WO2022145679A1

WO2022145679A1 - Blockchain-based safe and reliable data transaction method, and data transaction platform providing system

Info

Publication number: WO2022145679A1
Application number: PCT/KR2021/015762
Authority: WO
Inventors: 인호; 멜렉 므왐바음퍄나
Original assignee: 고려대학교 산학협력단
Priority date: 2020-12-30
Filing date: 2021-11-03
Publication date: 2022-07-07
Also published as: KR20220095957A; KR102540415B1

Abstract

A data transaction platform providing system comprises: a secure communication unit for communication between first user equipment of a data provider, second user equipment of a consumer and a blockchain network; a transaction management unit for receiving a data proposal from the first user equipment via the secure communication unit, receiving a purchase order of the data proposal from the second user equipment of the consumer, and processing the payment of the consumer for the purchase order; and a distributed ledger technology unit for generating contract information which is defined by means of the accounts of the data provider and consumer and is recorded and executed in a distributed ledger in the blockchain network, in accordance with the purchase order and payment processing. The transaction management unit can transmit to the consumer the data or data processing information corresponding to the data proposal purchased by the consumer, or impart to the consumer an access authorization for the data or data processing information. By using the data transaction platform providing system, the data provider and consumer can sell or purchase data in a safe and reliable environment provided by the platform without having to rely on a reliable third party and the like.

Description

Blockchain-based safe and reliable data transaction method and data transaction platform providing system

Embodiments relate to a system for providing a data transaction platform based on a blockchain, a data transaction method, and a computer program for the same. More specifically, the embodiments relate to a technology that enables profit creation through data in a safe and reliable environment by applying blockchain technology to the data trading market and data-based digital economy.

As the transition to an information society is rapidly taking place, a data-based digital economy in which not only existing real products or services but also data itself are subject to transaction is being activated. A company can purchase raw data such as observation or measurement value, processed data, and a database that systematically produces, collects, and accumulates it through a data exchange and uses it for service development and data analysis of the company. As an example, Korean Patent Publication No. 10-2016-0127920 discloses a big data transaction system and method.

However, in the conventional data trading system, since trust in the platform and the trading parties is not guaranteed, it is difficult to trust the execution according to the data purchase and it is difficult to handle disputes between the trading parties. In addition, since the conventional data trading system has a centralized structure and the administrator has all the power and authority, the data trading system can be a target of a single point attack, and the data provider has a history of selling their digital assets or data. There is a problem in that it is not easy to check the sales price or the like.

Furthermore, in the conventional data trading system, since it is not possible to track transactions or verify the actions of each transaction party, fairness in revenue distribution cannot be corrected, and the data provider's revenue is lowered depending on the presence or number of data intermediaries. Despite this, there is a limitation in that it cannot provide a trading market in which buyers and sellers can directly transact. In addition, the conventional data transaction system did not provide a transaction method capable of protecting the personal information of the transaction parties while enabling a secure transaction.

[Prior art literature]

[Patent Literature]

(Patent Document 1) Patent Publication No. 10-2016-0127920

According to one aspect of the present invention, by providing a blockchain-based safe and reliable data transaction platform, data providers and consumers directly sell data without having to rely on a trusted third party, etc. It is possible to provide a system for providing a data transaction platform that can be purchased, a data transaction method, and a computer program for the same.

A data transaction platform providing system according to an aspect of the present invention includes: a secure communication unit configured to communicate with a first user device of a data provider, a second user device of a consumer, and a blockchain network; a transaction configured to receive, through the secure communication unit, a data offer from the first user device, receive a purchase order for the data offer from the second user device, and perform payment processing of the consumer for the purchase order Management; and a distributed ledger descriptor configured to generate contract information defined using the accounts of the data provider and the consumer and recorded and executed in the distributed ledger on the blockchain network, corresponding to the purchase order and payment processing.

The transaction management unit may be further configured to transmit data or data processing information corresponding to the data proposal purchased by the consumer to the consumer, or to grant access to the data or the data processing information to the consumer .

In an embodiment, the secure communication unit is further configured to, in response to receiving a negotiation request from the first user device or the second user device, create a private communication channel between the data provider and the consumer.

The data transaction platform providing system according to an embodiment further comprises a data processing unit configured to provide, to the consumer, sample data corresponding to the data proposal ordered by the consumer, in response to the consumer's payment processing being performed .

