CN108809932B - Block chain-based deposit certificate system, method and readable medium - Google Patents
Block chain-based deposit certificate system, method and readable medium Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
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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
- G06F21/60—Protecting data
- G06F21/602—Providing cryptographic facilities or services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
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- H04L67/1095—Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1097—Protocols in which an application is distributed across nodes in the network for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/12—Applying verification of the received information
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Abstract
The invention provides a block chain-based certificate storing system, a block chain-based certificate storing method and a readable medium, wherein the system comprises at least one first client and at least one server, wherein the at least one first client sends a certificate storing request to the at least one server and sends a certificate storing file to the at least one server; and at least one server is provided with a certificate storage database, stores the certificate storage file in the certificate storage database based on a block chain technology according to the received certificate storage request, and generates an indication digital fingerprint for the certificate storage file. The evidence storage file is stored by adopting a blockchain technology, the evidence is stored and preserved from the beginning of the life cycle of the evidence storage file, the electronic data file is completely transmitted to the server in real time, and evidence solidification and persistent storage are realized.
Description
Technical Field
The invention relates to the technical field of data security, in particular to a block chain-based deposit certificate system, a block chain-based deposit certificate method and a readable medium.
Background
With the popularization of computer and network technologies, electronic commerce and trade activities and many other network-based interpersonal communications are emerging, and electronic files have become important carriers for transferring information and recording facts. In these aspects, once a dispute or case occurs, the related electronic file becomes important evidence. Electronic evidence (digitalEidce) is electronic data that has been studied as evidence that can prove case-related facts.
However, the existing electronic evidence is difficult to be approved by the public certificate authority, the judicial authority and the like due to the defects of easy extinction and easy tampering, meanwhile, faults such as flaws, breakpoints, incomplete evidence and the like are easily caused in the transmission process, and in the transferring and transferring processes of electronic data generation, solidification, evidence storage, storage and subsequent evidence use, the risk of data tampering is increased, and the integrity is damaged. How to completely store electronic evidence for use by notary authorities and the like is a great technical challenge.
Disclosure of Invention
The present invention provides the following technical solutions to overcome the above-mentioned drawbacks in the prior art.
A bankcard system based on block chain, the system includes at least one first client and at least one server, the said at least one first client sends the bankcard request to the said at least one server, and send the bankcard file to the said at least one server;
the server is provided with a certificate storage database, the certificate storage file is stored in the certificate storage database by the server based on a block chain technology according to the received certificate storage request, and an indication digital fingerprint is generated for the certificate storage file.
Further, after receiving the certificate storing request, the at least one server sends a response allowing sending of the certificate storing file to the first client, and the first client transmits the certificate storing file to the server after receiving the response.
Further, the certificate storage file is a text file, a video file, an image file and/or a sound file, and further comprises an original generation date of the certificate storage file, a serial number of the certificate storage file, certificate storage personnel information and/or a certificate storage date.
More specifically, the certificate storing database is a distributed database composed of a plurality of databases, each database including:
the judicial evidence storage module is used for storing the evidence storage file into the judicial evidence storage module according to the requirements of judicial evidence storage and generating a first digital fingerprint according to an encryption algorithm;
the block chain certificate storage module is used for storing the certificate storage file or the first digital fingerprint in the block chain certificate storage module and generating a second digital fingerprint according to an encryption algorithm;
the digital fingerprint fusion module is used for encrypting and fusing the first digital fingerprint and the second digital fingerprint to generate the indicating digital fingerprint;
the system comprises a plurality of database block chain evidence storage modules, wherein each database block chain evidence storage module forms a block chain, each block chain evidence storage module is a storage node in the block chain, the evidence storage files written into any block chain evidence storage module in the block chain can be automatically synchronized into all other block chain evidence storage modules, and the indication digital fingerprint points to the evidence storage files corresponding to the first digital fingerprint and the second digital fingerprint.
Further, the system further comprises:
and the second client sends a notarization request to the server, the server acquires the evidence storage file from the evidence storage database based on the notarization request and sends the evidence storage file to the second client, and the second client carries out offline notarization on the evidence storage file.
