JP2019133650A - Data transmission/reception method - Google Patents

Abstract

To provide a data transmission/reception method for activating recycling of data.SOLUTION: A first device 1 which provides data autonomously transmits obtained or generated data to a recording device 200. A second device 1 which requests the data transmits purchase transaction information to purchase a token equivalent to an access right to the data to a distributed database network system 101. A processing node of the distributed database network system 101 records the purchase of the token by the second device 1 and the provision of a reward to the first device on the basis of the purchase transaction information, and makes the token belong to a wallet address corresponding to the second device 1. A data processing device makes an inquiry to the distributed database network 101 regarding the presence/absence of the access right of the second device 1 to the data, and when the access right is determined to be present, transmits the data to the second device 1.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a data transmission / reception method that promotes data resourceization.

  With the progress of communication technology and semiconductor technology, an enormous amount of information is transmitted and received over the network and accumulated. The service provider accumulates various data such as user information and service usage history according to the provided service. An approach to find the value of accumulated data and effectively utilize it to make resources (data mining) has been proposed (Patent Document 1, etc.).

Japanese Patent Laying-Open No. 2015-166989

  Data resourceization as disclosed in Patent Document 1 is limited within a business operator that manages the data. However, the data stored by the business operator can be used outside the business field of the business operator, and conversely, other users outside the business operator may find higher value for the data.

  Further, with the recent development and spread of IoT (Internet Of Things) related technology, it is possible to collect a large amount of data from a camera that continuously captures images (videos) and a sensor device that measures and detects information such as temperature and pressure. At present, a large amount of data in IoT is often limited to use by a business operator who manages these data, and it cannot be said that it is sufficient as a resource for data.

  The present disclosure has been made in view of such circumstances, and an object of the present disclosure is to provide a data transmission / reception method that activates data resources.

  The data transmission / reception method of the present disclosure is a data transmission / reception method for transmitting / receiving data between a first device that provides data and a second device that requests the data, wherein the first device includes: The data acquired or generated by the first device is autonomously transmitted to a recording device, and the second device mutually purchases purchase transaction information for purchasing a token corresponding to the access right to the data. A distributed database network system comprising a plurality of processing nodes and storage media that are connected to each other and each perform a predetermined operation, and wherein the plurality of processing nodes perform the operation and are distributed to a plurality of storage media to hold information The processing node of the distributed database network system based on the purchase transaction information. Recording the purchase of the token by the second device, and providing a reward to the first device providing the data, and assigning the token to a wallet address corresponding to the second device; The data request from the second device is received by a data processing device that processes data in the recording device, and the data processing device sends the data to any processing node of the distributed database network system. The processing node of the distributed database network system transmits a second device based on a token belonging to a wallet address corresponding to the second device. To determine whether or not there is an access right to the data. The data processing apparatus transmits the data when it is determined that the access right is present at the processing node to the second device.

  In one aspect of the present disclosure, in a distributed database network called a so-called Blockchain, the purchase of the access right to the data of the device requesting the data and the payment of the reward to the data provider device for the purchase are integrated. Recorded as a transaction. When data is requested, it is possible to confirm whether or not the requesting device has an access right, and a reward is paid to the device that provided the data in response to the data request.

  The data to be transmitted / received is still image or video data obtained from a surveillance camera or the like, still image or video data associated with position information obtained from a moving body such as a photographing drone, and health provided from a wearable device including a sensor Data may be used. Moreover, the driving | running | working data obtained from the vehicle equipment which has arrange | positioned various sensors and is also a mobile body may be sufficient. In addition, it may be life log data that is data such as temperature, humidity, energy, etc. in the residence where the sensor group is arranged.

  In the data transmission / reception method of the present disclosure, the first device transmits location information indicating the location of the data and a hash value derived based on the data to a distributed database network, and The processing node records the location information and the hash value in association with each other, acquires data of a location indicated by the location information, and determines whether the data has been tampered with based on the hash value.

  In one aspect of the present disclosure, a device that provides data transmits a hash value of data and location information of the data to the distributed database network system, and records this in the distributed database network system. Since the hash value is recorded so as not to be falsified, it is possible to confirm whether or not the data has been falsified without recording the original data in the distributed database network system.

  In the data transmission / reception method of the present disclosure, each of the first and second devices includes a storage unit storing a unique secret key, and transmits its own wallet address based on the secret key to the distributed database network system. , The processing node of the distributed database network system stores the wallet addresses of the first and second devices, and the provision of the reward is from the wallet address of the second device to the wallet address of the first device. Is the movement of digital assets.

  In one aspect of the present disclosure, each device has an address based on a secret key, which can be used as a wallet address. The distributed database network system has a high affinity for the distribution of digital assets such as virtual currency, and micropayment for data provision becomes possible by making payment of so-called virtual currency. Digital asset rewards are not limited to virtual currency, but digital assets (electronic currency such as virtual currency, other valuable information, quality certification, (Including certificates such as membership certificates, other access rights, ownership rights, voting rights, etc.).

  In the data transmission / reception method of the present disclosure, the first device includes an imaging unit and provides still image data or video data.

  In one aspect of the present disclosure, data provided by a device is once recorded in a recording device. Data is read from the recording device, and a data request is received by a device that manages the location of each data and the attribute information of each data. As a result, it is not necessary to store a large amount of data in the device that provides the data, and it is easy to keep the recording device secret on the network, so that only the device that has purchased the access right can obtain the data. .

  In one aspect of the present disclosure, the transmitted / received data is still image data or video data, still image or video data provided together with position information, health data including a heartbeat, or vehicle running data, or a combination thereof. But you can. Of course, the data to be distributed is not limited to this, and any digital resource can be targeted. For example, it may be data in the agricultural field, or may be copyrighted data such as articles, photos, and posted texts. Further, it may be credit information data related to asset lending and financial data indicating the transaction status of assets such as legal currency and stock.

  The data transmission / reception method of the present disclosure allows legitimate distribution of data between devices, and the reward to the data provider is automatically executed indefinitely, so that data without human or central equipment intervention Distribution becomes possible.

It is explanatory drawing which shows the outline | summary of the data distribution method of this Embodiment. It is a block diagram which shows the hardware constitutions of the apparatus which comprises a data distribution system. It is a block diagram which shows the hardware constitutions of the apparatus which comprises a data distribution system. It is a block diagram which shows the hardware constitutions of the apparatus which comprises a data distribution system. It is a schematic diagram which shows the result of the device registration to a distributed DB network. It is a sequence diagram which shows an example of the procedure of the data preservation | save process in a data distribution system. It is a schematic diagram which shows the outline | summary of the process of FIG. It is a sequence diagram which shows an example of the procedure of the data preservation | save process in a data distribution system. It is a figure which shows the data distribution system in Example 1. FIG. It is a figure which shows the example of a process in the case of transmitting data directly between devices. It is a figure which shows the data distribution system in Example 2. FIG. It is a figure which shows the data distribution system in Example 3. FIG. It is a figure which shows the data distribution system in Example 4. FIG. It is a figure which shows the data distribution system in Example 5. FIG. It is a figure which shows the data distribution system in Example 6. FIG. It is a figure which shows the data distribution system in Example 7. FIG.

