JP7229410B1 - Product transaction support device and product transaction support method - Google Patents

Abstract

An object of the present invention is to prevent the authenticity of merchandise from being damaged by a third party in the distribution of merchandise, and to enable users to easily verify the authenticity of merchandise with a flexible configuration.
A product holding unit (11) capable of storing products (2) and a control unit (12) having an IC reader (13) capable of reading the contents of an IC chip (21) attached to the product (2). The product 2 stored in the product holding unit 11 is locked so that it cannot be taken out, the challenge sent from the user terminal 3 is sent to the IC chip 21, and the proof sent from the IC chip 21 is sent to the user terminal. 3, receives an unlock request from the user, sends the NFT 22 to the wallet corresponding to the user, and unlocks the product 2 stored in the product holding unit 11 so that it can be taken out.
[Selection drawing] Fig. 1

Description

TECHNICAL FIELD The present invention relates to technology for trading and distribution of products, and more particularly to technology effective when applied to a product transaction support device and product transaction support method that enable verification of the authenticity of products.

Physical products acquired by users through purchases, etc., are those that go through multiple stages of transportation and distribution routes from the time they are produced or manufactured until they are put on the market, and those that are distributed from time to time in the market, such as second-hand goods. be. It is important for users who acquire such products to be able to confirm whether or not the product is genuine.

Regarding the technology that enables the authenticity of products to be confirmed, for example, Japanese Patent Application Laid-Open No. 2002-104617 (Patent Document 1) discloses that instead of conventional guarantees, appraisals, etc., and attach an IC tag to each product as a product identification tool that is extremely difficult to forge manufactured under its management, and trust the information recorded on the IC tag and the process from manufacturing to distribution of the product. It describes a mechanism that guarantees the authenticity of products by centrally managing the database of the guarantee institution and connecting to the information system of the credit guarantee institution with a dedicated inspection terminal to determine the authenticity of the product. there is

In addition, Japanese Patent No. 5816393 (Patent Document 2) requests the user to take an image of the characteristic part of the product that enables discrimination between genuine products and counterfeits in electronic commerce such as internet auctions. Then, by outputting an evaluation result based on the photographed image photographed by the user and the authentic image, it is possible to suppress counterfeits from being traded.

Japanese Patent Application Laid-Open No. 2002-104617 Japanese Patent No. 5816393

According to the conventional technology as described above, it is possible to verify the authenticity of the product acquired by the user.

However, with the technique described in Patent Document 1, for example, it is necessary to provide a centralized credit guarantee institution in order to realize the mechanism. In addition, a third party may modify the product or replace the IC tag with a different product while the product is being handed over from the owner/manager to the next owner/manager (for example, during transportation). It is difficult to prevent damage to the authenticity of goods by

In addition, the technology described in Patent Document 2 requires the user who acquires the product to take a photograph of its appearance. end up In addition, it is difficult to grasp the route and process of how the product has been distributed from time to time.

Accordingly, the object of the present invention is to prevent third parties from damaging the authenticity of products in the distribution of actual products, and to enable users to easily verify the authenticity of products with a flexible configuration. An object of the present invention is to provide a product transaction support device and a product transaction support method that make it possible.

The above and other objects and novel features of the present invention will become apparent from the description of the specification and the accompanying drawings.

A brief outline of typical inventions disclosed in the present application is as follows.

A commodity transaction support device, which is a representative embodiment of the present invention, is a commodity transaction support device that supports delivery of a commodity from a first subject to a second subject, and has a structure capable of storing the commodity. and a control unit having an IC reader capable of reading the content of an IC chip attached to the product stored in the product holding unit.

The control unit locks the product stored in the product holding unit so that it cannot be taken out, and receives a challenge for verifying the authenticity of the product transmitted from the information processing device relating to the second subject. the proof is transmitted to the IC chip via the IC reader, and in response to the proof transmitted from the IC chip via the IC reader is received, the proof is transmitted to the information processing device, In response to a request for unlocking by the second subject, the NFT is sent to the wallet corresponding to the second subject on the blockchain, and when the sending is completed, it is stored in the product holding unit Unlock the product so that it can be taken out.