Further, the notarization request includes a certification documentation name, a certification documentation number, a certification documentation type, and/or a certification date.
Furthermore, the server acquires the indication digital fingerprint based on the notarization request, analyzes the indication digital fingerprint, acquires the evidence storage file from a judicial evidence storage module and a block chain evidence storage module respectively through the analyzed indication digital fingerprint, judges whether the evidence storage files acquired from the judicial evidence storage module and the block chain evidence storage module are consistent, and sends the evidence storage file to the second client for the offline notarization.
The invention also provides a block chain-based evidence storing method, which comprises the following steps:
a step of sending a certificate storage request, in which at least one first client sends the certificate storage request to at least one server and sends a certificate storage file to the at least one server;
and storing the certificate storing file in a certificate storing database on the server by the at least one server based on a block chain technology according to the received certificate storing request, and generating an indicating digital fingerprint for the certificate storing file.
Further, after receiving the certificate storing request, the at least one server sends a response allowing sending of the certificate storing file to the first client, and the first client transmits the certificate storing file to the server after receiving the response.
Further, the certificate storage file is a text file, a video file, an image file and/or a sound file, and further comprises an original generation date of the certificate storage file, a serial number of the certificate storage file, certificate storage personnel information and/or a certificate storage date.
Further, the step of storing the certificate comprises:
a judicial evidence storing step, which is used for storing the evidence storing file into a judicial evidence storing module according to the requirements of judicial evidence storage and generating a first digital fingerprint according to an encryption algorithm;
a block chain certificate storage step, which is used for storing the certificate storage file or the first digital fingerprint in a block chain certificate storage module and generating a second digital fingerprint according to an encryption algorithm;
a digital fingerprint fusion step, which is used for encrypting and fusing the first digital fingerprint and the second digital fingerprint to generate the indicating digital fingerprint;
the evidence storage database is a distributed database consisting of a plurality of databases, a block chain evidence storage module of each database forms a block chain, each block chain evidence storage module is a storage node in the block chain, the evidence storage files in any block chain evidence storage module in the block chain can be automatically synchronized to all other block chain evidence storage modules, and the indication digital fingerprint points to the evidence storage files corresponding to the first digital fingerprint and the second digital fingerprint.
Still further, the method further comprises:
and in the notarization step, a second client sends a notarization request to the server, the server acquires a storage document from the storage database based on the notarization request and sends the storage document to the second client, and the second client carries out offline notarization on the storage document.
Further, the notarization request includes a certification documentation name, a certification documentation number, a certification documentation type, and/or a certification date.
Furthermore, the server acquires the indication digital fingerprint based on the notarization request, analyzes the indication digital fingerprint, acquires the evidence storage file from a judicial evidence storage module and a block chain evidence storage module respectively through the analyzed indication digital fingerprint, judges whether the evidence storage files acquired from the judicial evidence storage module and the block chain evidence storage module are consistent or not, and sends the evidence storage file to the second client for offline notarization if the evidence storage files are consistent.
The present invention also proposes a computer-readable storage medium having stored thereon computer program code which, when executed by a computer, performs any of the methods described above.
The invention has the technical effects that: the invention adopts the block chain technology to store the evidence storage file, intervenes in the evidence storage and preservation from the beginning of the life cycle of the evidence storage file, and completely and timely transmits the electronic data file to the server in real time, and the server can be used for notarization; a plurality of databases in a plurality of servers form a evidence storing mode of a block chain, evidence solidification and persistent preservation are achieved, and due to the fact that each node has evidence, a user can obtain evidence from the block chain at any time and anywhere, indication digital fingerprints are generated by adopting a mode of fusing two digital fingerprints, and the correctness of evidence storing files is guaranteed during evidence obtaining.
Drawings
FIG. 1 is a block diagram of a blockchain-based evidence keeping system of the present invention.
FIG. 2 is a block diagram of a credentialing database of an embodiment of the present invention.
Fig. 3 is a flow chart of a blockchain-based evidence preservation method of the present invention.
