Classifications

• • G—PHYSICS
  • G06—COMPUTING OR CALCULATING; COUNTING
  • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
  • G06Q20/00—Payment architectures, schemes or protocols
  • G06Q20/30—Payment architectures, schemes or protocols characterised by the use of specific devices or networks
  • G06Q20/32—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using wireless devices
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
  • H04L9/10—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols with particular housing, physical features or manual controls

Definitions

• the present invention relates to a data terminal that performs NFT transactions using crypto assets, an NFT distribution system that distributes NFT card wallets through wireless communication between a specified NFC card, a wallet card creation method for the NFT distribution system, and an activation processing method for the NFC card processing system.
• crypto assets are fungible.
• crypto asset Bitcoin one Bitcoin owned by one person and one Bitcoin owned by another person have the same value and are fungible.
• private key mechanism in crypto assets.
• the "public key cryptography" of the blockchain used in NFTs and crypto assets employs an encryption mechanism that uses two types of "keys," a public key and a private key.
• a public key is a key used to encrypt data, and since it is merely a key used for encryption, there are no security issues with it being made public.
• a private key is a key used to decrypt data encrypted with a public key, and is also used for electronic signatures when recording data on the blockchain. If a third party learns a private key, they can use it to restore data encrypted with that key. Therefore, unlike public keys, private keys must be stored securely to prevent leaks. For this reason, how private keys are stored is important in wallets that handle cryptocurrencies.
• hot wallets There are also hot wallets and cold wallets.
• the advantage of hot wallets is that they can be connected to a network, allowing users to easily manage NFTs and crypto assets online.
• cold wallets have the advantage that they are not connected to a network, so there is no risk of unauthorized access through hacking over the network or infection by a virus.
• Patent Document 1 also mentions that when recording data on a blockchain, a digital signature must be created for the data to be recorded using a private key held by the data creator, and therefore when issuing or buying and selling NFTs, a wallet must be connected to the NFT marketplace. It also mentions that since cryptocurrencies are often used in NFT transactions, a wallet is essential for NFT transactions.
• Types of cryptocurrencies include, for example, Bitcoin (BTC: registered trademark), Ethereum (ETH: registered trademark), Litecoin (LTC), and Monacoin (MONA: registered trademark).
• Uses of cryptocurrencies include, for example, storing value, purchasing goods, and managing fees for data written on the blockchain.
• MetaMask product name
• users can operate the data terminal to store, manage, send and receive Ethereum (ETH: registered trademark) and Ethereum-based cryptocurrencies and NFTs, and connect to decentralized applications (DApps) using a web browser or the built-in browser of a mobile app. It also supports linking with multiple decentralized exchanges (DEX), allowing users to search for optimal exchange rates and exchange Ethereum-based tokens.
• DEX decentralized exchanges
• Patent Document 2 has been published as a device that uses a multi-signature blockchain wallet to execute cryptocurrency blockchain transactions via an integrated circuit payment card.
• Patent Document 2 describes the configuration of a cryptocurrency blockchain transaction as follows: "A method for performing a cryptocurrency blockchain transaction via an integrated circuit payment card using a multi-signature blockchain wallet includes storing at least a first private key of a first cryptographic key pair and a transaction account number in a storage unit of an integrated circuit of the payment card; receiving a blockchain transaction from a point-of-sale device by a receiver of the integrated circuit, the blockchain transaction including at least one or more unspent transaction output amounts, one or more destination addresses, a cryptocurrency amount for each of the one or more destination addresses, and a first digital signature generated using a second private key of a second cryptographic key pair; digitally signing the blockchain transaction using the first private key by a processor of the integrated circuit to generate a second digital signature; and transmitting the digitally signed blockchain transaction including the first digital signature and the second digital signature by a transmitter of the integrated circuit to the point-of-sale device.”
• the present invention was made based on the above circumstances, and its purpose is to provide an NFT distribution system that uses an NFC card medium to enable users to check information about owned NFTs and crypto assets on a data terminal with simple operations.
