain database also encrypts the electronic document to be signed or the signed electronic document data, so that the data security is ensured.
In one scenario, a login account and corresponding password information of a user are prestored in a blockchain database and serve as identity information of the user, and the account name and the password information of the user are encrypted into 256 bits of data by adopting an encryption technology and stored in the blockchain database; when the user carries out identity verification in an account name and password mode, the signing terminal sends the account name and the password information to the block chain database for verification, the sent data is compared with data stored on the chain in the block chain database, and a corresponding comparison result is obtained. The identity information is stored in the block chain database for identity comparison and verification, so that the safety of identity authentication can be improved.
According to the embodiment of the invention, the block chain technology is used as a basis to construct the contract signing system, and the signed electronic document data is directly stored in the block chain in the system, so that the signed electronic document can not be tampered, and the security of the signed electronic document is improved.
Wherein the blockchain database can be established based on one or more of a private chain of contract-related parties, a public chain of social public institutions, or a federation chain with admission mechanisms.
In one embodiment, the data interaction module uploads the signed electronic document to the block chain database, and binds the timestamp information and the address information with the electronic document.
In one scenario, for an electronic document with higher privacy, the system uploads the signed electronic document and related data thereof to a private chain or a federation chain node of a party related to the electronic document, so that the privacy of the electronic document is further improved.
In one embodiment, referring to fig. 2 and 3, the document acquisition module 12 includes:
the document receiving unit 121 is configured to access the blockchain database 2 according to an access address sent by the issuing terminal 3, and acquire an electronic document to be signed from the blockchain database, where the access address is generated after the issuing terminal 3 uploads the electronic document to be signed to the blockchain database 2.
In one embodiment, for electronic documents such as contracts, validation tickets, technical validation tables, design drawings, etc. in a business, such electronic documents are typically formulated for the contents of the electronic document by one of the parties to whom the electronic document is related and require signature validation by another of the parties to whom the electronic document is related. Therefore, the system of the invention further comprises a publishing terminal, wherein the publishing terminal is used for sending the edited electronic document to a signing terminal of the signing party by an electronic document provider, carrying out electronic signing by the signing terminal 1 by the signing party and uploading the signed electronic document to the block chain database.
In one scenario, the electronic document further includes related party information (e.g., identity information of the signing party, identity information of the electronic document provider, etc.).
In one embodiment, the publishing terminal 3 encrypts the electronic document to be signed by using an asymmetric encryption technology when uploading the electronic document to the block chain database 2;
the document receiving unit 121 further includes a decryption unit, which decrypts the electronic document to be signed acquired from the blockchain database 2 by using a private key corresponding to the user identity information.
In one embodiment, the data interaction module 14 further comprises an encryption unit;
the data interaction module 14 further comprises: adding document related party information for the signed electronic document;
and the encryption unit is used for encrypting the signed electronic document by adopting an asymmetric encryption technology according to the identity information of the document relevant party when the electronic document is uploaded to the block chain for storage.
In one scenario, an electronic document provider edits an electronic document by adopting a publishing terminal and uploads the identity information of signatory parties to a block chain database together; the signing party acquires the electronic document to be signed from the blockchain through the signing terminal, wherein when the electronic document is acquired from the blockchain database, the document needs to be decrypted through a unique private key corresponding to the signing party identity information, so that the related information of the electronic document is acquired. And after signing, the signing party uploads the electronic document to a block chain database for storage, wherein the electronic document is encrypted by adopting a public key corresponding to the identity information of the party related to the electronic document when the electronic document is uploaded to the block chain, and after the signed document is sent back to an electronic document provider, the provider decrypts the document by adopting a unique private key corresponding to the subset identity information to obtain the signed electronic document.
In the above embodiment, an asymmetric encryption manner is adopted, and the encrypted electronic document can only be viewed by a relevant party through decryption. In the transmission process of signing the electronic document, even if the electronic document falls into users except the related party of the electronic document, the non-related party users cannot decrypt the file, so that the security of the electronic document is greatly improved.
In one embodiment, the document acquisition module 12 includes:
a document creation unit 122, configured to create or import an electronic document to be signed.
In one embodiment, for electronic documents such as loans, certificates, etc. for personal activities, such electronic documents are typically the same as the signing party and the document editing party, which needs to send the signed electronic document to the target user. In view of the above situation, a user can edit or import an electronic document through the document creation unit, sign the electronic document, add related party information (such as signing party identity information, receiving party identity information, and the like) to the electronic document after signing, asymmetrically encrypt the signed electronic document according to the identity information of the related party, and upload the encrypted electronic document to the block chain database.
The system of the invention binds the encryption of the electronic document with the user identity information by adopting an asymmetric encryption mode according to the user identity information, and can acquire the related information of the electronic document from the block chain database only after the user passes the identity authentication, thereby ensuring the information privacy of the electronic document and the related party.
In one embodiment, the system further includes an external terminal module 15,
and the external terminal module 15 is used for recording the signing process of the electronic document by the user and uploading the image information of the recorded signing process to the block chain database 2 through the data interaction module 14.
The external terminal module comprises an intelligent terminal with a photographing or shooting function, such as a camera, a mobile phone, a tablet personal computer and the like.
In one embodiment, the external terminal module 15 records the process of signing the electronic document by the user, including obtaining the photo or video information when the user signs the electronic document, and the signed time information, positioning information, and the like.