FIG. 4 is a flow chart of the credentialing step of the present invention.
Detailed Description
This is described in more detail below with reference to FIGS. 1-4.
Fig. 1 shows a block chain-based evidence storing system of the present invention, which includes at least one first client 1 and at least one server 2, where the at least one first client 1 sends an evidence storing request to the at least one server 2 and sends an evidence storing file to the at least one server 2;
the server system is characterized in that a certificate storage database 3 is arranged on the server 2, the server 2 stores the certificate storage file in the certificate storage database 3 based on a block chain technology according to the received certificate storage request, and generates an indication digital fingerprint for the certificate storage file.
After receiving the certificate storing request, the at least one server 2 sends a response allowing sending the certificate storing file to the first client 1, the first client 1 receives the response and transmits the certificate storing file to the server 2, the server 2 can authenticate the first client 1 and determine whether to allow the certificate storing request of the first client 1 according to the current load of the server 2, and the first client 1 is also called as a requesting client 1.
"electronic evidence" can be classified as 1) word processing files: documents formed by word processing systems are composed of words, punctuation, tables, various symbols, or other encoded text. Files generated by different types of Word processors are not compatible (e.g., Word and WPS), nor are files formed using different code rules directly readable. All of these software, systems, code, along with the textual content, constitute the basic elements of a word processing document. 2) And (3) processing a file by a graph: the graphic data designed or manufactured by the aid of a special software system of the computer can be intuitively known by people through the graphics, so that complex information becomes vivid and clear. 3) Database file: a file consisting of a number of raw data records. The database system has the functions of inputting and storing data, inquiring records and outputting results according to instructions, has high information value, and has practical application and value only after being sorted and summarized. 4) Program files: the computer is used for man-machine communication, and the software is composed of a plurality of program files. 5) Video, audio, and image files: i.e., so-called "multimedia" files, are typically edited through scanning recognition, video capture, audio entry, and the like. That is, the certificate storing file can be a text file, a video file, an image file and/or a sound file, and the original generation date, the number of the certificate storing file, the certificate storing personnel information and/or the certificate storing date of the certificate storing file are generally stored as a part of the certificate storing file when the certificate storing file is stored.
The content of the evidence storage database 3 and the chain evidence storage structure thereof realized based on the block chain are the key points of the invention, and a fingerprint fusion method is also provided for the adaptability, the correctness of the evidence storage file can be ensured by adopting the technology, the evidence storage database 3 is a distributed database consisting of a plurality of databases, and each database comprises:
the judicial evidence storage module 4 is used for storing the evidence storage file into the judicial evidence storage module 4 according to the requirements of judicial evidence storage and generating a first digital fingerprint according to an encryption algorithm; the module is used for storing the certificate storing file to be stored with the requirements of judicial evidence, and can be directly connected with judicial authorities, government agencies and the like for storing data by the judicial authorities and the government agencies.
The block chain technology, bt (block chain technology) for short, also called distributed book technology, is an internet database technology, and is characterized by decentralized and transparent disclosure, so that everyone can participate in database recording. The block chain evidence storing module 5 is constructed based on the technology and is used for storing the evidence storing file or the first digital fingerprint in the block chain evidence storing module 5 and generating a second digital fingerprint according to an encryption algorithm; that is, the evidence storing file may be directly stored in the block of the block chain evidence storing module 5, or the evidence storing file may be stored in the storage module of the evidence storing database and/or the judicial evidence storing module 4, and only the stored digital fingerprint (including the first digital fingerprint of the judicial evidence storing module) is stored in the block of the block chain evidence storing module, and the second digital fingerprint is generated;
and the digital fingerprint fusion module 6 is used for encrypting and fusing the first digital fingerprint and the second digital fingerprint to generate the indicating digital fingerprint.
The encryption algorithm that generates the first and second digital fingerprints may be various types of encryption algorithms, such as a hash algorithm, a symmetric encryption algorithm, and an asymmetric encryption algorithm.
