JP6842025B1 - Nodes, trading systems, processing methods, programs and blockchain networks - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a node, a trading system, a processing method, a program and a blockchain network for the purpose of preventing double issuance when issuing a certificate of an asset production method. In a trading system 1, nodes 9a to 9d in a blockchain network 90 store asset information indicating a type of asset production method and an issuance status of a certificate for certifying the production method. The nodes 9a to 9d receive the issuance request information sent from the image processing device 7A indicating that the issuance of the certificate for the predetermined asset is requested. When the issuance status of the asset corresponding to the received issuance request information has not been issued, the nodes 9a to 9d update the issuance status shown in the stored asset information to have been issued and change to the received issuance request information. When the issuance status of the corresponding asset has been issued, an issuance notification indicating that the certificate has been issued is transmitted to the image processing device 7. [Selection diagram] Fig. 1

Description

The present invention relates to nodes, trading systems, processing methods, programs and blockchain networks.

In recent years, green power (electric power produced by renewable energy) has been attracting attention. Green power is produced by utilizing resources that are renewable energies such as solar power, solar heat, wind power, biomass, geothermal power, hydropower, and heat in the atmosphere. Compared to fossil fuels such as petroleum, coal, and liquefied natural gas, power generation using renewable energy _{emits almost no CO 2} that causes global warming, so it is a resource used for power production. Among them, renewable energy is an environmentally friendly energy source. By operating factories and the like using such environmentally friendly green power, corporate value can be improved. In addition, there is a method of using a blockchain for trading electric power produced by renewable energy or the like (see Patent Document 1).

Here, even if the production method of the asset is different, such as the type of resources used for producing the asset such as electric power is different, the quality of the asset such as electricity finally reaching the user is the same. The user does not know whether the delivered electricity was produced using renewable energy. Therefore, in order to prove the transaction of assets such as electric power produced by renewable energy, a certificate issued by a certification body such as a certificate issuing company licensed by the national or local government is used. .. For example, a company can apply for the issuance of a certificate and use the issued certificate to prove the added value to the environment to improve the corporate value. Further, a method of using a blockchain in the transaction of securities having properties similar to a certificate is also known (see Patent Document 2).

However, in order to avoid unauthorized use of the certificate issued by the certification authority, it is necessary to prevent the certificate with the same content from being issued many times. There was a problem that it could be issued twice without knowing it.

In order to solve the above-mentioned problems, the invention according to claim 1 is a node in a blockchain network, and indicates the type of asset production method and the issuance status of a certificate for certifying the production method. The storage means for storing the asset information, the receiving means for receiving the issuance request information sent from the information processing device indicating that the certificate is requested for the predetermined asset, and the received issuance request information. When the issuance status of the corresponding asset is unissued, the asset processing means for updating the issuance status shown in the stored asset information to issued and the asset corresponding to the received issuance request information When the issuance status is issued, the node is characterized by having a transmission means for transmitting an issued notification indicating that the certificate has been issued to the information processing apparatus.

As described above, according to the present invention, it is possible to prevent double issuance when issuing a certificate of an asset production method.

It is a schematic diagram of the trading system which concerns on this embodiment. It is a hardware configuration diagram of a smartphone. It is a hardware block diagram of a smart meter. It is a hardware configuration diagram of an intermediary server, a certificate issuing server, and a node. It is a hardware block diagram of an image processing apparatus. It is a functional block diagram of a smartphone and a smart meter in a trading system. It is a functional block diagram of an intermediary server, a certificate issuing server, and a node in a trading system. It is a functional block diagram of an image processing apparatus in a trading system. (A) is a conceptual diagram showing a user management table, and (b) is a conceptual diagram showing a provider management table. (A) is a conceptual diagram of the transaction content management table, and (b) is a conceptual diagram of the transaction history management table. (A) is a conceptual diagram of the applicant management table, and (b) is a conceptual diagram of the certificate type management table. It is a sequence diagram which showed the registration process of an intermediary. (A) is a display example of an intermediary registration screen, and (b) is a diagram showing a display example of an intermediary registration screen. It is a sequence diagram which showed the registration process of the transaction content of an asset. (A) is a display example of the transaction content registration screen before input and selection, and (b) is a diagram showing a display example of the transaction content registration screen after input and selection. It is a sequence diagram which shows the process of setting the owner of the asset provided by a provider as an intermediary. It is a conceptual diagram of transaction information and asset information. It is a sequence diagram which showed the process of setting the owner of the asset which an intermediary mediates to a user. It is a conceptual diagram of transaction information and asset information when electric power is traded. It is a sequence diagram which showed the issuance process of the asset production method certificate. (A) is a display example of the certificate issuance screen before input and selection, and (b) is a diagram showing a display example of the certificate issuance screen after input and selection. It is a sequence diagram which showed the issuance process of the asset production method certificate. It is a conceptual diagram of transaction information and asset information when a certificate is issued. It is a figure which showed an example of the printed production method certificate. It is a functional block diagram of an intermediary server, a certificate issuing server, and a node in the transaction system which concerns on the modification 1. It is a sequence diagram which showed the issuance processing of the production method certificate of an asset in the transaction system which concerns on modification 1. FIG. It is a sequence diagram which showed the issuance processing of the production method certificate of an asset in the transaction system which concerns on modification 1. FIG. It is a functional block diagram of the image processing apparatus in the trading system which concerns on modification 2. FIG. It is a sequence diagram which showed the issuance processing of the production method certificate of an asset in the transaction system which concerns on modification 2. FIG. It is a sequence diagram which showed the issuance processing of the production method certificate of an asset in the transaction system which concerns on modification 2. FIG.

Hereinafter, modes for carrying out the invention will be described with reference to the drawings. In the description of the drawings, the same elements are designated by the same reference numerals, and duplicate description will be omitted.

[Outline of system configuration]
First, the outline of the configuration of the trading system 1 will be described. FIG. 1 is a schematic diagram of a trading system according to the present embodiment. Here, the case of handling electric power as an example of an asset will be described. The ownership of the asset and the type of the asset production method are managed by the asset information described later.

<Explanation of each vendor>
As shown in FIG. 1, there are an electric power producer Aa, an electric power producer Ab, an electric power consumer Ca, an intermediary Da, and an applicant E. Producer Aa is an example of a provider, a trader who produces electricity from solar power as an example of renewable energy used in the production of green electricity. Producer Ab is an example of a provider, a trader who produces electricity from petroleum as an example of fossil fuels. The providers also include unions that purchase and resell assets from each producer. Consumer Ca is an example of a user and is a trader who consumes electric power provided by producers Aa and Ab. The users include those who have decided to own the assets in the case of real estate where the assets are not consumed like electric power. Mediator Da is a trader that mediates the transaction of ownership of electricity. Applicant E is a user who makes various applications using a production method certificate issued by a public institution such as a national or local public institution for certifying the type of electric power production method. Examples of the type of electric power production method include a method of producing electric power by utilizing solar power, solar heat, wind power, biomass, geothermal power, hydroelectric power, heat in the atmosphere, nuclear power, and the like. Of these, solar, solar heat, wind power, biomass, geothermal power, hydropower, and heat in the atmosphere belong to the major categories of electric power renewable energy. In addition, petroleum, coal, and liquefied natural gas belong to the major classification as fossil fuels. Renewable energy is an environmentally friendly energy source because it emits almost no _{CO 2} , which is a cause of global warming, compared to fossil fuel power generation. In this embodiment, solar power, solar heat, wind power, biomass, geothermal power, hydraulic power, or heat in the atmosphere is used as renewable energy. In addition, petroleum, coal, or liquefied natural gas is used as fossil fuel.

Furthermore, the intermediary Da conducts an intermediary business on behalf of the issuance of production method certificates by public institutions such as the national and local governments. In response to the issuance request from the application form E, the intermediary Da mediates the issuance of the production method certificate and provides the issued production method certificate to the applicant E. As a result, the applicant E can apply for a public subsidy based on, for example, the company's renewable energy utilization rate (CO ₂ reduction rate), etc., using the production method certificate.

The number of producers may be one or three or more. There may be multiple consumers and intermediaries.

<Network of power transmission and distribution>
The substation Bx is the nearest substation of the producers Aa and Ab, and the substation By is the nearest substation of the consumer Ca. The power transmission and distribution network 10 is constructed by substations Bx, By, transmission and distribution lines, and the like. The electric power provided by the producers Aa and Ab is provided to the consumer Ca via the power transmission and distribution network 10.

<Data communication network>
The producer Aa has a smartphone 2a, a smart meter 3a, and a power generation device 4a. The producer Ab has a smartphone 2b, a smart meter 3b, and a power generation device 4b. Consumer Ca has a smartphone 2c, a smart meter 3c, and an electric device 8. The intermediary Da manages the intermediary system 1000 composed of the intermediary server 5 and the certificate issuing server 6. This intermediary Da is a corporation or an individual (for example, an employee such as a president, an officer, or an IT manager). Applicant E has an image processing device 7.

The number of smartphones may be two or four or more, depending on the number of producers and consumers. Hereinafter, the generic names of the smartphones 2a, 2b, and 2c will be referred to as the smartphone 2. Further, the number of smart meters 3a, 3b, 3c may be two or four or more depending on the number of producers and consumers. Hereinafter, the generic names of the smart meters 3a, 3b, and 3c will be referred to as the smart meter 3. The number of power generation devices 4a and 4b may be one or three or more depending on the number of producers. Hereinafter, the generic names of the power generation devices 4a and 4b will be referred to as the power generation device 4.

Further, the intermediary system 1000 may be two or more depending on the number of intermediaries. Further, the intermediary server 5 and the certificate issuing server 6 may be constructed by a single computer or may be constructed by a plurality of computers. The number of electric devices 8 may be two or more, depending on the number of consumers.

As shown in FIG. 1, the trading system 1 as a network for data communication includes a plurality of smartphones 2a, 2b, 2c, a plurality of smart meters 3a, 3b, 3c, a plurality of power generation devices 4a, 4b, and image processing. It is constructed by a device 7, an intermediary system 1000, and nodes 9a, 9b, 9c, 9d such as a computer. Further, the blockchain network 90 is constructed by the nodes 9a, 9b, 9c, 9d. The blockchain network 90 is constructed in a communication network 100 such as the Internet. The communication network 100 is constructed by the Internet, a mobile communication network, a LAN (Local Area Network), or the like. The communication network 100 may include not only wired communication but also wireless communication networks such as mobile communication systems (4G, 5G, 6G, etc.) and WiMAX (Worldwide Interoperability for Microwave Access). Further, although there are originally a large number of nodes 9a, 9b, 9c, 9d, only four nodes are shown here for the convenience of space. Hereinafter, the generic names of the nodes 9a, 9b, 9c, and 9d will be referred to as the node 9. The node 9 is, for example, a smartphone, a tablet terminal, a mobile phone, a PC (Personal Computer), or the like.

Next, the terminals and devices of the producers Aa and Ab, the consumer Ca, the intermediary Da, and the applicant E will be described.

(Terminals and devices of producer Aa)
The smartphone 2a can perform data communication with the smart meter 3a by short-range wireless technology such as NFC (Near Field Communication) or Bluetooth (registered trademark). In addition, the smartphone 2a can perform data communication with the intermediary server 5 via the communication network 100.

The smart meter 3a can perform data communication with the intermediary server 5 via the communication network 100. Further, the smart meter 3a measures the amount of electric power provided by the power generation device 4a at regular time intervals (for example, every 30 minutes), and further indicates the amount of electric power provided and the owner and the like. Performs processing such as requesting node 9 of the blockchain network 90 to generate asset information.

The power generation device 4a is a device that uses sunlight to generate power.

(Terminals and devices of producer Ab)
The smartphone 2b can perform data communication with the smart meter 3b by short-range wireless technology such as NFC or Bluetooth (registered trademark). Further, the smartphone 2b can perform data communication with the intermediary server 5 via the communication network 100.

The smart meter 3b can perform data communication with the intermediary server 5 via the communication network 100. Further, the smart meter 3b measures the amount of electric power provided by the power generation device 4b at regular time intervals (for example, every 30 minutes), and further, the amount of electric power provided and the asset information indicating the owner, etc. Processing such as requesting the generation to the node 9 of the blockchain network 90 is performed.

The power generation device 4b is a device that uses petroleum to generate electricity.