In an embodiment, the transaction management unit is further configured to receive an order confirmation request from the consumer after the sample data is provided to the consumer. In this case, the contract information may be defined to pay a sales profit corresponding to the payment amount to the account of the data provider in response to the order confirmation request being received. Also, in one embodiment, the contract information may be defined to return the payment amount to the consumer's account when the order request is canceled by the consumer or the order confirmation request is not received from the consumer.

According to an aspect of the present invention, there is provided a data transaction method comprising: receiving, by a data transaction platform providing system, a purchase order of the consumer for the data offer of the data provider by communicating with the user device of the consumer; performing, by the data transaction platform providing system, payment processing of the consumer for the purchase order by communicating with the user device of the consumer; generating, by the data transaction platform providing system, contract information that is defined using the accounts of the data provider and the consumer and is recorded and executed in a distributed ledger on a blockchain network, in response to the purchase order and payment processing; and providing, by the data transaction platform providing system, data or data processing information corresponding to the data proposal purchased by the consumer to the consumer.

A data transaction method according to an embodiment may include, before receiving the purchase order of the consumer, the data transaction platform providing system comprising: receiving, by the data transaction platform, a negotiation request related to the data proposal from the data provider or the consumer; and creating, by the data transaction platform providing system, a private communication channel between the data provider and the consumer in response to the negotiation request being received.

The data transaction method according to an embodiment includes, in response to the consumer's payment processing being performed, providing, by the data transaction platform providing system, sample data corresponding to the data proposal ordered by the consumer to the consumer further includes

The data transaction method according to an embodiment further includes, by the data transaction platform providing system, receiving an order confirmation request from the consumer after the sample data is provided to the consumer. In this case, the contract information may be defined to pay a sales profit corresponding to the payment amount to the account of the data provider in response to the order confirmation request being received.

The computer program according to an aspect of the present invention is combined with hardware to execute the data transaction method according to the above-described embodiments, and may be stored in a computer-readable recording medium.

According to the data transaction platform providing system and data transaction method according to an aspect of the present invention, by applying blockchain technology to the data transaction market and data-based digital economy, safe and reliable data providers and consumers can It can enable data trading and monetization through data in the environment.

According to the data transaction platform providing system and data transaction method according to an aspect of the present invention, there is an advantage in that a transparent and safe transaction ecosystem can be constructed by matching the needs of a data provider and a consumer through a smart contract.

In addition, the data transaction platform providing system and data transaction method according to an aspect of the present invention are applied to various domains such as financial information assets, health information assets, Internet of Things (IoT), artificial intelligence such as machine learning and deep learning. It can be applied, and furthermore, it can be used for various purposes such as modeling of formal specifications for data and testing the versatility of data verification technology.

1 is a conceptual diagram illustrating a transaction environment through a data transaction platform providing system according to an embodiment.

2 is a block diagram illustrating a system architecture of a system for providing a data transaction platform according to an embodiment.

3 is a flowchart illustrating each step of a process of generating a data proposal in a data transaction method according to an embodiment.

4 is a flowchart illustrating each step of a process in which a consumer purchases data in a data transaction method according to an embodiment.

5 is a flowchart illustrating each step of a refund process when a consumer cancels a data purchase in a data transaction method according to an embodiment.

6 is a flowchart illustrating each step of a process in which a consumer purchases data in a data transaction method according to another embodiment.

7 is a flowchart illustrating each step of a process in which a consumer purchases data in a data transaction method according to another embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1 , a data transaction platform providing system 3 according to the present embodiment is configured to be able to communicate with a user device 1 of a data provider and a user device 2 of a consumer through a wired and/or wireless network. . Furthermore, the data trading platform providing system 3 may be configured to further communicate with the communication service server 5 . In the present specification, a communication method through a wired and/or wireless network may include any communication method capable of networking an object and an object, and is not limited to wired communication, wireless communication, 3G, 4G, or other methods. .

For example, wired and/or wireless networks include Local Area Network (LAN), Metropolitan Area Network (MAN), Global System for Mobile Network (GSM), Enhanced Data GSM Environment (EDGE), High Speed Downlink Packet Access (HSDPA) , W-CDMA (Wideband Code Division Multiple Access), CDMA (Code Division Multiple Access), TDMA (Time Division Multiple Access), Bluetooth, Zigbee, Wi-Fi, VoIP (Voice) over Internet Protocol), LTE Advanced, IEEE802.16m, WirelessMAN-Advanced, HSPA+, 3GPP Long Term Evolution (LTE), Mobile WiMAX (IEEE 802.16e), UMB (formerly EV-DO Rev. C), Flash-OFDM, iBurst and MBWA (IEEE 802.20) systems, HIPERMAN, Beam-Division Multiple Access (BDMA), Wi-MAX (World Interoperability for Microwave Access), and ultrasonic-based communication to refer to a communication network by one or more communication methods selected from the group consisting of However, the present invention is not limited thereto.