Fig. 2 shows a structure of a block chain, where a block chain evidence storage module 4 of each database forms a block chain, each block chain evidence storage module is a storage node in the block chain, that is, one node is a block chain evidence storage module, and the formed block chain is also referred to as a notarization chain. The certificate storage file written into any block chain certificate storage module in the block chain can be automatically synchronized into all other block chain certificate storage modules 4, and the indication digital fingerprint points to the certificate storage files corresponding to the first digital fingerprint and the second digital fingerprint.
The system further comprises: the second client 7 also serves as a notarization client 7, the second client 7 sends a notarization request to the server 2, the server 2 obtains the evidence storage file from the evidence storage database 3 based on the notarization request and sends the evidence storage file to the second client 7, and the second client 7 carries out offline notarization on the evidence storage file. The notarization request sent by the notarization terminal 7 comprises a notarization file name, a notarization file number, a notarization file type and/or a notarization date.
The server 2 acquires the indication digital fingerprint based on the notarization request, the server 2 analyzes the indication digital fingerprint, acquires the evidence storage file from the judicial evidence storage module and the block chain evidence storage module respectively after analysis, judges whether the evidence storage file is consistent or not from the judicial evidence storage module and the block chain evidence storage module, and sends the evidence storage file to the second client 7 for offline notarization if the evidence storage file is consistent.
According to the requirements of specific notarization places, notarization quantity and the like, notarization positions related to the notarization storage database can be appointed to directly notarize the notarization storage files, so that the notarization efficiency is improved.
When obtaining the evidence-storing file for notarization, the second client 7 needs to pay a certain fee to the server 2, and the two parties can negotiate the fee and also can carry out government pricing, and the payment mode can be online payment or bank transfer and the like.
Fig. 3 shows a block chain-based evidence storing method of the present invention, which includes:
a storage request sending step S1, where at least one client sends a storage request to at least one server, and sends a storage file to the at least one server;
and a certificate storing step S2, wherein the at least one server stores the certificate storing file in a certificate storing database on the server based on a blockchain technology according to the received certificate storing request and generates an indication digital fingerprint for the certificate storing file.
And after receiving the certificate storage request, the at least one server sends a response allowing to send the certificate storage file to the client, and the client transmits the certificate storage file to the server after receiving the response. The server may authenticate the first client, also referred to as a requesting client, and determine whether to allow the request for the first client for the credential based on the current load size of the server.
The evidence storage file can be a text file, a video file, an image file and/or a sound file, and the like, and generally, when the evidence storage file is stored, the original generation date of the evidence storage file, the number of the evidence storage file, the evidence storage personnel information and/or the evidence storage date are also stored as part of the evidence storage file.
The concrete operation of the evidence storing step and the chain evidence storing structure thereof based on the block chain are the important points of the invention, and a fingerprint fusion method is also provided for the adaptability, the correctness of the evidence storing file can be ensured by adopting the technology, and the evidence storing file is not falsified or lost during the evidence storing period, and in particular, fig. 4 shows the evidence storing step S2 of the invention, which comprises the following steps:
a judicial evidence storing step S21, which is used for storing the evidence storing file into a judicial evidence storing module according to the requirements of judicial evidence storage and generating a first digital fingerprint according to an encryption algorithm;
a block chain certificate storage step S22, configured to store the certificate storage file or the first digital fingerprint in a block chain certificate storage module, and generate a second digital fingerprint according to an encryption algorithm;
a digital fingerprint fusion step S23, configured to perform encryption fusion on the first digital fingerprint and the second digital fingerprint to generate the indication digital fingerprint;
the evidence storage database is a distributed database consisting of a plurality of databases, a block chain evidence storage module of each database forms a block chain, each block chain evidence storage module is a storage node in the block chain, the evidence storage files in any block chain evidence storage module in the block chain can be automatically synchronized to all other block chain evidence storage modules, and the indication digital fingerprint points to the evidence storage files corresponding to the first digital fingerprint and the second digital fingerprint.
The proof-keeping system of the present invention is intended to provide evidence to a notary or the like, and therefore, the method further comprises: and a notarization step S3, in which a second client sends a notarization request to the server, the server obtains a notarization storage file from the notarization storage database based on the notarization request and sends the notarization storage file to the second client, and the second client performs offline notarization on the notarization storage file. The notarization request comprises a certification storage file name, a certification storage file number, a certification storage file type and/or a certification storage date.
