CN107180350B - Method, device and system for multi-party sharing transaction metadata based on block chain - Google Patents
Method, device and system for multi-party sharing transaction metadata based on block chain Download PDFInfo
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- CN107180350B CN107180350B CN201710210973.1A CN201710210973A CN107180350B CN 107180350 B CN107180350 B CN 107180350B CN 201710210973 A CN201710210973 A CN 201710210973A CN 107180350 B CN107180350 B CN 107180350B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q40/00—Finance; Insurance; Tax strategies; Processing of corporate or income taxes
- G06Q40/03—Credit; Loans; Processing thereof
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q40/00—Finance; Insurance; Tax strategies; Processing of corporate or income taxes
- G06Q40/04—Trading; Exchange, e.g. stocks, commodities, derivatives or currency exchange
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
- H04L9/3263—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving certificates, e.g. public key certificate [PKC] or attribute certificate [AC]; Public key infrastructure [PKI] arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
- H04L9/3297—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving time stamps, e.g. generation of time stamps
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/50—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using hash chains, e.g. blockchains or hash trees
Abstract
The invention discloses a method, a device and a system for sharing transaction metadata based on a block chain, which are characterized in that the transaction metadata extracted from transaction data of each party is written into the block chain to form a distributed shared transaction metadata block chain account book, wherein the method comprises the following steps: issuing a digital signature certificate based on a PKI/CA system for each block link point and each transaction party, wherein the digital signature certificate is used for recording transaction metadata and encrypting and signing blocks; desensitizing transaction main body information, extracting transaction metadata from original transaction data, uploading the transaction metadata to a block chain node, confirming the transaction metadata by the transaction main body, writing the confirmed transaction metadata into the block chain by the block chain node, and inquiring the block chain information after a data sharing party is authorized; in the credential issuing business scene, the original transaction and the attached data are encrypted and stored through the storage service module, and the related transaction credentials are provided for the transaction sharing party, the transaction main body and the transaction main body counter party.
Description
Technical Field
The invention relates to the technical field of financial credit investigation information safety, in particular to a method, a device and a system for multi-party sharing transaction metadata based on a block chain.
Background
With the continuous development of internet information technology, the financial industry is also gradually networked, and further emerging internet financial industries such as network lending, consumption finance and the like are gradually increased. The financial business developed on the internet faces several problems as follows:
one, personal or business credit data dimension singleness question: in the field of internet financial lending, the repayment capability of a borrowed person or a borrowed enterprise needs to be comprehensively evaluated, in the field of electronic commerce consumption finance, the commodity installments are provided for a user according to the transaction records of the user, but currently, each platform only has partial personal or enterprise lending or buying and selling information, and the real situation of the borrowed person or enterprise cannot be comprehensively evaluated;
secondly, the problem of personal or enterprise credit data segmentation and hysteresis; at present, most transaction systems are centralized transaction systems, and due to the business safety consideration of the centralized systems providing various services, all parties are reluctant to share business data. The traditional financial credit at present does not summarize data such as debit and credit finance and consumption records of all parties, and can not effectively reflect the credit condition of individuals or enterprises, and the existing credit investigation does not perform modeling analysis on the data at any time, so that the individual or enterprise credit has hysteresis;
and thirdly, when the buyer and the seller have business disputes, the transaction evidence can be fairly and effectively provided.
In reality, the user who is the main subject of transaction only keeps the transaction data on each centralized platform, but the user cannot enjoy the data. In addition, most of the problem solutions rely on a centralized system, related data information is stored in a central database, once the data is not credible or the data is at risk of loss, the authenticity of the data cannot be effectively guaranteed, and once a business dispute occurs, the related transaction credentials can only be issued from the centralized platform to a transaction subject, such as a financial debit and credit party or a buyer and a seller in electronic commerce.
With the invention of digital cryptocurrency such as bitcoin, the block chain technology behind the invention attracts more and more attention as a distributed shared accounting mode. The blockchain technology has the characteristics of decentralization, distributed accounts, extremely difficult transaction tampering and the like, but at the same time, the blockchain technology also has the real situations of anonymity and low transaction efficiency at present, the situations are comprehensively considered, and the respective advantages of the centralization system and the decentralization system are combined, so that the blockchain technology is particularly suitable for being applied to a specific scene of safely sharing transaction data among multiple parties if innovative application is carried out on the blockchain technology.
At present, some enterprises try to introduce the block chain technology into the fields related to personal or enterprise credit records, evidence preservation and real-time transaction, but when businesses are developed in the internet financial industry, how to develop loan wind control and personal and enterprise credit investigation, the potential of the related field for issuing transaction credentials is not fully explored, and how to solve the related problems by using the block chain technology is worth further research.
