CN116366273B - Private data sending method based on blockchain - Google Patents
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Abstract
The invention discloses a private data sending method based on a blockchain. The method comprises the following steps: when a first user initiates a service application through an intermediate platform, private data required to be sent by the service request is obtained from a private layer of the intermediate platform, and the private data is encrypted and uplink to a first node of a bottom layer blockchain; and the intermediate platform transmits service application information to a receiver according to the channel identification of the first user so that the receiver acquires the privacy data from the first node of the bottom layer block chain. The technical scheme of the invention realizes the isolation of private data of each transaction party in the transaction process and ensures the transaction safety.
Description
Technical Field
The invention relates to the technical field of private data transmission, in particular to a private data transmission method based on a blockchain.
Background
The supply chain financial platform mainly comprises relevant roles of banks, core enterprises, dealers, suppliers and the like, the core enterprises serve as credit giving institutions to transmit credit to the dealers and the suppliers by means of the platform, and the banks serve as sponsors of the platform to provide financing services for the dealers and the suppliers. In order to meet the diversified financing channels of small and medium enterprises, the platform needs to be butted with different banking channels, a set of butting interfaces needs to be newly opened every time the current supply chain financial platform is butted with one channel, the data and modes transmitted by each set of interfaces are different, additional development cost is caused, and the maintenance cost is higher and higher along with the addition of more sponsors. In addition, the wind control levels among different banks are different, the required trade background data is also different, and the traditional centralized database can not effectively isolate the basic information, the transaction data and the trade background data of the clients.
As blockchain alliance chain technology matures, more and more supply chain financial enterprises apply it to specific scenarios. The characteristics of the block chain that the block chain is not tamperable and the multiparty collaboration change the collaboration mode of the supply chain finance, and multiparty security computation plays a role in solving the data privacy. The distributed account book technology ensures that the information is symmetrical, so that a plurality of participants on a alliance chain share transaction data, and privacy protection can be realized; the intelligent contract technology enables risks to be controllable, the credit transfer process of the enterprise on the chain is recorded on the chain of the blockchain to form contracts, and the credit of the core enterprise is not attenuated after being transferred by a plurality of suppliers according to the characteristic that the blockchain is not tamperable; the encryption account book structure technology ensures that the information is real and traceable. However, two problems remain with the prior art: the method has the advantages that the method can not isolate private data such as transaction data and trade background data, and the supply chain financial platform can not multiplex channel docking technology.
Disclosure of Invention
The invention provides a private data sending method based on a blockchain, which realizes the isolation of private data of each transaction party in the transaction process and ensures the transaction safety.
The embodiment of the invention provides a private data sending method based on a blockchain, which comprises the following steps:
when a first user initiates a service application through an intermediate platform, private data required to be sent by the service request is obtained from a private layer of the intermediate platform, and the private data is encrypted and uplink to a first node of a bottom layer blockchain;
and the intermediate platform transmits service application information to a receiver according to the channel identification of the first user so that the receiver acquires the privacy data from the first node of the bottom layer block chain.
Further, the intermediate platform encrypts the private data to be uplink to the first node of the bottom layer blockchain by calling the API of the integrated billboards connector, and issues service application information to a receiver through the intelligent contract of the billboards connector, so that the receiver calls the API of the integrated billboards connector to acquire the private data from the first node of the bottom layer blockchain;
the BillChainConnector is used for docking the bottom layer block chain, the middle platform and other systems, and comprises an external module and a bottom layer platform SKD module, wherein the external module is used for carrying out data transmission with an external system, and the bottom layer platform SKD module is used for bridging with the middle platform.
Further, the encrypting the private data to the first node of the bottom layer blockchain specifically includes: and calling an API provided by the BillChainConnector to encrypt and uplink the private data to a first node of the bottom layer blockchain according to the channel identifier and the enterprise code pre-configured by the first user, and storing an encryption key in an intelligent contract of the BillChainConnector.