In one scenario, when the external terminal module obtains the photo or video information when the user signs the electronic document and uploads the photo or video information to the block chain database, a timestamp and an address are added to the uploaded photo or video information, so that the information can be saved as effective evidence and evidence of electronic signing.
In one implementation, the external terminal module can also record the signing process of the user on the electronic document through the evidence obtaining modes such as photographing, sound recording, screen recording, scanning, video recording, scanning and the like of the handheld device.
In the embodiment, the external terminal module is arranged to record the whole process of electronic signing of the user, and the acquired image or influence information of the signing process is synchronously uploaded to the block chain for recording, so that the authenticity and the effectiveness of the electronic document signing can be further improved.
In one embodiment, the signature module 13 includes a touch screen display for displaying the electronic document and for the user to electronically sign the electronic document;
in one embodiment, the signature module 13 comprises a dedicated electronic signature device.
The implementation mode adopts the electronic signature equipment special for the electronic document, so that the convenience degree of signing the electronic document by the user is improved.
In one embodiment, the system further includes an API module 16;
the API module 16 is configured to perform data interaction with external software, and transmit access address information generated after the electronic document to be signed and the signed electronic document are uploaded to the block chain database through the instant messaging software.
In one scenario, after a provider of an electronic document edits the electronic document at a release terminal, uploading the electronic document to be signed to a block chain for storage; the provider sends the access address of the block chain to the signatory through instant messaging software (such as WeChat, QQ and the like), the signatory accesses the block chain address of the electronic document through the signing terminal, and the electronic document is acquired and signed after identity verification.
In one embodiment, the authentication module 11 further collects one or more kinds of identity information of user account password information, certificate information with a chip, iris information, and fingerprint information, sends the collected identity information to the block chain database for comparison and verification, and receives a comparison and verification result returned by the block chain database.
In a scenario, a user needs to perform identity authentication when logging in the system, after the identity authentication is passed, the signing terminal can receive and decrypt the electronic document which is taken as a relevant party together with the identity information of the user, and further signature operation is performed, so that the authenticity of the signature of the electronic document is improved.
It should be noted that, in the above embodiments, the "issuing terminal" and the "signing terminal" are only used to limit the terminals to perform different functions; however, in one case, the "issuing terminal" and the "signing terminal" may be the same terminal, or in another case, the "issuing terminal" and the "signing terminal" may be terminals having the same function ticket for use by different users, and are not particularly limited herein.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be analyzed by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A block chain technology-based contract signing identity authentication and signature system is characterized by comprising: the system comprises a signing terminal and a block chain database, wherein the signing terminal comprises: authentication module, document acquisition module, signature module and data interaction module, wherein:
the authentication module is used for sending the user identity information to the block chain database through the data interaction module to be compared with the user identity information prestored in the block chain database, and authenticating the user identity information;
the document acquisition module is used for creating or receiving an electronic document to be signed from a block chain database through the data interaction module;
the signature module is used for signing the electronic document to be signed and uploading the signed electronic document to the block chain database for storage through the data interaction module.
2. The system of claim 1, wherein the data interaction module is configured to bind timestamp information and address information with the electronic document when uploading the signed electronic document to a blockchain database.
3. A contracting identity authentication and signature system based on blockchain technology as claimed in claim 1, wherein the blockchain database can be established based on one or more of a private chain of contract related parties, a public chain of social public institutions or a federation chain with admission mechanisms.
4. The system of claim 1, wherein the document acquisition module comprises:
the document receiving unit is used for accessing the block chain database according to an access address sent by the issuing terminal and acquiring the electronic document to be signed from the block chain database, wherein the access address is generated by the issuing terminal after the electronic document to be signed is uploaded to the block chain database;
and the document creating unit is used for creating or importing the electronic document to be signed.
5. The block chain technology-based contract signing identity authentication and signature system of claim 4, wherein the issuing terminal encrypts the electronic document to be signed by using an asymmetric encryption technology when uploading the electronic document to the block chain database;
the document receiving unit further comprises a decryption unit, and the decryption unit decrypts the electronic document to be signed acquired from the block chain database by using a private key corresponding to the user identity information.
6. The system for identity authentication and signature contract based on blockchain technology according to any one of claims 1 to 5, wherein the data interaction module further comprises an encryption unit;
the data interaction module further comprises: adding document related party information for the signed electronic document;
and the encryption unit is used for encrypting the signed electronic document by adopting an asymmetric encryption technology according to the identity information of the document relevant party when the electronic document is uploaded to the block chain for storage.
7. The contracting identity authentication and signature system based on the block chain technology as claimed in claim 1, wherein the system further comprises an external terminal module,
and the external terminal module is used for recording the signing process of the electronic document by the user and uploading the recorded signing process image information to the block chain database through the data interaction module.
8. The contracting identity authentication and signature system based on the block chain technology as claimed in claim 7, wherein the external terminal module records the process of signing the electronic document by the user including acquiring photo or video information, signing time information and signing location information when the user signs the electronic document.
9. The contracting identity authentication and signature system based on the block chain technology as claimed in claim 1, wherein the signature module comprises a touch display screen for displaying the electronic document and providing the user with an electronic signature for the electronic document; or
The signature module comprises a dedicated electronic signature device.
10. The system of claim 1, wherein the system further comprises an API module;
the API module is used for carrying out data interaction with external software, and transmitting access address information generated after the electronic document to be signed and the signed electronic document are uploaded to the block chain database through instant messaging software.
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