CN109614821B - Data exchange server and data transmission system based on block chain - Google Patents
Data exchange server and data transmission system based on block chain Download PDFInfo
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Abstract
The embodiment of the invention relates to the technical field of block chains, and particularly discloses a data exchange server and a data transmission system based on a block chain, wherein the data exchange server comprises: the system comprises a first data communication interface, a processor and a second data communication interface, wherein the first data communication interface is used for receiving a data request sent by a client of a demand party and feeding the data request back to the processor; a processor for sending a data request to a supplier client via a second data communication interface; the second data communication interface is also used for receiving the encrypted demand data and feeding the encrypted demand data back to the processor; the processor is used for feeding back the encrypted demand data to the client of the demand party through the first data communication interface. By the mode, mutual trust among all the business mechanisms can be guaranteed, data sharing can be achieved, and the work efficiency of all the business mechanisms is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of block chains, in particular to a data exchange server and a data transmission system based on a block chain.
Background
Due to the need of work, a plurality of business mechanisms need to cooperate with each other to share data. However, the sharing of complete data cannot be achieved between the respective service organizations due to a problem of area restriction, a problem of trust, and the like. If a business entity wishes to obtain certain data, there are two problems. Firstly, it is unclear which business entity should obtain the data; second, even if it is clear which business entity should obtain the data, the business entity with the data darts not to easily share the source data owned by itself to the business entity due to trust issues. The business organization is worried that the large data can be copied and modified, and the flow direction of the data can not be controlled any more, so that the benefit of the business organization is damaged.
And this also hinders the mutual cooperation between the relevant business organizations, and affects the work efficiency. How to realize mutual trust among all the service organizations and realize data sharing, thereby improving the handling efficiency of the government affairs organizations becomes a technical problem to be solved urgently.
Disclosure of Invention
Therefore, the embodiment of the invention provides a data exchange server and a data transmission system based on a block chain, which are used for solving the problem that the working efficiency of government offices is influenced because the existing related business organizations cannot trust each other and data cannot be shared.
In order to achieve the above object, an embodiment of the present invention provides the following:
in a first aspect of embodiments of the present invention, there is provided a blockchain-based data exchange server, where the data exchange server belongs to a blockchain-based data exchange system, and the system includes: the system comprises a demand side client, a data exchange server and a supply side client; the data exchange server includes: the data exchange server establishes bidirectional communication connection with the client of the demand party through the first data communication interface, and establishes bidirectional communication connection with the client of the supply party through the second data communication interface;
the system comprises a first data communication interface, a second data communication interface and a processor, wherein the first data communication interface is used for receiving a data request sent by a client of a demand party and feeding the data request back to the processor, the data request comprises information corresponding to demand data, an intelligent contract and supplier identification information, and the intelligent contract comprises the demand party identification information; the method comprises the steps that information corresponding to demand data, an intelligent contract and supplier identification information are obtained by inquiring a demand party from a data directory mounted on a block chain, the demand party writes a public key of the demand party into the intelligent contract through a demand party client, the intelligent contract comprises a request limiting condition for the demand data, and a request process record is stored;
the processor is used for sending the data request to the supplier client through the second data communication interface so as to call the demand data according to the information corresponding to the demand data when the supplier client determines that the data request is legal according to the intelligent contract and the supplier identification information; encrypting and feeding back the required data by using the public key;
the second data communication interface is also used for receiving the encrypted demand data and feeding the encrypted demand data back to the processor;
the processor is used for feeding back the encrypted demand data to the client of the demand party through the first data communication interface.
In an embodiment of the present invention, the first data communication interface is specifically configured to receive a data request sent by the client of the demand party through the first middle layer.
In another embodiment of the present invention, the second data communication interface is specifically configured to receive the encrypted demand data sent by the supplier client through the second middle layer, and feed the encrypted demand data back to the processor.
In still another embodiment of the present invention, the information corresponding to the demand data includes at least: key field information and a data request path corresponding to the demand data;
and the second data communication interface is specifically used for sending the key field information, the intelligent contract and the supplier identification information corresponding to the demand data to the supplier client according to the data request path.