Further, the step of enabling the receiver to obtain the private data from the first node of the underlying blockchain through the intermediate platform includes the following steps:
the receiving party initiates an access privacy data authorization application to the first node so that the first node forwards the access privacy data authorization application to the intermediate platform, and the intermediate platform searches the first node of the bottom layer blockchain according to a channel identifier and enterprise codes which are preconfigured by the first user and synchronizes the privacy data of the first node to the second node of the receiver in the bottom layer blockchain;
synchronizing the private data of the second node to the private layer of the receiver, decrypting the private data in the private layer of the receiver according to the secret key in the intelligent contract, and obtaining the private data after verifying the private data through a notarization layer; the notarization layer is used for storing fingerprints of the public data and the private data.
Further, the external module comprises a service subscription sub-module, and the intermediate platform and the receiver subscribe corresponding service channels through the service subscription sub-module, so that when the intermediate platform and the receiver transact the same service, the circulation of the service flow is automatically propelled according to the preset service flow.
Further, the intermediate platform issues service application information to a receiver according to the channel identifier of the first user, specifically:
the intelligent contract of the intermediate platform automatically triggers an event processor of the subscribed corresponding service channel, and the event processor issues the service application information to a receiver according to a preset service flow.
Further, when the intermediate platform encrypts and links the private data to the first node of the bottom layer blockchain by calling the API of the integrated billboards connector, the intermediate platform executes corresponding uplink operation according to the data type and size of the private data.
Further, before the first user initiates a service application through the intermediate platform, the private data of the first user is synchronized to the private layer of the intermediate platform.
The embodiment of the invention has the following beneficial effects:
the invention provides a private data sending method based on a blockchain, which effectively isolates private data of enterprises by storing the private data of a first user, namely the private data such as client basic information data, transaction data, trade background data and the like of the enterprise user, into a private layer and carrying out encryption and uplink operation on the private data. The receiver (i.e. the sponsor) needs to obtain authorization and verify according to the data of the notarization layer such as the fingerprint of the notarization layer to access the private data of the enterprise, thereby effectively guaranteeing the privacy of the transaction data and the trade background data of the large-scale clients. Meanwhile, the invention adopts the BillChainConnector to realize the butt joint among the intermediate platform, the blockchain and the system, so that the butt joint of the intermediate platform and the banking system becomes simpler and more efficient, one more interface is not required to be developed for butt joint of one bank, the butt joint efficiency of cross-platform business is greatly improved, and the development cost is saved.
Drawings
FIG. 1 is a flowchart of a method for sending private data based on blockchain according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a BillChainConnector according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a subscription service channel of a billblinconnector according to an embodiment of the present invention;
fig. 4 is a schematic flow chart of a block chain-based private data transmission method according to an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, the method for sending private data based on blockchain according to an embodiment of the present invention includes the following steps:
step S101: when a first user initiates a service application through an intermediate platform, private data required to be sent by the service request is obtained from a private layer of the intermediate platform, and the private data is encrypted and uplink to a first node of a bottom layer blockchain.
As one embodiment, the first user is an enterprise user needing financing, and the intermediate platform is a simple sink platform. After the enterprise user enters the simple sink platform, privacy data (such as transaction data, user data, financing rate and trade background data) of the enterprise user are synchronized to a private layer of the simple sink platform, wherein the privacy data refers to data which is inconvenient for the enterprise user to disclose and related to transactions, and only the enterprise user and authorized organizations can view the privacy data of the private layer. Meanwhile, public data related to the transaction is stored in a notarization layer, and the data stored in the notarization layer can be used as zero knowledge verification basis and comprises fingerprints of transaction behavior data and privacy data.
The simple sink platform, the bottom layer block chain and the banking system are respectively integrated with respective BillChainConnectors (the BillChainConnectors are interface components) and respectively transmit data by calling the respective BillChainConnectors.