(Terminals and devices of consumer Ca)
The smartphone 2c can perform data communication with the smart meter 3c by short-range wireless technology such as NFC or Bluetooth (registered trademark). Further, the smartphone 2c can perform data communication with the intermediary server 5 via the communication network 100.

The smart meter 3c can perform data communication with the intermediary server 5 via the communication network 100. In addition, the smart meter 3c measures the amount of power used by the electric device 8 at regular time intervals (for example, every 30 minutes), and further provides usage information indicating the amount of power used, the time used, and the like. , Sending to the intermediary server 5 via the communication network 100, and the like. In the present embodiment, since the intermediary server 5 accesses the blockchain network 90 instead of the smart meter 3c, the smart meter 3c does not need to access the blockchain network 90.

The electric device 8 is a device that is driven by using the electric power provided by the consumers Aa and Ab.

(Terminals and devices of mediator Da)
The intermediary system 1000 is composed of an intermediary server 5 and a certificate issuing server 6.
The mediation server 5 handles mediation of transactions related to assets such as transfer of asset information between an asset provider such as electric power and an asset user. Therefore, the intermediary server 5 can perform data communication with each smartphone 2 and each smart meter 3 via the communication network 100. Further, the intermediary server 5 can access the node 9 of the blockchain network 90 and perform data communication with the node 9. The certificate issuing server 6 processes the mediation of transactions related to the issuance of certificates for certifying the production method of assets such as electric power. Therefore, the certificate issuing server 6 can perform data communication with the image processing device 7 via the communication network 100. Further, the certificate issuing server 6 can access the node 9 of the blockchain network 90 and perform data communication with the node 9. The intermediary system 1000 may be, for example, a computer in which all or part of the functions of the intermediary server 5 and the certificate issuing server 6 are integrated.

(Terminal and device of applicant E)
The image processing device 7 is, for example, an image forming device having an image processing function such as an MFP (Multifunction Peripheral / Printer / Product), a facsimile, a scanner, or a printer, and a communication function. The image processing device 7 may be a portable handy printer, a handy scanner, or the like, as well as a device installed at a specific place.

(Supplement)
The smartphones 2a and 2b are examples of the communication terminals of the providers. The smartphone 2c is an example of a user's communication terminal. Communication terminals also include smart watches, PCs, smart glasses and the like. The smart meter 3 is an example of a measuring terminal. The image processing device 7 is an example of an information processing device.

[Hardware configuration]
Subsequently, the hardware configurations of the smartphone 2, the smart meter 3, the mediation server 5, the certificate issuing server 6, the image processing device 7, and the node 9 will be described with reference to FIGS. 2 to 5.

<Smartphone hardware configuration>
FIG. 2 is a hardware configuration diagram of a smartphone. As shown in FIG. 2, the smartphone 2 includes a CPU 201, ROM 202, RAM 203, EEPROM 204, CMOS sensor 205, image sensor I / F 206, acceleration / orientation sensor 207, media I / F 209, and GPS receiver 211. There is.

Of these, the CPU 201 controls the operation of the entire smartphone 2. The ROM 202 stores a program used to drive the CPU 201 such as the CPU 201 and the IPL. The RAM 203 is used as a work area of the CPU 201. The EEPROM 204 reads or writes various data such as a smartphone program under the control of the CPU 201. The CMOS (Complementary Metal Oxide Semiconductor) sensor 205 is a kind of built-in imaging means for acquiring image data by imaging a subject (mainly a self-portrait) under the control of the CPU 201. Instead of a CMOS sensor, it may be an imaging means such as a CCD (Charge Coupled Device) sensor. The image sensor I / F 206 is a circuit that controls the drive of the CMOS sensor 205. The acceleration / orientation sensor 207 is various sensors such as an electronic magnetic compass, a gyro compass, and an acceleration sensor that detect the geomagnetism. The media I / F 209 controls reading or writing (storage) of data to a recording medium 208 such as a flash memory. The GPS receiving unit 211 receives GPS signals from GPS satellites.

Further, the smartphone 2 includes a long-distance communication circuit 212, a CMOS sensor 213, an image sensor I / F214, a microphone 215, a speaker 216, a sound input / output I / F217, a display 218, an external device connection I / F (Interface) 219, and near field communication. It includes a range communication circuit 220, an interface 220a of the short range communication circuit 220, and a touch panel 221.

Of these, the long-distance communication circuit 212 is a circuit that communicates with other devices via the communication network 100. The CMOS sensor 213 is a kind of built-in imaging means for capturing an image of a subject and obtaining image data under the control of the CPU 201. The image sensor I / F 214 is a circuit that controls the drive of the CMOS sensor 213. The microphone 215 is a built-in circuit that converts sound into an electric signal. The speaker 216 is a built-in circuit that converts an electric signal into physical vibration to produce sounds such as music and voice. The sound input / output I / F 217 is a circuit that processes sound signal input / output between the microphone 215 and the speaker 216 under the control of the CPU 201. The display 218 is a kind of display means such as a liquid crystal or an organic EL (Electro Luminescence) for displaying an image of a subject, various icons, and the like. The external device connection I / F 219 is an interface for connecting various external devices. The short-range communication circuit 220 is a communication circuit such as NFC (Near Field Communication) or Bluetooth (registered trademark). The touch panel 221 is a kind of input means for operating the smartphone 2 by the user pressing the display 218.

Further, the smartphone 2 is provided with a bus line 210. The bus line 210 is an address bus, a data bus, or the like for electrically connecting each component such as the CPU 201 shown in FIG.

<Hardware configuration of smart meter>
FIG. 3 is a hardware configuration diagram of the smart meter. As shown in FIG. 3, the smart meter 3 is equipped with a computer, and as shown in FIG. 3, the CPU 301, ROM 302, RAM 303, NVRAM 304, display 306, measurement sensor 307, and switch 308. , Network I / F309, keypad 311, touch panel 312, short-range communication circuit 220, and antenna 220a of the short-range communication circuit 220.

Of these, the CPU 301 controls the operation of the entire smart meter 3. The ROM 302 stores a program used to drive the CPU 301 such as an IPL. The RAM 303 is used as a work area of the CPU 301. NVRAM (Non-Volatile RAM) 304 is a non-volatile memory that stores and reads various data such as programs. The display 306 displays various information such as a cursor, a menu, a window, a character, or an image.

The measurement sensor 307 measures the power provided or used. The switch 308 turns on (closes) or cuts (opens) an electric circuit to conduct or stop electricity.

The network I / F 309 is an interface for performing data communication using a communication network 100 such as the Internet including the blockchain network 90. The keypad 311 is a kind of input means including a plurality of keys for inputting or selecting characters, numerical values, various instructions, and the like. The short-range communication circuit 320 is a communication circuit that realizes short-range wireless technology such as NFC and Bluetooth (registered trademark). The bus line 310 is an address bus, a data bus, or the like for electrically connecting each component such as the CPU 301 shown in FIG.

<Hardware configuration of intermediary server>
FIG. 4 is a hardware configuration diagram of the intermediary server. Each hardware configuration of the intermediary server 5 is indicated by a code in the 500 series. As shown in FIG. 4, the intermediary server 5 is constructed by a computer, and as shown in FIG. 4, the CPU 501, the ROM 502, the RAM 503, the HD (Hard Disk) 504, and the HDD (Hard Disk Drive). ) Controller 505, Display 506, External Device Connection I / F (Interface) 508, Network I / F 509, Bus Line 510, Keyboard 511, Pointing Device 512, DVD-RW (Digital Versatile Disk Rewritable) Drive 514, Media I / F 516 It has.

Of these, the CPU 501 controls the operation of the entire intermediary server 5. The ROM 502 stores a program used to drive the CPU 501 such as an IPL. The RAM 503 is used as a work area of the CPU 501. The HD504 stores various data such as programs. The HDD controller 505 controls reading or writing of various data to the HD 504 according to the control of the CPU 501. The display 506 displays various information such as cursors, menus, windows, characters, or images. The external device connection I / F 508 is an interface for connecting various external devices. The external device in this case is, for example, a USB (Universal Serial Bus) memory, a printer, or the like. The network I / F 509 is an interface for performing data communication using the communication network 100. The bus line 510 is an address bus, a data bus, or the like for electrically connecting each component such as the CPU 501 shown in FIG.

Further, the keyboard 511 is a kind of input means including a plurality of keys for inputting characters, numerical values, various instructions and the like. The pointing device 512 is a kind of input means for selecting and executing various instructions, selecting a processing target, moving a cursor, and the like. The DVD-RW drive 514 controls reading or writing of various data to the DVD-RW 513 as an example of the removable recording medium. In addition, it is not limited to DVD-RW, and may be DVD-R, Blu-ray (registered trademark) Disc (Blu-ray disc), or the like. The media I / F 516 controls reading or writing (storage) of data to a recording medium 515 such as a flash memory.

<Hardware configuration of certificate issuing server>
FIG. 4 is a hardware configuration diagram of the certificate issuing server. Each hardware configuration of the certificate issuing server 6 is indicated by a code in the 600 series in parentheses. As shown in FIG. 4, the certificate issuing server 6 is constructed by a computer and has the same configuration as the intermediary server 5 as shown in FIG. 4, so that each hardware is provided. The description of the configuration will be omitted.

<Hardware configuration of node>
FIG. 4 is a hardware configuration diagram of the node. Each hardware configuration of node 9 is indicated by a code in the 900s in parentheses. As shown in FIG. 4, the node 9 is constructed by a computer and has the same configuration as the intermediary server 5 as shown in FIG. 4, so that the description of each hardware configuration will be described. Is omitted.

<Hardware configuration of image processing device>
FIG. 5 is a hardware configuration diagram of the image processing device. As shown in FIG. 5, the image processing device 7 includes a controller 710, a short-range communication unit 720, an engine control unit 730, an operation panel 740, and a network I / F 750. Of these, the controller 710 is the CPU 701, which is the main part of the computer, the system memory (MEM-P) 702, the north bridge (NB) 703, the south bridge (SB) 704, the ASIC (Application Specific Integrated Circuit) 706, and the storage area. It has a local memory (MEM-C) 707, an HDD controller 708, and an HD709 storage area, and has a configuration in which the NB 703 and the ASIC 706 are connected by an AGP (Accelerated Graphics Port) bus 721.

Of these, the CPU 701 is a control unit that controls the entire image processing device 7. The NB703 is a bridge for connecting the CPU 701, the MEM-P702, SB704, and the AGP bus 721, and connects a memory controller that controls reading and writing to the MEM-P702, a PCI (Peripheral Component Interconnect) master, and an AGP target. Have. The MEM-P702 includes a ROM 702a, which is a memory for storing programs and data that realizes each function of the controller 710, and a RAM 702b, which is used as a memory for developing programs and data, and a memory for drawing at the time of memory printing. The SB704 is a bridge for connecting the NB703, the PCI bus 722, and peripheral devices. The ASIC 706 is an IC (Integrated Circuit) for image processing applications having hardware elements for image processing, and has a role of a bridge connecting the AGP bus 721, the PCI bus 722, the HDD controller 708, and the MEM-C707, respectively. The ASIC 706 is a PCI target and an AGP master, an arbiter (ARB) that forms the core of the ASIC 706, a memory controller that controls the MEM-C707, and a plurality of DMACs (Direct Memory Access Controllers) that rotate image data by hardware logic and the like. , And a PCI unit that transfers data between the scanner unit 731 and the printer unit 732 via the PCI bus 722. A USB interface or an IEEE 1394 (Institute of Electrical and Electronics Engineers 1394) interface may be connected to the ASIC 706.

The MEM-C707 is a local memory used as a copy image buffer and a code buffer. The HD709 is a storage for accumulating image data, accumulating font data used at the time of printing, and accumulating forms. The HDD controller 708 controls reading or writing of data to the HD709 according to the control of the CPU 701. The AGP bus 721 is a bus interface for a graphics accelerator card proposed for speeding up graphic processing, and the graphics accelerator card can be speeded up by directly accessing the MEM-P702 with high throughput. .. Further, the short-range communication unit 720 is provided with a short-range communication circuit 720a and an antenna 720b of the short-range communication circuit 720a. The short-range communication circuit 720a is a communication circuit for short-range wireless communication such as NFC (Near Field Communication), Bluetooth (registered trademark), millimeter-wave wireless communication, QR code (registered trademark), visible light, environmental sound, or ultrasonic waves. is there.