• the objective is to provide an activation processing method for an NFC card processing system that allows an NFC card to be safely activated based on a common protocol that is compatible with multiple virtual currencies simply by possessing one NFC card.
• the NFT distribution system of the present invention is an NFT distribution system in which a specific NFC card and a data terminal that communicates with the NFC card by close proximity wireless communication are connected, and the data terminal is characterized in that it comprises an encryption means that creates a private key for using the NFC card as a wallet for managing owned NFTs and encrypts the created private key, and a control means that, when the private key encrypted by the encryption means is written to a storage medium of the NFC card, erases the private key from the storage medium and controls the writing of address information for trading the NFT to the storage medium.
• the activation processing method of the NFC card processing system of the present invention is an activation processing method for an NFC card processing system in which a data terminal performs near field wireless communication with an NFC card via a specified communication medium, and the data terminal performs activation processing of the NFC card read by the data terminal in cooperation with multiple system management servers, and is characterized by comprising: a first registration step of performing pre-activation processing on the NFC card via any one of the multiple system management servers and registering the UID (unique identification number) of the NFC card in a pre-activation database; and a second registration step of performing activation processing on a processed NFC card for which pre-activation processing has been completed via any one of the multiple system management servers, and linking and registering a public key generated in the activation database with the UID.
• the present invention makes it possible to popularize card-type wallets that use NFC card media and allow users to check information about owned NFTs and crypto assets on a data terminal with simple operations.
• FIG. 2 is a plan view illustrating the configuration of a data processing device in the NFT distribution system according to the embodiment.
• FIG. 2 is a block diagram illustrating a hardware configuration of the data terminal shown in FIG. 10 is a flowchart showing an example of a data processing procedure of a data processing device in the NFT distribution system according to the embodiment.
• 10 is a flowchart showing an example of a data processing procedure of a data processing device in the NFT distribution system according to the embodiment.
• 1 is a block diagram illustrating the configuration of an NFC card processing system according to an embodiment of the present invention.
• FIG. 6 is a block diagram illustrating the functional processing of the ownership confirmation server shown in FIG. 5 .
• 6 is a flowchart showing an example of an ownership confirmation sequence performed by the ownership confirmation server shown in FIG. 5 .
• FIG. 6 is a block diagram for explaining functional processing of the pre-activation server shown in FIG. 5 .
• 6 is a flowchart showing an example of a sequence by the pre-activation server shown in FIG. 5 .
• FIG. 6 is a block diagram illustrating functional processing by the dynamic QR server shown in FIG. 5 .
• 6 is a flowchart illustrating a functional process performed by the dynamic QR server shown in FIG. 5 .
• 1 is a flowchart showing an activation process procedure in the NFC card processing system according to the embodiment.
• 1 is a flowchart showing an activation process procedure in the NFC card processing system according to the embodiment.
• 10 is a flowchart showing a token acquisition processing procedure performed by a token transmission processing server in the NFC card processing system according to the embodiment.
• 10 is a flowchart showing a token acquisition processing procedure performed by a token transmission processing server in the NFC card processing system according to the embodiment.
• FIG. 1 is a plan view illustrating the configuration of a data processing device in an NFT distribution system according to this embodiment.
• the data processing device is configured to be able to communicate with an exchange system that trades crypto assets via a specified communication medium.
• 1 is a data terminal equipped with hardware resources described below, which performs processing for writing and reading data to a specified standardized NFC card. Note that although this example uses Ethereum, it is possible to communicate with exchanges that handle other cryptocurrencies.
• 2 is a card placement section, where new NFC cards and processed NFC cards with information already written to them are placed.
• 3 is the NFC card itself, equipped with hardware resources described below.
• 4 is a key input device, where the user inputs numeric and alphabetical information by keying, as well as a PIN code.
• the display 5 is a display device that displays information to be input to the NFC card 3 placed on the card placement section 2, and displays the contents of information already stored in the NFC card 3.
• the display format is a list, but by providing a GUI function, it is also possible to display a wide variety of icons.