As shown in fig. 4, the enterprise user initiates a financing service application through the simple sink platform, and the simple sink platform invokes an API provided by a billbyinconnector of the simple sink platform to encrypt and uplink the private data to a first node of the underlying blockchain according to a channel identifier and an enterprise code pre-configured by the enterprise user, and stores an encryption key in an intelligent contract of the billbyinconnector, where the first node needs to determine according to the channel identifier and the enterprise code pre-configured by the enterprise user. The encryption and uplink process specifically comprises encryption, privacy protection and uplink storage. The encryption process avoids the private data from being stored in the plaintext on the blockchain, and the encrypted key is stored in the smart contract. Because BillChainConnector is a first node that can perform different modes of uplink based on data types, the simple sink platform saves enterprise data to the corresponding blockchain according to channel identifiers and unique enterprise codes configured by the financing enterprise. The intelligent contract is a program which realizes the automatic processing of the traditional contract in the mode of computer instructions.
As shown in fig. 2, the billbchaninconnector integrates the SDK for interfacing with the simple sink platform, and extended functions such as API and hot update that are extended and open to the outside, and is used for interfacing with the bottom layer blockchain, the intermediate platform and other systems, and includes an external module and a bottom layer platform SKD module, where the external module is used for performing data transmission with an external system, and the bottom layer platform SKD module is used for bridging with the intermediate platform. The external module comprises an application data authorization API sub-module, a service subscription sub-module and a data sharing exchange API sub-module. The bottom layer platform SDK module comprises an intelligent contract sub-module and a hot update sub-module.
The external module mainly provides an API for the banking system to interact with the bottom layer block chain, and the operations such as data uplink, data query, application authorization and the like are realized. The operation complexity of transacting financial business by the banking system is reduced to the maximum extent, and the technical reserve depth of the banking system to the bottom layer blockchain is reduced. The bottom layer platform SDK module is used as a bridging layer for connecting the external module and the simple sink platform, and provides a thermal updating function based on an execution engine such as a JVM. The method can facilitate the operations such as upgrading of banking business systems and simple sink platforms.
As shown in fig. 3, the billbeccoinconnector drives the traffic to flow downstream through the service subscription sub-module, changing the asynchronous mode in communication between the banking system (corresponding to the sponsor system in fig. 3) and the simple sink platform in the conventional mode.
The intermediate platform and the receiver subscribe corresponding service channels through the service subscription sub-module, so that the intermediate platform and the receiver automatically push the circulation of the service flow according to the preset service flow when handling the same service. Specifically, when the billboards are integrated, the banking system automatically subscribes to the service channels (such as the gold Shan Kaili channel, the gold single stream channel and the gold single financing channel) corresponding to the simple sink platform. Therefore, when the business on the simple sink platform changes, the banking system automatically triggers a corresponding service subscription event through the intelligent contract and actively pushes the business data to the banking system. Similarly, the simple sink platform can subscribe to the banking channel to automatically advance the banking progress, so as to realize a self-driven mode of business handling.
Step S102: and the intermediate platform transmits service application information to a receiver according to the channel identification of the first user so that the receiver acquires the privacy data from the first node of the bottom layer block chain. The receiver is specifically a banking system.
As one embodiment, the intermediate platform issues the service application information to the receiver according to the channel identifier of the first user, specifically:
the intelligent contract of the intermediate platform automatically triggers an event processor of the subscribed corresponding service channel, and the event processor issues the service application information to a receiver according to a preset service flow.
And the financing enterprise recheck staff rechecks the financing service application on the simple sink platform, and after rechecks, the simple sink platform processes the financing service application through the BillChainConnector.
The intelligent contract of the BillChainConnector automatically triggers a release subscription event processor to release financing service application information to a banking service system, and the banking service system monitors corresponding information to advance a service in the downstream direction. The banking system realizes the butt joint with the bottom layer block chain by integrating the BillChainConnector into the banking system. The banking system does not need to send HTTP request to the simple sink platform to obtain data like the traditional data transmission mode, and the simple sink platform carries out data conversion and then returns the data to the banking system. When a banking system needs any data, the authorization data on the bottom layer block chain can be directly obtained by calling the API of the BillChainConnector, and when a new sponsor joins the alliance chain, a platform operator does not need to do additional interface adaptation work any more, and the new sponsor can dock a simple sink platform through the API provided by the BillChainConnector.