The data trading platform providing system 3 may receive a data offer from the user device 1 of the data provider and provide it to other users. The consumer searches for data proposals according to his/her preference by accessing the data transaction platform providing system 3 using the user device 2 , and sends an order for the data proposal to the data transaction platform providing system 3 . You can request data. In this specification, data refers to intellectual property information, financial information, health information, Internet of Thing (IoT) information, and artificial intelligence-related information such as machine learning or deep learning in a digitalized form regardless of the type and form. It refers to any information that can be transmitted and received, and is not limited to a specific domain.

In an embodiment, before the consumer places an order, a negotiation may be conducted through a private communication channel created between the data provider and the consumer. Such a private communication channel may be created at the request of a data provider or consumer, and may be made through the data transaction platform providing system 3 or a separate communication service server 5 .

For the above operation, the data transaction platform providing system 3 according to the embodiments provides a predetermined web page accessible through a web browser executed on the

user devices

1 and 2, etc. It is implemented in the form of a web server to provide a data transaction platform through a web page. Alternatively, the data trading platform providing system 3 may provide a data trading platform through a dedicated application (or app) executed on the

user devices

1 and 2, in which case the data trading platform is provided The system 3 may correspond to an application service server that enables the execution of the function of the application.

Although the

user devices

1 and 2 of the data provider and the consumer in FIG. 1 are illustrated in the form of a notebook computer, this is exemplary, and the

user devices

1 and 2 of users using the data transaction platform providing system 3 according to embodiments 1 and 2) are set-top boxes for mobile communication terminals such as smartphones, personal computers, notebook computers, personal digital assistants (PDAs), tablets, Internet Protocol Television (IPTV), etc. -top box), etc., may be implemented in the form of any computing device, and is not limited to a specific type of device.

The data transaction platform providing system 3 receiving the consumer's order may perform payment processing for the order through communication with the user device 2 . In addition, the data trading platform providing system 3 may generate contract information corresponding to the order and payment details. In this case, the contract information is recorded and executed in a distributed ledger implemented by each node 40 of the blockchain network 4 composed of a plurality of nodes 40 sharing and synchronizing a database. For example, the contract information may be a smart contract 300 involving a transaction recorded and executed using a block chain 410 made of interconnected data blocks 400 .

When the consumer pays for the order, the transfer of the price paid by the consumer is bound by the contract information. At this time, the price paid by the consumer may consist of a data fee corresponding to the price of the data ordered by the consumer and a service brokerage fee paid by the consumer to the operator of the data transaction platform providing system 3 , but is not limited thereto. , data trading is also possible with no data fees and/or service brokerage fees.

In one embodiment, the data provider may receive notification information about the data order from the data trading platform providing system 3 . In addition, after the data provider is notified of the order, before sending all data corresponding to the data proposal, the data provider may first transmit sample data for confirmation of the consumer to the consumer. The above transmission process is made through the data transaction platform providing system 3, through direct communication between the user device 2 of the data provider and the user device 1 of the consumer, or provided by the communication service server 5 This can be done through a communication channel between the data provider and the consumer.

In an embodiment, some or all of the data provided by the data provider is stored using the distributed storage network 6, and the data may be traded in a manner that grants access to the data to a consumer who has purchased the data. have. To this end, the data transaction platform providing system 3 may be communicatively connected to the distributed storage network 6 . The distributed storage network 6 may refer to a distributed file system, a decentralized cloud storage, and the like, but is not limited thereto.

The consumer who has received the sample data may check whether the sample data matches his/her preference. After the confirmation process, the consumer may transmit an order confirmation request for confirming the order for the data proposal to the data transaction platform providing system 3 . Alternatively, if the sample data does not match the consumer's preference as a result of checking the sample data, the consumer requests the data trading platform providing system 3 to cancel the order, or by not making a request for order confirmation for a preset period. The order may be automatically canceled by the trading platform providing system 3 .