Further, the engine control unit 730 is composed of a scanner unit 731 and a printer unit 732. The scanner unit 731 or the printer unit 732 includes an image processing portion such as error diffusion and gamma conversion. Further, the operation panel 740 displays the current setting value, the selection screen, and the like, and displays the panel display unit 740a such as a touch panel that accepts the input from the operator, and the setting value of the image formation condition such as the density setting condition. It is provided with an operation unit 740b including a numeric keypad for receiving and a start key for receiving a copy start instruction. The panel display unit 740a is a kind of display unit. The controller 710 controls the entire image processing device 7, and controls, for example, drawing, communication, input from the operation panel 740, and the like. Further, the network I / F750 is an interface for performing data communication using the communication network 100. The short-range communication circuit 720a and the network I / F750 are electrically connected to the ASIC 706 via the PCI bus 722.

Each of the above programs may be a file in an installable format or an executable format, and may be recorded and distributed on a computer-readable recording medium. Examples of recording media include CD-R (Compact Disc Recordable), DVD (Digital Versatile Disk), Blu-ray Disc, SD card, USB memory and the like. In addition, the recording medium can be provided domestically or internationally as a program product. For example, the node 9 according to the embodiment realizes the processing method according to the present invention by executing the program according to the present invention.

[Functional configuration]
Subsequently, the functional configuration of each terminal and device for constructing the trading system 1 will be described with reference to FIGS. 6 to 8. FIG. 6 is a functional block diagram of a smartphone and a smart meter in the trading system.

<Functional configuration of smartphone 2a>
As shown in FIG. 6, the smartphone 2a has a transmission / reception unit 21a, a reception unit 22a, a display control unit 24a, a communication unit 28a, and a storage / reading unit 29a. Each of these parts is a function or means realized by operating any of the components shown in FIG. 2 by a command from the CPU 201 according to a program for a smartphone developed on the RAM 203 from the EEPROM 204. is there.

Further, the smartphone 2a has a storage unit 2000a constructed by the ROM 202, the RAM 203, and the EEPROM 204 shown in FIG.

(Each function configuration of smartphone 2a)
The transmission / reception unit 21a of the smartphone 2a is mainly realized by the processing of the CPU 201 with respect to the long-distance communication circuit 212, and various data (or information) with other devices (for example, the intermediary server 5) via the communication network 100. ) Is sent and received.

The reception unit 22a is mainly realized by processing the CPU 201 on the touch panel 221 and receives various selections or inputs from the user.

The display control unit 24a is mainly realized by the processing of the CPU 201, and causes the display 218 to display various images. The display control unit 24a also includes a web browser function.

The communication unit 28a is mainly realized by processing the CPU 201 with respect to the short-range communication circuit 220, and communicates various data with the communication unit 38a described later of the smart meter 3a. In the case of wired communication, data is communicated by connecting the smart meter 3a and a communication cable.

The storage / reading unit 29a is mainly realized by the processing of the CPU 201, and stores various data (or information) in the storage unit 2000a and reads various data (or information) from the storage unit 2000a.

<Functional configuration of smartphone 2c>
As shown in FIG. 6, the smartphone 2c has a transmission / reception unit 21c, a reception unit 22c, a display control unit 24c, a communication unit 28c, and a storage / reading unit 29c. Each of these parts is a function or means realized by operating any of the components shown in FIG. 2 by a command from the CPU 201 according to a program for a smartphone developed on the RAM 203 from the EEPROM 204. is there.

Further, the smartphone 2c has a storage unit 2000c constructed by the ROM 202, the RAM 203, and the EEPROM 204 shown in FIG.

Each part of the smartphone 2c (transmission / reception unit 21c, reception unit 22c, display control unit 24c, communication unit 28c, and storage / reading unit 29c) is each part of the smartphone 2a (transmission / reception unit 21a, reception unit 22a, display control unit). Since the functions are the same as those of 24a, the communication unit 28a, and the storage / reading unit 29a), the description thereof will be omitted. Further, the smartphone 2b has the same parts as the smartphone 2a like the smartphone 2c, but will be omitted in FIG. 5 because it will not be described in the processing described later.

<Functional configuration of smart meter 3a>
As shown in FIG. 6, the smart meter 3a includes a transmission / reception unit 31a, a measurement unit 33a, a display control unit 34a, a communication unit 38a, and a storage / reading unit 39a. Each of these parts is a function or means realized by operating any of the components shown in FIG. 3 by a command from the CPU 301 according to a program for a smart meter developed on the RAM 303 from the NVRAM 304. Is.

Further, the smart meter 3a has a storage unit 3000a constructed by the ROM 302, the RAM 303, and the NVRAM 304 shown in FIG.

(Each function configuration of smart meter 3a)
The transmission / reception unit 31a of the smart meter 3a is realized mainly by the processing of the CPU 301 with respect to the network I / F 309, and various data (or information) with other devices (for example, the intermediary server 5) via the communication network 100. ) Is sent and received.

The measuring unit 33a is realized mainly by the processing of the CPU 301 with respect to the measuring sensor 307, and measures the amount of electric power provided by the power generation device 4a.

The display control unit 34a is mainly realized by the processing of the CPU 301, and causes the display 306 to display various images.

The communication unit 38a is mainly realized by processing the CPU 301 with respect to the short-range communication circuit 320, and communicates various data with the communication unit 28a of the smartphone 2a. In the case of wired communication, data is communicated by connecting the smart meter 3a and a communication cable.

The storage / reading unit 39a is mainly realized by the processing of the CPU 301, and stores various data (or information) in the storage unit 3000a and reads various data (or information) from the storage unit 3000a.

<Functional configuration of smart meter 3c>
As shown in FIG. 6, the smart meter 3c has a transmission / reception unit 31c, a measurement unit 33c, a display control unit 34c, a communication unit 38c, and a storage / reading unit 39c. Each of these parts is a function or means realized by operating any of the components shown in FIG. 3 by a command from the CPU 301 according to a program for a smart meter developed on the RAM 303 from the NVRAM 304. Is.

Further, the smart meter 3a has a storage unit 3000c constructed by the ROM 302, the RAM 303, and the NVRAM 304 shown in FIG.

Each part of the smart meter 3c (transmission / reception unit 31c, measurement unit 33c, display control unit 34c, communication unit 38c, and storage / reading unit 39c) is a part of the smart meter 3a (transmission / reception unit 31a, measurement unit 33a, display). Since the functions are the same as those of the control unit 34a, the communication unit 38a, and the storage / reading unit 39a), the description thereof will be omitted. Further, the smart meter 3b has the same parts as the smart meter 3a like the smart meter 3c, but it is omitted in FIG. 6 because it will not be described in the process described later.

<Functional configuration of intermediary server 5>
FIG. 7 is a functional block diagram of an intermediary server, a certificate issuing server, and a node in the trading system. As shown in FIG. 7, the intermediary server 5 includes a transmission / reception unit 51, a determination unit 53, a display control unit 54, a determination unit 55, and a storage / reading unit 59. Each of these parts is a function or means realized by any of the components shown in FIG. 4 being expanded from HD 504 onto RAM 503 and operated by an instruction from CPU 501 according to a program for an intermediary server. is there.

Further, the intermediary server 5 has a ROM 502 shown in FIG. 4 and a storage unit 5000 constructed by the HD 504.

(User management table)
FIG. 9A is a conceptual diagram showing a user management table. The user management table is a table for the intermediary Da to manage each user such as an electric power consumer. In the storage unit 5000, a user management DB 5001 configured by a user management table as shown in FIG. 9A is constructed. In this user management table, a user ID, a user name, a user's address (or whereabouts), and a selectable provider ID are managed in association with each other.

Of these, the user ID is an example of user identification information for identifying the user of an asset such as the electric power consumer Ca. The selectable provider ID is an example of provider identification information for identifying a provider such as a producer that can be selected by the user indicated by the user ID. For example, if the user's address is in Tokyo, the providers that can be selected are limited to those that have addresses in and around Tokyo.

(Provider management table)
FIG. 9B is a conceptual diagram showing a provider management table. The provider management table is a table for the intermediary Da to manage each provider such as an electric power producer. In the storage unit 5000, a provider management DB 5002 configured by a provider management table as shown in FIG. 9B is constructed. In this provider management table, the provider ID, the provider name, the type of asset production method such as electric power by the provider, and the amount that can be provided are associated and managed.

Of these, the provider ID is an example of provider identification information for identifying the provider of assets such as electric power producers. The type of production method indicates the type of energy used to produce the asset. As described above, examples of the production method include a method of producing using solar power, wind power, biomass, geothermal power, hydroelectric power, petroleum, coal, liquefied natural gas, nuclear power, and the like. The type of production method may be broadly classified as electric power renewable energy or fossil fuel. The amount that can be provided is the amount of assets that a provider such as a producer can provide in a certain period (or a certain time), for example, the amount of electric power (kWh).

(Transaction content management table)
FIG. 10A is a conceptual diagram showing a transaction content management table. The transaction content management table is a table for managing the transaction content of the asset set by the user such as consumer Ca. In the storage unit 5000, a transaction content management DB 5003 configured by a transaction content management table as shown in FIG. 10A is constructed. In this transaction content management table, transaction content information is managed. Specifically, the user ID, the start date of use, the end date of use, the planned amount of use, the renewable energy utilization rate, the provider ID, and the provider name. , And the type of production method are associated and managed. The same item names as those in FIGS. 9A and 9B, such as the user ID, have the same meaning.

Of these, the use start date is information indicating the date when a user such as consumer Ca starts using assets such as electric power. The end-of-use date is information indicating the date when the user ends the use of assets such as electric power. The planned usage amount is the amount of assets that the user plans to use for a certain period (or a certain time), for example, the electric power amount (kWh). The renewable energy utilization rate is information indicating the ratio (%) of assets produced by using renewable energy such as sunlight among assets such as electric power used by users such as consumers Ca.

(Transaction history management table)
FIG. 10B is a conceptual diagram showing a transaction history management table. The transaction history management table is a table for managing the transaction history in which the intermediary server 5 mediates the transactions related to the assets acquired from the provider such as the producer for each user. In the storage unit 5000, a transaction history management DB 5004 configured by a transaction history management table as shown in FIG. 10B is constructed. In this transaction history management table, transaction history information is managed, and specifically, the brokerage date and time, the transaction amount, the type of production method, and the total transaction amount by various production methods are managed in association with each other. In other words, the type of (energy) resource used for the production of an asset is, in other words, the "type of production method" for producing an asset using a predetermined type of resource. Further, although the case where solar power and petroleum are used as various production methods is shown here, the production method is not limited to this, and the production method using air volume, coal or the like may be managed. You may also manage a broad classification of production method types that indicate electricity renewable energy and fossil fuels.

Among the transaction history information, the same item names as those in FIGS. 9A and 9B, such as the user ID, have the same meaning. The mediation date and time indicates the date and time when the ownership of the asset is mediated by the mediation server 5 assigning the ownership of the asset acquired from the provider such as the producer to the user such as the consumer Ca. The transaction amount indicates the transaction amount of the asset that the intermediary server 5 acquires from the provider and mediates the transaction to the user, and is represented by, for example, the electric power amount (kWh). The total transaction volume indicates the total amount of assets produced by a specific type of production method allocated to users such as consumer Ca for a certain period (or a certain period of time), and is shown, for example, in total electric energy (kWh). Is done. The intermediary server 5 determines the type of the asset production method to be allocated to the user such as the consumer Ca with reference to the transaction history management DB 5004. From this, for example, when the ratio of the electric power produced by the consumer Ca using the renewable energy is set to 40, the intermediary server 5 refers to the total transaction volume of the transaction history management DB 5004, and then Determine the type of production method of assets to be provided to consumer Ca. Since the planned usage amount (for example, 20kWh) shown in FIG. 10A is the planned usage amount every hour, the transaction volume is planned to be used when the asset information is transferred every 30 minutes. It will be half the amount (for example, 10kWh).