As one embodiment, when the simple sink platform calls the API of the integrated billchain connector to encrypt and upload the private data to the first node of the underlying blockchain, a corresponding uplink operation is executed according to the data type and size of the private data, for example, for file type data, the file is serialized and then stored in a uplink manner, and a large file can be fragmented and stored in a uplink manner; the file can be stored in the file server, then the file is stored in a Hash uplink, and the real data of the file is transmitted through the BillChainConnector when the file data is used.
Step S1021: the receiving direction initiates an access privacy data authorization application to the first node, so that the first node forwards the access privacy data authorization application to the intermediate platform, and the intermediate platform searches the first node of the bottom layer blockchain according to the channel identifier and the enterprise code preconfigured by the first user and synchronizes the privacy data of the first node to the second node of the bottom layer blockchain of the receiving party.
Step S1022: the receiving direction initiates an access privacy data authorization application to the first node, so that the first node forwards the access privacy data authorization application to the intermediate platform, and the intermediate platform searches the first node of the bottom layer blockchain according to the channel identifier and the enterprise code preconfigured by the first user and synchronizes the privacy data of the first node to the second node of the bottom layer blockchain of the receiving party.
As a specific embodiment of step S1021 and step S1022, after the banking system monitors the financing service application of the simple sink platform, the banking system invokes the API provided by the billboards connector to initiate an access privacy data authorization application to the enterprise node in the bottom layer blockchain, and after the enterprise node monitors the invocation request of the banking system, the event processor is automatically triggered by the intelligent contract in the billboards connector of the bottom layer blockchain to forward the access privacy data authorization application to the simple sink platform.
And after the simple sink platform monitors the authorization notification of the enterprise node, calling an API provided by the BillChainConnector to find the corresponding enterprise node (namely the first node) according to the preconfigured channel identifier and the enterprise code, and synchronizing the privacy data of the enterprise node to the bank node (namely the second node).
After the banking system monitors that the authorization application returned by the simple sink platform passes through the callback, the banking system accesses banking nodes on the alliance chain in the bottom layer block chain according to the API provided by the BillChainConnector, and synchronizes the privacy data of the banking nodes to the private layer of the banking system. And obtaining the privacy data of the financing enterprise from the private layer, decrypting the privacy data according to a private key in the intelligent contract, and verifying the privacy data through the notarization layer. After verification, carrying out operations such as dynamic analysis and wind control judgment on the financing application message of the node according to the dynamic rules configured by the rule engine flink, finally obtaining a decision result, and carrying out money release approval.
The invention aims to solve the two main problems that a supply chain financial platform cannot multiplex channel docking technology and cannot isolate privacy data (namely transaction data and trade background data). The invention provides a method for providing one-stop type docking service for bank sponsors and ensuring privacy data isolation by means of alliance chain technology. The simple sink platform is used as a main data producer to establish unique digital identities for all the participants on the platform, business transactions among enterprises are all carried out based on the simple sink platform, transaction detail data including transaction data, user data and trade background data are stored in a private layer, and fingerprints of transaction behavior data and privacy data are stored by utilizing a notarization layer and used as zero knowledge verification basis.
After the simple sink platform links the data, the BillChainConnector processes the business data based on the intelligent contract. If the fund bill financing service of the platform is finished, after the platform is audited and privacy data is linked up, the intelligent contract automatically triggers a release subscription event processor to release the financing information to a banking service system, and the propelling service advances downstream.
And the banking system integrates the BillChainConnector into the banking system to realize the butt joint with the bottom layer block chain. In the invention, the banking system does not need to transmit HTTP request to the simple sink platform to acquire data through a traditional mode, and the simple sink platform converts the data and returns the data to the bank. The invention uses the BillChainConnector to carry out the system docking mode, so that the banking system can keep the independence of the banking system, does not need to depend on an external platform in data interaction, and keeps high self-adaptability and safety. At this time, the billbchaninconnector is just like a database interface of the traditional internet, and when any data is needed by a bank, the authorization data on the bottom layer blockchain can be directly obtained through the interface of the billbchaninconnector. The method can simplify the interaction mode of private data and the butt joint technology of the blockchain platform and a banking system, when a new sponsor joins a alliance chain, a platform operator does not need to do additional interface adaptation work, and the new sponsor can butt joint the platform through an interface provided by the BillChainConnector, so that the transaction efficiency of each participant is improved.