The data provider may provide the ordered data to the consumer after receiving the order confirmation message from the consumer. In this specification, the provision of ordered data may mean transmitting data to the user device 1 of the consumer, or the consumer for the data provided to the data transaction platform providing system 3 or the distributed storage network 6 . It may mean granting access to In addition, at this time, the data transmitted to the consumer or the user's access is granted may be raw data that meets specific conditions, or processed data based on the source data and 2 systematically produced, collected, and accumulated data. It may be data processing information such as car data.

In the data transaction platform providing system 3, after receiving the order confirmation request from the consumer, the sales profit corresponding to the payment amount of the consumer can be automatically paid to the data provider. In this case, the sales profit may correspond to a data fee among the amount paid by the consumer, or may be an amount obtained by deducting the service brokerage fee of the data transaction platform providing system 3 from the data fee.

In embodiments, the process in which the data trading platform providing system 3 pays the sales profit to the data provider is automatically executed as contract information generated according to the order and payment details is fulfilled when the execution condition is satisfied. This can be done using the seller's account included in the transaction recorded on the distributed ledger. For example, in the present specification, the payment of the consumer's payment and the payment of the sales revenue to the data provider may be performed using a token whose transaction details are recorded in the distributed ledger on the block chain network 4, but in this It is not limited.

On the other hand, if the consumer cancels the order or does not transmit an order confirmation request for a preset period, the contract information is defined so that the data transaction platform providing system 3 automatically returns the consumer's payment amount to the consumer's account. it might be

Referring to FIG. 2 , the data transaction platform providing system 3 according to the present embodiment includes a secure communication unit 302 , a distributed ledger description unit 303 , and a transaction management unit 307 . In one embodiment, the data trading platform providing system 3 further includes a user management unit 305 . Also in one embodiment, the data trading platform providing system 3 further includes a data processing unit 306 and a distributed data storage unit 304 . Also, in one embodiment, the data transaction platform providing system 3 further includes a service providing unit 301 , a data input/output unit 308 , and/or a data setting and search unit 309 . Further, in an embodiment, the data transaction platform providing system 3 further includes a security management unit 310 and/or a data protection unit 311 .

The data trading platform providing system 3 according to the embodiments may be entirely hardware, or may have aspects that are partly hardware and partly software. For example, the data transaction platform providing system 3 and each server or unit included therein may collectively refer to hardware and related software for processing and/or sending and receiving data in a specific format and content in an electronic communication method. have. As used herein, terms such as “unit”, “module”, “device”, “terminal”, “server” or “system” are intended to refer to a combination of hardware and software driven by the hardware. For example, the hardware may be a data processing device including a CPU or other processor. In addition, software driven by hardware may refer to a running process, an object, an executable file, a thread of execution, a program, and the like.

Each of the parts 301-311 constituting the data trading platform providing system 3 is not necessarily intended to refer to separate devices physically separated from each other. That is, each unit 301-311 of FIG. 1 is only functionally classified according to the operation performed by the hardware constituting the data transaction platform providing system 3, and each unit is necessarily independent of each other. It does not have to be provided as a device of Of course, depending on the embodiment, at least one of the respective units 301-311 may be implemented as separate devices physically separated from each other.

The secure communication unit 302 is a part corresponding to a secure communication layer in the architecture of the data transaction platform providing system 3, user devices of data providers and consumers, a block chain network, and, if necessary, an external communication service server, etc. It is a part for performing data communication. The operation of each other unit of the data transaction platform providing system 3 may be implemented using a communication function provided by the secure communication unit 302 . For example, the secure communication unit 302 may be based on a known Internet architecture such as SCION (Scalability, Control, and Isolation On Next-generation networks), but is not limited thereto.

The service providing unit 301 is a part corresponding to the integration layer in the architecture of the data trading platform providing system 3 , and serves to execute various services related to the user interface of the data trading platform providing system 3 . For example, the service providing unit 301 includes various application programming interfaces related to data import and export, execution of decentralized applications (DApps) through blockchain networks, access to distributed ledger records, and development environments; API) and can be configured to respond to requests from users through the API.

The user management unit 305 may process a membership registration procedure for data providers and consumers who want to use the data transaction platform providing system 3 . Also, the user management unit 305 may receive payment method information from a user who wants to join as a member. The payment method information is intended to be used for payment processing for a user to purchase data through the data transaction platform providing system 3, and includes electronic wallet (account) information of a token managed on a blockchain network, and/or It may include information about a card or account for payment of real money.