Further, although the case where solar power and petroleum are used as various production methods is shown here, the production method is not limited to this, and the production method using air volume, coal or the like may be managed. You may also manage a broad classification of production method types that indicate renewable energy and fossil fuels. Furthermore, the type of production method also includes the type of asset production process. The type of asset production process indicates a case where the process until the asset such as electric power is produced is different. As an example, even when the same resource, the sun, is used, a method of producing electric power by using sunlight, a method of producing electric power by using solar heat, and the like are included. Further, as another example of the type of asset production process, a method of producing electric power using a turbine, a method of producing electric power without using a turbine, and the like are included.

(Each function configuration of the intermediary server 5)
Next, each functional configuration of the intermediary server 5 will be described in detail with reference to FIG. 7. The transmission / reception unit 51 of the intermediary server 5 is mainly realized by the processing of the CPU 501 for the network I / F 509, and various data (or various data (or, for example, smartphones 2a, 2c)) are exchanged with other terminals (for example, smartphones 2a, 2c) via the communication network 100. Information) is sent and received. The transmission / reception unit 51 also serves as a reception unit that receives the transaction details described later from the smartphone 2c.

The determination unit 53 determines the asset information indicating the ownership of the asset, which is realized by the processing of the CPU 501 and is transferred to the user (intermediates the transaction). For example, the determination unit 53 has "transaction history of assets produced by a predetermined type of production method by the user" managed by the transaction history management DB 5004 and "renewable" managed in advance by the transaction content management DB 5003. Based on the "energy utilization rate", the asset information related to the assets produced by a specific type of production method that mediates the transaction to the user such as consumer Ca is determined. Specifically, when the consumer Ca sets the utilization rate of renewable energy to 40 (%), the determination unit 53 refers to the total transaction volume of the transaction history management DB 5004 and uses the utilization rate of 40 (%). ), The consumer Ca decides to change the owner of the asset information related to the assets produced by renewable energy from the intermediary Da that manages the intermediary server 5 to the consumer Ca. ..

The display control unit 54 is mainly realized by the processing of the CPU 501, and causes the display 506 to display various images, or causes the display 218 of the smartphone 2 to display various images via the communication network 100. In this case, the smartphone 2 displays various images by the function of the web browser of the display control unit 24 of the smartphone 2. The display control unit 24 is a general term for the display control units 24a and 24c.

The determination unit 55 is realized by the processing of the CPU 501 and makes various determinations.

The storage / reading unit 59 is mainly realized by the processing of the CPU 501, stores various data (or information) in the storage unit 5000, and reads various data (or information) from the storage unit 5000.

<Functional configuration of certificate issuing server 6>
As shown in FIG. 7, the certificate issuing server 6 has a transmission / reception unit 61, an authentication unit 62, a generation unit 63, a certificate type management unit 64, a judgment unit 65, and a storage / reading unit 69. There is. Each of these parts has a function realized by any of the components shown in FIG. 4 being expanded from HD 604 on RAM 603 and operated by an instruction from CPU 601 according to a program for a certificate issuing server. It is a means.

Further, the certificate issuing server 6 has a ROM 602 shown in FIG. 4 and a storage unit 6000 constructed by the HD 604.

(Applicant management table)
FIG. 11A is a conceptual diagram showing an applicant management table. The applicant management table is a table for the intermediary Da to manage the applicant of the production method certificate. In the storage unit 6000, an applicant management DB 6001 composed of an applicant management table as shown in FIG. 11A is constructed. In this applicant management table, a user name, an applicant ID, a password, and a selectable user key are associated and managed.

Of these, the applicant ID and password are examples of the applicant identification information for identifying the applicant who applies for the issuance of the production method certificate. In the application form management table, a plurality of applicant IDs are associated with one user name. Here, the applicant is, for example, a user who has the authority to apply for a production method certificate among the members of a trader who is a producer or a consumer of electric power. The applicant ID may be configured so that only one is associated with one user name. Further, the user key is key information for the applicant to issue a production method certificate using the blockchain network 90.

(Certificate type management table)
FIG. 11B is a conceptual diagram showing a certificate type management table. The certificate type management table is a table for managing the format of certificates issued by the national and local public institutions. In the storage unit 6000, a certificate type management DB 6002 configured by a certificate type management table as shown in FIG. 11B is constructed. In this certificate type management table, the name of the institution indicating the issuing authority of the certificate and the format of the certificate issued by the issuing institution are associated and managed.

The intermediary Da shall be approved in advance by the issuing agency of the certificate such as the national government. The intermediary Da manages the format of the certificate approved for each issuing institution by using the certificate type management table.

(Each function configuration of certificate issuing server 6)
Next, each functional configuration of the certificate issuing server 6 will be described in detail with reference to FIG. 7. The transmission / reception unit 61 of the certificate issuing server 6 is mainly realized by the processing of the CPU 601 for the network I / F 609, and is communicated with another device or terminal (for example, the image processing device 7) via the communication network 100. Send and receive various data (or information). The transmission / reception unit 61 also serves as a reception unit that receives a certificate issuance request described later from the image processing device 7.

The authentication unit 62 performs the authentication process of the applicant E who requests the issuance of the production method certificate based on the issuance request information received by the transmission / reception unit 61, which is realized by the processing of the CPU 601.

The generation unit 63 is realized by the processing of the CPU 601 and generates the production method certificate to be provided to the applicant E based on the transaction information and the asset information.

The certificate type management unit 64 is mainly realized by the processing of the CPU 601 and manages the format of the certificate for each issuing institution that issues the production method certificate.

The determination unit 65 is realized by the processing of the CPU 601 and makes various determinations.

The storage / reading unit 69 is mainly realized by the processing of the CPU 601 and stores various data (or information) in the storage unit 6000 and reads various data (or information) from the storage unit 6000.

<Functional configuration of node 9>
As shown in FIG. 7, the node 9 has a transmission / reception unit 91, a verification unit 92, a determination unit 93, a transaction processing unit 94, an asset processing unit 95, and a storage / reading unit 99. Each of these parts is a function or means realized by any of the components shown in FIG. 4 being expanded from the HD 904 on the RAM 903 and operated by an instruction from the CPU 901 according to the program for the node. ..

Further, the node 9 has a ROM 902 shown in FIG. 4 and a storage unit 9000 constructed by the HD 904. FIG. 7 shows, as an image, a state in which transaction information is connected like a chain. In addition, the asset information generated based on the transaction information is also stored. Each transaction information and each asset information is held in each node.

(Each function configuration of node 9)
Next, each functional configuration of the node 9 will be described in detail with reference to FIG. 7. The transmission / reception unit 91 of the node 9 is mainly realized by the processing of the CPU 901 for the network I / F 909, and transmits / receives various data (or information) to / from other nodes of the blockchain network 90 in the communication network 100. .. The transmission / reception unit 91 also transmits / receives various data (or information) between the transmission / reception unit 31a of the smart meter 3a and the transmission / reception unit 51 of the intermediary server 5. Although the smart meter 3b is not shown in FIG. 7, the transmission / reception unit 91 actually transmits / receives various data (or information) to / from the smart meter 3b.

The verification unit 92 is realized by the processing of the CPU 901 and verifies the certificate and the provided information). The certificate verification is a process of determining whether or not the certificate is the certificate of the person who is registered in advance in the node 9. The verification of the provided information is a process of determining whether or not all the predetermined formats and contents (for example, whether the provider has been input or the provision time has been input) have been input.

The determination unit 93 is realized by the processing of the CPU 901 and makes various determinations.

The transaction processing unit 94 performs processing such as generating transaction information that is realized by processing of the CPU 901 and used for generating asset information and storing it in the storage unit 9000.

The asset processing unit 95 is realized by the processing of the CPU 901, and performs processing such as generating asset information and storing it in the storage unit 9000 according to the transaction information.

The storage / reading unit 99 is mainly realized by the processing of the CPU 901, and stores various data (or information) in the storage unit 9000 and reads various data (or information) from the storage unit 9000.

<Functional configuration of image processing device 7>
FIG. 8 is a functional block diagram of the image processing device in the trading system. As shown in FIG. 8, the image processing device 7 includes a transmission / reception unit 71, a reception unit 72, a display control unit 73, a determination unit 74, a print processing unit 75, and a storage / reading unit 79. Each of these parts has a function realized by operating any of the components shown in FIG. 5 by a command from the CPU 701 according to a program for an image processing device developed on the RAM 702b from the HD 709. It is a means.

Further, the image processing device 7 has a ROM 702a shown in FIG. 5 and a storage unit 7000 constructed by the HD709.

(Each functional configuration of the image processing device 7)
Next, each functional configuration of the image processing apparatus 7 will be described in detail with reference to FIG. The transmission / reception unit 71 of the image processing device 7 is mainly realized by processing the CPU 701 with respect to the network I / F 909, and transmits / receives various data (or information) to / from the certificate issuing server 6 via the communication network 100. Do.

The reception unit 72 is mainly realized by the processing of the CPU 701 on the operation panel 740, and receives various selections or inputs from the user.

The display control unit 73 is mainly realized by the processing of the CPU 701, and causes the operation panel 740 to display various images. The display control unit 73 uses, for example, a web browser function to display a web page created by HTML (HyperText Markup Language) or the like on the operation panel 740.

The determination unit 74 is realized by the processing of the CPU 701 and makes various determinations.

The print processing unit 75 is mainly realized by the processing of the CPU 701 with respect to the engine control unit 730, and executes the printing process of the image data.

The storage / reading unit 79 is mainly realized by the processing of the CPU 701, and stores various data (or information) in the storage unit 7000 and reads various data (or information) from the storage unit 7000.

[Processing or operation]
Subsequently, the process or operation of the present embodiment will be described with reference to FIGS. 12 to 24.

<Intermediary registration process>
First, the registration process of the intermediary will be described with reference to FIGS. 12 and 13. FIG. 12 is a sequence diagram showing the registration process of the intermediary. FIG. 13A is a diagram showing a display example of the intermediary registration screen, and FIG. 13B is a diagram showing a display example of the intermediary registration completion screen. Here, a case where the producer Aa registers the intermediary Da among a plurality of intermediaries will be described. An application for registering an intermediary is pre-installed on the smartphone 2a. In this application, an intermediary ID for identifying each intermediary, an intermediary name, and an IP address of an intermediary server owned by the intermediary are associated and managed.

As shown in FIG. 12, in the smartphone 2a, the display control unit 24a displays the intermediary registration screen shown in FIG. 13A on the display 218 (S21). On this intermediary registration screen, a pull-down menu showing each intermediary name is displayed in order to select a specific intermediary. In addition, at the bottom of the intermediary registration screen, an "OK" button that is pressed to confirm the intermediary name selected in the pull-down menu and a "CANCEL" button that is pressed to cancel the selection are displayed. ing.

Then, when the producer Aa selects a desired mediator name from the plurality of mediator names and presses the "OK" button, the reception unit 22a accepts the mediator's selection (S22). Here, the case where the intermediary Da is selected will be described.

After the reception unit 22a accepts the selection, the communication unit 28a transmits the intermediary information to the communication unit 38a of the smart meter 3a by short-range wireless communication (S23). This intermediary information includes an intermediary ID for identifying the selected intermediary and an IP address of an intermediary server owned by the selected intermediary. As a result, the communication unit 38a of the smart meter 3a receives the intermediary information.

Next, in the smart meter 3a, the storage / reading unit 39a registers the mediator information in the storage unit 3000a. Then, the communication unit 38a transmits the registration completion information indicating that the registration is completed to the smartphone 2a. As a result, the communication unit 28a of the smartphone 2a receives the registration completion information.

Next, in the smartphone 2a, the display control unit 24a displays the registration completion screen as shown in FIG. 13B on the display 218. On this registration completion screen, a comment indicating that the registration of the intermediary has been completed is displayed. Further, on this registration completion screen, an "OK" button that is pressed when the screen is closed is displayed, and when the producer Aa presses the button, the registration completion screen is closed.

With the above, the registration process of the intermediary is completed.

<Registration process of transaction details>
Subsequently, the registration process of the transaction content of the asset will be described with reference to FIGS. 14 and 15. FIG. 14 is a sequence diagram showing the registration process of the transaction content of the asset. FIG. 15A is a diagram showing a display example of the transaction content registration screen before input and selection, and FIG. 15B is a diagram showing a display example of the transaction content registration screen after input and selection. Here, a case where the consumer Ca registers the transaction content of electric power as an asset to the intermediary server 5 using the smartphone 2c will be described.

