JP7447450B2 - Trading system, trading management method of trading system, and trading program - Google Patents

Description

The present invention relates to a trading system, a trading management method for the trading system, and a trading program, and particularly relates to a trading system that mediates the buying and selling and resale of goods, a trading management method for the trading system, and a trading program.

2. Description of the Related Art In recent years, online transaction formats, such as goods auction sites and ticket buying and selling sites, have become popular, in which the prices of goods to be traded are determined between individuals and goods are bought and sold between individuals. In this type of transaction, there is a reality in which some people buy up large quantities of goods and resell them at a higher price than the purchase price to make a profit. Additionally, for items such as tickets, identity authentication may be performed to prevent hoarding by a single individual and to prevent resale. Therefore, a technology related to person authentication in online ticket sales is disclosed in Patent Document 1.

The authentication system disclosed in Patent Document 1 is an authentication system that includes a customer terminal, an authentication device, and an information processing device, and the customer terminal includes a display reception unit that receives the input of the customer's personal information, and a display reception unit that receives the input of the customer's personal information. The information processing device includes a biometric information acquisition unit that obtains biometric information, a storage unit that stores the personal information and the biometric information, and a control unit that transmits the personal information and the biometric information to the information processing device. includes a storage unit that stores the personal information and the biometric information received from the customer terminal; and a storage unit that receives the biometric information and entertainment information along with a ticket purchase request from the customer terminal, and stores the biometric information in the storage unit. and the biometric information received with the ticket purchase request, and if biometric authentication is approved, a ticket purchase permission notification corresponding to the ticket purchase request is sent to the customer terminal, and the authentication device makes a first authentication request. or when a second authentication request is received, the biometric information stored in the storage unit is compared with the biometric information included in the first authentication request or the second authentication request, and biometric authentication is permitted; a control unit that transmits an authentication permission notification to the authentication device, the authentication device transmits the first authentication request or the second authentication request to the information processing device, and transmits the authentication permission notification to the information processing device. A control unit is provided that performs control to display permission to enter on a display unit when received from the processing device.

JP 2019-57004 Publication

However, with the technology described in Patent Document 1, personal information linked to the ticket and biometric information corresponding to the personal information must be entered for each ticket, and if this information changes due to resale etc. Since this cannot be done, resale is virtually impossible, resulting in a reduction in convenience for users.

One aspect of the buying and selling system according to the present invention includes a sales processing unit that receives transaction target product information used to specify the transaction target object and purchaser information used to identify the purchaser, and a sales processing unit that receives the transaction target product information and the transaction target product and a database update processing unit that updates the owner information, and the sales processing unit stores the purchaser information in a personal identification system. and transmits the transaction target product information to the transaction target identification system, and the purchaser is confirmed to be legitimate in the individual identification system, and the transaction target product is confirmed in the transaction target identification system. If it is determined that there is an identical item, the database is updated to update the owner information so that the purchaser is added to the owner information as the owner who is recorded in association with the transaction target product. Instructs the processing unit.

One aspect of the trading management method of the trading system according to the present invention uses a computer to receive transaction target product information used to specify the transaction target object and purchaser information used to identify the purchaser from another terminal, A trading management method for a trading system that manages the transaction history of the trading target product using an ownership database that stores owner information linking the trading target product information and the owner of the trading target product, the method comprising: The purchaser information is inquired of the individual identification system, the transaction target product information is sent to the transaction target object identification system, and the purchaser is confirmed to be legitimate in the individual identification system, and the transaction target product is confirmed by the individual identification system as being legitimate. If it is determined in the transaction object identification system that there is an identical item, the owner information is added to the owner information as the owner recorded by linking the purchaser to the transaction object product. Update.

One aspect of the buying and selling program according to the present invention is to have a computer receive transaction target product information used for specifying the transaction target object and purchaser information used to identify the purchaser from another terminal, and A buying and selling program that uses an ownership database that stores owner information linked to the owner of the traded product to manage the transaction history of the traded product, and queries the individual identification system for the purchaser information. personal authentication processing; product identification processing that sends the transaction target product information to a transaction target object identification system; If the transaction object identification system determines that there is an identical item, the owner information is updated so that the purchaser is added to the owner information as the owner who is recorded in association with the transaction object product. The computer is caused to perform a database update process.

According to the buying and selling system, the buying and selling management method of the buying and selling system, and the buying and selling program according to the present invention, it is possible to improve the convenience of reselling items while preventing overselling of items.