• the NFC card 3 also includes identification information displayed on the front and/or back of the card, and a contact pad. It is configured to establish contact with other communication devices such as the data terminal 1.
• the NFC card 3 includes a predetermined memory unit, a data communication processing circuit, and an antenna unit.
• FIG. 2 is a block diagram explaining the hardware configuration of the data terminal 1 shown in FIG. 1.
• the data terminal 1 comprises a CPU 1A, a ROM 1B, a RAM 1C, and an input/output interface circuit 1D, which communicates with an input/output interface circuit 4B of the key input device 4 to control data exchange.
• Numeric keys and letter keys are assigned to the keypad section 4A.
• the communication interface (communication I/F) 1E is connected to a specified network via the WiFi port 10 and is configured to be capable of two-way communication with, for example, a data terminal 1 of an exchange that handles crypto assets.
• the NFT distribution system configured as described above is an NFT distribution system in which the NFC card 3 and the data terminal 1, which communicates with the NFC card 3 by close proximity wireless communication, communicate with each other by close proximity wireless communication.
• the data terminal 1 has an encryption function that creates a private key for using the NFC card 3 as a wallet for managing owned NFTs and encrypts the created private key, and a controller that erases the private key from the memory unit of the NFC card 3 and writes address information for trading NFTs to the memory unit of the NFC card 3 when the private key encrypted by the encryption function has been written to the storage medium of the NFC card 3, and performs data processing as shown in the following flowchart.
• [NFC card creation process] 3 is a flowchart showing an example of a data processing procedure of the data processing device in the NFT distribution system according to the present embodiment. Each step is realized by the CPU 1A expanding a control program stored in the ROM 1B into the RAM 1C and executing it. First, the NFC card creator places the NFC card 3 on the card placement section 2 of the data terminal 1 and issues an instruction to read it (1).
• the CPU 1A judges whether the NFC card 3 placed on the card placement unit 2 is a new card or is already in a state where NFT can be operated, based on the writing state of the identification information stored in the rewritable section of the NFC card 3 (2). If it is judged that the NFC card 3 is not a new card, a message is displayed on the display device 5 inquiring whether it is OK to overwrite the data in the rewritable section of the NFC card 3. If the CPU 1A judges that the user has answered NO to the inquiry, the process returns to step (1).
• the CPU 1A determines in step (3) that overwriting is acceptable, it sets a flag for unlocking the card lock set in the rewritable section of the NFC card 3, unlocks the card lock state (4), and proceeds to step (5).
• the CPU 1A determines in step (2) that the placed NFC card 3 is a new card, it executes an application (not shown) to generate a private key required for manipulating the cryptocurrency (5).
• the user operates the key input device 4 to input, for example, a four-digit number (6).
• This number is used to encrypt a private key for searching and displaying crypto assets and NFTs.
• CPU 1A uses the four-digit number entered in step (6) to generate a hash consisting of a predetermined number of bits, and encrypts (7) the private key generated in step (5).
• step (7) the private key encrypted in step (7) is written to the non-volatile memory section of the NFC card 3 (8).
• CPU 1A locks NFC card 3 (9) so that the data on NFC card 3 cannot be accessed without specifying the four-digit number entered in step (6).
• CPU 1A erases the temporarily stored private key generated in step (5) and the private key encrypted in step (7) from non-volatile memory unit RAM 1C (10), stores only address information for referencing the NFT in the database (DB) (11), and ends this process.
• a user capable of manipulating crypto assets can simply place a new NFC card 3 on the card placement section 2, and record a private key used to manipulate crypto assets and NFTs onto the card, instantly creating an NFC card 3 with wallet functionality.
• [Private key acquisition process] 4 is a flowchart showing an example of the data processing procedure of the data processing device in the NFT distribution system according to this embodiment.
• (21) to (26) indicate each step, and each step is realized by the CPU 1A expanding a control program stored in the ROM 1B into the RAM 1C and executing it.
• the NFC card holder places (sets) the NFC card 3 on the card placement section 2 of the data terminal 1 and issues an instruction to read it (21).