In another embodiment of the present invention, when the number of the providers includes at least two, the second data communication interface establishes a bidirectional communication connection with a first provider client of the at least two provider clients, and receives encrypted demand data fed back by the first provider client, where the first provider client is a provider client determined by the at least two provider clients according to a preset protocol, and the first provider client is configured to receive a data request sent by the processor through the second data communication interface and distribute the data request to each of the at least two provider clients; and the system is also used for receiving the sub-demand data fed back by each supplier client according to the data request, summarizing all the sub-demand data to form demand data, and feeding back the demand data to the processor through the second data communication interface after encrypting the demand data.
In another embodiment of the present invention, when the number of the suppliers includes at least two, the second data communication interface establishes a bidirectional communication connection with each supplier client respectively;
the processor respectively sends a data request to each supplier client through the second data communication interface;
the second data communication interface is further used for respectively receiving the encrypted demand sub-demand data fed back by each supplier client and feeding back the encrypted demand sub-demand data to the processor.
In a second aspect of embodiments of the present invention, there is provided a blockchain-based data transmission system, the data transmission system comprising: a requiring side client, a supplying side client and a data exchange server as the first aspect;
the demand side client is used for inquiring and obtaining information corresponding to demand data, an intelligent contract and supplier identification information from a data directory mounted on the block chain, and writing a public key of the demand side into the intelligent contract;
after information corresponding to the demand data, the intelligent contract and the supplier identification information form a data request, sending the data request to a data exchange server;
the supplier client is used for verifying the validity of the data request according to the supplier identification information and the intelligent contract;
when the data request is legal, calling the required data according to the information corresponding to the required data; and encrypting the required data by using the public key and feeding the encrypted data back to the data exchange server.
According to the embodiment of the invention, only the data directory corresponding to the owned data provided by each service organization is mounted on the block chain. The demander can inquire which business mechanism the required data exists in, information corresponding to the required data and the like according to the data directory mounted on the block chain. The demand side can send a data request to the data exchange server through the client side, and the data exchange server sends the data request to the supplier client side. In this process, the demand side needs to comply with an intelligent contract that hangs the supplier on the blockchain to constrain the demand and utilization of data by the demand side. For example, the limitation data can be read only once by the demand side and then invalidated. Furthermore, the entire process of recording data requests is also required. Therefore, the destination and the utilization rate of the data can be effectively controlled. During data request, the supplier needs to verify the validity of the requester, so that whether the data request is legal or not is determined according to the intelligent contract and the supplier identification information. Only in legal condition, calling required data; and encrypting and feeding back the demand data by using the public key. Thereby ensuring the safety of data transmission. By the mode, mutual trust among the business mechanisms can be guaranteed, data sharing can be realized, and the work efficiency of the business mechanisms is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
Fig. 1 is a schematic structural diagram of a data exchange server based on a blockchain according to an embodiment of the present invention;
fig. 2 is a block chain-based data transmission system structure diagram according to another embodiment of the present invention.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
An embodiment 1 of the present invention provides a data exchange server based on a block chain, and specifically, as shown in fig. 1, the data exchange server belongs to a data exchange system based on a block chain, and the system includes a data exchange server, a client of a demand side, and a client of a supply side. The data exchange server includes: the system comprises a first data communication interface 101, a processor 102 and a second data communication interface 103, wherein a data exchange server establishes a bidirectional communication connection with a client of a demand party through the first data communication interface 101, and the data exchange server establishes a bidirectional communication connection with a client of a supply party through the second data communication interface 103.
The first data communication interface 101 is configured to receive a data request sent by a client of a demand side, and feed the data request back to the processor 102.
Specifically, the data request includes information corresponding to the demand data, an intelligent contract and supplier identification information, and the intelligent contract includes the demand party identification information; the method comprises the steps that information corresponding to required data, an intelligent contract and supplier identification information are obtained by inquiring a data catalog mounted on a block chain for a demand party, the demand party writes a public key of the demand party into the intelligent contract through a demand party client as identification information of the demand party, the intelligent contract comprises a request limiting condition for the required data, and a request process record is stored.