The present invention can also be applied to a commodity transaction support method using the commodity transaction support device described above.

Among the inventions disclosed in the present application, the effects obtained by representative ones are briefly described below.

That is, according to the representative embodiment of the present invention, it is possible to prevent the authenticity of the product from being damaged by a third party in the distribution of the actual product. In addition, the user can easily verify the authenticity of the product with a flexible configuration.

BRIEF DESCRIPTION OF THE DRAWINGS It is the figure which showed the outline|summary about the structural example of the commodity transaction assistance apparatus which is one embodiment of this invention. (a), (b) is the figure which showed the outline|summary about the specific example of the goods holding|maintenance part in one embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining the outline|summary about the transfer of goods in one embodiment of this invention, and the example of the method of authenticity verification. FIG. 4 is a diagram showing an overview of an example of the flow of processing from manufacturing a product to storing it in a product holding unit and locking it according to one embodiment of the present invention; FIG. 2 is a diagram showing an overview of an example of the flow of processing up to delivery of a product to the next owner in one embodiment of the present invention; FIG. 4 is a diagram showing an overview of an example of the flow of product authenticity verification processing in one embodiment of the present invention. It is a figure explaining an outline about an example of transfer of goods in one embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In principle, the same parts are denoted by the same reference numerals throughout the drawings for describing the embodiments, and repeated descriptions thereof will be omitted. On the other hand, parts that have been described with reference numerals in one drawing may be referred to with the same reference numerals, although they are not shown again in the description of other drawings.

<Overview>
In recent years, the use of NFTs (Non-Fungible Tokens) has been spreading as a technology using blockchain technology. By using NFTs, it is possible to prove that digital assets that are easy to duplicate are original and who owns them.

A product transaction support device (smart box) and a product transaction support method according to an embodiment of the present invention hold real assets (products) by storing them in a box or the like, and associate NFT with the product. , to realize a mechanism that allows users to verify the authenticity of the product and its distribution and transaction process. Then, by storing the product in a box or the like and locking it so that it cannot be taken out until predetermined conditions such as verification of authenticity and payment of the price are met, the authenticity of the product is damaged between transactions. It is a deterrent to

In addition, in the present embodiment described below, the subject of the transaction is described as a commodity with the sale in mind.

<Configuration>
FIG. 1 is a diagram showing an overview of a configuration example of a commodity transaction support device according to one embodiment of the present invention. The product transaction support device 1 is composed of, for example, a product holding unit 11 and a control unit 12. Through the control unit 12, the product transaction support device 1 communicates with a user terminal 3 such as a smartphone held by a user, and uses a block chain 4 on the Internet. has a configuration that allows access to

The product holding unit 11 is implemented by a box-shaped structure that can hold the product 2 and restrain it. A control unit 12, which will be described later, controls a locking/unlocking (lock/unlock) mechanism (not shown) to hold and restrain the product 2 so that it cannot be taken out, or to release it so that it can be taken out. As long as the product 2 can be held/released, the shape is not limited to the box shape, and an appropriate structure such as a tray-like structure or a structure that is only fixed with a hook or a band can be used. A specific example of the product holding unit 11 will be described later.

The control unit 12 is implemented, for example, by an integrated circuit, a device, or the like installed in a structure that constitutes the product holding unit 11, and controls the locking/unlocking of the product holding unit 11 to hold the product 2 as described above. / has the function to release. It also has various parts such as an IC reader 13, a communication part 14, and a wallet management part 15, and realizes various functions related to authenticity verification of the product 2 using NFT.

The IC reader 13 is a reader device that reads the contents of an IC card or an IC chip in a contactless manner according to the NFC (Near Field Communication) standard. The content of the IC chip 21 attached to the product 2 is read. The communication unit 14 is a device that communicates with the user terminal 3 by wireless communication such as a wireless LAN or Bluetooth (registered trademark). 13 transmits the read data to the user terminal 3. The wallet management unit 15 is implemented as software having a wallet function for browsing and manipulating data related to the target product transaction support device 1 on the blockchain 4 . Through this function, the product transaction support device 1 can access the NFT 22 on the block chain 4.