• the CPU 1A judges whether the NFC card 3 placed on the card placement unit 2 is a new card or is already in a state where NFT can be operated (23) based on the written state of the identification information stored in the rewritable portion of the NFC card 3. If the CPU 1A judges that the NFC card 3 is a new card, it displays a message on the display device 5 requesting that a written card be inserted (22) and returns to step (21).
• step (22) the key input device 4 is operated to input, for example, a four-digit number (24).
• CPU 1A uses the numerical information input in step (24) to execute a process to decrypt the encrypted private key recorded on NFC card 3 (25).
• the decrypted private key is displayed on display device 5 (26), and this process ends.
• the cardholder does not need to know anything about the contents of the private key.
• manipulating the private key which can be confirmed by entering a PIN, and connecting to an exchange account set up to confirm the contents of the crypto assets, the cardholder can perform operations on the NFTs and crypto assets they own through the display device 5.
• this system can handle any cryptocurrency, including Bitcoin (BTC: registered trademark), Ethereum (ETH: registered trademark), Litecoin (LTC), and Monacoin (MONA: registered trademark).
• cryptocurrency including Bitcoin (BTC: registered trademark), Ethereum (ETH: registered trademark), Litecoin (LTC), and Monacoin (MONA: registered trademark).
• Second Embodiment 5 is a block diagram for explaining the configuration of an NFC card processing system according to this embodiment.
• an activation processing method will be described in detail using as an example an NFC card processing system in which a data terminal 1 performs near field wireless communication with an NFC card 3, an example of which is shown in the first embodiment, via a predetermined communication medium (network NET), and the data terminal 1 performs activation processing of the NFC card 3 read by the data terminal 1 in cooperation with multiple system management servers.
• network NET predetermined communication medium
• a smartphone equipped with an IC chip capable of reading an NFC card 3 is used as an example of the data terminal 1, but the data terminal 1 is not limited to this and may include various PAD devices equipped with wireless communication functions.
• SB1 is a blockchain server, which is made up of multiple virtual currency management servers managed by an exchange (not shown). Examples of virtual currencies include Ethereum, Polygon, and Aster.
• SB2 is an ownership confirmation server that performs ownership confirmation processing for users who own NFC card 3 based on the procedure described below.
• SB3 is a dynamic QR server that executes a process to display a QR page identified by a QR code (registered trademark) on a display terminal based on the procedure described below.
• QR code registered trademark
• SB4 is a blockchain patrol server that executes blockchain patrol processing based on the procedure described below.
• SB5 is a pre-activation server that executes the process to determine the validity of NFC card 3.
• the blockchain server SB1, ownership confirmation server SB2, dynamic QR server SB3, blockchain patrol server SB4, and pre-activation server SB5 are equipped with hardware resources (CPU, RAM, large capacity memory, network control system, etc.) for connecting to a network as a computer system and executing specified data processing, but details thereof are omitted.
• the blockchain server SB1, ownership confirmation server SB2, dynamic QR server SB3, blockchain patrol server SB4, pre-activation server SB5, token transmission processing server SB6, and activation server SB7 are examples of system management servers.
• FIG. 6 is a block diagram explaining the functional processing of the ownership confirmation server SB2 shown in FIG. 5. Each unit is realized by executing software stored in the storage unit.
• 61 is an ownership database (ownership DB) in which NFC card owners are registered.
• 62 is an NFT viewing function processing unit that provides an NFT viewing function processing service to the owner of the NFC card 3 registered in the ownership database (ownership DB) 61.
• 63 is an NFT display function processing unit that provides an NFT display function processing service to the owner of the NFC card 3 registered in the ownership database (ownership DB) 61.
• FIG. 7 is a flowchart showing an example of an ownership confirmation sequence by the ownership confirmation server SB2 shown in FIG. 5. (71) to (75) indicate each step.
• the data terminal 1 displays a link destination for connecting to the ownership confirmation server SB2 via a wireless network according to the contracted carrier as a display button on the smartphone screen, and when the user taps the display button (72), a request to obtain the ownership information page registered by the user is notified to the ownership confirmation server SB2.