The data input/output unit 308 may perform functions such as collecting data from a data provider and exporting data to a consumer who has purchased data. In addition, the data setting and search unit 309 functions to allow a consumer who is a potential purchaser of data to read or search the data to be purchased by setting a desired search condition. The above operations of the data input/output unit 308 and the data setting and search unit 309 may be implemented through a user interface provided by the service providing unit 301 and a communication function by the secure communication unit 302 .

The security management unit 310 and the data protection unit 311 are configured to prevent unauthorized users from accessing the data provided by the data transaction platform providing system 3, data by digital rights management and trust level management, etc. It may have a protective function. When the user accesses data, the security management unit 310 may achieve data security and user's personal information protection by performing user authentication through preset authentication information. In addition, the data protection unit 311 may prevent data leakage to an unauthorized user through decryption of data using authentication information or management of rights for data.

The transaction management unit 307 may receive the data proposal from the data provider and register it in the data transaction platform providing system 3 so that other users can inquire it. In addition, the transaction management unit 307 may receive a purchase order for the data proposal from the consumer, and may perform payment processing for the purchase order. In addition, the transaction management unit 307 may allow data or data processing information according to a data proposal purchased by the consumer to be transmitted to the consumer or to be granted access to the data or data processing information to the consumer.

In one embodiment, some or all of the data provided by the data provider is stored in the distributed data storage unit 304 of the data transaction platform providing system 3, and granting access to the data to the consumer who purchased it. Data may be traded in this way. In this case, the distributed data storage unit 304 may store data provided by the data provider in a distributed storage method. For example, the distributed data storage unit 304 may distribute and store data using a distributed file system, a decentralized cloud storage, or the like. However, this is exemplary, and in another embodiment, the distributed data storage unit 304 may store the data itself in a centralized data storage and distribute and store only the storage location information.

Meanwhile, in another embodiment, the data transmission between the data provider and the consumer may be performed directly between users or through a private communication channel between users. In this case, the distributed data storage unit 304 of the data transaction platform providing system 3 is may be omitted.

The distributed ledger description unit 303 generates contract information corresponding to the data order and payment details in response to the consumer placing a purchase order and paying for the data proposal. In this case, the contract information may be a smart contract 300 accompanied by a transaction defined using the accounts of the data provider and the consumer, and may be recorded in the distributed ledger on the block chain network.

In one embodiment, the data trading platform providing system 3 includes a data processing unit 306, which uses data uploaded by the data provider as source data and converts it into various processed data required for data trading. can function. For example, the data processing unit 306 may generate sample data through which the consumer can check a part of the corresponding data in response to the data proposal of the data provider, and transmit it to the consumer. In addition, the data processing unit 306 performs verification, analysis, matching, ranking, filtering, statistical processing, etc. on the data using the analysis model algorithm stored in advance in the data provided by the data provider. It can also function to process the results in the form of secondary data or reports.

Referring to FIG. 3 , the data provider 100 who wants to use the data trading platform providing system 3 may perform a process such as user registration and authentication for the data trading platform providing system 3 ( S101 ). Although not shown in the drawings, in the operation performed between the user and the data transaction platform providing system 3 , the data provider 100 or the like accesses the data transaction platform providing system 3 using the user device 1 ( FIG. 1 ). It will be readily understood by those skilled in the art that it is performed by

The data provider 100, who has logged into the data trading platform providing system 3 using the authentication information, generates a data proposal including an overview of the data that the person intends to sell through the data trading platform providing system 3 ( S102), it may be transmitted to the data transaction platform providing system 3 (S103). The data proposal may include information on the quantity, type, data format, and/or price of data provided by the data provider 100 , wherein the provided data is the source data itself or secondary data processed by the source data It may be data processing information such as

In an embodiment, the data trading platform providing system 3 may perform verification of the data proposal provided by the data provider 100 ( S104 ). The verification process refers to a process of checking whether the data proposal conforms to the formal specification of a transaction sold through the data trading platform providing system 3 based on the outline included in the data proposal.

If there is an abnormality in the data proposal as a result of the verification, the data trading platform providing system 3 requests the data provider 100 to update the proposal (S105), and when the updated proposal from the data provider 100 is uploaded again (S106) ), verification of the updated proposal may be performed again (S107). However, this is an example, and if the verification of the initial proposal is successful, the steps S105 to S107 may not be necessary. If the verification of the data proposal or the updated data proposal is successful, the data transaction platform providing system 3 may transmit a notification that the verification of the data proposal is completed to the data provider 100 ( S108 ).