  Hereinafter, a data distribution method according to the present application will be described with reference to the drawings showing embodiments.

  FIG. 1 is an explanatory diagram showing an outline of the data distribution method of the present embodiment. The data distribution method uses a distributed database network 101, a data distribution system 102, and a data distribution system 100 including a plurality of devices 1 capable of transmitting and receiving information to and from any of the systems 101 and 102.

  In the distributed DB network 101, a plurality of processing devices each having a storage medium and a processor are connected to each other, and a node is constituted by one or a plurality of processing devices, and each node is stored in a storage medium. It is constructed by verifying information. The distributed DB network 101 is a so-called distributed ledger, and may be a block chain, for example.

  The data distribution system 102 includes a storage 200 (recording device) and a data management device 2 for the storage 200. The storage 200 means a collection of data to be provided, and may include a wide variety of distributed storage devices. The management device 2 holds the correspondence between the data storage locations and the data attributes, and reads out the requested information and transmits the data to the request source. The storage 200 stores various data using a rewritable storage medium such as a hard disk or SSD (Solid State Drive) and a communication interface. The storage 200 is preferably made redundant by storing data in a plurality of storage devices. The storage 200 itself may be configured by a distributed DB network.

  Each of the plurality of devices 1 is a communication device having a secret key itself or a wallet address based on the secret key. Any device can be used as the device 1 as long as it has a wallet address and can communicate with the distributed DB network 101 and the management device 2 via the network N. In the data distribution method according to the present disclosure, each of the plurality of devices 1 is a data provider or a data user. The device 1 serving as a data provider is an apparatus including a camera, a sensor, a switch, and the like, for example. The device 1 serving as a data user is, for example, a communication terminal device used by a human user. The device 1 may not be the property of the user, but may be a terminal device that is temporarily occupied. The device 1 serving as a user may be a device connected to a control object such as a switch or an actuator. The same device 1 can be a user or a provider.

  The data distribution system 100 includes a network N. The network N includes a so-called Internet public communication network, a carrier network provided by a carrier, a wireless communication network, and the like. Each node (processing device 3 constituting the node) in the distributed DB network 101 may transmit / receive data to / from each other via the network N, or may directly transmit / receive data. Each device 1 transmits and receives data to and from the data distribution system 102 via the network N. Data communication between the device 1 and each device is executed safely by encryption processing or the like.

  In the data distribution method according to the present embodiment, the device 1 serving as the data provider stores the data obtained by its own operation in the storage 200. The device 1 serving as the provider transmits the transaction information associated with its own address to the distributed DB network 101 using the registration of the data stored in the storage 200 as a transaction. The transaction information for data registration includes the location of the data and the hash value of the data. In the distributed DB network 101, a data registration transaction is processed and recorded, and the location of data and whether or not the data has been tampered with can be confirmed from any node.

  The device 1 serving as a data user requests data from the data distribution system 102, but transmits in advance token purchase transaction information for purchasing the data access right as a token to the distributed DB network 101. The distributed DB network 101 processes a token purchase transaction. In this transaction, the token (access right) for the specified data to the device 1 of the user and the payment (transfer) of the token (for example, virtual currency) as a reward between the devices 1 cannot be divided. Included.

  The device 1 as a user requests desired data from the management device 2 of the data distribution system 102 based on the token (guaranteed access right) given from the distributed DB network 101. The data distribution system 102 inquires of the distributed DB network 101 whether or not the token presented from the device 1 is valid, and if it is valid, acquires the requested data from the storage 200. It transmits to the device 1 which is a user.

  As a result, the necessary data is exchanged autonomously between the devices 1, and the payment of the reward from the wallet of the device 1 as a user to the wallet of the device 1 as a provider is realized. At this time, for the transaction processing in the distributed DB network 101, a reward is also generated for the node to which it belongs.

  In the above description, the access in the data access right is simply described as the right to transmit the data obtained by the device 1 as the provider to the device 1 as the user. Of course, it is not limited. Transmission can also include both downloading to store the data itself in the user's device 1 and streaming only to temporarily store the data. The access to data is not limited to transmitting the data obtained by the provider's device 1 as it is without processing the data. The access right is text data indicating a result of recognizing an object photographed in the video data from other data derived based on the data obtained by the device 1 as a provider, for example, video data, a numerical value It may be a right to obtain data by the device 1 that is a user after conversion to data. Furthermore, it is good also as the right to control the device 1 used as a provider from the device 1 used as a user.

  In the above description, in the data distribution system 100, data from the device 1 that provides data is temporarily stored in the storage 200, and acquisition of data from the storage 200 requires a request to the management apparatus 2. In this sense, the data in the storage 200 is concealed so that it cannot be freely acquired from any device 1. When the device 1 that provides data has a storage capacity that can be stored sufficiently while concealing the data, the data can be directly transmitted and received between the devices 1. In addition, if the technology that can conceal the data stored in the storage 200 without being freely acquired from any node in the distributed DB network 101 is applicable, the data distribution system 102 itself is also distributed. It may be configured in the type DB network 101.

  A configuration for realizing the data distribution system 100 as described above will be described below. 2 to 4 are block diagrams showing the hardware configuration of the devices constituting the data distribution system 100. FIG.

  FIG. 2 is a block diagram showing a hardware configuration of the device 1 that constitutes the data distribution system 100. The device 1 includes at least a processing unit 10, a storage unit 11, and a communication unit 12. As described above, the device 1 is a so-called IoT device including a camera, a sensor, a switch, or the like, or a communication terminal device such as a personal computer, a smartphone, or a tablet terminal, and includes the processing unit 10, the storage unit 11, and the communication In addition to the unit 12, unique hardware is provided. 2A, 2B, 2C, and 2D all show the configuration of the device 1. FIG. The device 1 in FIG. 2A includes a detection unit 13, and the device 1 in FIG. 2B includes an imaging unit 14. The device 1 in FIG. 2C includes a switching unit 15, and the device 1 in FIG. 2D includes a display unit 16 and an operation unit 17.

  The processing unit 10 uses a processor such as a CPU (Central Processing Unit) and a GPU (Graphics Processing Unit), a memory, and the like. The processing unit 10 may be configured as a single hardware (SoC: System On a Chip) in which a processor, a memory, and further a storage unit 11 and a communication unit 12 are integrated. The memory of the processing unit 10 stores the secret key itself, the public key and address based on the secret key, or only one of them. When used as the device 1 using data, the secret key or information based on the secret key may be temporarily stored. When used as the device 1 that provides data, the memory of the processing unit 10 may store a private key that is uniquely owned by each device 1 in a non-rewritable manner (wallet chipping). The processing unit 10 functions as a data provider or a data user in the data distribution system 100 based on the device program 1P stored in the storage unit 11.

  The storage unit 11 uses a flash memory and stores programs and data referred to by the processing unit 10 including the device program 1P. The device program 1P includes one or both of programs for causing the device 1 to function as a data provider or a data user, which will be described later, so that they can be executed independently. The above-described secret key may be stored in the storage unit 11. The storage unit 11 stores a public key and an address based on the secret key.