Disclosure of Invention
Based on the above, the present invention provides a method, an apparatus, and a system for sharing transaction metadata by multiple parties based on a block chain, which provide a solution for sharing transaction information while fully considering the security of transaction data of each party, so as to solve the problems proposed in the background art.
According to one aspect of the invention, a method for sharing transaction metadata by multiple parties based on a block chain is provided, and the method is characterized in that transaction metadata is extracted from transaction data of each party and written into the block chain to form a block chain ledger of distributed shared transaction metadata, and the method comprises the following steps: and (3) registration and authorization: the transaction sharing party, the block chain link points and the transaction main body perform identity authentication and authorization through the registration authorization module, apply for a digital signature certificate based on a PKI/CA system and are used for transaction records and encrypted signatures of blocks; data uploading and confirming: the transaction sharing party extracts transaction metadata subjected to desensitization processing from original transaction data, the transaction metadata are signed and then uploaded to a block chain node, the original transaction and the attached data are stored in an encrypted mode through a storage service module, and a transaction main body confirms the transaction metadata on the block chain node; block chain accounting: each block link point packs the confirmed transaction metadata into blocks, the confirmed blocks are transmitted through a consensus algorithm, a set of distributed shared transaction metadata block chain accounts is finally formed in the whole network, and a timestamp service module provides block chain accounting timestamp and time synchronization service; data query: the data sharing party can inquire the data uploaded by other data sharing parties in the block chain account book after being authorized, and can also inquire the customized data through a data service module; issuing a certificate: the original transaction and the attached data are encrypted and stored through the storage service module, and relevant transaction credentials are provided for the transaction sharing party, the transaction main body and the transaction main body counter party.
Preferably, in the step of registering authorization, the method further comprises: the data sharing direction registration authorization module submits a service signature certificate application, and the block chain node submits a block signature certificate application to the registration authorization module; the block chain node can proxy and forward identity authentication, registration authorization and service signature certificate application of a data sharing party; the registration authorization module adopts a PKI/CA technical system to perform registration authorization management on the block chain nodes and the data sharing party and sends corresponding digital certificates based on public and private key pairs to the block chain nodes and the data sharing party, wherein the block signature digital certificates are sent to the block chain nodes for block digital signature, and the service signature certificates are sent to the data sharing party for transaction record data signature.
Preferably, in the data upload confirmation step, the method further includes: the data share all directions block chain nodes upload transaction metadata records, each note record is stamped with a timestamp and signed by a service signature certificate, and the transaction metadata information comprises three parts of information: transaction body information, service metadata information and transaction credential information; desensitizing personal or business information in the transaction subject information, including: type (personal/business/other), name Hash value, certificate type, certificate number Hash value, collateral information type (none/other), collateral information Hash value; considering the safety of the shared service of each party, the original transaction data of the service is not directly stored in the block record, but the basic transaction information is extracted from the service transaction, and the transaction record is divided into two data, namely a transaction main body and a transaction main body counter party, which are called as service metadata, wherein the service metadata information comprises: type of service (financing/consumption/other), service code, type of transaction (debit/credit/receipt/payment/other), transaction code, currency type (RMB/other), amount, status of transaction (execution/completion/acknowledgement/other), time of transaction, type of adjunct data (none/message/file/other), value of adjunct data Hash.
Optionally, in the step of data upload confirmation, the method further includes: other information of a transaction main body, original transaction records of a service or accessory data generated in the service transaction are uploaded through a data storage service module, the data can be used as accessory data of service metadata, the service metadata only stores a hash value of the accessory data, the accessory data information can be stored after being uniformly encrypted through the storage module according to service requirements, and the accessory data information also needs to be signed by a timestamp and a service signature certificate.
Preferably, in the data upload confirmation step, the method further includes: the data service module launches the transaction metadata on the block chain link points to the transaction main body, after the transaction main body receives the transaction metadata information, on one hand, the transaction information related to the transaction main body and sent by the data sharing party can be confirmed, the transaction data can be guaranteed to be real and effective, and on the other hand, records in the block chain link can be inquired in real time according to the received transaction metadata information.
Preferably, in the block chain accounting step, the method further comprises: the block header information comprises two parts, namely a block header and a block body, wherein the block header comprises information: the method comprises the following steps of firstly, recording the version number, the block ID, the record number, the Hash value of the previous block, the Merkel root of the block, a timestamp, a random number, a custom area and a block signature; the zone block contains a plurality of transaction metadata records.