Afterwards, when the data provider 100 requests registration for the verified data proposal ( S109 ), the data trading platform providing system 3 registers the data proposal with the data trading platform providing system 3 to provide data to other users It is possible to publish data proposals from the provider 100 . This may mean enabling inquiry and viewing of data proposals by posting data proposals on a data exchange web page provided by the data trading platform providing system 3 .

Referring to FIG. 4 , a consumer 200 using the data trading platform providing system 3 accesses the data exchange provided by the data trading platform providing system 3 and searches for data proposals that fit their purposes and preferences. It can proceed (S201). The search process is performed in such a way as to browse data suggestions registered in the data trading platform providing system 3, or search data suggestions registered in the data trading platform providing system 3 by a search condition in which one or more fields are specified. can be

When the consumer 200 finds a data proposal that meets his or her needs, the consumer 200 may transmit a purchase order to the data transaction platform providing system 3 ( S202 ). In one embodiment, the data trading platform providing system 3 transmits the purchase order of the consumer 200 to the data provider 100 of the data proposal (S203), and receives approval for the purchase order from the data provider 100 It is possible to proceed with the order procedure (S03). In the process of approving the purchase order, the data provider 100 may approve or reject approval based on the information of the consumer, or adjust the sales amount of data, etc. FIG.

However, this is an example, and in another embodiment, when there is a purchase order from the consumer 200, the data transaction platform providing system 3 does not seek separate approval from the data provider 100, and the transaction registered in advance through the data proposal. Depending on the conditions, we may proceed with the ordering process.

Next, the data transaction platform providing system 3 may request the consumer 200 to pay for the data proposal ordered by the consumer 200 ( S405 ), and the consumer responds to the request by the data transaction platform providing system Payment processing for (3) may be performed (S406). Payment processing is a method in which the data transaction platform providing system 3 includes a payment module that communicates the payment module with a financial institution server or a payment agency (VAN company) server, and calls the payment module according to the payment request of the consumer 200. However, the present invention is not limited thereto. For example, after the data transaction platform providing system 3 notifies the consumer 200 of account information, etc., the consumer 200 may directly make a payment or transfer.

In one embodiment, the data transaction platform providing system 3 notifies the data provider 100 of the fact that data has been sold by transmitting a notification to the data provider 100 when the payment processing of the consumer 200 is completed. You may.

When the purchase order and payment processing is completed, the data transaction platform providing system 3 may generate contract information recorded on the block chain network corresponding to the purchase and payment details for the corresponding data proposal (S407). At this time, the generated contract information may be, for example, a smart contract defined including a transaction between the account of the consumer 200 (eg, electronic wallet address) and the account of the data provider 100, and the smart contract is distributed on the blockchain network. By calling a code that is recorded in the ledger and defined in advance, it can be automatically executed (self-execution) by checking the state change and creating a state change transaction when a state change occurs according to a condition.

Meanwhile, the data provider 100 may transmit data to the consumer 200 in response to the data proposal ordered and paid by the consumer 200 ( S208 ). In one embodiment, the data transmitted at this time may be sample data corresponding to the data proposal ordered by the consumer 200 . Also, at this time, a primary key (PK) for the consumer 200 to confirm the sample data may be transmitted together. The sample data may be provided by the data provider 100 or generated by the data trading platform providing system 3 randomly or according to a predetermined rule to extract some of the data based on the data uploaded by the data provider 100. can

After receiving the sample data, the consumer 200 may check whether the data matches his/her preference, and if the data matches the preference, may request the data transaction platform providing system 3 to confirm an order (S209). When the order is confirmed by the request of the consumer 200 , the data provider 100 may transmit the entire ordered data to the consumer 200 . Meanwhile, the data transaction platform providing system 3 may pay the data provider 100 a portion corresponding to the sales revenue of the data provider 100 among the amounts paid by the consumer 200 . Since the above payment process is performed by automatically executing the state change transaction by the smart contract created in step S207 described above, the data provider 100 and the consumer 200 can trade data in a safe and reliable environment.

In addition, after the sales revenue is paid to the data provider 100, the data provider 100 issues a receipt and sends the receipt to the consumer 200, reviews each transaction party's order, and the data transaction platform providing system 3 ), such as storing order details, may be performed. Since this process can be easily understood by those skilled in the art from known electronic commerce processes, detailed descriptions are omitted to clarify the gist of the present invention.