  The communication unit 12 is a communication module that realizes communication connection to the network N. The communication unit 12 uses a network card, a wireless communication device, or a carrier communication module.

  The detection unit 13 uses a sensor module. The specific configuration of the detection unit 13 varies depending on the type of the device 1. The detection unit 13 appropriately selects various sensors such as a temperature sensor, a humidity sensor, a light receiving sensor, an acceleration sensor, and a gyro sensor, and measures and outputs various physical quantities. The detection unit 13 may detect its own position using the communication unit 12 or the radio wave reception device (GPS (Global Positioning System) or the like).

  The imaging unit 14 outputs a video signal obtained using a camera module. The imaging unit 14 has a built-in volatile memory, and sequentially stores video signals output from the camera module as video data (such as encoding) sequentially. The imaging unit 14 outputs video data from the internal memory in response to an instruction from the processing unit 10.

  The switching unit 15 is a switch that switches the operation of a connected control target (actuator or the like), and makes a transition to one of a plurality of states such as on / off by a control signal from the processing unit 10. The switching unit 15 is also a detection unit that detects the operation state of the control target.

  The display unit 16 uses a display device such as a liquid crystal panel or an organic EL display. The operation unit 17 is an interface that receives user operations, and uses physical buttons, a touch panel device with a built-in display, a speaker, a microphone, and the like. The operation unit 17 may accept an operation on a screen displayed on the display unit 16 with a physical button or a touch panel, recognizes an operation content from an input sound with a microphone, and interacts with a sound output from a speaker. Operations may be accepted in the form.

  FIG. 3 is a block diagram showing a hardware configuration of the processing device 3 that constitutes a node of the distributed DB network 101. The processing devices 3 constituting the nodes of the distributed DB network 101 include a processing unit 30, a storage unit 31, and a communication unit 32, respectively. The processing device 3 may be a server computer, a desktop or laptop personal computer, or a communication terminal device such as a smartphone. Further, as long as the processing device 3 includes at least the processing unit 30 and the communication unit 32, a part or all of the nodes can be configured by a part of the processing unit 30.

  The processing unit 30 uses a processor such as a CPU and a GPU, and a memory. The processing unit 30 may be configured as one piece of hardware in which a processor, a memory, and further a storage unit 31 and a communication unit 32 are integrated. The memory of the processing unit 30 may store a secret key that is uniquely owned by each processing device 3. Then, the processing unit 30 executes each process based on the node program 3P stored in the storage unit 31, and causes the general-purpose computer to function as a node in the distributed DB network 101.

  The storage unit 31 uses a hard disk or a flash memory, and stores programs and data referred to by the processing unit 30 including the node program 3P. The node program 3P includes a program for causing it to function as a smart contract (a processing unit that executes predetermined arithmetic processing for a transaction), which will be described later. The above-described secret key may be stored in the storage unit 31. The storage unit 31 stores a public key and an address based on the secret key.

  The communication unit 32 is a communication module that realizes mutual communication between the processing devices 3. The communication unit 32 uses a network card, an optical communication device, a wireless communication device, or the like.

  FIG. 4 is a block diagram illustrating a hardware configuration of the management apparatus 2. The management device 2 includes a processing unit 20, a storage unit 21, and a communication unit 22 using a server computer. As described above, the management apparatus 2 itself may belong to the distributed DB network 101.

  The processing unit 20 uses a processor such as a CPU and a GPU, and a memory. Based on the management program 2P stored in the storage unit 21, the processing unit 20 receives a request from the device 1, performs data write / read processing, and the like, thereby realizing data distribution. The storage unit 21 uses a hard disk or a flash memory, and stores programs and data referred to by the processing unit 20 including the management program 2P.

  The communication unit 22 is a communication module that realizes communication connection to the network N. The communication unit 22 uses a network card, a wireless communication device, or a carrier communication module.

  Processing executed in the data distribution system 100 having such a hardware configuration will be described in order. First, a data distribution system 100 of the device 1 (for example, the IoT device in FIG. 2A) in which the user who uses the device 1 (FIG. 2D) which is a smartphone operates the operation unit 17 of the device 1 and the user has management authority. Device registration transaction (tx) information is transmitted to the nodes of the distributed DB network 101. Note that the device 1 itself that provides data may transmit device registration transaction information.

  In the distributed DB network 101, a node receives device registration transaction information. In the distributed DB network 101, a transaction is executed by processing a smart contract for device registration. The transaction is verified at a plurality of nodes, and as a result, the transaction is recorded in the distributed DB network 101. The device registration transaction information includes the address of the device 1 to be registered. The transaction may include attribute information (device type, position information) of the device 1 and a correspondence relationship with another device 1 (user). A device 1 that provides data can be specified by an address included in the transaction, and a reward can be provided to the wallet address of the device 1. A part of the reward from the device 1 that uses the data to the device 1 that provided the data may be used as a reward (fee) for processing to the node in the distributed DB network 101.

  As shown in FIG. 5, the address of each device 1 that provides data is recorded in the distributed DB network 101 based on the device registration transaction information from the device 1.

  Thereafter, the device 1 that provides the data stores the data in the data distribution system 102. FIG. 6 is a sequence diagram illustrating an example of a procedure of data storage processing in the data distribution system 100, and FIG. 7 is a schematic diagram illustrating an overview of the processing in FIG.

  The device 1 that provides data transmits the obtained data to the storage 200 periodically or every time an event is detected by processing based on the device program 1P of the processing unit 10 (step S101). The storage 200 records the data transmitted from the device 1 (step S201). The data is data such as physical quantities, state values, and position information detected by the detection unit 13, video data obtained from the imaging unit 14, data such as recognition results obtained from the video data, and the like.

  The device 1 transmits location information indicating the location of data in the storage 200 to the management apparatus 2 (step S102). The location information is information for specifying data in the storage 200, such as the network address of the storage device in which the data is stored and the identification information (name, directory information) of the data in the storage device. In step S102, the attribute information of the data is transmitted together with the location information. The attribute information includes time information such as detected time, shooting time, video length (time), time when data was derived, own position when data was detected, and position information indicating the own position at the time of shooting. Is preferably included. The attribute information may include data expiration date, data type, and the like.

  In the management device 2, the processing unit 20 receives the data location information and identification information at the communication unit 22 (step S202), and stores them in the storage unit 21 (step S203). The attribute information of the data stored in the management apparatus 2 includes identification information (address) of the transmission source device 1. The attribute information includes the type of recorded data (what kind of data), the position information corresponding to the recorded data (where the data was obtained), and the time information of the data (when the data was obtained) ) Is preferably included. At this time, the management apparatus 2 may confirm whether or not the device 1 identification information (address) is valid for the distributed DB network 101 based on a device registration transaction record.

  The device 1 that provides data derives a hash value for the data stored in the storage 200 (step S103). The processing unit 10 of the device 1 transmits data registration transaction information including the location information of the stored data and the hash value to the distributed DB network 101 (step S104). At this time, the device 1 may transmit the attribute information of the data in association with each other.