• the ownership confirmation server SB2 responds to this, searches the database based on the address information of the link sent from the data terminal 1 operated by the user (73), reads out the ownership information page of the NFT, and returns it to the data terminal 1 operated by the user (74).
• the controller unit of the data terminal 1 displays the ownership information page of the NFT stored and managed by the ownership confirmation server SB2 on the screen of the data terminal 1 operated by the user (75).
• FIG. 8 is a block diagram explaining the functional processing of the preactivation server SB5 shown in FIG. 5.
• Each unit is realized by a controller configured as a hardware resource executing software (programs) stored in a storage unit.
• preactivation database (preactivation DB), which stores information required for the card activation process required for preactivation of the NFC card 3.
• DB management function processing unit which performs a service of providing a pre-activation page registered in the pre-activation DB 81 to the data terminal 1 operated by the user.
• FIG. 9 is a flowchart showing an example of a sequence by the preactivation server SB5 shown in FIG. 5. (81) to (86) indicate each step.
• the preactivation server SB5 When the preactivation server SB5 receives a notification from the ownership confirmation server SB2 that the ownership confirmation process has been completed, it transmits a preactivation page to the user operating the data terminal 1 (81). Next, the user performs an operation to open the preactivation page notified by the preactivation server SB5 (82) and holds the NFC card 3 over the IC chip reader of the data terminal 1 (83), and the NFC information stored in the NFC card 3 is transmitted to the preactivation server SB5.
• the preactivation server SB5 When the preactivation server SB5 receives the transmitted NFC information, it executes a process of storing the UID (universal identification number) extracted from the NFC information in the preactivation DB81 (84), and the preactivation server SB5 transmits the result of determining whether or not to store the UID (universal identification number) to the data terminal 1 operated by the user (85).
• the controller unit of the data terminal 1 operated by the user displays either the success or failure of the save sent from the preactivation server SB5 (86).
• FIG. 10 is a block diagram explaining the functional processing by the dynamic QR server SB3 shown in FIG. 5. Each unit is realized by executing software stored in the storage unit.
• 101 is a QR image generation function processing unit, and the dynamic QR server SB3 shown in FIG. 5 executes a process to generate a QR code (registered trademark) used to receive token information by the token transmission processing server SB6 described later.
• QR code registered trademark
• the display terminal 102 is a display terminal that displays the QR code (registered trademark) generated by the dynamic QR server SB3.
• the display terminal 102 is the screen of the data terminal 1 operated by the user, but may be another display device.
• FIG. 11 is a flowchart explaining the functional processing by the dynamic QR server SB3 shown in FIG. 5. Note that (111) to (113) indicate each step.
• the dynamic QR server SB3 working together as an NFC card processing system receives a notification from the preactivation server SB5 that preactivation has been completed effectively, it immediately generates a QR code (registered trademark) to be used in the token transmission process (111) and transmits it to the display terminal 102 via the network NET. As a result, the QR page is displayed on the display terminal 102 (112). Next, the page is automatically updated at regular intervals (113) and the process returns to step (111).
• a QR code registered trademark
• FIG. 12 is a block diagram explaining the correspondence of databases referenced by the blockchain crawl server SB4 shown in FIG. 5.
• it includes a crawl database (crawl DB) 1201 and an ownership database (ownership DB) 1202.
• crawl database (crawl DB) 1201 records data on how much data has been read on the blockchain.
• an integer value called a block number that uniquely indicates the location of data in the blockchain is recorded.
• the ownership database 1202 records data about which users own which tokens.
• a string that uniquely identifies the token
• an integer value token ID
• the owner's address information are stored.
• the blockchain records all token owners and their transitions, but the ownership database 1202 records only the ownership information at the time of last confirmation, which was created based on the data on the blockchain.
• FIG. 13 is a flowchart explaining the functional processing by the blockchain patrol server SB4 shown in FIG. 5. Note that (1301) to (1305) indicate each step.