Before this, some preparation work needs to be done in advance. For example, the supplier needs to count data owned by itself. The data are classified, and then the attribute information of each type of data is extracted according to a certain rule. Are recorded in the form of key fields on the data directory. Each supplier has a data directory corresponding to it on the block chain. In addition, the data directory may further include at least a data request path corresponding to each type of data, and supplier identification information, that is, supplier identification information. At the same time, the supplier may also enact an intelligent contract to restrict the data-demander's use of the requested data. For example, requirement-side identity information of requesting data, authority to use a data range, time and number of times data is used, and the like may be defined. By means of the smart contracts it is ensured that the use of data is within the control of the supplier. Thereby improving the trust between the supplier and the demander.
When the demand side needs to request data from the supplier, the supplier needs to write its own public key on the intelligent contract, so that the supplier can identify the demand side identity of the requested data.
And the smart contracts also need to record the whole process of data request and use. Therefore, once any accident happens to the use of the data, the corresponding responsibility can be traced according to the record.
A processor 102, configured to send the data request to the supplier client through the second data communication interface 103, so that when the supplier client determines that the data request is legal according to the intelligent contract and the supplier identification information, the supplier client invokes the demand data according to information corresponding to the demand data; and encrypting and feeding back the demand data by using the public key.
Optionally, the information corresponding to the demand data at least includes: key field information corresponding to the demand data and a data request path. The data request is sent to the supplier client, and the second data communication interface 103 is specifically configured to: and sending the key field information, the intelligent contract and the supplier identification information corresponding to the demand data to the supplier client according to the data request path.
The supplier client may determine whether the data request is legitimate based on the intelligent contract and the supplier identification information.
That is, it is first determined from the supplier identification information that the request is sent to itself, requiring itself to be processed. The identity of the claimant then also needs to be determined from the signature information. And determining the authority of the demand party for requesting data according to the intelligent contract. If the above are all met, the data request can be proved to be legal. The supplier can call the demand data from the database of the supplier, and then the public key of the demand party is used for encrypting the demand data and feeding the demand data back to the data exchange server.
The specific execution process is as follows: the supplier client encrypts the demand data using the public key of the demander and then feeds back to the processor 102 via the second data communication interface 103.
That is, the second data communication interface 103 is further configured to receive the encrypted demand data and feed the encrypted demand data back to the processor 102.
The processor 102 is configured to feed back the encrypted demand data to the client of the demand party through the first data communication interface 101.
Optionally, when the number of the providers includes at least two, the second data communication interface 103 establishes a bidirectional communication connection with a first provider client of the at least two provider clients, and receives encrypted demand data fed back by the first provider client, where the first provider client is a provider client determined by the at least two provider clients according to a preset protocol, and the first provider client is configured to receive a data request sent by the processor 102 through the second data communication interface 103 and distribute the data request to each provider client of the at least two provider clients; and the system is further configured to receive sub-demand data fed back by each supplier client according to the data request, aggregate all the sub-demand data to form demand data, and feed back the encrypted demand data to the processor 102 through the second data communication interface 103.
Or, when the number of the providers is at least two, the second data communication interface 103 establishes a bidirectional communication connection with each provider client respectively; the processor 102 distributes the data request to each supplier client through the second data communication interface 103; the second data communication interface 103 is further configured to receive the encrypted demand sub-data fed back by each supplier client, and feed back the encrypted demand sub-data to the processor 102, and the processor 102 performs the same aggregation to form demand data.
Specifically, if the demand side needs result data, the supplier may perform an operation according to the source data and a corresponding algorithm in the self side, that is, the supplier client side, in order to prevent the source data from being leaked, and feed back the result data to the second data communication interface 103 after obtaining the result data.
Alternatively, if the data requested by the requesting party requires separate provision by multiple suppliers, such as a supplier-provided algorithm, a supplier provides the source data. Then, the supplier can customize a supplier client to summarize all contents, including algorithms and source data, and then feed back to the processor 102 through the second data communication interface 103 in a unified manner. And the processor 102 feeds back the algorithm to the client on demand along with the source data. Or, each supplier sends its own data to the processor 102 through the second data communication interface 103, and the processor 102 sends the data to the client of the demander in a unified way.