FIG. 2 is a diagram showing an outline of a specific example of the commodity holding section 11 according to one embodiment of the present invention. As described above, the product holding unit 11 that stores and holds/releases the product 2 may be, for example, a box-shaped structure (smart box). As shown in FIG. 2( a ), it can be configured as a coin-operated locker, and each locker therein can be configured as an independent individual commodity holding portion 11 . In this case, as shown in the figure, the entire coin locker may be configured as one commodity transaction support device 1 having a plurality of commodity holding units 11, or each individual locker may be configured as an independent commodity transaction support device 1. good.

For example, as shown in FIG. 2B, each locker (commodity holding unit 11) can store the commodity 2 inside after opening the door. Locking/unlocking of the door is controlled by a control unit 12 (not shown). An IC reader 13 is installed on the bottom portion where the product 2 is placed, and the contents of the IC chip 21 attached near the bottom surface of the product 2 can be read. In the drawing, the IC chip 21 is shown attached to the side surface of the product 2 for convenience, but it may be attached to a position where the IC chip 21 can be read by the IC reader 13, such as the bottom surface or inside the product 2. . Also, the IC reader 13 is not limited to be installed near the bottom surface, and may be installed on the side surface or the ceiling surface. In addition, it is not limited to the configuration in which one commodity 2 is stored in one locker as shown in the figure, and a configuration in which a plurality of IC readers 13 are installed in one commodity holding section 11 to store a plurality of commodities 2 is possible. good too.

In this embodiment, the IC chip 21 is separately attached to the product 2. However, the present invention is not limited to such a structure, and information corresponding to the product 2 can be recorded and read by contact/non-contact. As far as the configuration is concerned, for example, a configuration using an IC chip, memory, or other recording medium provided as standard in the product 2 itself may be used.

<Transfer of rights and verification of authenticity>
FIG. 3 is a diagram for explaining an overview of an example of a technique for transferring and verifying the authenticity of the product 2 according to one embodiment of the present invention. A manufacturer 5 of the product 2 stores the product 2 to which the IC chip 21 is attached in the product holding unit 11 (having a box shape in the example of FIG. 3) of the product transaction support device 1 . Along with this, the manufacturer 5 issues the NFT 22 corresponding to the product 2 on the blockchain 4 and sends it to the wallet of the product transaction support device 1 . As a result, the ownership of the product 2 and the NFT 22 is transferred from the manufacturer 5 to the product transaction support device 1, and the product transaction support device 1 locks the product holding unit 11 so that the product 2 cannot be taken out. do. Depending on the relationship between the operating entity of the product transaction support device 1 and the manufacturer 5, the ownership of the product 2 itself may continue to be owned by the manufacturer 5, but the management entity, management location, and management authority (hereinafter referred to as “management may be collectively referred to as "rights") may be transferred to the commodity transaction support device 1.

A user who intends to acquire this product 2 by purchasing or the like wants to verify that the product 2 is genuine and associated with the NFT 22 . In the present embodiment, since the authenticity of the product 2 held in the product holding unit 11 is verified, the details will be described later. Authenticity is verified by a so-called zero-knowledge proof protocol in which a question (challenge) is thrown to the commodity transaction support device 1 and whether or not a correct answer (proof) is returned is determined.

When the authenticity is verified, the user pays the price by a predetermined means according to the specifications of the commodity transaction support system 1. FIG. As a result, the NFT 22 on the block chain 4 is sent to its own wallet, and the product transaction support device 1 unlocks the product holding unit 11 so that the user can take out the product 2.

Note that the payment means for the price is not particularly limited. For example, if the product transaction support device 1 is a coin locker type as shown in FIG. Alternatively, payment may be made by sending virtual currency (cryptographic assets) to the wallet of the product transaction support device 1 on the blockchain 4 or to a smart contract prepared for transactions. By paying in advance by another means, the QR code (registered trademark, hereinafter the same) etc. of the voucher is acquired, and this is read by a reading unit (not shown) of the commodity transaction support device 1, or the data of the voucher is transmitted. It may be configured to indicate that the payment is completed by doing.