• the blockchain crawling server SB4 acquires information from the crawl DB 1201 and the blockchain 1201-1 shown in FIG. 12 (1301), determines whether it has read up to the latest block (1302), and if it determines that it has read up to the latest block, proceeds to (1305), waits for a predetermined time (e.g., one minute) (1305), and then returns to step (1301).
• a predetermined time e.g., one minute
• step (1302) if it is determined in step (1302) that the most recent block has not been read, a process is executed to read information until the most recent block is reached (1303).
• a process is executed to write the latest information to the ownership DB 1202 (1304), and the process proceeds to step (1305).
• the latest token owner information similar to that recorded on the blockchain, is stored in the ownership DB.
• this ownership DB By referencing this ownership DB, when this system and related systems need to refer to token owner information, the latest token owner information can be obtained faster and at lower cost than by referencing the blockchain.
• FIGS. 14 and 15 are flowcharts showing the activation process procedure in the NFC card processing system according to this embodiment.
• (1401) and (1402) indicate the steps executed by the server-side controller
• (1421) to (1430) indicate the steps executed by the user terminal-side controller.
• the activation server SB7 in this process may be configured so that the activation server SB5 also performs the functional processing.
• the data terminal 1 reads the information of the NFC tag stored in the NFC card 3 (1421) and transmits the NFC information to the activation server SB7 via the network NET by wireless communication.
• the activation server SB7 checks whether the UID matches the UID registered in the preactivation DB81 shown in Figure 8 (1401).
• the activation server SB7 transmits to the data terminal 1 the result of its determination as to whether or not the UID included in the NFC information transmitted in step (1421) has been registered.
• the data terminal 1 determines (1422) whether the UID included in the NFC information sent in step (1421) from the activation server SB7 has already been registered, i.e., whether it has been preactivated.
• the data terminal 1 determines that the UID included in the NFC information sent in step (1421) has not already been registered, it displays a message on the data terminal 1 indicating that pre-activation has failed (1423) and ends the process.
• step (1422) if it is determined in step (1422) that the UID included in the NFC information sent in step (1421) has already been registered, the activation application installed in the data terminal 1 is started and a key pair is generated (1424).
• the user follows the password entry prompts displayed on the display screen of the data terminal 1 and enters the desired password (8 or more characters, including uppercase and lowercase alphanumeric characters and symbols) (1425).
• step (1424) the secure area of the NFC tag generated in step (1424) is locked and stored with the given password, and the password generated in step (1425) is stored in a secure area within the app (1426).
• the public key (address) and UID generated in step (1424) are sent with a signature to the preactivation server SB7 (1427).
• the activation server SB7 verifies the signature sent from the data terminal 1 operated by the user in step (1427), and executes a process of linking the UID to the public key (address) and storing it in the activation DB81-2 (1402).
• the activation server SB7 sends a result indicating whether the public key and UID sent from the data terminal 1 in step (1427) have been successfully saved to the pre-activation DB 81-2 or whether the saving process has not been successfully completed, as a code indicating success or failure.
• the data terminal 1 determines whether the registration process sent from the activation server SB7 was successful or unsuccessful, i.e., whether a success was sent (1428), and if it is determined that the transmission was successful, a message indicating that the activation was successful is displayed on the screen of the data terminal 1 (1429), and the process ends.
• step (1428) if it is determined in step (1428) that the registration process sent from activation server SB7 has failed, a message indicating that activation has failed is displayed on the screen of data terminal 1 (1430), and processing ends.
• 16 and 17 are flowcharts showing the token acquisition process steps performed by the token transmission processing server SB6 in the NFC card processing system according to this embodiment. Note that (1511) and (1512) indicate the steps on the server side, and (1501) to (1508) indicate the steps on the data terminal 1 side.
• the data terminal 1 reads the QR code (registered trademark) received from the dynamic QR server SB3 shown in FIG. 5 or the NFC tag stored in the NFC card 3 (1501).