Optionally, in the step of block chain accounting, the method further includes: in view of the requirement consistency of distributed accounting on time sources, information stored in attached data can be used as a transaction evidence, the correct consistency of the time sources is very critical, the time source module is used for uniformly managing the whole network time, each block chain node is regularly synchronous with the time source service, and the timestamp service module is used for providing timestamp and time synchronization service for the block chain nodes.
Preferably, the data query step further includes: because the blocks formed when each party uploads data are different, the metadata processing cannot reflect the specific service information of each party, and on the other hand, because the desensitization processing is performed on the transaction main body information recorded in the block chain, the information of the transaction main body cannot be reflected under the condition that the original identity information of the transaction main body is not obtained. However, under the condition of obtaining the authorization of the data sharing party and the transaction main body, the obtained data result can provide reference for the parties in carrying out specific services through the analysis and the integration of the data.
Optionally, the credential issuing step further includes: the method can provide related transaction credentials for an information sharing party, a transaction body and a transaction body counter party according to the following process steps, and specifically comprises the following steps: 1. inquiring the block chain metadata transaction records according to the transaction type and the transaction codes, and judging whether even number of metadata transaction records exist at the same time; 2. if the transaction exists, judging whether the transaction is a mutual transaction counterparty, and if the transaction types are mutually loan or transaction, the fund access quantity is consistent; 3. if the transaction counter-party is the transaction counter-party, original transaction information is inquired from the data storage service; 4. and decrypting the original transaction information, calculating a hash value, and if the hash value is consistent with the hash value recorded in the block chain record, determining that the original transaction information is not tampered, and providing the original transaction as a transaction credential.
Preferably, among them, further include: the system comprises a registration authorization module, a storage service module, a timestamp service module and a data service module, wherein the data service module defines a uniform standard interface, and a service provider provides actual service according to the standard interface.
According to another aspect of the present invention, there is provided a device for sharing transaction metadata by multiple parties based on a block chain, wherein the device supports block chain accounting of transaction metadata, and comprises a block chain accounting master node and a block chain accounting slave node, wherein the block chain accounting master node participates in accounting and generates a block book, and transmits transactions and blocks to neighboring nodes; the block chain accounting slave node does not participate in accounting, only transmits transactions and blocks to adjacent nodes, and the plurality of devices form a block chain link point network; the device can accept service registration, data uploading and data query requests of a data sharing party, and can also initiate node registration, certificate application, data access, data storage, timestamp and time synchronization requests to each service module.
Preferably, in the block chain accounting process, the method further comprises: each information sharing party communicates with the block link points through terminal equipment or an API (application program interface) interface and uploads transaction metadata records, each note record contains a timestamp and a service signature certificate signature, the block link points pack the confirmed transaction metadata into blocks, block heads contain timestamps and block signature certificate signatures, the confirmed blocks are spread through a consensus algorithm, and finally a set of distributed shared transaction metadata block chain account book is formed in the whole network.
Preferably, in the process of accepting the request from the data sharing party, the apparatus further includes:
a service registration module: providing a service registration interface for each party sharing data, and forwarding a service authentication request to a registration authorization service module;
the data uploading module: and providing metadata uploading for each party sharing data, and providing uploading modes such as a terminal program or an interface API (application program interface) and the like according to the needs of the data sharing party. The uploaded metadata is directly sent to an adjacent node after node verification;
a data query module: the data inquiry function is provided for each party sharing data, the party of transaction main body and the data service module.
Preferably, in the process that the device initiates the service request to each service module, the method further includes:
node registration request: initiating a block link point registration request to a registration authorization module, applying for a block signature digital certificate, and also applying for a service signature certificate of a data sharing party by proxy forwarding;
and (3) data access request: initiating a data access request to a data service module;
data storage request: initiating a data storage request to a data storage service module;
timestamp service and time synchronization request: and initiating a timestamp service and time synchronization request to a timestamp service module. According to another aspect of the present invention, there is provided a block chain-based multi-party shared transaction metadata system, comprising the above block chain-based multi-party shared transaction metadata apparatus, and a series of distributed service modules, where the distributed service modules define a unified standard interface, and are implemented by a service provider to implement interface services, and the distributed service modules include a registration authorization service module, a data service module, a storage service module, and a time source service module, where:
a registration authorization module: providing identity authentication and authorization service for the data sharing party, the block chain link points and the transaction main body;
a data service module: obtaining unconfirmed transaction metadata from the block link points, and sending the unconfirmed transaction metadata to a transaction main body for transaction metadata confirmation; various data models are built in, and customized data services are provided;
a storage service module: storing a transaction main body and an original transaction record or accessory data generated in a business transaction, requiring encryption storage, and issuing a transaction certificate to each transaction party in certificate issuing;
the timestamp service module: the method provides time stamp service for the block chain nodes, provides time synchronization service for the block chain nodes, and is internally provided with various strategies to support time sources of various time zones.