<Process flow>
FIG. 4 is a diagram showing an overview of an example of the flow of processing from manufacturing the product 2 to storing it in the product holding unit 11 and locking it according to one embodiment of the present invention. The left side of the figure shows the processing in the physical world, and the right side shows the flow of processing on the blockchain 4.

First, the manufacturer 5 manufactures the product 2 (S01). In the present embodiment, it is assumed that a genuine product is newly manufactured, but assuming that a specific second-hand product is newly distributed, its authenticity (that the target product 2 is the specific second-hand product) can be verified. It may be something to do.

The manufacturer 5 issues a pair of private key (Pri) and public key (Pub) to the manufactured genuine product 2 using its own information processing system using a known public key encryption method (S02). . Specifically, for example, when using zero-knowledge proof by the Schnorr protocol, a generator g and a prime number p are set, a random number r is generated, a private key Pri is also randomly selected, and public keys Pub1 and Pub2 are generated. ,Each,
Pub1=g^Pri mod p
Pub2=g^r mod p
(hereinafter, the set of public keys Pub1 and Pub2 may be referred to as Pub). Then, after storing the issued private key Pri (and each value of the generator g, prime number p, and random number r) in the IC chip 21, the IC chip 21 is attached to the product 2 (S03).

On the other hand, the manufacturer 5 newly creates and issues (Mint) the NFT 22 on the block chain 4 using its own information processing system (S04). At this time, the public key Pub issued in step S02 is given as an attribute in the smart contract of the NFT 22. In this embodiment, in order to improve security against so-called replay attacks, the NFT 22 is equipped with a contract that allows the owner of the NFT 22 to update Pub2 of the public keys Pub.

The minted NFT 22 is sent to the wallet of the product transaction support device 1 storing the product 2 (S05). This associates the product 2 with the NFT 22 . In addition, if the party to whom the commodity 2 is delivered first, such as the purchaser of the commodity 2 or the commodity transaction support device 1, has already been determined, minting may be performed while the management right of the NFT 22 is transferred to the party concerned. . In addition, in the present embodiment, the public key Pub is configured to be registered in the NFT 22, but it is not limited to this, and may be configured to be recorded in the form of information on the blockchain 4 associated with the product 2. can.

If the manufacturer 5 stores the product 2 attached with the IC chip 21 in the product holding unit 11 of the product transaction support device 1, and the IC reader 13 of the product transaction support device 1 can correctly read the contents of the IC chip 21 ( S06), the control unit 12 of the product transaction support device 1 locks the product holding unit 11 so that the product 2 cannot be taken out (S07). Through the above series of processing, the management right (or ownership) of the product 2, that is, the physical control of the product 2 and the subject of holding the corresponding NFT 22 are transferred from the manufacturer 5 to the product transaction support device 1. Become.

FIG. 5 is a diagram showing an overview of an example of the flow of processing up to delivery of product 2 to the next owner in one embodiment of the present invention. Here, the process until the next owner, such as the purchaser of the product 2, takes out and acquires the product 2 from the product transaction support device 1 in which the product 2 is stored in the product holding unit 11 and is locked. An example flow is shown. Similar to FIG. 4, the left side of the figure shows the processing in the physical world, and the right side shows the flow of processing on the blockchain 4.

The user, who will be the next owner of the product 2 held in the product transaction support device 1, first checks the authenticity of the target product 2, that is, the NFT 22 on the blockchain 4 is the target product through the user terminal 3. 2 (S11). The specific content of this verification process will be described later, but it can be performed, for example, by the so-called zero-knowledge proof protocol as described above.