The invention stores the private data such as the client basic information data, the transaction data, the trade background data and the like of the enterprise into the private layer, and encrypts and links the private layer, thereby effectively isolating the private data of the enterprise. The sponsor can access the enterprise data by authorization and verification according to the data such as fingerprints of a notarization layer, so that the privacy of large-scale client transaction data and trade background data is ensured. Meanwhile, the self-grinding and design BillChainConnector is adopted to carry out the butt joint between the platform, the blockchain and the system, so that the butt joint between the intermediate platform and the banking system becomes simpler and more efficient, one more interface is not required to be developed for butt joint of one bank, the service butt joint efficiency is greatly improved, and the cost is saved.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Those skilled in the art will appreciate that implementing all or part of the above-described embodiments may be accomplished by way of computer programs, which may be stored on a computer readable storage medium, which when executed may comprise the steps of the above-described embodiments. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), or the like.
Claims (5)
1. The method for sending the private data based on the blockchain is characterized by comprising the following steps of:
when a first user initiates a service application through an intermediate platform, private data required to be sent by the service request is obtained from a private layer of the intermediate platform, and the private data is encrypted and uplink to a first node of a bottom layer blockchain;
the intermediate platform encrypts the private data to be uplink to a first node of a bottom layer blockchain by calling an API of the integrated BillChainConnector, and issues service application information to a receiver through an intelligent contract of the BillChainConector so that the receiver calls the API of the integrated BillChainConnector to acquire the private data from the first node of the bottom layer blockchain;
the BillChainConnector is used for docking the bottom layer block chain, the middle platform and other systems and comprises an external module and a bottom layer platform SKD module, wherein the external module is used for carrying out data transmission with an external system, and the bottom layer platform SKD module is used for bridging with the middle platform;
the first node encrypting and uplink the private data to the bottom layer blockchain specifically comprises: calling an API provided by a BillChainConnector to encrypt and uplink the private data to a first node of the bottom layer blockchain according to a channel identifier and enterprise codes which are preconfigured by the first user, and storing an encryption key in an intelligent contract of the BillChainConnector;
the intermediate platform issues service application information to a receiver according to the channel identifier of the first user, so that the receiver obtains the privacy data from the first node of the bottom layer blockchain, and the method comprises the following steps:
the receiving party initiates an access privacy data authorization application to the first node so that the first node forwards the access privacy data authorization application to the intermediate platform, and the intermediate platform searches the first node of the bottom layer blockchain according to a channel identifier and enterprise codes which are preconfigured by the first user and synchronizes the privacy data of the first node to the second node of the receiver in the bottom layer blockchain;
synchronizing the private data of the second node to the private layer of the receiver, decrypting the private data in the private layer of the receiver according to the secret key in the intelligent contract, and obtaining the private data after verifying the private data through a notarization layer; the notarization layer is used for storing fingerprints of the public data and the private data.
2. The blockchain-based private data sending method according to claim 1, wherein the external module comprises a service subscription sub-module, and the intermediate platform and the receiver subscribe corresponding service channels through the service subscription sub-module, so that the intermediate platform and the receiver automatically push the circulation of the service flow according to the preset service flow when handling the same service.
3. The blockchain-based private data sending method of claim 2, wherein the intermediate platform sends service application information to a receiver according to the channel identifier of the first user, specifically:
the intelligent contract of the intermediate platform automatically triggers an event processor of the subscribed corresponding service channel, and the event processor issues the service application information to a receiver according to a preset service flow.
4. The blockchain-based private data sending method of claim 3, wherein when the intermediate platform encrypts the private data to the first node of the underlying blockchain by calling the API of its integrated billbainconnector, a corresponding uplink operation is performed according to the data type and size of the private data.
5. The blockchain-based private data transmission method of any of claims 1 to 4, wherein the first user's private data is synchronized to the private layer of the intermediate platform before the first user initiates a service application through the intermediate platform.
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