  In the distributed DB network 101, when any of the nodes receives data registration transaction information (step S301), transaction processing is executed by device registration smart contract processing (step S302). At a plurality of nodes, verification is performed based on the signature attached to the transaction using the public key of the device 1 that is the data transmission source (step S303). As a result, the transaction is recorded in the distributed DB network 101, and the data storage process ends. By recording the hash value and location information of the data in the distributed DB network 101, it is possible to use data whose contents have been verified whether or not the contents have been tampered with.

  Each time the device 1 that provides data records the data in the data distribution system 102 (stores in the storage 200 and transmits the attribute information to the management device 2), the device 1 executes the processing of FIG. The network 101 executes processing according to data from the device 1. The device 1 may record data in a plurality of times in the storage 200 and transmit the data location information and attribute information to the management apparatus 2 for storing each data. The device 1 may not only record already obtained data but also distribute the reserved data to the user's device 1. In this case, since there is no data itself, the hash value included in the data registration transaction is based on the transmission schedule of the data, or the communication information such as the network address and port for distribution in the management device 2 or the provider device 1. It may be based. The location information may be a location reserved for storing data in the storage 200, may be communication information such as a delivery address and a port in the management apparatus 2, or may be delivered directly from the device 1. The address of the device 1 may be used.

  The device 1 that uses data receives the data distribution right after acquiring the data access right in the distributed DB network 101. FIG. 8 is a sequence diagram illustrating an example of a procedure of data storage processing in the data distribution system 100.

  The device 1 that uses data transmits, to the distributed DB network 101, transaction information for token purchase that purchases, as a token, the access right to the data to be used, based on, for example, a user operation using the operation unit 17 (Step S1). S111). The transaction information includes information specifying data to be used and information (signature or the like) specifying the device 1 that uses the data. The specific information for specifying data is data identification information (location information) in the storage 200, a network address, or a wallet address of the device 1 to be provided. The specific information may include time, location, and information specifying data quality. The transaction information may include information on compensation for providing data. The consideration is digital assets such as virtual currency (in this case, electronic currency such as virtual currency distributed on the network that can be used as a price for granting access rights (data provision), other valuable information, certificates of quality certification, membership certification, etc. , Other access rights, ownership rights, voting rights, etc.) or any other alternative.

  In step S111, as described above, the device 1 transmits the transaction information including the specific information for specifying the token purchase target data. The specific information is acquired in advance by a search process. For example, the search processing may be performed by the management apparatus 2 that stores the attribute information of each data in the data distribution system 102 or may be performed in the distributed DB network 101. Search data (tag type information or analysis information such as similarity, relationship, or importance) may be created so that data registered in the distributed DB network 101 can be identified from an external service. The creation may be performed within the distributed DB network 101 or by the management apparatus 2, or may be performed by the sender of the data registration transaction. For example, a data search system may be provided as an external service, and a search request from the device 1 may be received for data in the distributed DB network 101, the search data may be searched, and specific information for identifying the data may be returned. Good.

  The distributed DB network 101 receives token purchase transaction information at any node (step S311). The received transaction is executed by processing of the smart contract for token purchase (step S312). In step S312, a token (access right) is given to the device 1 that uses the data and a reward is given to the device 1 that provided the data to be used. In providing the reward to the device 1, the address of the device 1 that provides the data is specified based on the information for specifying the data, and the predetermined virtual currency is transferred from the address of the user's device 1 to the specified address. It is realized with. The amount of virtual currency may be specified by the purchaser, or may vary depending on the size, time, importance, and popularity of the data, and may be determined according to conditions in the smart contract. The plurality of nodes verify the transaction using the public key of the device 1 that is the transmission source of the transaction (step S313). As a result, in the distributed DB network 101, it is recorded so as to be able to guarantee which data (data from which device 1) is used by the device 1 to be used, and from which device 1 to which device 1 is rewarded Paid or recorded. In the distributed DB network 101, one of the nodes notifies the device 1 that the token purchase has been successful (step S314). Most of the consideration included in the transaction information is given as a reward to the device 1 that provides the data, but a part is paid as a fee for the distributed DB network 101 and as a reward for processing the transaction in each node. used.

  In step S312, a process of checking the validity of data requested to be used in a transaction may be performed by a smart contract process. For example, the node that executes the smart contract requests the data distribution system 102 to transmit data based on the information specifying the data specified in the transaction, and transmits the transmitted data and the data registration transaction of the data. The validity of the data is checked using the included hash value.

  When the device 1 confirms the result of the token purchase (step S112), the device 1 transmits a data request including its own address and information for specifying data to be used to the data distribution system 102 (step S113). In step S112, the processing unit 10 of the device 1 determines whether or not the token purchase is successful. If the token purchase is not successful, the process ends. If successful, the process continues. In step S113, the device 1 preferably transmits authentication information such as a signature together with its own address.

  When the management apparatus 2 receives a data request from the device 1 which is a user (step S211), the management apparatus 2 determines whether the request source token is valid based on the information specifying the address of the device 1 and the data to be used. An inquiry is made to the DB network 101 (step S212). In step S212, the processing unit 20 of the management device 2 authenticates whether or not the request source itself is valid based on the authentication information included in the request source data request, and makes an inquiry only when the authentication is successful. It is desirable to prevent spoofing of the device 1 having the access right by taking measures such as taking measures.

  As described above, the distributed DB network 101 records which data is used by the device 1 as a user and how much remuneration is provided to the device 1 as a data provider. . The contents can be confirmed at any node. Therefore, the token (access right) inquiry from the management apparatus 2 is accepted at an arbitrary node (step S315). The node that has received the inquiry confirms whether or not the token of the device 1 that desires access is valid based on the record in the distributed DB network 101 (step S316). In step S316, the node of the distributed DB network 101 acquires the inquired data from the storage 200 via the management apparatus 2, and the data itself is falsified based on the hash value included in the data registration transaction of the data. It is preferable to determine whether or not it has been done. The node returns the confirmation result to the management apparatus 2 (step S317).

  Based on the response from the distributed DB network 101, the processing unit 20 of the management apparatus 2 determines whether or not the token of the device 1 that is the user is valid (step S213). When it is determined that the data is valid (S213: YES), the processing unit 20 transmits data to the device 1 based on the specified information (step S214). In step S214, it is desirable to transmit data only when the authentication that the device 1 is valid as the data request source is successful based on the above-described authentication information.

  The device 1 receives the transmitted data (step S114), thereby ending the data distribution process.

  If it is determined in step S213 that it is not valid (S213: NO), the data request is rejected as it is, and the process ends.

  In step S <b> 214, the processing unit 20 of the management apparatus 2 reads and transmits data already recorded in the storage 200 every time a request is received from the device 1. Note that the token is preferably purchased by specifying the number of transmissions and the period during which transmission is possible. Basically, it is desirable that the token be purchased for each transmission. However, the processing unit 20 may transmit data transmitted from the device 1 to the user device 1 each time, for example, for a certain period of time based on the token once confirmed as valid.