When the authenticity of the target product 2 can be confirmed, the next owner requests the product transaction support device 1 to unlock it by a predetermined means (S12). For example, an unlocking request can be made by performing processing related to payment of the price of the product 2, and as described above, the product transaction support device 1 receives the QR code of the voucher obtained by paying the price in advance. The virtual currency (cryptographic asset) for payment is read by a reading unit (not shown) provided, or operated on the user terminal 3 to the wallet of the commodity transaction support device 1 on the block chain 4, or to the smart contract prepared for the transaction. An action such as remittance can be used as an unlocking request.

If the unlocking request meets predetermined conditions, such as when the QR code of a valid voucher is read, or when a sufficient amount of money is paid on the blockchain 4, the commodity transaction support on the blockchain 4 Send the target NFT 22 from the wallet of the device 1 to the next owner's wallet (S13), and wait until the sending of the NFT 22 is completed, that is, the transaction/payment is confirmed (for example, the finality is satisfied). (S14). When the sending of the NFT 22 is completed, the control unit 12 of the product transaction support device 1 unlocks the product holding unit 11 (S15) to release the product 2 so that the next owner can take it out. Through the above series of processing, the next owner can take out the product 2 from the product transaction support device 1, and the physical control of the product 2 and the holding of the corresponding NFT 22 can be transferred from the product transaction support device 1 to the next owner. will go to the owner.

FIG. 6 is a diagram showing an overview of an example flow of authenticity verification processing (step S11 in FIG. 5) of the product 2 according to one embodiment of the present invention. In the present embodiment, as described above, the verification of the authenticity of the commodity 2 is performed by asking the commodity transaction support apparatus 1 a question (challenge) that can only be answered by (the IC chip 21 attached to) the genuine commodity 2. and determine whether or not a correct answer (proof) is returned.

First, the user (the user terminal 3 of the user) who will be the next owner of the product 2 held in the product transaction support device 1 generates a random number to be used as the challenge c (S111), is transmitted to the control unit 12 via the communication unit 14 (S112). The control unit 12 transmits the received challenge c to the IC chip 21 attached to the product 2 via the IC reader 13 (S113).

The IC chip 21 generates the proof Pf from the received challenge c, the private key Pri generated in step S02 of FIG.
Pf=r−Pri×c
(S114). At this time, although it is not essential for the zero-knowledge proof protocol, as additional processing for enhancing security against so-called replay attacks, etc., a random number r' is generated before calculating Pf, and public key Pub2' is generated. ,
Pub2'=g^r' mod p
and after updating Pub2 in the attribute of NFT 22 with the value of Pub2' by the wallet management unit 15, Pf is calculated by replacing r in the above Pf calculation formula with r' good.

After that, the proof Pf is transmitted to the control section 12 of the commodity transaction support device 1 via the IC reader 13 (S115).

The control unit 12 transmits the received proof Pf to the user terminal 3 via the communication unit 14 (S116). The user terminal 3 that has received the proof Pf acquires the public key Pub from the NFT 22, and performs the following equivalence verification,
(ĝPf)×(Pub1̂c) mod p==Pub2
is true (S117). That is, it is confirmed that the result of the power calculation where g is the base and Pf is the exponent and the public key Pub1 multiplied by the c-th power matches the public key Pub2. If they match, it means that the correct proof Pf has been returned to the challenge c, which means that the authenticity of the product 2 held in the product holding unit 11 of the product transaction support device 1 (management rights of the product 2 and the NFT 22 (or It means that it is confirmed that the ownership is linked). Since the public keys Pub1 and Pub2 are written in the NFT 22 on the blockchain 4, the user who will be the next owner (the user terminal 3 of the user) can arbitrarily obtain them.

It is also obvious to those skilled in the art that non-interactive zero-knowledge proofs based on Fiat-Shamir heuristics may be used when the robustness of the product holding unit 11 is reliable.

<Modification>
In the above example, the manufacturer 5 of the product 2 sells the product 2 to the user through the product transaction support device 1 configured like a locker. The device 1 does not have to be fixedly installed at a predetermined place, and the product transaction support device 1 itself may be configured to move while also transporting the product 2 . Also, the product 2 may be delivered in multiple stages on the distribution route before the user who purchases the product 2 receives the product 2 .