1 is a block diagram of a trading system according to a first embodiment; FIG. FIG. 2 is a diagram illustrating an example of an ownership database used in the buying and selling system according to the first embodiment. 2 is a flowchart illustrating the flow of listing processing of the buying and selling system according to the first embodiment. 2 is a flowchart illustrating the flow of sales processing in the trading system according to the first embodiment. FIG. 2 is a block diagram of a buying and selling system according to a second embodiment. 7 is a flowchart illustrating the flow of listing processing of the buying and selling system according to the second embodiment. 7 is a flowchart illustrating the flow of sales processing of the trading system according to the second embodiment.

For clarity of explanation, the following description and drawings are omitted and simplified as appropriate. In addition, each element described in the drawing as a functional block that performs various processes can be configured with a CPU (Central Processing Unit), memory, and other circuits in terms of hardware, and can be configured with a memory and other circuits in terms of software. This is accomplished by a program loaded into the computer. Therefore, those skilled in the art will understand that these functional blocks can be implemented in various ways using only hardware, only software, or a combination thereof, and are not limited to either. Note that in each drawing, the same elements are designated by the same reference numerals, and redundant explanations will be omitted as necessary.

Additionally, the programs described above can be stored and provided to a computer using various types of non-transitory computer-readable media. Non-transitory computer-readable media includes various types of tangible storage media. Examples of non-transitory computer-readable media include magnetic recording media (e.g., flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (e.g., magneto-optical disks), CD-ROMs (Read Only Memory), CD-Rs, CD-R/W, semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (Random Access Memory)). Also, the program may be provided to the computer on various types of temporary computer-readable media. Examples of transitory computer-readable media include electrical signals, optical signals, and electromagnetic waves. The temporary computer-readable medium can provide the program to the computer via wired communication channels, such as electrical wires and fiber optics, or wireless communication channels.

Embodiment 1
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a block diagram of a trading system 10 according to the first embodiment. Note that FIG. 1 shows a buying and selling authentication system 1 that includes an individual identification system 20 and a transaction object identification system 30 that are used by the buying and selling system 10. The buying and selling system 10, the individual identification system 20, and the transaction object identification system 30 may be provided as one device, or may be provided as separate devices in different locations so that they can communicate with each other via a network. You can leave it there. Further, the seller and purchaser who use the buying and selling system 10 according to the first embodiment access the buying and selling system 10 using separate terminals. This individual terminal is, for example, a terminal owned by an individual such as a smartphone or a personal computer.

As shown in FIG. 1, the buying and selling system 10 includes an exhibition processing section 11, a database update processing section 12, a sales processing section 13, and an ownership database 14. The listing processing unit 11 receives transaction target product information used to specify a transaction target product and seller information used to identify a seller. Then, the listing processing unit 11 performs a personal authentication process of inquiring the exhibitor information from the personal identification system 20 and receiving from the individual identification system 20 the verification result of the seller's legitimacy. Here, the seller information includes information for identifying the seller (for example, personal information) and biological information of the seller. As information for identifying the seller, a public certificate issued by a public institution is preferable. Possible official documents include a driver's license, My Number card, etc.

Here, two effects can be obtained by using a public certificate in personal identification using the personal identification system 20. The first effect is that unauthorized use of certificates whose original certification ability is questionable can be prevented. Specifically, in the case of a certificate issued by a non-official third-party organization, even if it is an IC card with tamper resistance in mind, there may be doubts about its original certification ability, but it may not be valid. It is considered that there is a possibility of misuse from the time of publication. However, if it is a public certificate, this risk is low. The second effect is that while there are doubts about the permanence of non-public third-party institutions, public institutions are more likely to ensure their permanence. Specifically, in the case of non-public third-party institutions, there is no guarantee that they are always in operation, but with public institutions, situations such as changes of user address are always reflected, so Even if the product is resold repeatedly, it can be properly traced back to the original user over a long period of time.

Furthermore, in the personal authentication process using the personal identification system 20, biometric information of the seller (or purchaser) is used. Examples of biometric information include face information, fingerprint information, and iris information of the seller. In addition, this biometric information can be registered in association with the traded product being exhibited, so that when the traded product is used (for example, when the product is a ticket, when entering the venue) It can be used as information to be compared with the user's biometric information.

Further, as the personal identification system 20, for example, a system called eKYC (electronic know your customer), which has been increasingly used in recent years, can be used.

The listing processing unit 11 also transmits transaction target product information to the transaction target object identification system 30 to determine whether the transaction target product to be put up for sale is the same as the transaction target product already traded on the trading system 10. Check whether Here, the transaction object specifying system 30 has a transaction object database 31 that stores transaction object product information including an identifier for specifying the transaction object product traded on the buying and selling system 10. Then, the transaction object identification system 30 determines whether a product having the same identifier as the transaction object product information received from the listing processing unit 11 is registered on the transaction object database 31. Then, based on the judgment result, the transaction object identification system 30 sends the judgment result to the exhibition processing section 11 as to whether or not the same object as the transaction object product information received from the exhibition processing section 11 is being traded on the buying and selling system 10. Reply.