  In step S316, it is preferable that the node of the distributed DB network 101 checks the alteration of the data itself, but this should not be limited to this. The management device 2 may perform a tampering check or may perform a tampering check after the data user device 1 receives data. The device 1 that is a data provider may perform a tampering check at an arbitrary timing.

  In this way, the access right to the data is automatically guaranteed in the distributed DB network 101, so that the data user device 1 can obtain and use the data properly. Automatic transactions according to usage conditions using attribute information (time, data size, quality), etc. are also possible. In addition, since payment of rewards is performed with digital assets such as virtual currency, micropayment (payment within the minimum unit of legal currency) is possible. Therefore, it is possible to pay a reward to the device 1 for acquiring one piece of data from a certain device 1 only once. In the case of legal currency, considering that it was difficult to buy and sell data only in units that could be traded, such as hours, days, months, or dozens of times Data that has not been traded so far, and data whose value is found by users other than the administrator can be traded. As a result, it is possible to recycle the enormous amount of data stored or stored by the business operator.

  Data distribution realized by the data distribution system 100 of the present disclosure will be specifically described with reference to a plurality of examples.

Example 1
FIG. 9 is a diagram illustrating the data distribution system 100 according to the first embodiment. In the first embodiment, the device 1 that provides data is a camera (FIG. 2B) and is installed for monitoring purposes.

  The owner of the device 1 that provides data performs device registration of the device 1 that is a camera to the distributed DB network 101 by the device 1 that is an information terminal device used by the device 1 itself. Thereafter, the device 1 which is a camera does not delete (is overwritten) when the captured video data is not used for the role of the surveillance camera, and corresponds to the address (wallet address, public key) for identifying itself. In addition, it is stored in the storage 200. The device 1 transmits data registration transaction information including the hash value of the data stored in the storage 200 and the location information indicating the location of the data to the distributed DB network 101. As a result, the distributed DB network 101 records that the data that is the basis of the hash value is stored at the location indicated by the location information.

  Then, the device 1 transmits the location information of the video data in the storage 200 to the management device 2. The device 1 includes position information (latitude / longitude, area name, address, etc.) indicating the installation location of the camera, time information indicating the time when the stored video data was captured, time information indicating the time zone, and video data as attribute information along with the location information Information on the size indicating the length or capacity is transmitted to the management apparatus 2. In the management apparatus 2, the processing unit 20 stores the attribute information in the storage unit 21 together with the address and location information of the transmission source device 1 in association with the identification information of the video data.

  The purchaser of data is an urban development organization, a security company, the media, etc., and has a desire to acquire video data captured at a certain time zone or video data captured at a later time. . The purchaser can perform a search based on the attribute information of the video data in the management apparatus 2 using the device 1 (FIG. 2D) which is a personal computer, for example. Of course, if the purchaser of the data can specify the device 1 that provides the data, it may be specified without performing a search using the address. The management device 2 extracts a search result based on the attribute information in response to the search request based on the management program 2P.

  The data purchaser purchases a token of desired video data based on the search result. The purchaser operates the device 1 to be used, and causes the device 1 to transmit token purchase transaction information to the distributed DB network 101. As shown in FIG. 9, since the device 1 (0x03d ...) used by the purchaser has purchased the access right (token) to the data of the identification information “123” in the distributed DB network 101, the identification information The contents of the transaction that the reward is paid to the device 1 (0x08e...) That provided the data “123” is recorded.

  The purchaser who has successfully purchased the token requests data from the management apparatus 2 using the device 1 that has transmitted the transaction information for token purchase. The processing unit 20 of the management apparatus 2 confirms the token for the target data with the distributed DB network 101 based on the address of the device 1 that requested the data. Since the contents of the transaction are recorded in the distributed DB network 101 as described above, the management apparatus 2 can confirm the token of the device 1 for the target data. The management apparatus 2 acquires the target data from the storage 200 (or acquires the location of the target data), and transmits it to the device 1 that requested the data. In this way, data distribution via the distributed DB network 101 is realized.

  In the first embodiment, video data captured by a number of monitoring cameras (device 1) is stored in the storage 200. Even if the video data is not used by the owner of the device 1 due to the role of the surveillance camera, if the purchaser who is the other person finds value, a reward is paid for the video data captured by the device 1 Is called. As a result, video data can be utilized and data can be capitalized.

  In the first embodiment, the owner who installed the camera uses the secret key for the virtual currency of the reward paid to the wallet of the device 1 that provided the data to the device 1 which is an information terminal device that the owner uses. By moving the camera, the owner of the camera can obtain an asset based on the reward of the camera.

  In the first embodiment, the data once stored in the storage 200 is distributed via the management device 2. However, as described above, the storage capacity of the monitoring camera device 1 and the processing capability of the processing unit 10 are sufficient. If so, data may be transmitted directly from the device 1 to the purchaser's device 1. FIG. 10 shows an example of processing when data is directly transmitted between the devices 1. In this case, the process (step S211 to step S214) of the management apparatus 2 in FIG. 8 is executed by the device 1 that provides data. The location information in the case of directly transmitting data is based on communication information such as a network address and port for distribution in the provider device 1. Further, it may be address information for requesting data transmission to the provider device 1. The device 1 receives the request message, and when the token is confirmed, the device 1 adds the data to the message and transmits it. Is also feasible.

  In the schematic diagrams of FIGS. 9 and 10, one smart contract is illustrated in the distributed DB network 101, and it is described that each transaction is processed by this smart contract. However, this only shows a function as a set of the distributed DB network 101. The processing for each of the device registration, data registration, and token purchase transactions may be executed by different nodes each assigned a role, and any node can be configured to play the same role as a smart contract. It may be executed at the node that received the transaction.

(Example 2)
FIG. 11 is a diagram illustrating the data distribution system 100 according to the second embodiment. In the second embodiment, the device 1 that provides data is a device including a sensor or a switch arranged in a residence where a HEMS (Home Energy Management System) is installed (FIG. 2A). The device is, for example, a lighting device. The lighting device includes a switch as the switching unit 15 and can recognize the state of the switch. The device is, for example, an air conditioner or a cooking device. The device may be an outdoor charger. These devices include a temperature sensor, a humidity sensor, a light receiving sensor, an ammeter, a voltmeter, or the like as the detection unit 13. The device 1 may be an IoT gateway that exchanges signals with a device group.

  The owner of the device 1 that provides data is the owner (resident) of a residence where HEMS is introduced. The owner performs device registration of a group of devices, which are sensors or switches arranged in a residence, with the distributed DB network 101 by using the device 1 which is an information terminal device used by the owner. Each group of devices periodically stores data indicating measured values or switch status as a resident's life log, or stores the data type (temperature data, switch status, etc.) in the storage 200 whenever the status changes. ) And time information indicating the time or time zone when the data is acquired. The device group 1 also associates an address for identifying itself when storing data. The device group 1 may store the storage 200 in association with identification information for identifying its own residence. The device group transmits data registration transaction information including the hash value of the data and the location information indicating the location of the life log data in the storage 200 to the distributed DB network 101. Thereby, it is recorded in the distributed DB network 101 that the data that is the source of the hash value is stored at the location indicated by the location information.