The server acquires the indication digital fingerprint based on the notarization request, analyzes the indication digital fingerprint, acquires the evidence storage file from a judicial evidence storage module and a block chain evidence storage module respectively through the analyzed indication digital fingerprint, judges whether the evidence storage file acquired from the judicial evidence storage module and the block chain evidence storage module is consistent or not, and sends the evidence storage file to the second client side for offline notarization if the evidence storage file is consistent.
According to the requirements of specific notarization places, notarization quantity and the like, notarization positions related to the notarization storage database can be appointed to directly notarize the notarization storage files, so that the notarization efficiency is improved.
The invention also proposes a computer-readable storage medium having stored thereon computer program code which, when executed by a computer, performs one of the methods described above.
For convenience of description, the above devices are described as being divided into various units by function, and are described separately. Of course, when the present application is implemented, the functions of the units may be implemented in one or more software and/or hardware, where clients and clients in the present application refer to the same content, and a server, and a server in the present application refer to the same content.
From the above description of the embodiments, it is clear to those skilled in the art that the present application can be implemented by software plus necessary general hardware platform. Based on such understanding, the technical solutions of the present application may be essentially or partially implemented in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments of the present application.
Finally, it should be noted that: although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.
Claims (13)
1. A block chain based deposit certificate system, the system comprising at least one first client and at least one server, characterized in that: the at least one first client sends a certificate storage request to the at least one server and sends a certificate storage file to the at least one server; the system comprises at least one server and a plurality of evidence storage databases, wherein the at least one server is provided with an evidence storage database, the evidence storage files are stored in the evidence storage database by the at least one server according to received evidence storage requests based on a block chain technology, the evidence storage database is a distributed database formed by a plurality of databases, and each database comprises: the judicial evidence storage module is used for storing the evidence storage file into the judicial evidence storage module according to the requirements of judicial evidence storage and generating a first digital fingerprint according to an encryption algorithm; the block chain certificate storage module is used for storing the certificate storage file or the first digital fingerprint in the block chain certificate storage module and generating a second digital fingerprint according to an encryption algorithm; the digital fingerprint fusion module is used for encrypting and fusing the first digital fingerprint and the second digital fingerprint to generate the indicating digital fingerprint; the indication digital fingerprint points to the corresponding certificate storage file of the first digital fingerprint and the second digital fingerprint;
each evidence storage database comprises a block chain evidence storage module, the data of the block chain evidence storage module of each evidence storage database form a block chain, each block chain evidence storage module is a storage node in the block chain, the evidence storage file written in any block chain evidence storage module in the block chain can be automatically synchronized to all other block chain evidence storage modules, and an indication digital fingerprint is generated for the evidence storage file.
2. The system of claim 1, wherein: and after receiving the certificate storage request, the at least one server sends a response allowing to send the certificate storage file to the first client, and the first client transmits the certificate storage file to the server after receiving the response.
3. The system of claim 2, wherein the evidence file is a text file, a video file, an image file, and/or a sound file, and the evidence file further comprises an original generation date of the evidence file, a number of the evidence file, evidence storage personnel information, and/or an evidence storage date.
4. The system of claim 1, further comprising: and the second client sends a notarization request to the server, the server acquires the evidence storage file from the evidence storage database based on the notarization request and sends the evidence storage file to the second client, and the second client carries out offline notarization on the evidence storage file.
5. The system of claim 4, wherein the notarization request includes a certification documentation name, a certification documentation number, a certification documentation type, and/or a certification date.
6. The system according to claim 4, wherein the server obtains the indication digital fingerprint based on the notarization request, the server parses the indication digital fingerprint, obtains the evidence storage file from a judicial evidence storage module and a block chain evidence storage module respectively through the parsed indication digital fingerprint, and determines whether the evidence storage files obtained from the judicial evidence storage module and the block chain evidence storage module are consistent, if so, the evidence storage file is sent to the second client for underwriting.