In the block chain-based multi-party shared transaction metadata method, device and system provided by the invention,
the method has the advantages that the safety of transaction data of each party is guaranteed, meanwhile, a solution for multi-party sharing of transaction information is provided, social resources are saved to the maximum extent, the operability is high, and the scenes that multiple parties need to share data in specific industry fields, such as internet financial credit wind control, electronic commerce consumption financial credit assessment, personal and enterprise credit collection points, transaction certificate issuing security and the like, can be solved. The method can also be used in other scenes in which multiple parties in a specific field need to share data.
Drawings
The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention.
Fig. 1 is a schematic diagram illustrating a method, an apparatus, and a system for sharing transaction metadata by multiple parties based on a blockchain according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a transaction metadata record structure according to an embodiment.
FIG. 3 is a block recording diagram according to an embodiment.
Fig. 4 is a diagram illustrating an embodiment of a transaction agent querying a blockchain transaction record.
Fig. 5 is a schematic diagram illustrating issuing of transaction credentials according to an embodiment.
Fig. 6 is a schematic diagram of an exemplary embodiment of a transaction principal loan wind control assessment.
FIG. 7 is a diagram illustrating an exemplary transaction body credit evaluation.
Fig. 8 is a flow chart showing the links involved in the embodiment of the present invention.
Detailed Description
To describe the present invention in more detail, technical solutions of the present invention are described below in conjunction with the accompanying drawings and detailed description, and although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited by the embodiments set forth herein, but rather these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
The embodiment of the invention provides a method, a device and a system for sharing transaction metadata by multiple parties based on a block chain.
In an embodiment of the present invention, the present invention is embodied in a network system, including: a plurality of business systems, a plurality of block chain nodes, a transaction body, a series of distributed service modules, including: the system comprises a registration authorization service module, a data service module, a storage service module and a time source service module. The service system is the existing service system of each party sharing data and is communicated with the block link nodes through an API interface. The block chain node is a device of a software system and a hardware system for providing the accounting service, and is divided into an accounting main node and an accounting slave node, wherein the accounting main node can transmit the transaction records and also provide the accounting service, and the accounting slave node only transmits the transaction records. The centralized service module provides functional service for all information sharing parties and the block link points together.
Based on the above network system, the block chain-based multiparty transaction metadata sharing method of the embodiment is shown in fig. 1, and includes:
and (3) registration and authorization: the transaction sharing party, the block chain link points and the transaction main body are registered and authorized through the registration authorization service module, and apply for a digital signature certificate based on a PKI/CA system for transaction record and encrypted signature of the block;
data uploading and confirming: the transaction sharing party extracts transaction metadata subjected to desensitization processing from original transaction data, the transaction metadata are signed and then uploaded to a block chain node, the original transaction and the attached data are stored in an encrypted mode through a storage service module, and a transaction main body confirms the transaction metadata on the block chain node;
block chain accounting: each block link point packs the confirmed transaction metadata into blocks, the confirmed blocks are transmitted through a consensus algorithm, a set of distributed shared transaction metadata block chain accounts is finally formed in the whole network, and a timestamp service module provides block chain accounting timestamp and time synchronization service;
data query: the data sharing party can inquire the data uploaded by other data sharing parties in the block chain account book after being authorized, and can also inquire the customized data through a data service module;
issuing a certificate: the original transaction and the attached data are encrypted and stored through the storage service module, and relevant transaction credentials are provided for the transaction sharing party, the transaction main body and the transaction main body counter party.
In the registration authorization method, further comprising: the data sharing direction registration authorization module submits a service signature certificate application, and the block chain node submits a block signature certificate application to the registration authorization module; the block chain node can proxy and forward identity authentication, registration authorization and service signature certificate application of a data sharing party; the registration authorization module adopts a PKI/CA technical system to perform registration authorization management on the block chain nodes and the data sharing party, and sends corresponding digital certificates based on public and private key pairs to the block chain nodes and the data sharing party, wherein block signature digital certificates used for block digital signatures are sent to the block chain nodes, service signature certificates used for transaction record data signatures are sent to the data sharing party, and the schematic diagram is shown in a service registration and node registration part in fig. 1.