  The device 1 transmits location information and attribute information indicating the location of the life log data in the storage 200 to the management apparatus 2. The attribute information in the second embodiment is the type of the device 1 itself (whether it is lighting equipment or air conditioning equipment), identification information for identifying a residence, location information indicating a residence address or area, or a residence specification or a resident configuration. Condition information indicating (number of people living together, age, family composition, etc.) may be used. In the management device 2, the processing unit 20 stores the attribute information in the storage unit 21 in association with the data identification information.

  Purchasers of data are household appliances / daily necessities manufacturers, healthcare services, energy such as electricity or gas, infrastructure providers such as water and sewage, HEMS providers, etc. They have a desire to analyze product development and new service design. The purchaser can search for information specifying a life log provider in the management device 2 using the device 1 used by the purchaser. For example, data can be searched based on attribute information such as family structure, address, or area, or data can be searched by type such as only room temperature data or only power consumption data.

  The purchaser of data purchases a token of data related to a desired life log based on the search result. The purchaser transmits the token purchase transaction information from the device 1 to be used to the distributed DB network 101. Subsequent processing is as described above. In the distributed DB network 101, it is recorded that a token has been purchased by a data purchaser and a reward has been paid to the device 1 that provided the data in accordance with this purchase. Since the transaction recorded in the distributed DB network 101 is not falsified, the management apparatus 2 refers to this record and distributes data only to the device 1 having the access right. At the time of token purchase, a past or future period is set as a condition of access right, and whether or not the data distributed by the management apparatus 2 has been tampered with is confirmed using a hash value, The data period can be distributed only when it matches the access right conditions. Each device 1 that is a data provider can receive a reward for its own address depending on whether or not the measured data has been purchased.

Example 3
FIG. 12 is a diagram illustrating the data distribution system 100 according to the third embodiment. In the third embodiment, the device 1 that provides data is a wearable device, and includes a heart rate monitor using a light receiving sensor or the like, and a detection unit 13 that is a GPS reception unit that detects a position, and a communication unit 12 and is mounted. The user's health data (heart rate, body temperature, amount of exercise, position information, etc.) is acquired (FIG. 2A).

  The owner of the device 1 that provides data is a user who wears the device 1 and uses it. The owner performs device registration of the device 1 that is a wearable device to the distributed DB network 101 by the device 1 that is another information terminal device that the owner uses. At this time, the address correspondence between the device 1 used by the owner and the device 1 that provides the data may be recorded together.

  The device 1 that is a wearable device stores the measurement value as personal health data in the storage 200 periodically or whenever an event is detected. For the stored health data, the device 1 includes attribute information including time information such as the type of each data (heart rate, body temperature, exercise amount, position information, etc.) and the time or time zone when the data was acquired. Save it in association with the address that identifies itself. The device 1 transmits transaction information for data registration including a hash value of health data stored in the storage 200 and location information indicating the location of the data to the distributed DB network 101. As a result, the distributed DB network 101 records that the data that is the basis of the hash value is stored at the location indicated by the location information.

  The device 1 transmits location information indicating the location of the health data in the storage 200 and attribute information to the management apparatus 2. The attribute information in the third embodiment includes at least the address of the device 1 itself. The attribute information may include wearer identification information (such as an account for a healthcare service related to the wearable device). In the management apparatus 2, the processing unit stores the attribute information in the storage unit 21 in association with the data identification information.

  The purchaser of data is a provider of a healthcare service related to a wearable device or an insurance company, obtains health data, provides a service to the wearer, and sets insurance premiums based on the health data. The purchaser can retrieve data from the identification information of the wearer in the management device 2 using the device 1 (FIG. 2D) used by the purchaser.

  The data purchaser purchases a token of the desired wearer's health data. The purchaser transmits the token purchase transaction information from the device 1 to be used to the distributed DB network 101. In the distributed DB network 101, the contents of the token purchase transaction are recorded in a state where it is difficult to tamper with the smart contract process at any node. Thereby, the purchaser of data can acquire the health data of the desired wearer stored in the storage 200 from the management apparatus 2 on the basis of the token.

  Also in the third embodiment, it is possible to transmit data between the devices 1 without going through the management device 2 and the storage 200 within a range in which the health data that is personal information can be concealed from others.

Example 4
FIG. 13 is a diagram illustrating the data distribution system 100 according to the fourth embodiment. In the fourth embodiment, the device 1 that provides data has a camera and is a movable body that moves freely (for example, a drone for photographing). This moving body is managed by an administrator for the purpose of taking a picture in accordance with an instruction.

  The administrator of the device 1 that is a mobile object performs device registration of the device 1 that is a mobile object using the device 1 that is an information terminal device used by the administrator. The device 1 stores the captured video data in the storage 200 in association with an address for identifying itself. The device 1 transmits data registration transaction information including the hash value of the stored video data and the location information indicating the location of the video data in the storage 200 to the distributed DB network 101. As a result, the distributed DB network 101 records that the video data that is the source of the hash value is stored at the location indicated by the location information.

  The device 1 storing the video data transmits the location information and attribute information of the video data to the management device 2. The attribute information is position information indicating the location and range where the video data was captured, time information indicating the time or time zone, and size information indicating the length or capacity of the video data. In the management apparatus 2, the processing unit 20 stores the attribute information in the storage unit 21 together with the address and location information of the transmission source device 1 in association with the identification information of the video data. The attribute information may be recorded in the storage 200 in association with the video data.

  Buyers of data are urban development organizations, security companies, media, and so on. The data purchaser searches for video data in the management apparatus 2 in the same manner as in the first embodiment, and purchases a token of the video data based on the search result. In the distributed DB network 101, since the device 1 used by the purchaser has purchased the access right (token) to the desired data, the contents of the transaction that the reward was paid to the device 1 that provided the desired data. Is recorded.

  The purchaser of data can obtain desired video data with the purchased token, and the device 1 that provided the video data can obtain a reward. The device 1 can also purchase energy (electric power) for movement based on this reward. The charging station controller also has a wallet address based on a secret key. The control device of the charging station includes a communication unit that realizes P2P communication with the device 1 and a processing unit that executes a smart contract (power purchase) that permits supply of power according to the face value (consideration) of the virtual currency. The device 1 moves on its own to the charging station, and executes power purchase by P2P communication from the virtual currency associated with its own address. In this way, the devices 1 communicate with each other to exchange data and rewards or energy and consideration. Note that the process of purchasing energy (electric power) between the charging station and the mobile device 1 may also be executed in the distributed DB network 101.

  In the fourth embodiment, the access right to the control data (position information, time information) for the device 1 that is a mobile body may be purchased as a token. When the data purchaser wants the device 1 to photograph a place at a certain time, he purchases the access right of the control schedule as a token. Since it is recorded in the distributed DB network 101 that the control schedule has been legitimately purchased by the purchaser, the management device 2 confirms the record of this transaction and sends a control instruction in response to the control request. It becomes possible.