7. A block chain-based evidence storing method is characterized by comprising the following steps: a step of sending a certificate storage request, in which at least one first client sends the certificate storage request to at least one server and sends a certificate storage file to the at least one server; a step of storing the certificate, in which the at least one server stores the certificate storing file in a certificate storing database on the server based on a blockchain technology according to the received certificate storing request, wherein the step of storing the certificate comprises: a judicial evidence storing step, which is used for storing the evidence storing file into a judicial evidence storing module according to the requirements of judicial evidence storage and generating a first digital fingerprint according to an encryption algorithm; a block chain certificate storage step, which is used for storing the certificate storage file or the first digital fingerprint in a block chain certificate storage module and generating a second digital fingerprint according to an encryption algorithm; a digital fingerprint fusion step, which is used for encrypting and fusing the first digital fingerprint and the second digital fingerprint to generate the indicating digital fingerprint; the evidence storing database is a distributed database consisting of a plurality of databases, a block chain evidence storing module of each database forms a block chain, each block chain evidence storing module is a storage node in the block chain, the evidence storing files written into any block chain evidence storing module in the block chain can be automatically synchronized into all other block chain evidence storing modules, and the indicating digital fingerprint points to the evidence storing files corresponding to the first digital fingerprint and the second digital fingerprint;
each evidence storage database comprises a block chain evidence storage module, the data of the block chain evidence storage module of each evidence storage database form a block chain, each block chain evidence storage module is a storage node in the block chain, the evidence storage file written in any block chain evidence storage module in the block chain can be automatically synchronized to all other block chain evidence storage modules, and an indication digital fingerprint is generated for the evidence storage file.
8. The method of claim 7, wherein: and after receiving the certificate storage request, the at least one server sends a response allowing to send the certificate storage file to the first client, and the first client transmits the certificate storage file to the server after receiving the response.
9. The method according to claim 7, wherein the certificate of authenticity file is a text file, a video file, an image file and/or a sound file, and the certificate of authenticity file further comprises an original generation date of the certificate of authenticity file, a number of the certificate of authenticity file, certificate of authenticity information and/or a certificate of authenticity date.
10. The method of claim 7, further comprising: and in the notarization step, a second client sends a notarization request to the server, the server acquires a storage document from the storage database based on the notarization request and sends the storage document to the second client, and the second client carries out offline notarization on the storage document.
11. The method of claim 10, wherein the notarization request comprises a certification documentation name, a certification documentation number, a certification documentation type, and/or a certification date.
12. The method according to claim 10, wherein the server obtains the indication digital fingerprint based on the notarization request, the server parses the indication digital fingerprint, obtains the evidence storage file from a judicial evidence storage module and a block chain evidence storage module respectively through the parsed indication digital fingerprint, and determines whether the evidence storage files obtained from the judicial evidence storage module and the block chain evidence storage module are consistent, if so, the evidence storage file is sent to the second client for underwriting.
13. A computer-readable storage medium, characterized in that the storage medium has stored thereon computer program code which, when executed by a computer, performs the method of any of claims 7-12.
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| CN201810313394.4A CN108809932B (en) | 2018-04-09 | 2018-04-09 | Block chain-based deposit certificate system, method and readable medium |
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| CN201810313394.4A CN108809932B (en) | 2018-04-09 | 2018-04-09 | Block chain-based deposit certificate system, method and readable medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109509095B (en) * | 2018-11-14 | 2023-05-02 | 成都皓图智能科技有限责任公司 | Video active identification method combined with block chain |
| CN110020956B (en) * | 2018-11-26 | 2022-11-22 | 创新先进技术有限公司 | Cross-block-chain interaction method and system, computer equipment and storage medium |
| CN109685503A (en) * | 2018-12-07 | 2019-04-26 | 思力科（深圳）电子科技有限公司 | Referee method based on block chain data safety |
| CN110009336A (en) * | 2018-12-13 | 2019-07-12 | 阿里巴巴集团控股有限公司 | Evidence collecting method and device based on block chain |
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