5 is a flowchart illustrating each step of a refund process when a consumer cancels a data purchase in a data transaction method according to an embodiment. Steps S201 to S208 of the embodiment shown in FIG. 5 are the same as each step of the embodiment described above with reference to FIG. 4 , and thus detailed description thereof will be omitted.

Meanwhile, in the present embodiment, after receiving the sample data, the consumer 200 may request the data transaction platform providing system 3 to cancel the order if the sample data does not match his/her preference ( S211 ). Alternatively, even if there is no separate request from the consumer 200, the data transaction platform providing system 3 may automatically determine that the order is unconfirmed if there is no order confirmation request for a predetermined time, for example, according to a preset condition ( S212).

* When the order is canceled or unconfirmed, the data transaction platform providing system 3 returns the amount paid by the consumer 200 back to the consumer 200 account (S213). The above return process is also performed by automatically executing the state change transaction by the smart contract created in step S207, so the consumer 200 can safely receive the payment amount if he or she does not confirm the order, so it is safe and reliable You can perform data purchases in the environment.

6 is a flowchart illustrating each step of a process in which a consumer purchases data in a data transaction method according to another embodiment, wherein the consumer purchases data stored in the data transaction platform providing system rather than directly receiving data from the data provider. indicates the case. Steps S301 to S307 of the embodiment shown in FIG. 6 are the same as steps S201 to S207 of the embodiment described above with reference to FIG. 4, respectively, and thus detailed description thereof will be omitted to avoid duplication of description.

In this embodiment, the data provider 100 may request the data transaction platform providing system 3 for permission to access the data of the consumer 200 in response to the data proposal ordered and paid by the consumer 200 (S308) -One). In response to this, the data trading platform providing system 3 may grant the consumer 200 access to the data stored in the data trading platform providing system 3 (S308-2), which is, for example, the data trading platform providing system It may mean transmitting authentication information for access to the corresponding data stored in (3) to the consumer 200 .

In one embodiment, the data to which the consumer 200 is granted access through the steps S308-1 and S308-2 is sample data rather than a premise of the data purchased by the consumer 200, and the entire data is the consumer ( 200) may be provided to allow access of the consumer 200 after confirming the order.

The consumer may check the data for which access is permitted from the data transaction platform providing system 3 , and if the data matches his/her preference, he/she may request the data transaction platform providing system 3 to confirm an order ( S309 ). In the data transaction platform providing system 3, a portion corresponding to the sales revenue of the data provider 100 among the payment amount of the consumer 200 may be paid to the account of the data provider 100 according to the confirmed order ( S310).

7 is a flowchart illustrating each step of a process in which a consumer purchases data in a data transaction method according to another embodiment, and illustrates a case in which the consumer purchases processing information for data rather than data itself. Steps S401 to S407 of the embodiment shown in FIG. 7 are the same as steps S201 to S207 of the embodiment described above with reference to FIG. 4 , respectively, and thus detailed description thereof will be omitted to avoid duplication of description.

In this embodiment, the data provider 100 may request the data transaction platform providing system 3 for permission to access the data of the consumer 200 in response to the data proposal ordered and paid by the consumer 200 (S408) -One). In response to this, the data trading platform providing system 3 may grant the consumer 200 access to the data stored in the data trading platform providing system 3 (S408-2). In this embodiment, this may mean granting the account of the consumer 200 an authority to execute a processing function for the corresponding data stored in the data transaction platform providing system 3 .

The consumer 200 may request the data transaction platform providing system 3 to execute a data processing function based on the authority granted to it (S409). The data transaction platform providing system 3 executes a processing function such as an analysis model algorithm for the data transaction platform providing system 3 according to the request of the consumer 200 (S410), and provides the processing result such as a data analysis report to the consumer It can be transmitted to (200) (S411-1). To this end, the data trading platform providing system 3 may store a library and a function module for executing an analysis algorithm for the data stored therein.

In one embodiment, the fact that the data processing function is executed according to the request of the consumer 200 may also be notified to the data provider 100 who sold the data (S411-2).

In one embodiment, the processing information that the consumer 200 can check through the steps (S409 to S411-1) is not the entire data requested by the consumer 200 to purchase, but sample data processed only some of the data, The processing information for the entire data may be provided to the consumer 200 after the consumer 200 confirms the order.