FIG. 7 is a diagram for explaining an overview of an example of transfer of product 2 according to one embodiment of the present invention. In the example of FIG. 7, a product 2 manufactured by a manufacturer 5 is stored in a product transaction support device 1a having a box-shaped product holding unit 11 and handed over to a user having a user terminal 3a. An example is shown in which the data is stored in the support device 1b and handed over to the user who has the user terminal 3b, and further stored in the product transaction support device 1c and handed over to the user who has the user terminal 3c. . The management right (or ownership) of the product 2 and the NFT 22 related thereto is the manufacturer 5→product transaction support device 1a→user terminal 3a→product transaction support device 1b→user terminal 3b→product transaction support device 1c→ It transfers to the user terminal 3c one by one.

In addition, in the example in the drawing, the product transaction support device 1a is transported by a truck or the like, and the product transaction support device 1b is transported by a ship. A purchaser having a user terminal 3c receives the product 2 from the product transaction support device 1c fixedly installed as a locker. It should be noted that the configuration in which the product transaction support device 1 is transported by a vehicle, ship, or the like as in the example in the figure is not limited, and the product transaction support device 1 itself has a function of autonomously moving to transport the product 2. may be a configuration having

The purchaser who has the user terminal 3c can acquire the product 2 after verifying the authenticity of the product 2 stored in the product transaction support device 1c, and can refer to the transaction history of the corresponding NFT 22. , you can check what kind of distribution route it has passed through. In addition, in the case where the product transaction support device 1 is configured to move, for example, by providing the control unit 12 with a function to acquire and record GPS (Global Positioning System) position information at any time, the moving route of the product 2 can also be determined by the NFT 22 Alternatively, it can be recorded off-chain and made available for reference.

A purchaser who has a user terminal 3c may decide to purchase the product 2 when it is manufactured by the manufacturer 5 or put up by the exhibitor through an EC site or the like. After that, the purchase may be determined by actually looking at the product 2 stored in the product transaction support device 1c.

If the product 2 that the purchaser intends to obtain is a specific item (one-of-a-kind item, non-substitutable item) such as a specific second-hand item, the item 2 stored in the commodity transaction support device 1 is mainly targeted. It is considered that it is verified based on the information written in the NFT 22 that it matches the specific object of the target (it is the specific object itself of the target). In addition, if the product 2 is one of mass-produced unspecified items (substitutable product), it is mainly because the product 2 is the one selected by the purchaser that it is a legitimate product. It is considered that it will be confirmed from the transaction history etc. of NFT 22 that it was manufactured by manufacturer 5 of NFT 22.

As described above, according to the product transaction support device 1 and the product transaction support method using the device according to the embodiment of the present invention, the product 2 is held by, for example, being stored in the product holding unit 11, By associating the NFT 22 with the product 2, it is possible to realize a mechanism that allows the user to verify the authenticity of the product 2 and the process of its distribution and transaction. Then, the product 2 is stored in the product holding unit 11 and locked so that the product 2 cannot be taken out until predetermined conditions such as verification of authenticity and payment of the price are met. It is possible to prevent the authenticity of the product 2 from being damaged.

Although the invention made by the present inventor has been specifically described above based on the embodiments, the present invention is not limited to the above embodiments, and can be variously modified without departing from the scope of the invention. Needless to say. Further, the above-described embodiments are described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the described configurations. Moreover, it is possible to add, delete, or replace some of the configurations of the above-described embodiments with other configurations.

Further, each of the above configurations, functions, processing units, processing means, and the like may be realized by hardware, for example, by designing a part or all of them using an integrated circuit. Moreover, each of the above configurations, functions, etc. may be realized by software by a processor interpreting and executing a program for realizing each function. Information such as programs, tables, and files that implement each function can be stored in recording devices such as memories, hard disks, and SSDs, or recording media such as IC cards, SD cards, and DVDs.

Further, in each of the above drawings, control lines and information lines are those considered to be necessary for explanation, and not all control lines and information lines for implementation are necessarily shown. In fact, it may be considered that almost all configurations are interconnected.