In the data upload confirmation method, the method further comprises: the data share all directions block chain nodes upload transaction metadata records, each note record is stamped with a timestamp and signed by a service signature certificate, and the transaction metadata information comprises three parts of information: transaction body information, service metadata information and transaction credential information; desensitizing personal or business information in the transaction subject information, including: type (personal/business/other), name Hash value, certificate type, certificate number Hash value, collateral information type (none/other), collateral information Hash value; considering the safety of the shared service of each party, the original transaction data of the service is not directly stored in the block record, but the basic transaction information is extracted from the service transaction, and the transaction record is divided into two data, namely a transaction main body and a transaction main body counter party, which are called as service metadata, wherein the service metadata information comprises: the service type (invested/consumed/other), the service code, the transaction type (borrowed/credited/received/paid/other), the transaction code, the currency type (RMB/other), the amount, the transaction status (executed/completed/confirmed/other), the transaction time, the type of the attached data (none/message/file/other), the Hash value of the attached data, and the structure of the transaction metadata record are schematically shown in fig. 2.
In the data upload confirmation method, the method further comprises: other information of a transaction main body, original transaction records of a service or accessory data generated in the service transaction are uploaded through a data storage service module, the data can be used as accessory data of service metadata, the service metadata only stores a hash value of the accessory data, the accessory data information can be stored after being uniformly encrypted through the storage module according to service requirements, and the accessory data information also needs to be signed by a timestamp and a service signature certificate.
In the data upload confirmation method, the method further comprises: the data service module launches the transaction metadata on the block chain link points to the transaction main body, after the transaction main body receives the transaction metadata information, on one hand, the transaction information related to the transaction main body and sent by the data sharing party can be confirmed, the transaction data can be guaranteed to be real and effective, on the other hand, records in the block chain link can be inquired in real time according to the received transaction metadata information, and the block chain information inquiry schematic diagram of the transaction main body is shown in fig. 4.
In the block chain accounting method, further comprising: the block header information comprises two parts, namely a block header and a block body, wherein the block header comprises information: the method comprises the following steps of firstly, recording the version number, the block ID, the record number, the Hash value of the previous block, the Merkel root of the block, a timestamp, a random number, a custom area and a block signature; the block body comprises a plurality of transaction metadata records, and the block chain structure is formed as shown in FIG. 3.
In the step of block chain accounting, further comprising: in view of the requirement consistency of distributed accounting on time sources, information stored in attached data can be used as a transaction evidence, the correct consistency of the time sources is very critical, the time source module is used for uniformly managing the whole network time, each block chain node is regularly synchronous with the time source service, and the timestamp service module is used for providing timestamp and time synchronization service for the block chain nodes.
In the data query method, the method further comprises: because the blocks formed when each party uploads data are different, the metadata processing cannot reflect the specific service information of each party, and on the other hand, because the desensitization processing is performed on the transaction main body information recorded in the block chain, the information of the transaction main body cannot be reflected under the condition that the original identity information of the transaction main body is not obtained. However, under the condition of obtaining the authorization of the data sharing party and the transaction body, the obtained data result can provide reference for the parties to develop specific business by analyzing and integrating the data, the schematic diagram of the transaction body loan wind control evaluation is shown in fig. 6, and the schematic diagram of the transaction body credit evaluation is shown in fig. 7.
The certificate issuing method further comprises the following steps: the method can provide related transaction credentials for an information sharing party, a transaction body and a transaction body counter party according to the following process steps, and specifically comprises the following steps: 1. inquiring the block chain metadata transaction records according to the transaction type and the transaction codes, and judging whether even number of metadata transaction records exist at the same time; 2. if the transaction exists, judging whether the transaction is a mutual transaction counterparty, and if the transaction types are mutually loan or transaction, the fund access quantity is consistent; 3. if the transaction counter-party is the transaction counter-party, original transaction information is inquired from the data storage service; 4. and decrypting the original transaction information, calculating a hash value, and if the hash value is consistent with the hash value recorded in the blockchain record, determining that the original transaction information is not tampered, and providing the original transaction as a transaction credential, wherein a schematic diagram of a transaction credential presentation flow is shown in fig. 5.
In the method, among others, further comprising: the system comprises a registration authorization module, a storage service module, a timestamp service module and a data service module, wherein the data service module defines a uniform standard interface, and a service provider provides actual service according to the standard interface.
According to another aspect of the present invention, a device for sharing transaction metadata by multiple parties based on a block chain is provided, wherein block chain accounting of the transaction metadata is supported, and further divided into a block chain accounting master node and a block chain accounting slave node, wherein the block chain accounting master node participates in accounting and generates a block account book, and transmits a transaction and a block to an adjacent node; the block chain accounting slave node does not participate in accounting, only transmits transactions and blocks to adjacent nodes, a plurality of devices form a block chain link point network, the device can accept service registration of a data sharing party, upload metadata and a data query request, and can also initiate node registration, data access, data storage and a timestamp and time synchronization request to each service module, and the working diagram of the device is shown in figure 1.