According to the intelligent contract setting, the client of the demand party does not directly see the algorithm and the data, but needs to obtain the result through sandbox operation. That is, what the demander can see through the client is still only the result data, not the source data and algorithms.
Optionally, in order to improve data transmission performance, data transmission may be performed between the client on the demand side and the first data communication interface 101 through the first intermediate layer. That is, the first data communication interface 101 is specifically configured to receive a data request sent by a client on the demand side through the first middle layer.
The second data communication interface 103 is specifically configured to receive the encrypted demand data sent by the supplier client through the second middle layer, and feed back the encrypted demand data to the processor 102.
And the processor 102 transmits the demand data to the client of the demand party through the first data communication interface 101. And when the data is transmitted to the client of the demand side, the data can be transmitted through the first middle layer. The middle layer encapsulates a Remote Call Protocol (RPC) interface between the client and the data exchange server. And packaging a call interface RPC interface between the supplier client and the data exchange server. In one particular example, the requiring client and the supplying client can be agent machines. The intermediate layer is mainly used for decoupling, simultaneously simplifies the function of the agents, adds the message queues in the intermediate layer, utilizes a set of distributed message queue service, each agent corresponds to a message node, and the agents can process the messages of the message queues concurrently, thereby improving the data transmission performance.
In the data exchange server based on the block chain provided by the embodiment of the invention, only the data directories provided by each service mechanism and corresponding to own data are mounted on the block chain. The demander can inquire which business mechanism the required data exists in, information corresponding to the required data and the like according to the data directory mounted on the block chain. The demand side can send a data request to the data exchange server through the client side, and the data exchange server sends the data request to the supplier client side. In this process, the demand side needs to comply with an intelligent contract that hangs the supplier on the blockchain to constrain the demand and utilization of data by the demand side. For example, the limitation data can be read only once by the demand side and then invalidated. Moreover, the entire process of recording data requests is also required. Therefore, the destination and the utilization rate of the data can be effectively controlled. During data request, the supplier needs to verify the validity of the requester, so that whether the data request is legal or not is determined according to the intelligent contract and the supplier identification information. Only in legal condition, calling the demand data; and encrypting and feeding back the demand data by using the public key. Thereby ensuring the safety of data transmission. By the mode, mutual trust among all the business mechanisms can be guaranteed, data sharing can be achieved, and the work efficiency of all the business mechanisms is improved.
Corresponding to the foregoing embodiment, embodiment 2 of the present invention further provides a data transmission system based on a block chain, and specifically as shown in fig. 2, the system includes: a requiring side client 20, a supplying side client 30 and a data exchange server 10 as described in the above embodiment.
The demand side client 20 is configured to query and obtain information corresponding to demand data, an intelligent contract and supplier identification information from a data directory mounted on the block chain, and write a public key of the demand side in the intelligent contract;
after forming a data request by the information corresponding to the demand data, the intelligent contract and the supplier identification information, sending the data request to the data exchange server 10;
a supplier client 30 for verifying the validity of the data request according to the supplier identification information and the intelligent contract;
when the data request is legal, calling the demand data according to the information corresponding to the demand data; the demand data is encrypted with the public key and fed back to the data exchange server 10.
The functions performed by the data exchange server 10 have been described in detail in the previous embodiment, and will not be described in detail herein.