As shown in FIG. 14, the transmission / reception unit 21c of the smartphone 2c transmits a display request of the transaction content registration screen to the intermediary server 5 via the communication network 100 (S41). This display request includes a user ID for identifying the consumer Ca as the user who is the request source. As a result, the transmission / reception unit 51 of the intermediary server 5 receives the display request. The user ID is an example of user identification information. The user identification information includes my number, which is a number designated by a local public body as an individual identification number in Japan, and a telephone number of an individual or a company.

Next, in the intermediary server 5, the storage / reading unit 59 searches the user management DB 5001 (see FIG. 9A) using the user ID received in step S41 as a search key, so that the corresponding selection can be made. Read all provider IDs (S42). Further, the storage / reading unit 59 searches the provider management DB 5002 using each provider ID read in step S42 as an inspection key, so that each corresponding information (provider name, production method type information, and provideable amount) is searched. ) Is read (S43). Then, the display control unit 54 creates a transaction content registration screen as shown in FIG. 15A by using each information read in step S43 (S44). As a result, in the smartphone 2c, the display control unit 24c uses the web browser function to display the transaction content registration screen shown in FIG. 15A created by the intermediary server 5 on the display 218 of the smartphone 2c (S45). .. On this transaction content registration screen, each input field (the usage period date of the asset (in this case, electric power), the end date of the asset usage, the planned usage amount of the asset, and the renewable energy utilization rate), and the provider of the asset There are multiple checkboxes for selecting. In addition, at the bottom of the transaction content registration screen, there is an "OK" button that is pressed when entering the input field and confirming the checked transaction content in the check box, and pressing when canceling without confirming the transaction content. The "CANCEL" button to be displayed is displayed.

Here, the consumer Ca inputs a desired numerical value in each input field by operating the touch panel of the smartphone 2c, further checks the check box of the desired provider, and presses the "OK" button. Then, the reception unit 22c accepts the input and selection of the transaction content (S46). The renewable energy utilization rate indicates the ratio of renewable energy used to the energy used for the production of electric power that the consumer Ca wants to acquire.

Here, consumer Ca selects producer Aa, which uses sunlight to produce electricity as the energy used for production, but since electricity is not provided at night, it is decided to replace it with other energy. In consideration, producer Ab, which produces electricity using oil, has been selected. And the renewable energy utilization rate is set to 40%.

Next, the transmission / reception unit 21c of the smartphone 2c transmits the transaction content information indicating the input and selected content to the intermediary server 5 via the communication network 100 (S47). As a result, the transmission / reception unit 51 of the intermediary server 5 receives the transaction content by receiving the transaction content information.

Next, in the intermediary server 5, the storage / reading unit 59 associates the transaction content management DB 5003 (see FIG. 10A) with the transaction content information received in step S47 together with the user ID received in step S41. It is managed by memorizing it (S48).

This completes the transaction content registration process.

<Process to set the owner of the asset as an intermediary>
Subsequently, the process of setting the owner of the assets provided by the provider as an intermediary will be described with reference to FIGS. 16 and 17. FIG. 16 is a sequence diagram showing a process of setting the owner of the assets provided by the provider as an intermediary. FIG. 17 is a conceptual diagram of transaction information and asset information. Here, a case where the smart meter 3a of the producer Aa sets the owner of the asset as an intermediary for the node 9a will be described.

As shown in FIG. 16, the measuring unit 33a measures the power supplied from the power generation device 4a to the power transmission and distribution network 10 (S61). Then, the transmission / reception unit 31a of the smart meter 3a transmits a request for asset information generation to the node 9a of the blockchain network 90 once at a predetermined time (for example, 30 minutes) (S62). In response to this request, an electronic certificate certifying that the producer Aa as the provider is the person himself / herself so that the smartphone 2a of the producer Aa who is the provider can access the blockchain network 90. And the information provided is included. The provided information includes information on the provider, the date and time of provision, the (tradable) quantity, the type of production method, and the owner of the asset. As a result, the transmission / reception unit 91 of the node 9a receives the request for asset information generation (S62). This provided information is information used for generating the transaction information shown in FIG. The content of this provided information is determined in advance by the blockchain smart contract (contract automation).

Next, the verification unit 92 of the node 9 verifies the certificate and the provided information received in step S62 (S63). Next, a case where there is no problem with the verification result will be described.

Next, the transaction processing unit 94 uses the provided information received in step S62 to generate transaction information as shown in FIG. 17 and stores it in the storage unit 9000 (S64). In this case, the transaction processing unit 94 assigns a transaction ID and sets the transaction type. The transaction information includes transaction ID, transaction type information, and provided information (provider, provided date and time, (tradable) quantity, production method, and owner information). Of these, the transaction ID is an example of unique identification information for identifying transaction information. The transaction type is information indicating the processing content for the asset information. In FIG. 17, since the transaction type is asset information generation, the asset processing unit 95 generates asset information. The provider is information indicating the provider of the asset. The offer date and time is information indicating the date and time when the asset was provided by the provider. The (tradable) amount is information indicating the amount of electric power that the provider can trade within a predetermined period. The type of production method is information indicating the type of production method shown in FIG. 10 (b). The owner is information indicating the owner of the asset, which indicates the ownership of the asset.

Next, the asset processing unit 95 generates the asset information shown in FIG. 17 according to the transaction information shown in FIG. 17 and stores it in the storage unit 9000 (S65). In this case, the asset processing unit 95 trades the provided information (provider, provided date and time, (tradable) quantity, production method, and owner's information) in the transaction information, as well as the transaction expiration date and asset information. Set the situation. The transaction expiration date is set, for example, one month after the offer date. Further, the transaction status is information indicating whether or not the asset information has been traded (assigned or not) to the user by the intermediary server 5. In FIG. 17, since it is “not yet”, it shows a state in which the user has not been traded (allocated), that is, a state in which the intermediary has not yet provided the asset information to the user.

Further, the transmission / reception unit 91 of the node 9 distributes the transaction information generated in step S64 as a block to a plurality of other nodes of the blockchain network 90 (S66). As a result, each of the other nodes verifies the block, adds it to the chain of blocks already saved in each node, and then generates asset information in the same manner as in step S65 above and stores it in each storage unit according to the transaction information. To do. A plurality of transaction information may be stored in one block.

Next, the transmission / reception unit 91 of the node 9 transmits a response to the request in step S62 to the smart meter 3a (S67). The content of this response indicates whether the generation of asset information was successful or unsuccessful. As a result, the transmission / reception unit 31a of the smart meter 3a receives the response.

Next, in the smart meter 3a, the storage / reading unit 39a stores the response content in the storage unit 3000a.

As described above, the asset information indicating the contents set by the owner of the asset as the intermediary Da is managed on the blockchain network 90, and the process of providing the asset information from the provider to the intermediary is completed.

<Processing of providing asset information from an intermediary to a user>
Subsequently, with reference to FIGS. 18 and 19, a process of setting the owner of the asset mediated by the intermediary to the user will be described. FIG. 18 is a sequence diagram showing a process of setting the owner of an asset mediated by an intermediary to a user. FIG. 19 is a conceptual diagram of transaction information and asset information when a transaction of electric power usage is performed.

First, the transmission / reception unit 31c of the smart meter 3c of the consumer Ca transmits usage information indicating the usage state of electric power as an asset once in a predetermined time (for example, 30 minutes) via the communication network 100 (S81). ). This usage information includes each information of a user ID for identifying the consumer Ca as a user, the amount of electric power used as an asset, and the usage time of electric power as an asset. As a result, the transmission / reception unit 51 of the intermediary server 5 receives the usage information. Then, the transmission / reception unit 51 transmits a request for all asset information to the node 9 of the blockchain network 90, in which the mediator Da who manages the mediation server 5 is the owner (S82). This request includes an electronic certificate certifying that the intermediary Da as an intermediary is the person himself / herself so that the intermediary server 5 managed by the intermediary Da can access the blockchain network 90. , Includes information indicating the intermediary Da as the owner. As a result, the transmission / reception unit 91 of the node 9 receives all the asset information requests.

Next, at the node 9, the verification unit 92 verifies the certificate received in step S82 (S83). The certificate verification is a process of determining whether or not the received certificate is a certificate of the server registered in advance in the node 9. Next, a case where there is no problem with the verification result will be described.

The storage / reading unit 99 of the node 9 reads out all the asset information managed by the owner as the mediator Da who manages the mediation server 5 (S84). Then, the transmission / reception unit 91 transmits all the asset information read in step S84 to the intermediary server 5 (S85). As a result, the transmission / reception unit 51 of the intermediary server 5 receives all the asset information. As a result, the intermediary server 5 can be assigned to the user and the owner can receive the asset information of the intermediary Da.

Next, the storage / reading unit 59 of the intermediary server 5 reads out the corresponding transaction content information by searching the transaction content management DB 5003 using the user ID received in step S81 as a search key (S86). Further, the storage / reading unit 59 reads out each corresponding total transaction volume by searching the transaction history management DB 5004 using the user ID received in step S81 as a search key (S87). In the case of FIG. 10B, 20 (kWh) is read as the total trading volume of electric power produced by solar power, and 160 (kWh) is read as the total trading volume of electric power produced by oil. ..

Next, the determination unit 53 determines the asset related to the asset information to be transferred to the consumer Ca as the user based on the transaction content information read in step S86 and each total transaction volume read in step S87. (S88). For example, when the production method type is indicated as "solar" and "oil" in the transaction content information, the latest total transaction volume is "20" for solar and "160" for oil in the transaction history information. Therefore, the determination unit 53 determines the type of production method to be "solar" so as to approach the renewable energy rate "40".

Then, the storage / reading unit 59 is added to the transaction history management DB 5004 by storing the contents processed in step S88 (S89). As a result, for example, in the transaction history management DB 5004 (see FIG. 10B), the storage / reading unit 59 has an intermediary date / time “2020.1.1 9: 00-9: 30”, a transaction volume “10”, and a production method. Add a record showing the type "solar" and the total trading volume of solar "30".

Next, the transmission / reception unit 51 of the intermediary server 5 transmits a request for changing the asset information to the node 9 of the blockchain network 90 (S90). The change request includes an asset ID for identifying the asset information related to the specific asset produced by the specific type of production method determined in step S88 among the asset information received in step S85. ing. The change request in step S90 also includes information on the new owner and the (used) amount of the asset. When there are a plurality of assets produced by the specific type of production method determined in step 88, the transmission / reception unit 51 determines the specific asset whose expiration date is closest to the current date and time among the plurality of assets. Send a request to change asset information.

Next, at the node 9, the verification unit 92 verifies each information (asset ID, owner, (used) amount) received in step S90 (S91). This verification is a process of determining whether or not each piece of information has a predetermined format and content. Next, a case where there is no problem with the verification result will be described.

Next, the transaction processing unit 94 of the node 9 generates the second transaction information, and as shown in FIG. 19, the block containing the second transaction information is stored in the storage unit 9000. Additional storage is performed in the chain of blocks including one transaction (S92). Then, the asset processing unit 95 changes the content of the first asset information according to the second transaction information (S93).

Here, the processes of steps S92 and S93 will be described in detail with reference to FIG. The first transaction information and the first asset information on the left side of FIG. 19 are the same as the transaction information and the asset information of FIG. 17, respectively. Here, after the smart meter 3a sets the owner of the asset to the intermediary Da (generation of the first asset information based on the first transaction information), the intermediary server 5 changes the owner of the asset to the consumer Ca. By doing so (change of the first asset information based on the second transaction information), the case where the intermediary Da mediates the transaction of the asset information (ownership of the asset) will be described.

In step S92, the transaction processing unit 94 generates a second transaction information as shown in FIG. In this second transaction information, a unique transaction ID and "transaction of asset information" are indicated as the transaction type. Further, the second transaction information includes an intermediary date and time when the transaction of the asset information was mediated, a new owner after the intermediation, an asset ID for identifying the asset information to be transferred (transaction), and step S90. The usage of the asset (here, power) received in is shown.