INDUSTRIAL APPLICABILITY The present invention can be used for a product transaction support device that can verify the authenticity of products.

1 Product transaction support device 1a to 1c Product transaction support device 2 Product 3 User terminal 3a to 3c User terminal 4 Block chain 5 Manufacturer
11... Commodity holding unit, 12... Control unit, 13... IC reader, 14... Communication unit, 15... Wallet management unit,
21...IC chip, 22...NFT

Claims (6)

A commodity transaction support device for supporting delivery of a commodity from a first subject to a second subject,
a product holding unit having a structure capable of storing the product;
a control unit having an IC reader capable of reading the content of an IC chip attached to the product stored in the product holding unit;
The control unit
the private key out of a pair of private and public keys generated for the product in the first information processing device associated with the first entity, and a predetermined value used to generate the public key; When the product attached with the IC chip storing is stored in the product holding unit, the IC reader reads the contents of the IC chip, and the first information processing device reads the content of the IC chip on the block chain When the sending of the NFT with the public key set as an attribute to the wallet corresponding to the product transaction support device is completed, the product stored in the product holding unit is locked so that it cannot be taken out,
transmitting the challenge to the IC chip via the IC reader when receiving a challenge for verifying the authenticity of the product transmitted from the second information processing device associated with the second subject; On the other hand, when a proof calculated by a predetermined calculation based on the challenge, the secret key, and the predetermined value is received from the IC chip via the IC reader , the proof is sent to the second Send to the information processing device,
Corresponding to the second entity on the blockchain in response to an unlocking request from the second information processing device that has verified the proof value by a predetermined calculation based on the challenge and the public key A product transaction support device that sends the NFT to a wallet that stores the NFT and, when the sending is completed, unlocks the product stored in the product holding unit so that the product can be taken out. In the commodity transaction support device according to claim 1,
The merchandise transaction support device, wherein the merchandise holding unit is a box-shaped structure having a door that can be locked/unlocked. In the commodity transaction support device according to claim 1,
The product transaction support device, wherein the product holding unit includes a plurality of the IC readers and can store a plurality of the products. In the commodity transaction support device according to claim 1,
A commodity transaction support device comprising a plurality of the commodity holding units. A commodity transaction support method for supporting delivery of a commodity from a first subject to a second subject, comprising:
a first step in which a first information processing device associated with the first subject issues a pair of a private key and a public key associated with the product;
When the product transaction support device having a structure capable of storing the product stores the product attached with an IC chip storing a predetermined value used to generate the public key and the secret key, a second step of reading the contents of the IC chip;
The first information processing device issues an NFT (non-fungible token) related to the commodity on a blockchain, sets the public key as an attribute, and stores the NFT in a wallet corresponding to the commodity transaction support device. a third step of sending
a fourth step in which the product transaction support device locks the stored product so that it cannot be taken out when the reading of the content of the IC chip and the sending of the NFT in the wallet are completed;
a fifth step in which a second information processing device associated with the second subject verifies the authenticity of the product;
When the authenticity of the product is verified, the product transaction support device receives the unlocking request from the second subject and stores the wallet corresponding to the second subject on the blockchain. a sixth step of sending an NFT and unlocking the item for retrieval when the sending is complete;
In the fifth step, the second information processing device generates a challenge and transmits it to the commodity transaction support device, and the commodity transaction support device transmits the challenge to the IC attached to the commodity. a seventh step of sending to the chip;
The IC chip calculates a proof by a predetermined calculation based on the challenge, the secret key, and the predetermined value, and transmits the proof to the commodity transaction support device, and the commodity transaction support device transmits the proof to the second an eighth step of transmitting to an information processing device;
and a ninth step in which the second information processing device verifies the value of the proof by a predetermined calculation based on the challenge and the public key. In the commodity transaction support method according to claim 5 ,
the public key generated in the second step includes a first public key generated based on the private key and a second public key generated based on a random number;
In the eighth step, a commodity transaction support method further comprising generating a third public key based on a random number and updating the second public key set in the NFT with the third public key. .

Images