In the block chain accounting process, the method further comprises the following steps: each information sharing party communicates with the block link points through terminal equipment or an API (application program interface) interface and uploads transaction metadata records, each note record contains a timestamp and a service signature certificate signature, the block link points pack the confirmed transaction metadata into blocks, block heads contain timestamps and block signature certificate signatures, the confirmed blocks are spread through a consensus algorithm, and finally a set of distributed shared transaction metadata block chain account book is formed in the whole network.
In the process of accepting the request of the data sharing party, the device further comprises:
a service registration module: providing a service registration interface for each party sharing data, and forwarding a service authentication request to a registration authorization service module;
the data uploading module: and providing metadata uploading for each party sharing data, and providing uploading modes such as a terminal program or an interface API (application program interface) and the like according to the needs of the data sharing party. The uploaded metadata is directly sent to an adjacent node after node verification;
a data query module: the data inquiry function is provided for each party sharing data, the party of transaction main body and the data service module.
In the process that the device initiates the service request to each service module, the method further comprises the following steps:
node registration request: initiating a block link point registration request to a registration authorization module, applying for a block signature digital certificate, and also applying for a service signature certificate of a data sharing party by proxy forwarding;
and (3) data access request: initiating a data access request to a data service module;
data storage request: initiating a data storage request to a data storage service module;
timestamp service and time synchronization request: and initiating a timestamp service and time synchronization request to a timestamp service module.
According to another aspect of the present invention, there is provided a block chain-based multi-party shared transaction metadata system, comprising the above block chain-based multi-party shared transaction metadata apparatus, and a series of distributed service modules, where the distributed service modules define a unified standard interface, and are implemented by a service provider to implement interface services, and the distributed service modules include a registration authorization service module, a data service module, a storage service module, and a time source service module, where:
a registration authorization module: providing identity authentication and authorization service for the data sharing party, the block chain link points and the transaction main body;
a data service module: obtaining unconfirmed transaction metadata from the block link points, and sending the unconfirmed transaction metadata to a transaction main body for transaction metadata confirmation; various data models are built in, and customized data services are provided;
a storage service module: storing a transaction main body and an original transaction record or accessory data generated in a business transaction, requiring encryption storage, and issuing a transaction certificate to each transaction party in certificate issuing;
the timestamp service module: the system is characterized in that a timestamp service is provided for the block chain nodes, a time synchronization service is provided for the block chain nodes, various strategies are arranged in the system to support time sources of various time zones, and the working diagram of the system is shown in figure 1.
In addition, in order to further understand the present invention, fig. 8 is a flowchart illustrating various links involved in the above embodiments of the present invention; as shown in fig. 8, the above embodiments of the present invention mainly relate to an information sharing party, a block link point, a transaction party, a transaction counter party, and a service module; in steps 1, 2, 3, 4, registering with a registration authorization module; step 5, transmitting transaction metadata to the block link points for information sharing; step 6, uploading the auxiliary data to a data storage module; step 7, step 8, step 9 and step 10 are that the data service module inquires the transaction metadata from the block chain nodes, and transmits the transaction metadata to the transaction party and the transaction counter-party; step 11, accounting is carried out on the block link points; step 12, 13, inquiring transaction metadata records in the block chain for the data sharing party; step 14, 15, inquiring transaction metadata records in the block chain for a transaction party; step 16, 17, inquiring transaction metadata records in the blockchain for the transaction counter party; step 18, 19 is the data sharing direction data service module to inquire the customized data; step 20, 21, initiating time synchronization inquiry to a time source module for the block chain link points; steps 22, 23, 24 and 25 are used for inquiring the transaction certificate for the data sharing party; steps 26, 27, 28, 29 inquire the transaction certificate for the transaction party; steps 30, 31, 32, 33 query the transaction credentials for the transaction counter-party.
The foregoing description of the embodiments is provided to enable one of ordinary skill in the art to make and use the invention, and it is to be understood that other modifications may be made to the embodiments, and the generic principles defined herein may be applied to other embodiments without the use of inventive faculty, and accordingly, the invention is not limited to the embodiments described above, and variations and modifications of the invention may occur to those skilled in the art based on the teachings herein.