Then, in step S93, the asset processing unit 95 changes the first asset information as shown in FIG. In the first asset information, the asset processing unit 95 changes the "(tradable) amount" to the "(used) amount" and changes the owner from the "intermediary Da" to the "consumer Ca". Further, since all of the tradable amount has been used, no more assets can be allocated. Therefore, the asset processing unit 95 changes the transaction status from "not yet" to "completed" in the first asset information. The asset information whose transaction status has been changed to "completed" loses its value as ownership and will be excluded from the transaction target in the future. Therefore, the transaction processing unit 94 does not target the asset information whose transaction status is set to "completed" as the transaction type of "asset information transaction". That is, the asset information excluded from the transaction target is not re-transferred.

As described above, the asset information is changed when the entire tradable amount of the asset is used. Returning to FIG. 18, the transmission / reception unit 91 of the node 9 transmits a response to the request in step S90 to the intermediary server 5 (S94). In this response, it is indicated that the processing for the request in step S90 succeeded or failed. As a result, the transmission / reception unit 51 of the intermediary server 5 receives the response. The transmission / reception unit 51 of the intermediary server 5 transmits a response to the transmission in step S81 to the smart meter 3c (S95). As a result, the transmission / reception unit 31c of the smart meter 3c receives the response from the intermediary server 5. The response content (success or failure) received in step S94 is shown as the response content, and is managed or displayed by the smart meter 3c. As a result, the consumer Ca can grasp the transaction result of the asset.

<Issuance process of production method certificate>
Subsequently, the process of issuing the asset production method certificate will be described with reference to FIGS. 20 and 22. 20 and 22 are sequence diagrams showing the issuance process of the asset production method certificate. Applicant E, in order to prove that the type of electric power production method used is renewable energy such as solar power, gives the intermediary Da a production method certificate to prove the asset production method. Request the issuance of. This will be described below.

As shown in FIG. 20, when the applicant E operates the operation panel 740 of the image processing device 7, the display control unit 73 displays the certificate shown in FIG. 21A on the operation panel 740. The issue screen is displayed (S201). On this certificate issuance screen, each input field (applicant ID, password, asset (here, power) usage period date, asset usage end date), asset production method (here, power generation type), and A selection button for selecting the type of certificate to be issued is displayed. In addition, at the bottom of the certificate issuance screen, there is an "OK" button that is pressed when confirming the transaction details selected by inputting in the input field and the selection button, and pressing when canceling without confirming the transaction details. The "CANCEL" button to be displayed is displayed.

Here, the applicant E inputs the desired content in each input field by operating the operation panel 740 of the image processing device 7, and further selects the desired content using the selection button, and "OK". When the button is pressed, the reception unit 72 accepts the input and selection of the transaction content (S202).

Here, as shown in FIG. 21 (b), the applicant E inputs his / her own user ID (applicant ID) and password, and also uses the transaction period information from January 1, 2020 to 2020. Enter January 31st of the year. Further, the applicant E selects "photovoltaic power generation" as the power generation type for certifying the production method, and selects "institution A" as the issuing organization for the production method certificate.

Next, the transmission / reception unit 71 transmits the issuance request information indicating that the issuance of the asset production method certificate is requested to the certificate issuance server 6 via the communication network 100 (S203). As a result, the transmission / reception unit 61 of the certificate issuing server 6 receives the issuance request information transmitted from the image processing device 7. This issuance request information includes the contents input and selected by step S202. Specifically, the issuance request information includes an applicant ID and password for identifying the applicant E, transaction period information indicating the period for trading the asset, an asset production method (power generation type), and a certificate type. include. That is, the applicant E requests, for example, the issuance of a production method certificate for a specific transaction period from January 1, 2020 to January 31, 2020.

Next, the authentication unit 62 of the certificate issuing server 6 performs an authentication process of the applicant E who has transmitted the issuance request information (S204). Specifically, the authentication unit 62 searches the applicant management table (see FIG. 11A) using the applicant ID and password included in the issuance request information received via the transmission / reception unit 61 as search keys. To do. Further, when the combination of the applicant ID and the password included in the issuance request information is managed in the applicant management table, the authentication unit 62 has the user name and the user associated with the applicant ID and the password. Read the key. Here, when the combination of the applicant ID and the password included in the issuance request information is managed in the applicant management table, the processes after step S205 are executed.

Next, the transmission / reception unit 61 transmits issuance request information indicating that the issuance of the production method certificate is requested to the node 9 of the blockchain network 90 (S205). This issuance request information includes an electronic certificate certifying that the intermediary Da as an intermediary is the person, a user key read in step S204, and a user name (here, consumer Ca). Includes transaction period information and power generation type. The certificate of the intermediary may be the same as the certificate of the intermediary server 5 as the server certificate assigned to the intermediary Da. Further, the transaction period information and the power generation type are the transaction period information and the power generation type received in step S203. As a result, the transmission / reception unit 91 of the node 9 receives the issuance request information transmitted from the certificate issuance server 6.

Next, the verification unit 92 of the node 9 verifies the certificate and the user key received in step S205 (S206). The certificate verification is a process of determining whether or not the received certificate is a certificate of the server registered in advance in the node 9. Further, the verification of the user key is a process of determining whether or not the received user key is the key information of the user (applicant) registered in advance in the node 9. Next, a case where there is no problem with the verification result will be described.

Next, the storage / reading unit 99 reads out the transaction information and the asset information in which the consumer Ca is set as the owner within the predetermined transaction period indicated by the transaction period information received in step S205 (S207). ). In this case, the storage / reading unit 99 reads out the specific transaction information in which the mediation date and time included in the transaction period is indicated and the new owner is indicated as the consumer Ca. Further, the storage / reading unit 99 reads the asset information based on the asset ID shown in the specific transaction information read.

In FIG. 22, the determination unit 93 of the node 9 determines the issuance status of the certificate of the asset shown in the asset information read in step S207 (step S208). Specifically, it is determined whether the issuance status shown in the asset information read in step S207 is "unissued" or "issued". When the determination unit 93 determines that the issue status is "unissued", the node 9 executes the process from step S209a below. On the other hand, when the determination unit 93 determines that the issue status is "issued", the node 9 executes the process from step S209b below. First, a case where it is determined that the issuance status is "not issued" will be described.

The transaction processing unit 94 of the node 9 generates the nth transaction information, and as shown in FIG. 23, the first transaction in which the block containing the nth transaction information is stored in the storage unit 9000. Is additionally stored in the chain of blocks containing (S209a). Then, the asset processing unit 95 changes the content of the first asset information according to the nth transaction information (S210a).

Here, the processing of steps S209a and S210a will be described in detail with reference to FIG. 23. The first transaction information and the first asset information on the left side of FIG. 23 are the same as the transaction information and the asset information of FIGS. 17 and 19, respectively.

In step S209a, the transaction processing unit 94 generates the nth transaction information as shown in FIG. 23. In this nth transaction information, "issue of certificate" is indicated as a unique transaction ID and a transaction type. In addition, the nth transaction information includes the issue date and time when the production method certificate was issued, the issuance amount of the asset (in this case, electric power) to be issued as the certificate, and the type of production method of the asset for which the certificate is issued. The asset ID for identifying the asset information to be issued, and the provider and owner of the asset are shown.

Then, in step S210a, the asset processing unit 95 changes the first asset information as shown in FIG. 23. Since the asset processing unit 95 has issued the production method certificate to the asset, the issue status of the production method certificate is updated from "not yet" to "completed (issued)" in the first asset information.

In this way, when the production method certificate is issued, the issuance status shown in the asset information is changed. In the node 9, the transaction processing unit 94 makes a transaction using a plurality of asset information when the issuance amount of the asset to be issued as a certificate is insufficient for the usage amount shown in one asset information. I do. In this case, the asset processing unit 95 changes (updates) not only the first asset information but also a plurality of asset information.

Returning to FIG. 22, the transmission / reception unit 91 of the node 9 transmits an update notification indicating that the issuance status has been updated to the certificate issuing server 6 (S211a). The update notification includes the transaction information (nth transaction information) generated in step S209a and the asset information (first asset information) changed in step S210a. As a result, the transmission / reception unit 61 of the certificate issuing server 6 receives the update notification transmitted from the node 9.

Next, the generation unit 63 of the certificate issuing server 6 generates a production method certificate based on the transaction information and the asset information included in the update notification received by the transmission / reception unit 61 (S212a). Specifically, the generation unit 63 searches the certificate type management table (see FIG. 11B) using the certificate type included in the transaction request information received in step 203 as a search key. Further, the generation unit 63 reads out the format of the certificate associated with the institution name which is the certificate type included in the transaction request information. Then, the generation unit 63 generates the production method certificate by describing the contents shown in the transaction information and the asset information received in step S211a with respect to the read format.

Next, the transmission / reception unit 61 of the certificate issuing server 6 transmits the certificate data related to the production method certificate generated by the generation unit 63 to the image processing device 7 that transmitted the issuance request information in step S203. (S213a). As a result, the transmission / reception unit 71 of the image processing device 7 receives the certificate data transmitted from the certificate issuing server 6.

Then, the image processing device 7 outputs the certificate data received in step S212 (S214a). Specifically, when the applicant E operates the operation panel 740 of the image processing device 7, the image processing device 7 has the print processing unit 75 print the certificate data. FIG. 24 is a diagram showing an example of a printed production method certificate. The production method certificate shown in FIG. 24 is a power certificate for certifying the production method of electric power which is an example of the assets used by the applicant (user). The power certificate is referred to as, for example, a green power certificate. The production method certificate includes the amount of power generated corresponding to the amount issued as the certificate, the power generation period corresponding to the transaction period information for which the certificate was issued, and the asset (here, power) issued as the certificate. The power generation method, which is the production method, the issue date of the certificate, and the issuing organization of the certificate, which is the issuer, are shown. Further, the production method certificate shows a transaction identification image for confirming that the content of the certificate is the same as the transaction history (transaction information) of the blockchain network 90.

The transaction identification image is, for example, a QR code (registered trademark) as shown in FIG. 24. The transaction identification image includes a transaction ID in order to collate with the transaction history of the blockchain network 90. For example, the business operator who has received the application using the production method certificate by the applicant E can confirm the validity of the certificate by reading the transaction identification image shown in the production method certificate.

This transaction identification image is generated by the generation unit 63 of the certificate issuing server 6 in the process of step S212a. The generation unit 63 generates a transaction identification image by using the transaction information ID (transaction ID) included in the update notification received in step S211a. The transaction identification image is not limited to the QR code, and is read by, for example, a one-dimensional code such as a barcode, a two-dimensional code such as DataMatrix (DataCode), MaxiCode or PDF417, or a reading device such as RFID (Radio Frequency Identification). Any information (or image) that is possible may be used. Further, the transaction identification image may be an image in which the transaction ID is directly described so that it can be visually identified.

Here, in step S214a, the configuration in which the image processing device 7 outputs the certificate data by the printing process by the print processing unit 75 has been described, but the image processing device 7 has the display image related to the certificate data by the display control unit 73. May be configured to output the certificate data by displaying the above on the operation panel 740. In this way, when the certificate data is displayed and output, the image processing device 7 may be a terminal or device that does not have a printing function. In this case, the image processing device 7 may be, for example, a smartphone, a tablet terminal, a PC, a smart watch, a smart glass, or the like provided with a display unit. Further, when the applicant E is in the same environment as the consumer Ca, the smartphone 2c owned by the consumer Ca may be configured to have the function of the image processing device 7.

This completes the mediation process for issuing the production method certificate by the mediator Da. As a result, Applicant E, after receiving the production method certificate, can use the issued production method certificate to improve the image of the company or to apply for subsidies from the government, etc. by using renewable energy. can do.

On the other hand, in step S208 of FIG. 22, the case where the issuance status is determined to be "issued" will be described. The transmission / reception unit 91 of the node 9 transmits an issuance notification indicating that the production method certificate of the asset corresponding to the issuance request information received in step S203 has been issued to the certificate issuance server 6 ( S209b). As a result, the transmission / reception unit 61 of the certificate issuing server 6 receives the issued notification transmitted from the node 9. Then, the transmission / reception unit 61 of the certificate issuing server 6 transmits the issuance notification received in step S209b to the image processing device 7 that has transmitted the issuance request information in step S203 (S210b). As a result, the transmission / reception unit 71 of the image processing device 7 receives the issued notification transmitted from the certificate issuing server 6.

As described above, when the issuance status shown in the asset information is "completed", even if the node 9 receives the issuance request information, the certificate is issued to the asset whose issuance status is "completed". Not performed. As a result, the node 9 can prevent the double issuance of the production method certificate for the same asset.