The consumer may request the data transaction platform providing system 3 to confirm an order when the corresponding data meets his or her preference through the processing information provided from the data transaction platform providing system 3 ( S412 ). In the data transaction platform providing system 3, a portion corresponding to the sales revenue of the data provider 100 among the payment amount of the consumer 200 may be paid to the account of the data provider 100 according to the confirmed order ( S413).

In the embodiment shown in FIGS. 6 and 7 , the case where the consumer 200 confirms the order and the sales revenue is paid to the data provider 100 have been described. ) will be easily understood by those skilled in the art that the refund procedure in case the order is canceled or the order is not confirmed may also be applied to the embodiments of FIGS. 6 and 7 .

The operation by the data transaction method according to the above-described embodiments may be at least partially implemented as a computer program and recorded in a computer-readable recording medium. A computer-readable recording medium in which a program for implementing an operation by the data transaction method according to the embodiments is recorded and includes all types of recording devices in which computer-readable data is stored. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, and optical data storage device. In addition, the computer-readable recording medium may be distributed in a network-connected computer system, and the computer-readable code may be stored and executed in a distributed manner. In addition, functional programs, codes, and code segments for implementing the present embodiment may be easily understood by those skilled in the art to which the present embodiment belongs.

Although the present invention as described above has been described with reference to the embodiments shown in the drawings, it will be understood that these are merely exemplary and that various modifications and variations of the embodiments are possible therefrom by those of ordinary skill in the art. However, such modifications should be considered to be within the technical protection scope of the present invention. Accordingly, the true technical protection scope of the present invention should be defined by the technical spirit of the appended claims.

Claims

a secure communication unit configured to communicate with the first user device of the data provider, the second user device of the consumer, and the blockchain network;

a transaction configured to receive, through the secure communication unit, a data offer from the first user device, receive a purchase order for the data offer from the second user device, and perform payment processing of the consumer for the purchase order Management; and

a distributed ledger descriptor configured to generate contract information defined using the accounts of the data provider and the consumer and recorded and executed in the distributed ledger on the blockchain network, corresponding to the purchase order and payment processing;

The transaction management unit, a data transaction platform further configured to transmit data or data processing information corresponding to the data proposal purchased by the consumer to the consumer, or to grant access to the data or the data processing information to the consumer delivery system.
According to claim 1,

The secure communication unit is further configured to create a private communication channel between the data provider and the consumer in response to receiving a negotiation request from the first user device or the second user device.
According to claim 1,

and a data processing unit configured to provide, to the consumer, sample data corresponding to the data proposal ordered by the consumer, in response to the consumer's payment processing being performed.
4. The method of claim 3,

The transaction management unit is further configured to receive an order confirmation request from the consumer after the sample data is provided to the consumer,

wherein the contract information is defined to pay a sales profit corresponding to the payment amount to an account of the data provider in response to the order confirmation request being received.
4. The method of claim 3,

The contract information is defined to return the payment amount to the consumer's account when the order request is canceled by the consumer or the order confirmation request is not received from the consumer.
receiving, by the data transaction platform providing system, a purchase order of the consumer for the data offer of the data provider by communicating with the user device of the consumer;

performing, by the data transaction platform providing system, payment processing of the consumer for the purchase order by communicating with the user device of the consumer;

generating, by the data transaction platform providing system, contract information that is defined using the accounts of the data provider and the consumer and is recorded and executed in a distributed ledger on a block chain network, in response to the purchase order and payment processing; and

and providing, by the data transaction platform providing system, data or data processing information corresponding to the data proposal purchased by the consumer to the consumer.
7. The method of claim 6,

Before receiving the purchase order of the consumer,

receiving, by the data transaction platform providing system, a negotiation request related to the data proposal from the data provider or the consumer; and

and creating, by the data trading platform providing system, a private communication channel between the data provider and the consumer in response to the negotiation request being received.
7. The method of claim 6,

The data transaction method further comprising the step of providing, by the data transaction platform providing system, sample data corresponding to the data proposal ordered by the consumer to the consumer in response to the consumer's payment processing being performed.
9. The method of claim 8,

The method further comprises, by the data trading platform providing system, receiving an order confirmation request from the consumer after the sample data is provided to the consumer,

wherein the contract information is defined to pay a sales profit corresponding to the payment amount to an account of the data provider in response to the order confirmation request being received.
A computer program stored in a computer-readable recording medium in combination with hardware to execute the data transaction method according to claim 6 .