(Example 5)
FIG. 14 is a diagram illustrating the data distribution system 100 according to the fifth embodiment. In the first embodiment, the device 1 that provides data is a vehicle in which sensor technology is integrated (hereinafter, described as an in-vehicle device that performs communication).

  The device 1 that provides the data, that is, the owner of the vehicle, performs device registration of the device 1 that is the in-vehicle device with respect to the distributed DB network 101 by the device 1 that is the information terminal device used by itself. The device 1 that is an in-vehicle device stores travel data created from information obtained by the detection unit 13 that is a sensor group disposed in the vehicle in the storage 200 in association with an address that identifies the travel data. The travel data includes, for example, numerical data obtained from a travel distance meter at each time point and a travel position history. The travel data may include fuel consumption, sudden braking frequency, and rapid steering frequency. In addition, data obtained from a sensor group arranged in the vehicle is included. Video data captured by an in-vehicle camera may be included. The device 1 transmits transaction information for data registration including the hash value of the stored travel data and the location information indicating the location of the data to the distributed DB network 101. As a result, the distributed DB network 101 records that the data that is the basis of the hash value is stored at the location indicated by the location information.

  The device 1, which is an in-vehicle device, transmits the location information and attribute information of the travel data in the storage 200 to the management device 2. The attribute information includes the address of the transmission source device 1. The attribute information may include a vehicle body identification number, a vehicle type, or a time at which each traveling data is transmitted. The management device 2 stores the attribute information in the storage unit 21 in association with the identification information of the travel data.

  In the fifth embodiment, the purchaser of data is an urban development organization, an autonomous driving technology development company, or the like, and has a desire to obtain travel data of various vehicles. The purchaser can search for desired traveling data in the management apparatus 2 using the device 1 to be used. For example, it is possible to search by vehicle type, time, region, or the like.

  The data purchaser purchases a token of data related to desired traveling data based on the search result. In the distributed DB network 101, since the device 1 used by the purchaser has purchased an access right (token) to the desired travel data, a reward is paid to the device 1 (vehicle) that provided the desired travel data. The contents of the transaction are recorded.

  The purchaser of data can acquire desired traveling data by the purchased token, and the device 1 that provided the traveling data can obtain a reward. The device 1 can also pay insurance premiums to be paid for various compensations in the event of an accident based on this reward. An information processing apparatus in an insurance company also has a wallet address based on a secret key. The information processing apparatus includes a communication unit that realizes P2P communication with the vehicle-mounted device 1 and a communication unit that communicates with the management device 2. The management device 2 can receive a reference to travel data stored in the storage 200 based on the vehicle body identification number from the information processing device. In the fifth embodiment, in the case of reference from an insurance company, there is no reward for providing data. The information processing apparatus of the insurance company calculates the insurance premium based on the travel distance and the driving situation (roughness of driving, etc.) and charges it to the device 1 which is a vehicle. The device 1, which is a vehicle, pays insurance premiums using virtual currency associated with its own address. In the information processing apparatus, the distributed DB network 101 may transmit insurance information payment and transaction information that records that compensation according to the payment is made. In this way, the devices 1 can communicate with each other and exchange data and rewards or enjoy services and insurance premiums directly.

(Example 6)
FIG. 15 is a diagram illustrating the data distribution system 100 according to the sixth embodiment. In the sixth embodiment, the device 1 that provides data is a moving body that has a camera and moves freely, and the device 1 that uses data is a vehicle (on-vehicle device).

  As for the device 1 that is a moving body, device registration is performed by the administrator as described in the fourth embodiment, and video data obtained by photographing road conditions in various places by the device 1 is stored in the storage 200. A hash value of the stored video data and data registration transaction information indicating the location of the video data are transmitted from each device 1 (which may be a separate apparatus that collects information from the device 1) to the distributed DB network 101. Is done. In the distributed DB network 101, it is recorded that the video data that is the source of the hash value is stored at the location indicated by the location information.

  The mobile device 1 transmits the location information and attribute information of the video data to the management apparatus 2. The attribute information includes position information and time information as in the fourth embodiment. In the management apparatus 2, the processing unit 20 stores the attribute information in the storage unit 21 together with the address and location information of the transmission source device 1 in association with the identification information of the video data. The attribute information may be recorded in the storage 200 in association with the video data.

  In the sixth embodiment, the purchaser of data is a vehicle, and the device 1 that uses the data is a vehicle-mounted device that performs the function of, for example, a navigation system of the vehicle. As for the device 1 that uses data, the owner of the vehicle performs device registration with the distributed DB network 101 using the device 1 that is an information terminal device that the vehicle owner uses. The device 1 that uses data needs, for example, a route to a set destination or road condition data in the vicinity of the current location. The device 1 that uses the data requests the management apparatus 2 for data together with the position information for specifying the route or the vicinity of the current location.

  In the management apparatus 2, the processing unit 20 extracts video data that can provide the requested road condition data from the storage 200. It is not necessary to target only the video data stored in the storage 200 at that time. The processing unit 20 may specify the device 1 that can provide the video data based on the position information transmitted together with the request upon receiving the position information of each device 1 that is a moving body. The processing unit 20 returns the address of the identified mobile device 1 to the data requesting device 1 as a search result.

  The data purchaser's device 1 purchases the access right to the video data provided from the device 1 as a token based on the address of the data provider's searched device 1, and pays a reward for transaction information of token purchase. Is transmitted to the distributed DB network 101. In the distributed DB network 101, since the device 1 used by the purchaser has purchased the access right (token) to the desired data, the contents of the transaction that the reward was paid to the device 1 that provided the desired data. Is recorded.

  In the management apparatus 2, the processing unit 20 confirms whether the token of the video data that is the source of the requested data is valid, and acquires the target video data from the storage 200. After confirming the validity of the video data to the distributed DB network 101, the processing unit 20 may transmit the video data to the device 1 of the data purchaser as it is. However, as much as possible, the processing unit 20 may analyze the video data by the processing unit 20 itself or an external device, create information indicating road conditions in each place based on the video data, and transmit the information to the request source.

  As a result, information indicating road conditions is exchanged between the device 1 which is a vehicle and the device 1 which is a photographing drone, and the data provider device 1 can obtain a reward for the provision. In this way, it is possible to exchange data autonomously between devices 1 and to buy and sell data autonomously between devices 1.

  When a vehicle is used as a data user and data is used in order for the vehicle to travel efficiently, not only a shooting drone as shown in the sixth embodiment but also a beacon, a signal controller, and the like can be data providers. Information is exchanged between the vehicle 1 traveling on the road, the beacon, and the signal controller, and the signal controller appropriately changes the signal control according to the traveling state of the vehicle. Can be realized.

(Example 7)
FIG. 16 is a diagram illustrating the data distribution system 100 according to the seventh embodiment. In the first embodiment, the device 1 that provides data is an information processing apparatus connected to the camera (14). For example, the device 1 includes the display unit 16 and is installed for digital signage.