In the data transmission system based on the block chain provided by the embodiment of the invention, only the data directories provided by each service mechanism and corresponding to own data are mounted on the block chain. The demander can inquire which business mechanism the required data exists in, information corresponding to the required data and the like according to the data directory mounted on the block chain. The demand side can send a data request to the data exchange server through the client side, and the data exchange server sends the data request to the supplier client side. In this process, the demand side needs to comply with an intelligent contract that hangs the supplier on the blockchain to constrain the demand and utilization of data by the demand side. For example, the limitation data can be read only once by the demand side and then invalidated. Moreover, the entire process of recording data requests is also required. Therefore, the destination and the utilization rate of the data can be effectively controlled. During data request, the supplier needs to verify the validity of the requester, so that whether the data request is legal or not is determined according to the intelligent contract and the supplier identification information. Only in legal condition, calling required data; and encrypting and feeding back the demand data by using the public key. Thereby ensuring the safety of data transmission. By the mode, mutual trust among all the business mechanisms can be guaranteed, data sharing can be achieved, and the work efficiency of all the business mechanisms is improved.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (4)
1. A blockchain based data exchange server, wherein the data exchange server belongs to a blockchain based data exchange system, the system comprising: the system comprises a demand side client, a data exchange server and a supply side client; the data exchange server includes: the data exchange server establishes bidirectional communication connection with the client of the demand party through the first data communication interface, and establishes bidirectional communication connection with the client of the supply party through the second data communication interface;
the system comprises a first data communication interface, a second data communication interface and a processor, wherein the first data communication interface is used for receiving a data request sent by a client of a demand party and feeding back the data request to the processor, the data request comprises information corresponding to demand data, an intelligent contract and supplier identification information, and the intelligent contract comprises the demand party identification information; the information corresponding to the demand data, the intelligent contract and the supplier identification information are obtained by inquiring a demand party from a data directory mounted on a block chain, the demand party writes a public key of the demand party into the intelligent contract through the demand party client, the intelligent contract comprises a request limiting condition for the demand data, and a request process record is stored;
the processor is used for sending the data request to the supplier client through the second data communication interface so as to call demand data according to information corresponding to the demand data when the supplier client determines that the data request is legal according to the intelligent contract and the supplier identification information; encrypting and feeding back the required data by using the public key;
the second data communication interface is also used for receiving the encrypted demand data and feeding the encrypted demand data back to the processor;
the processor is used for feeding back the encrypted demand data to the client of the demand party through the first data communication interface;
the first data communication interface is specifically used for receiving a data request sent by a client of a demand party through a first middle layer;
the second data communication interface is specifically configured to receive the encrypted demand data sent by the supplier client through a second intermediate layer, and feed the encrypted demand data back to the processor;
the information corresponding to the demand data includes at least: key field information and a data request path corresponding to the demand data;
the second data communication interface is specifically configured to send the key field information corresponding to the demand data, the intelligent contract, and the supplier identification information to the supplier client according to the data request path.
2. The data exchange server according to claim 1, wherein when the number of the providers includes at least two, the second data communication interface establishes a bidirectional communication connection with a first provider client of the at least two provider clients, and receives encrypted demand data fed back by the first provider client, where the first provider client is a provider client determined by the at least two provider clients according to a preset protocol, and the first provider client is configured to receive a data request sent by the processor through the second data communication interface and distribute the data request to each of the at least two provider clients; and the system is also used for receiving the sub-demand data fed back by each supplier client according to the data request, summarizing all the sub-demand data to form demand data, and feeding back the demand data to the processor through the second data communication interface after encrypting the demand data.
3. The data exchange server of claim 1, wherein when the providers comprise at least two providers, the second data communication interface establishes a bidirectional communication connection with each provider client respectively;
the processor sends a data request to each supplier client through the second data communication interface respectively;
the second data communication interface is further used for respectively receiving the encrypted demand sub-demand data fed back by each supplier client and feeding back the encrypted demand sub-demand data to the processor.
4. A data transmission system based on a blockchain, the data transmission system comprising: a requiring side client, a supplying side client and a data exchange server according to any one of claims 1-3;
the demand side client is used for inquiring and obtaining information corresponding to demand data, an intelligent contract and supplier identification information from a data directory mounted on a block chain, and writing a public key of the demand side into the intelligent contract;
after the information corresponding to the demand data, the intelligent contract and the supplier identification information form a data request, sending the data request to a data exchange server;
the supplier client is used for verifying the validity of the data request according to the supplier identification information and the intelligent contract;
when the data request is legal, calling the demand data according to the information corresponding to the demand data; and encrypting the required data by using the public key and feeding the encrypted required data back to the data exchange server.
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| CN110442632A (en) * | 2019-08-09 | 2019-11-12 | 泰康保险集团股份有限公司 | Data processing method and device |
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