• the data terminal 1 requests and obtains token information from the token transmission processing server SB6 (1502), and the token transmission processing server SB6 returns the token information read from the token information DB 1202-2 to the data terminal 1 (1511).
• step (1502) the data terminal 1 acquires token information from the token transmission processing server SB6.
• the data terminal 1 selects an NFC tag from the received token information and holds the NFC card 3 over the data terminal 1 (1503).
• the data terminal 1 reads the password stored in the secure area of the app, and reads the private key stored in the secure area of the NFC tag (1504).
• the controller of the data terminal 1 transmits the UID and the token information received from the token transmission processing server SB6 in step (1502) to the token transmission processing server SB6 with a signature using a private key (1505).
• the token transmission processing server SB6 verifies the signature sent from the data terminal 1 and starts the process of sending the token to the target address (1512).
• the data terminal 1 determines whether the token transmission processing server SB6 has received information from the token transmission processing server SB6 indicating whether the reading of information from the blockchain 1202-1 or the ownership DB 61 was successful (1506), and if the controller of the data terminal 1 determines that the reading was not successful, it displays a message indicating that the reading of information from the blockchain 1202-1 or the ownership DB 61 has failed (1508) and ends the processing.
• the controller of the data terminal 1 determines in step (1506) that the operation was successful, it displays (1507) a message indicating that the information was successfully read from the blockchain 1202-1 or the ownership DB 61, and ends the process.
• step (1427) of FIG. 15 it is possible to prevent anyone other than the private key owner from illegally registering the public key (address) in the database.
• step (1512) of FIG. 16 it is possible to verify that the card holder is the intended recipient of the token.
• An NFT distribution system in which a specific NFC card and a data terminal that communicates with the NFC card by close proximity wireless communication are connected, the data terminal having an encryption means that creates a private key for using the NFC card as a wallet for managing owned NFTs and encrypts the created private key, and a control means that, when the encryption means has written the encrypted private key to a storage medium of the NFC card, erases the private key from the storage medium and controls the writing of address information for trading the NFT to the storage medium.
• a method for creating a wallet card in an NFT distribution system in which a specific NFC card and a data terminal that communicates with the NFC card through close proximity wireless communication comprising: an encryption step in which the data terminal creates a private key for using the NFC card as a wallet for managing owned NFTs, and encrypts the created private key; and a control step in which, with the private key encrypted in the encryption step written to a storage medium of the NFC card, the private key is erased from the storage medium, and address information for trading the NFT is written to the storage medium.
• An activation processing method for an NFC card processing system including a data terminal that performs near field wireless communication with an NFC card via a specified communication medium, and an activation processing method for the NFC card read by the data terminal in cooperation with a plurality of system management servers, the method comprising: a first registration step of performing a preactivation process on the NFC card via any one of the plurality of system management servers and registering the UID of the NFC card in a preactivation database; and a second registration step of performing an activation process on a processed NFC card for which preactivation processing has been completed via any one of the plurality of system management servers, and linking and registering a public key generated in the activation database with the UID.
• the public key is generated by an application launched on the data terminal.
• the multiple system management servers include a first system management server that performs a preactivation process on the NFC card, a second system management server that performs an activation process on the NFC card, a third system management server that links virtual currency information to a blockchain and manages it, and a fourth system management server that manages ownership information of the NFC card.
• the data terminal when communicating with a second system management server that performs activation processing for the NFC card, it includes a determination step of determining whether the NFC card has already been preactivated; if it is determined in the determination step that the NFC card has already been preactivated, it includes a generation step of generating a pair of keys of a private key and the public key; an input step of inputting a desired password; a storage step of locking and storing the private key in a secure area of the NFC tag with the given desired password and storing the desired password in a secure area within an application; and a transmission step of transmitting the public key and UID with a signature to one of the system management servers.

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• 2023
  • 2023-12-12 JP JP2024523893A patent/JPWO2024128208A1/ja active Pending
  • 2023-12-12 WO PCT/JP2023/044356 patent/WO2024128208A1/ja not_active Ceased

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