  The information processing apparatus that is the data provider in the seventh embodiment also has the functions of the management apparatus 2 and the storage 200. Based on the video data captured by the camera 14, the information processing apparatus identifies the number of persons in the imaging range of the camera 14, each gender, estimated age, and destination. The information processing apparatus stores traffic data such as the specified number of people, gender, estimated age, and destination in the storage 200 as provided data. As the device 1 that is the data provider, the information processing apparatus transmits the hash value of the stored traffic data and the transaction information for registering the location information indicating the location in the storage 200. In the distributed DB network 101, it is recorded that the traffic volume data that is the basis of the hash value is stored at the location indicated by the location information. The provided traffic volume data may be traffic volume data obtained a predetermined time ahead. In this case, the data stored in the storage 200 (the source of the hash value) is a transmission schedule or the like.

  The information processing apparatus stores, as the management apparatus 2, attribute information such as the specified time and its own address in association with the location information of the saved traffic data.

  In the seventh embodiment, the data purchaser is an operator of a store or commercial facility in a district including a place where the information processing apparatus is installed. The business operator purchases a token for traffic data based on the address (wallet address) of an information processing apparatus installed as digital signage by using the device 1 which is an information terminal device used by the business operator. In the distributed DB network 101, a transaction that the device 1 used by the purchaser has purchased the access right (token) to the desired traffic data, and the reward is paid to the device 1 that provided the desired data. Is recorded.

  A data purchaser who has purchased a token requests traffic data from the information processing apparatus by means of the device 1. The information processing apparatus confirms the token with the distributed DB network 101 as the management apparatus 2 and transmits the requested traffic data to the requesting device 1. For example, the traffic volume data is information such as “female, 2” (= two women) as shown in FIG. Device 1 that purchased traffic data is an effective way to output information for two women at the store (digital signage), issue coupons, exchange data between devices 1 and use the data. Advertising can be realized.

  As shown in the first to seventh embodiments, using the distributed DB network 101, each device 1 having an address based on the wallet purchases the data access right as a token, and the legitimate data is based on the token. Can be exchanged. As a result, it is possible not only to use the data manager within the business field, but also to encourage the use by others who find value in the data, and to activate the data resource.

  Of course, the data distributed in the data distribution system 100 according to the present embodiment is not limited to the image / video data, life log data, health data, vehicle driving data, and traffic volume data shown in the first to seventh embodiments. It can be any digital resource. For example, with regard to the agricultural field, the measurement data obtained by IoT devices that are sensors in the growing environment, production data indicating information on fertilizer, etc., growth data of inspection results indicating the growth status of crops, and logistics data such as shipment records of crops There may be. In addition, since the data registration transaction described above can prevent falsification to the original data, copyrighted data such as articles, photographs, and posted texts may be targeted. In this case, in the copyrighted work data, a signature based on the secret key corresponding to the device 1 used by the data provider and information identifying the author are combined and a hash value is derived and registered together, and illegal quoting, falsification, This makes it possible to detect when the author has been impersonated. Further, it is also possible to operate such that the price for secondary use using copyrighted work data is paid to the device 1 of the original data provider. Furthermore, the credit information data used in deriving the credit quality related to the lending and borrowing of assets may be targeted. When using payment history for not only owned assets but also rents, utility charges, and credits as credit information, the database of payment history and other data managed by the administrator is used as digital assets with the access rights to these histories. It is also possible to do. The distribution data may be financial data indicating the transaction status regarding assets such as legal currency and stock. Data (measurement data or the like) obtained by the device 1 used during energy production or consumption may be targeted. In this way, the data that can be used by other people and can become digital resources is not exchanged between humans who manage each data, but is exchanged between the devices 1 that generate the data. It is realistic to activate digital resources by realizing data distribution based on access rights.

  It should be understood that the embodiment disclosed above is illustrative in all respects and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 100 Data distribution system 101 Distributed DB network 102 Data distribution system 200 Storage 2 Management apparatus 3 Processing apparatus 10, 20, 30 Processing part 11, 21, 31 Storage part 12, 22, 32 Communication part 13 Detection part 14 Imaging part 15 Switching Part 16 Display part 17 Operation part

Claims (8)

A data transmission / reception method for transmitting / receiving data between a first device that provides data and a second device that requests the data,
The first device autonomously transmits the data acquired or generated by the first device to a recording device,
The second device includes purchase transaction information for purchasing a token corresponding to the right to access the data, connected to each other via a network, and configured by a plurality of processing nodes and storage media that respectively perform predetermined calculations. , The plurality of processing nodes perform the calculation and transmit to a distributed database network system that holds information by distributing to a plurality of storage media,
The processing node of the distributed database network system records purchase of the token by the second device and provision of reward to the first device providing the data based on the purchase transaction information. , Attribute the token to a wallet address corresponding to the second device,
The data request from the second device is received by a data processing device that processes data in the recording device,
The data processing apparatus transmits an inquiry as to whether or not the second device has an access right to the data to any processing node of the distributed database network system,
The processing node of the distributed database network system determines whether the second device has an access right to the data based on a token belonging to a wallet address corresponding to the second device,
The data processing method, wherein the data processing apparatus transmits the data to the second device when it is determined that the processing node has an access right. The first device transmits location information indicating the location of the data and a hash value derived based on the data to a distributed database network system,
The processing node of the distributed database network system includes:
Record the location information and hash value in association with each other,
Obtain data of the location indicated by the location information,
The data transmission / reception method according to claim 1, wherein the presence / absence of falsification of the data is determined based on the hash value. The first and second devices are respectively
A storage unit storing a unique secret key, and sending its wallet address based on the secret key to the distributed database network system;
The processing node of the distributed database network system stores the wallet addresses of the first and second devices;
The data transmission / reception method according to claim 1, wherein the provision of the reward is a transfer of a digital asset from a wallet address of the second device to a wallet address of the first device. The data transmission / reception method according to any one of claims 1 to 3, wherein the first device includes an imaging unit and provides still image data or video data. 5. The data transmission / reception according to claim 4, wherein the first device is a moving body and includes a detection unit that detects a position, and provides the still image data or video data together with position information indicating a position detected by the detection unit. Method. The data according to any one of claims 1 to 3, wherein the first device is a wearable device including a detection unit that detects a heartbeat of a wearer, and provides health data including a heartbeat detected by the detection unit. Transmission / reception method. 4. The data transmission / reception method according to claim 1, wherein the first device is an in-vehicle device, and the in-vehicle device provides travel data of a vehicle on which the first device is mounted. A data transmission / reception method for transmitting / receiving data between a first device that provides data and a second device that requests the data,
The second device comprises purchase transaction information for purchasing the right to access the data, a plurality of processing nodes and storage media each performing a predetermined calculation, and performing the calculation and distributing the information to the plurality of storage media. To the distributed database network system that holds the information,
The processing node of the distributed database network system purchases the access right of the data by the second device and provides a reward to the first device that provides the data based on the purchase transaction information. Record the transaction that contains
In response to the data request from the second device, the processing node of the distributed database network system determines whether or not the second device has an access right to the data based on the transaction,
A data transmission / reception method in which the data is transmitted to the second device when it is determined that the user has an access right.

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