[Main effects of the embodiment]
As described above, according to the present embodiment, the transaction system 1 performs the procedure for issuing the production method certificate by the applicant E using the image processing device 7 via the certificate issuing server 6 of the intermediary Da. .. When the certificate issuing server 6 receives the certificate issuance request from the image processing device 7, the certificate issuing server 6 transmits the certificate issuance request to the nodes 9 constituting the blockchain network 90. If the certificate issuance status of the asset to which the certificate is issued has not been issued, the node 9 updates the issuance status to issued. Then, when the issuance status is updated to have been issued by the node 9, the certificate issuing server 6 generates certificate data and provides it to the image processing device 7. On the other hand, when the issue status of the asset to be issued with the certificate has already been issued, the node 9 transmits the issued notification to the image processing device 7 via the certificate issuing server 6. As a result, the transaction system 1 can prevent double issuance of the certificate because the issuance status shown in the asset information is updated once the certificate is issued at the node 9.

Further, the certificate issuing server 6 of the intermediary Da, which has been approved by the certificate issuing authority, sends the production method certificate generated by using the transaction information and the asset information acquired from the blockchain network 90 to the applicant E. By providing the certificate, it is possible to reduce the burden on the applicant E, such as exchanging documents with the issuing institution until the certificate is issued.

Further, the applicant E can easily obtain the production method certificate required for various applications by displaying or printing the production method certificate obtained from the certificate issuing server 6 on the image processing device 7 and outputting it. can do. In addition, since the production method certificate is provided with a transaction identification image that identifies the transaction history on the blockchain network 90, the business operator who accepts the application using the production method certificate can justify the transaction. Can be confirmed.

Further, since the quality of assets such as electric power provided to the user is constant, even if the type of asset production method is unknown, the node 9 of the blockchain network 90 can determine the type of asset production method. By managing the asset information indicating the owner of the asset and the transaction information used to generate the asset information, it is possible to prove the type of production method without fraud.

Furthermore, in order to realize stable use of electric power, it is necessary to adjust the consumed electric power and the produced electric power to be the same in real time (simultaneous equal amount). However, since the blockchain is a decentralized ledger, it takes a certain amount of time to confirm the consistency of each ledger information via the network, so it is not suitable for applications such as immediate trading of assets that require real-time performance. is there. On the other hand, in the present embodiment, the intermediary server 5 is managed by the blockchain network 90 after the consumer Ca uses the assets, not at the timing when the consumer Ca starts using the assets such as electric power. A change request for changing the owner indicated by the asset information from the original owner to the user (consumer Ca) is transmitted to the blockchain network 90. As a result, it is possible to manage the ownership of assets by the blockchain even for applications such as immediate trading of assets that require real-time performance. Moreover, since the intermediary server 5 changes the asset information managed by the blockchain network 90 on behalf of the provider (producer Aa, etc.) and the user (consumer Ca, etc.), the provider (producer Aa, etc.) ) And users (consumers Ca, etc.) can trade electricity without worrying about changes in asset information.

The intermediary server 5 is also used for immediate trading of assets such as electric power produced by using renewable energy such as solar power by changing the owner of a specific type of asset production method. can do.

[Modified example of the embodiment]
Here, a modified example of the present embodiment will be described with reference to FIGS. 25 to 30. First, in the transaction system 1A according to the first modification, when the mediation process of the production method certificate is performed by the mediation system 1000, the node 9 performs the certificate generation process. This will be described below. The same configuration and the same function as those in the above embodiment are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 25 is a functional block diagram of an intermediary server, a certificate issuing server, and a node in the trading system according to the first modification. Node 9A of the trading system 1A shown in FIG. 25 includes a generation unit 96 and a certificate type management unit 97 in addition to the configuration of the node 9 described in the above-described embodiment. Further, in the storage unit 9000 of the node 9A, a certificate type management DB 9001 configured by a certificate type management table as shown in FIG. 11B is constructed.

The generation unit 96 is mainly realized by the processing of the CPU 901, and generates the production method certificate to be provided to the applicant E based on the transaction information and the asset information.

The certificate type management unit 97 is mainly realized by the processing of the CPU 901 and manages the format of the certificate for each issuing organization that issues the production method certificate.

26 and 27 are sequence diagrams showing the issuance process of the asset production method certificate in the trading system according to the first modification. Since the processing of steps S301 to 307 is the same as the processing of steps S201 to S207 shown in FIGS. 20 and 22, the description thereof will be omitted. Here, in step S305, the issuance request information transmitted from the transmission / reception unit 61 of the certificate issuing server 6 includes the certificate type received in step S303 in addition to the information transmitted in step S205. There is.

In FIG. 27, the determination unit 93 of the node 9A determines the issuance status of the certificate of the asset shown in the asset information read in step 307, as in the process of step S208 of FIG. 22 (step S308). ). When the determination unit 93 determines that the issue status is "unissued", the node 9A executes the process from step S309a below. On the other hand, when the determination unit 93 determines that the issuance status is "issued", the node 9A executes the process from step S309b below. First, a case where it is determined that the issuance status is "not issued" will be described.

The transaction processing unit 94 of the node 9A generates the nth transaction information, and stores the block including the nth transaction information in the storage unit 9000, as in the process of step S209a of FIG. 22. Additional storage is performed in the chain of blocks including transactions (S309a). Then, the asset processing unit 95 changes the content of the first asset information according to the nth transaction information, as in the process of step S210a of FIG. 22 (S310a).

The generation unit 96 of the node 9A generates a production method certificate based on the transaction information generated in step S309a and the asset information changed in step S310a (S311a). Specifically, the generation unit 96 searches the certificate type management table (see FIG. 11B) using the certificate type included in the issuance request information received in step 305 as a search key. Further, the generation unit 96 reads out the format of the certificate associated with the institution name which is the certificate type included in the issuance request information. Then, the generation unit 96 generates a production method certificate by describing the contents shown in the transaction information generated in step S309a and the asset information changed in step S310a for the read format. To do.

Next, the transmission / reception unit 91 of the node 9A transmits the certificate data related to the production method certificate generated by the generation unit 96 to the certificate issuing server 6 (S312a). As a result, the transmission / reception unit 61 of the certificate issuing server 6 receives the certificate data transmitted from the node 9A. Then, the transmission / reception unit 61 of the certificate issuing server 6 transmits the certificate data transmitted from the node 9A to the image processing device 7 that has transmitted the issuance request information in step S303 (S313a). As a result, the transmission / reception unit 71 of the image processing device 7 receives the certificate data transmitted from the certificate issuing server 6.

Then, the image processing device 7 outputs the certificate data received in step S313a (S313). The method of outputting the certificate data in the image processing apparatus 7 is the same as the content described in step S214a described above.

On the other hand, in step S308 of FIG. 27, the case where the issuance status is determined to be “issued” will be described. The transmission / reception unit 91 of the node 9A transmits an issuance notification indicating that the production method certificate of the asset corresponding to the issuance request information received in step S305 has been issued to the certificate issuance server 6 ( S309b). As a result, the transmission / reception unit 61 of the certificate issuing server 6 receives the issued notification transmitted from the node 9A. Then, the transmission / reception unit 61 of the certificate issuing server 6 transmits the issuance notification received in step S309b to the image processing device 7 that has transmitted the issuance request information in step S303 (S310b). As a result, the transmission / reception unit 71 of the image processing device 7 receives the issued notification transmitted from the certificate issuing server 6.

As described above, the transaction system 1A according to the modification 1 performs the production method certificate generation process in the asset production method certificate issuance process via the certificate issuance server 6, and the node 9A constituting the blockchain network 9. Do. In this case, since the certificate issuing server 6 only performs the authentication process of the applicant E and the data mediation process between the image processing device 7 and the node 9A, the processing load on the mediator Da side can be reduced. ..

Next, the configuration of the trading system 1B according to the second modification will be described with reference to FIGS. 28 to 30. In the trading system 1B according to the modified example 2, in addition to the configuration of the trading system 1A of the modified example 1, the image processing device 7A has an authentication function and a communication function with the blockchain network 90. A dedicated application is installed in the image processing device 7A, and information is exchanged with the blockchain network 90. This will be described below. The same configuration and the same function as those in the above embodiment are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 28 is a functional block diagram of the image processing device in the trading system according to the second modification. The image processing device 7A of the trading system 1B shown in FIG. 25 includes an authentication unit 76 in addition to the configuration of the image processing device 7 described in the above-described embodiment. Further, in the storage unit 7000 of the image processing device 7A, an applicant management DB 7001 composed of an applicant management table as shown in FIG. 11A is constructed.

The authentication unit 76 performs the authentication process of the applicant E requesting the issuance of the production method certificate based on the applicant identification information realized by the processing of the CPU 701 and received by the reception unit 72.

29 and 30 are sequence diagrams showing the issuance process of the asset production method certificate in the trading system according to the second modification. Since the processing of steps S401 to 402 is the same as the processing of steps S201 to S202 shown in FIG. 20, the description thereof will be omitted.

The authentication unit 76 of the image processing device 7A performs the authentication process of the applicant E (S403). Specifically, the authentication unit 76 searches the applicant management table (see FIG. 11A) using the applicant ID and password entered in step S402 as search keys. Further, when the combination of the entered applicant ID and password is managed in the applicant management table, the authentication unit 76 reads out the user name and user key associated with the applicant ID and password. Here, when the combination of the entered applicant ID and password is managed in the applicant management table, the processes after step S404 are executed.

Next, the transmission / reception unit 71 transmits the issuance request information indicating that the issuance of the asset production method certificate is requested to the node 9A via the communication network 100 (S404). As a result, the transmission / reception unit 91 of the node 9A receives the issuance request information transmitted from the image processing device 7. This issuance request information is selected by the user key and user name (here, consumer Ca) read in step S403, transaction period information indicating the period for trading the asset input in step S402, and step S402. The production method (power generation type) and certificate type of the created asset are included.

Next, the verification unit 92 of the node 9A verifies the user key received in step S404 (S405). The verification of the user key is a process of determining whether or not the received user key is the key information of the user (applicant) registered in advance in the node 9. Next, a case where there is no problem with the verification result will be described. Similar to the process of step S207 of FIG. 20, the storage / reading unit 99 is a transaction in which the consumer Ca is set as the owner within the predetermined transaction period indicated by the transaction period information received in step S405. Read information and asset information (S406).

In FIG. 30, the determination unit 93 of the node 9A determines the issuance status of the certificate of the asset shown in the asset information read in step 406, as in the process of step S208 of FIG. 22 (step S407). ). When the determination unit 93 determines that the issue status is "unissued", the node 9A executes the process from step S408a below. On the other hand, when the determination unit 93 determines that the issuance status is "issued", the node 9A executes the process from step S408b below. First, a case where it is determined that the issuance status is "not issued" will be described.

The transaction processing unit 94 of the node 9A generates the nth transaction information, and stores the block including the nth transaction information in the storage unit 9000, as in the process of step S209a of FIG. 22. Additional storage is performed in the chain of blocks including transactions (S408a). Then, the asset processing unit 95 changes the content of the first asset information according to the nth transaction information, as in the process of step S210a of FIG. 22 (S409a).

The generation unit 96 of the node 9A generates a production method certificate based on the transaction information generated in step S408a and the asset information changed in step S409a (S410a). Specifically, the generation unit 96 searches the certificate type management table (see FIG. 11B) using the certificate type included in the issuance request information received in step 404 as a search key. Further, the generation unit 96 reads out the format of the certificate associated with the institution name which is the certificate type included in the issuance request information. Then, the generation unit 96 generates a production method certificate by describing the contents shown in the transaction information generated in step S408a and the asset information changed in step S409a for the read format. To do.

Next, the transmission / reception unit 91 of the node 9A transmits the certificate data related to the production method certificate generated by the generation unit 96 to the image processing device 7A that transmitted the issuance request information in step S404 (S411a). .. As a result, the transmission / reception unit 71 of the image processing device 7A receives the certificate data transmitted from the node 9A.

Then, the image processing device 7A outputs the certificate data received in step S410 (S412a). The method of outputting the certificate data in the image processing apparatus 7A is the same as the content described in step S213 described above.