Claims (11)
1. A distributed shared transaction metadata method based on a blockchain is characterized in that transaction metadata extracted from transaction data of each party is written into the blockchain to form a distributed shared transaction metadata blockchain account book, and the method comprises the following steps:
and (3) registration and authorization: the transaction sharing party, the block chain link points and the transaction main body perform identity authentication and authorization through the registration authorization service module, apply for a digital signature certificate based on a PKI/CA system and are used for transaction records and encrypted signatures of the blocks;
data upload confirmation: the transaction sharing party extracts desensitized transaction metadata from original transaction data, the transaction metadata is signed and then uploaded to a block chain node, a transaction main body confirms the transaction metadata on the block chain node, a data service module sends the transaction metadata on the block chain node to the transaction main body, and after the transaction main body receives transaction metadata information, the transaction main body confirms self-related transaction information sent by the data sharing party on one hand, and ensures that the transaction data is real and effective, and on the other hand, records in the block chain node are inquired in real time according to the received transaction metadata information;
block chain accounting: each block link point packs the confirmed transaction metadata into blocks, the confirmed blocks are transmitted through a consensus algorithm, a set of distributed shared transaction metadata block chain accounts is finally formed in the whole network, and a timestamp service module provides block chain accounting timestamp and time synchronization service;
data query: the data sharing party can inquire the data uploaded by other data sharing parties in the block chain account book after being authorized, and can also inquire customized data through the data service module, because blocks formed when each party uploads the data are different, the data cannot reflect the specific service information of each party after being processed by metadata, on the other hand, because desensitization processing is carried out on the transaction subject information recorded in the block chain, the information of the transaction subject cannot be reflected under the condition that the original identity information of the transaction subject is not obtained, but under the condition that the data sharing party and the transaction subject are authorized, the obtained data result can provide reference for each party when the specific service is carried out through analysis and integration of the data;
issuing a certificate: the method comprises the following steps of encrypting and storing original transaction and attached data through a storage service module, providing relevant transaction credentials for a transaction sharing party, a transaction main body and a transaction main body counter party, and providing the relevant transaction credentials for the information sharing party, the transaction main body and the transaction main body counter party according to the following flow steps: 1. inquiring the block chain metadata transaction records according to the transaction type and the transaction codes, and judging whether even number of metadata transaction records exist at the same time; 2. if the transaction exists, judging whether the transaction is a mutual transaction counterparty, and if the transaction types are mutually loan or transaction, the fund access quantity is consistent; 3. if the transaction counter-party is the transaction counter-party, original transaction information is inquired from the data storage service; 4. decrypting the original transaction information, calculating a hash value, and if the hash value is consistent with the hash value recorded in the block chain record, determining that the original transaction information is not tampered, and providing the original transaction as a transaction certificate;
the original business transaction data is not directly stored in a block record, but basic transaction information is extracted from the business transaction, and the transaction data is divided into two data, namely a transaction main body and a transaction main body counter party, which are called as business metadata;
other information of a transaction main body, original transaction records of a service or accessory data generated in the service transaction are uploaded through a data storage service module, the data serve as accessory data of service metadata, the service metadata only store a hash value of the accessory data, the accessory data information is stored after being uniformly encrypted through a storage module, and data of the storage module needs to be signed by a timestamp and a service signature certificate.
2. The method of claim 1, wherein the step of registering authorization further comprises: the data sharing direction registration authorization service module submits a service signature certificate application, and the block chain node submits a block signature certificate application to the registration authorization service module; the block chain node can proxy and forward identity authentication, registration authorization and service signature certificate application of a data sharing party; the registration authorization service module adopts a PKI/CA technical system to perform registration authorization management on the block chain nodes and the data sharing party and sends corresponding digital certificates based on public and private key pairs to the block chain nodes and the data sharing party, wherein the block signature digital certificates are sent to the block chain nodes for block digital signature, and the service signature certificates are sent to the data sharing party for transaction record data signature.
3. The method of claim 1, wherein the data upload confirmation step further comprises: the data share all directions block chain nodes upload transaction metadata records, each note record is stamped with a timestamp and signed by a service signature certificate, and the transaction metadata information comprises three parts of information: transaction body information, service metadata information and transaction credential information; desensitizing personal or business information in the transaction subject information, including: type (2): person/business/other, name Hash value, certificate type, certificate number Hash value, type of attached information: none/other, collateral information Hash value; the service metadata information includes: and (4) service type: financing/consumption/others, business coding, transaction type: debit/credit/receive/credit/other, transaction code, currency type: RMB/other, amount, transaction status: execution/completion/confirmation/others, transaction time, collateral data type: none/message/file/other, attached data Hash value.
4. The method of claim 1, wherein the step of block chain accounting further comprises: the block header information comprises two parts, namely a block header and a block body, wherein the block header comprises information: the method comprises the following steps of firstly, recording the version number, the block ID, the record number, the Hash value of the previous block, the Merkel root of the block, a timestamp, a random number, a custom area and a block signature; the zone block contains a plurality of transaction metadata records.
5. The method of claim 1, wherein the step of block chain accounting further comprises: in view of the requirement consistency of distributed accounting on time sources, information stored in attached data can be used as a transaction evidence, the correct consistency of the time sources is very critical, the time source module is used for uniformly managing the whole network time, each block chain node is regularly synchronous with the time source service, and the timestamp service module is used for providing timestamp and time synchronization service for the block chain nodes.
6. The method of claim 1, further comprising: the system comprises a registration authorization module, a storage service module, a timestamp service module and a data service module, wherein the data service module defines a uniform standard interface, and a service provider provides actual service according to the standard interface.
7. A device for sharing transaction metadata by multiple parties based on a block chain is characterized in that block chain accounting of the transaction metadata is supported, and the device comprises a block chain accounting main node and a block chain accounting slave node, wherein the block chain accounting main node participates in accounting and generates a block account book, and transmits transactions and blocks to adjacent nodes; the block chain accounting slave node does not participate in accounting, only transmits transactions and blocks to adjacent nodes, and the plurality of devices form a block chain link point network; the device can accept the business registration, data uploading and data query requests of a data sharing party, and can also initiate node registration, certificate application, data access, data storage and timestamp and time synchronization requests to each service module, the original business data is not directly stored in a block record, but basic business information is extracted from the business transaction, and the business data is divided into two data, namely a business main body and a counter party of the business main body, which are called as business metadata;
other information of a transaction main body, original transaction records of a service or accessory data generated in the service transaction are uploaded through a data storage service module, the data serve as accessory data of service metadata, the service metadata only store a hash value of the accessory data, the accessory data information is stored after being uniformly encrypted through a storage module, and data of the storage module needs to be signed by a timestamp and a service signature certificate.
8. The apparatus of claim 7, wherein in the block chain accounting process, further comprising: each information sharing party communicates with the block link points through terminal equipment or an API (application program interface) interface and uploads transaction metadata records, each note record contains a timestamp and a service signature certificate signature, the block link points pack the confirmed transaction metadata into blocks, block heads contain timestamps and block signature certificate signatures, the confirmed blocks are spread through a consensus algorithm, and finally a set of distributed shared transaction metadata block chain account book is formed in the whole network.
9. The apparatus of claim 7, wherein in the device accepting the data sharer request, further comprising:
a service registration module: providing a service registration service interface for each party sharing data, and forwarding a service authentication request to a registration authorization module;
the data uploading module: providing metadata uploading for each party sharing data, providing a terminal program or an interface API according to the needs of the data sharing party, and broadcasting the uploaded metadata to adjacent nodes after node verification;
a data query module: the data inquiry function is provided for each party sharing data, the party of transaction main body and the data service module.
10. The apparatus of claim 7, wherein in the process of the apparatus initiating the service request to each service module, the apparatus further comprises:
node registration request: initiating a block link point registration request to a registration authorization module, applying for a block signature digital certificate, and also applying for a service signature certificate of a data sharing party by proxy forwarding;
and (3) data access request: initiating a data access request to a data service module;
data storage request: initiating a data storage request to a data storage service module;
timestamp service and time synchronization request: and initiating a timestamp service and time synchronization request to a timestamp service module.
11. A multi-party shared transaction metadata system based on a block chain, comprising the apparatus of any one of claims 7 to 10, and a series of distributed service modules, wherein the distributed service modules define a unified standard interface, and implement interface services by service providers, and the distributed service modules include a registration authorization service module, a data service module, a storage service module, and a time source service module, wherein:
a registration authorization module: providing identity authentication and authorization service for the data sharing party, the block chain link points and the transaction main body;
a data service module: obtaining unconfirmed transaction metadata from the block link points, and sending the unconfirmed transaction metadata to a transaction main body for transaction metadata confirmation; various data models are built in, and customized data services are provided;
a storage service module: storing a transaction main body and an original transaction record or accessory data generated in a business transaction, requiring encryption storage, and issuing a transaction certificate to each transaction party in certificate issuing;
the timestamp service module: the method provides time stamp service for the block chain nodes, provides time synchronization service for the block chain nodes, and is internally provided with various strategies to support time sources of various time zones.
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| CN202110502256.2A CN113111387A (en) | 2017-03-31 | 2017-03-31 | Method, device and system for sharing transaction metadata information among multiple financial asset parties based on block chain |
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| CN107180350A (en) | 2017-09-19 |
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| CN113111387A (en) | 2021-07-13 |
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