On the other hand, in step S407 of FIG. 30, a case where the issuance status is determined to be "issued" will be described. The transmission / reception unit 91 of the node 9A indicates that the production method certificate of the asset corresponding to the issuance request information received in step S404 has been issued to the image processing device 7A that transmitted the issuance request information in step S404. The indicated issued notification is transmitted (S408b). As a result, the transmission / reception unit 71 of the image processing device 7A receives the issued notification transmitted from the node 9A.

As described above, the transaction system 1B according to the modification 2 does not require any system or device other than the image processing device 7A when the applicant E outputs the production method certificate using the image processing device 7A. , The transaction history of the blockchain network 90 can be referred to.

[Summary]
As described above, the node according to the embodiment of the present invention is the node 9, 9A in the blockchain network 90, which indicates the type of the asset production method and is a certificate for certifying the production method. Stores asset information indicating the issuance status of. Further, the nodes 9, 9A request the issuance of a certificate for a predetermined asset transmitted from the mediation system 1000 that mediates the issuance of the certificate to the image processing devices 7, 7A (an example of the information processing device). Issuance request information indicating is received. Then, when the issuance status of the asset corresponding to the received issuance request information is not yet issued, the nodes 9 and 9A update the issuance status shown in the stored asset information to be issued and receive the result. When the issuance status of the asset corresponding to the issuance request information has been issued, an issuance notification indicating that the certificate has been issued is transmitted to the image processing devices 7 and 7A. As a result, the nodes 9, 9A can prevent double issuance when issuing the certificate of the production method of the asset.

Further, in the node 9, 9A according to the embodiment of the present invention, the asset information indicates the owner of the asset, and the node 9, 9A is the identification information (for example, the user name) shown in the issuance request information. Update the issuance status of asset information indicating the owner corresponding to. Further, the nodes 9 and 9A update the issuance status of the asset information indicating the asset corresponding to the production method shown in the issuance request information. As a result, nodes 9, 9A manage the type of asset production method, the issuance status of the certificate for certifying the production method, and the asset information indicating the owner of the asset, so that the type of production method is not fraudulent. Can be proved.

Further, the trading systems 1, 1A according to the embodiment of the present invention include nodes 9, 9A in the blockchain network 90, and an image processing device 7 (an example of an information processing device). The image processing device 7 transmits the issuance request information indicating that the issuance of the certificate is requested to the intermediary system 1000, and the certificate data generated based on the transmitted issuance request information is transmitted to the intermediary system 1000. Received from, and outputs the received certificate data. As a result, the trading systems 1 and 1A display or print the production method certificate obtained from the certificate issuing server 6 (intermediary system 1000) on the image processing device 7 and output it, which is necessary for various applications. Applicant E can easily obtain a production method certificate.

Further, the trading system 1B according to the embodiment of the present invention includes a node 9A in the blockchain network 90 and an image processing device 7A (an example of an information processing device). The image processing device 7A transmits the issuance request information indicating that the issuance of the certificate is requested to the node 9A, and receives the certificate data generated based on the transmitted issuance request information from the node 9A. Then, the received certificate data is output. As a result, the transaction system 1B does not require any system or device other than the image processing device 7A when the applicant E outputs the production method certificate using the image processing device 7A, and the blockchain network 90 You can refer to the transaction history of.

Further, in the transaction system 1 according to the embodiment of the present invention, the certificate data includes a transaction identification image for identifying a transaction for which a certificate related to the certificate data has been issued. As a result, the transaction system 1 can refer to the transaction history of the blockchain network 90 by using the transaction identification image included in the issued production method certificate, so that the validity of the transaction can be confirmed. Can be done.

[Other]
In the above embodiment, the asset information includes information indicating the owner of the asset, but in some cases, the information indicating the owner of the asset may not be included. For example, when the user is self-sufficient, as in the case where the user is also a producer, it is not necessary to transfer the asset to another person (other company), so it is sufficient if the type of production method can be proved.

Further, in the above embodiment, electric power is shown as an example of an asset, but the present invention is not limited to this, and includes those that actually exist and those that do not actually exist as follows. What actually exists is real estate such as land and buildings, and movables such as goods or the quantity of goods. When the asset is real estate, the asset information is incidental information such as ownership. When the asset is movable, the asset information is incidental information such as ownership.

On the other hand, as things that do not actually exist, there are tokens (virtual currency) or the amount of tokens, carbon dioxide emission credits, rights such as intellectual property rights, contracts, and the like. When the asset is a token, the asset information is incidental information such as ownership. When the asset is a carbon dioxide emission credit, the asset information is incidental information such as ownership. When the asset is a right such as an intellectual property right, the asset information is incidental information such as the owner of the right, the transferee of the right, and the licensee. When the asset is a contract, the asset information is incidental information such as contract conditions and performance status. Not only contracts, but also treaties, agreements, promises, memorandums, memos, etc. are the same as contracts.

In addition, assets in the case of postpaid processing include not only electric power but also gas, tap water, telephone calls, and the like. In the case of gas, tap water, and telephone calls, the asset information is incidental information such as ownership.

Each component such as each CPU 201, 301, 501, 601, 701, 901 may be single or plural. Further, each function of the embodiment described above can be realized by one or a plurality of processing circuits. Here, the "processing circuit" in the present embodiment is designed to execute each function described above, or a processor programmed to execute each function by software such as a processor implemented by an electronic circuit. It shall include devices such as ASIC (Application Specific Integrated Circuit), DSP (digital signal processor), FPGA (field programmable gate array), SOC (System on a chip), GPU (Graphics Processing Unit), and conventional circuit modules. ..

Further, the various tables of the embodiment described above may be generated by the learning effect of machine learning, and by classifying the data of each related item by machine learning, the table is not used. You may. Here, machine learning is a technology for making a computer acquire learning ability like a human being, and the computer autonomously generates an algorithm necessary for judgment such as data identification from learning data taken in advance. However, it refers to a technology that applies this to new data to make predictions. The learning method for machine learning may be any of supervised learning, unsupervised learning, semi-supervised learning, enhanced learning, and deep learning, and may be a learning method that combines these learning methods. Machine learning It doesn't matter how you learn for.

Although the nodes, transaction systems, processing methods, programs, and blockchain networks according to one embodiment of the present invention have been described so far, the present invention is not limited to the above-described embodiments, and the present invention is not limited to the above-described embodiments. Additions, changes, deletions, etc. can be made within the range that can be conceived by those skilled in the art, and any aspect is included in the scope of the present invention as long as the actions and effects of the present invention are exhibited.

1,1A,1B Trading system 2 Smartphone (example of communication terminal)
3 Smart meter (example of measurement terminal)
4 Power generation device 5 Mediation server 6 Certificate management server 7,7A Image processing device 8 Electrical device 9,9A Node 10 Transmission and distribution network 61 Transmission / reception unit (an example of a third receiving means, an example of a third transmitting means)
63 Generation unit (example of generation means)
71 Transmitter / receiver (an example of a second transmitting means, an example of a second receiving means)
73 Display control unit (example of output means)
75 Print control unit (example of output means)
90 Blockchain network 91 Transmitter / receiver (example of receiving means, example of transmitting means)
93 Judgment unit 94 Transaction processing unit 95 Asset processing unit (an example of asset processing means)
96 Generation unit (example of generation means)
100 Communication network 1000 Mediation system 9000 Storage unit (example of storage means)

JP-A-2019-144851 Special Table 2018-521437

Claims (16)

A node in a blockchain network
A storage means for storing asset information indicating the type of asset production method and the issuance status of a certificate for certifying the production method.
A receiving means for receiving issuance request information sent from the information processing device indicating that the issuance of the certificate is requested for a predetermined asset, and
When the issuance status of the asset corresponding to the received issuance request information has not been issued, the asset processing means for updating the issuance status shown in the stored asset information to issued, and the asset processing means.
When the issuance status of the asset corresponding to the received issuance request information has been issued, a transmission means for transmitting an issuance notification indicating that the certificate has been issued to the information processing apparatus, and a transmission means.
A node characterized by having. The asset information indicates the owner of the asset and
The node according to claim 1, wherein the asset processing means updates the issuance status of the asset information indicating the owner corresponding to the identification information shown in the issuance request information. The node according to claim 1 or 2, wherein the asset processing means updates the issuance status of the asset information indicating the asset corresponding to the production method shown in the issuance request information. Claims 1 to 3, wherein the asset is electric power, and the type of the production method is a production method using renewable energy, a production method using fossil fuel, or a production method using nuclear power. The node described in any one of the above. The node according to claim 4, wherein the renewable energy is sunlight, solar heat, wind power, biomass, geothermal power, hydraulic power, or heat in the atmosphere. A trading system including the node according to any one of claims 1 to 5 and the information processing apparatus.
The information processing device
A second transmission means for transmitting the issuance request information to an intermediary system that mediates the issuance of the certificate to the information processing apparatus.
A second receiving means for receiving the certificate data generated based on the transmitted issuance request information from the intermediary system, and
An output means for outputting the received certificate data and
A trading system characterized by having. The trading system according to claim 6, further comprising the intermediary system.
The transmission means transmits an update notification indicating that the issuance status has been updated by the asset processing means to the intermediary system.
The intermediary system further
A third receiving means for receiving the update notification from the node,
A generation means for generating the certificate data and a third transmission means for transmitting the generated certificate data to the information processing device based on the asset information shown in the received update notification. When,
A trading system characterized by having. The trading system according to claim 6.
The node further
It has a generation means for generating certificate data including asset information whose issuance status has been updated by the asset processing means.
The transmission means is a trading system characterized in that the generated certificate data is transmitted to the intermediary system. A trading system including the node according to any one of claims 1 to 5 and the information processing apparatus.
The information processing device
A second transmission means for transmitting the issuance request information to the node, and
A second receiving means for receiving the certificate data generated based on the transmitted issuance request information from the node, and
An output means for outputting the received certificate data and
A trading system characterized by having. The trading system according to claim 9.
The node further
It has a generation means for generating certificate data including asset information whose issuance status has been updated by the asset processing means.
The transmission means is a trading system characterized in that the generated certificate data is transmitted to the information processing apparatus. The transaction system according to any one of claims 6 to 10, wherein the certificate data includes a transaction identification image for identifying a transaction for which a certificate related to the certificate data has been issued. The trading system according to any one of claims 6 to 11, wherein the output means outputs the certificate data by performing a printing process. The trading system according to any one of claims 6 to 12, wherein the output means displays a display image showing the certificate data on a display unit. It is a processing method executed by a node in a blockchain network.
The node
It has a storage means for storing asset information indicating the type of asset production method and the issuance status of a certificate for certifying the production method.
A receiving step of receiving issuance request information sent from the information processing device indicating that the certificate is requested to be issued for a predetermined asset, and a receiving step.
When the issuance status of the asset corresponding to the received issuance request information has not been issued, the asset processing step for updating the issuance status shown in the stored asset information to issued, and the asset processing step.
When the issuance status of the asset corresponding to the received issuance request information has been issued, a transmission step of transmitting an issuance notification indicating that the certificate has been issued to the information processing apparatus, and a transmission step.
Processing method to execute. A program that is executed by a node in a blockchain network.
The node
It has a storage means for storing asset information indicating the type of asset production method and the issuance status of a certificate for certifying the production method.
A receiving step of receiving issuance request information sent from the information processing device indicating that the certificate is requested to be issued for a predetermined asset, and a receiving step.
When the issuance status of the asset corresponding to the received issuance request information has not been issued, the asset processing step for updating the issuance status shown in the stored asset information to issued, and the asset processing step.
When the issuance status of the asset corresponding to the received issuance request information has been issued, a transmission step of transmitting an issuance notification indicating that the certificate has been issued to the information processing apparatus, and a transmission step.
A program that executes. It ’s a blockchain network,
A storage means for storing asset information indicating the type of asset production method and the issuance status of a certificate for certifying the production method.
A receiving means for receiving issuance request information sent from the information processing device indicating that the issuance of the certificate is requested for a predetermined asset, and
When the issuance status of the asset corresponding to the received issuance request information has not been issued, the asset processing means for updating the issuance status shown in the stored asset information to issued, and the asset processing means.
When the issuance status of the asset corresponding to the received issuance request information has been issued, a transmission means for transmitting an issuance notification indicating that the certificate has been issued to the information processing apparatus, and a transmission means.
A blockchain network characterized by having.