The sales processing unit 13 receives transaction object product information used to specify the transaction object and purchaser information used to specify the purchaser. Then, the sales processing unit 13 inquires of the transaction target identification system 30 about the same product as the product corresponding to the received transaction target product information, and asks the transaction target object identification system 30 for the same product as the product corresponding to the transaction target product information received on the trading system 10. The determination result as to whether or not there is a product to be traded is received from the transaction target identification system 30. This determination process in the transaction object specifying system 30 is the same as the process when the listing processing unit 11 makes an inquiry to the transaction object specifying system 30 using the transaction object product information.

Further, the sales processing unit 13 performs a personal authentication process in which the purchaser information is transmitted to the personal identification system 20 and the confirmation result of the purchaser's legitimacy is received from the personal identification system 20. Here, the purchaser information includes information for identifying the purchaser (for example, personal information) and biometric information of the purchaser. As information for identifying the purchaser, a public certificate issued by a public institution is preferable. Possible official documents include a driver's license, My Number card, etc.

Note that the personal authentication process in the personal identification system 20 is substantially the same process as the personal authentication process performed based on a request from the listing processing section 11. Furthermore, among the purchaser information authenticated by the personal identification system 20, the biometric information can be registered in association with the transaction target product to be purchased, so that when the transaction target product is used (for example, when the product is If it is a ticket, it can be used as information to be compared with the user's biometric information (when entering the venue).

The database update processing unit 12 updates information on the owner of the product to be traded stored in the ownership database 14 based on instructions from the listing processing unit 11 and the sales processing unit 13. Specifically, the database update processing unit 12 performs the following processing.

The listing processing unit 11 and the individual identification system 20 confirm that the seller is legitimate, and the listing processing unit 11 and the transaction target identification system 30 confirm that the same item is not among the products traded on the buying and selling system 10. If it is determined that there is no such item, the database update processing unit 12 updates the ownership database 14 to add owner information linked to the product to be traded, with the seller as the first owner.

In addition, the listing processing unit 11 and the individual identification system 20 have confirmed that the seller is legitimate, and the listing processing unit 11 and the transaction target identification system 30 have confirmed that the item being traded on the buying and selling system 10 is the same. If it is determined that the item is present, the database update processing unit 12 refers to the owner information in the ownership database 14 and returns the latest owner information to the listing processing unit 11. Then, the listing processing unit 11 permits listing of the transaction target product when the latest owner and seller match.

Further, the transaction object that is confirmed by the sales processing unit 13 and the personal identification system 20 as being legitimate, and that is received from the purchaser on the trading system 10 by the sales processing unit 13 and the transaction object identification system 30. If it is determined that there is an item identical to the product, the database update processing unit 12 adds the purchaser to the owner information as the owner recorded in association with the transaction target product. In this way, in the buying and selling system 10, the traceability of the owner is ensured by adding the latest owner to the owner information each time the owner is transferred due to the purchase process by the purchaser.

Here, FIG. 2 shows a diagram illustrating an example of the ownership database 14 used in the buying and selling system 10 according to the first embodiment. As shown in FIG. 2, in the ownership database 14, changes in ownership are recorded for each product. Specifically, the owner recorded last for each item is the latest owner. Further, the first owner can be understood to be the creator of the corresponding product, the organizer of a performance business to which admission is possible with a ticket, or the like.

Next, the operation of the trading system 10 according to the first embodiment will be explained using a flowchart. In the buying and selling system 10 according to the first embodiment, there are two processes: listing processing and selling processing. Therefore, in the following explanation, the processing of the buying and selling system 10 will be explained separately into listing processing and selling processing.

FIG. 3 shows a flowchart explaining the flow of the listing process of the buying and selling system 10 according to the first embodiment. As shown in FIG. 3, in the buying and selling system 10 according to the first embodiment, the listing processing unit 11 receives transaction target product information and seller information from a seller (step S1). Then, the listing processing unit 11 requests the individual identification system 20 to identify the seller (step S2). Based on the individual identification request in step S2, the individual identification system 20 performs individual authentication processing, and returns the result of the individual authentication processing to the listing processing unit 11. Then, when the authenticity of the seller cannot be confirmed in the personal identification authentication (NO in step S3), the listing processing unit 11 notifies the seller of an error and ends the process. On the other hand, if the listing processing unit 11 is able to confirm the authenticity of the seller in the personal identification authentication (YES branch of step S3), the listing processing unit 11 registers the transaction target product in the transaction target object identification system 30 on the transaction target object database 31. An inquiry is made as to whether or not there is one (step S4).

Then, when the transaction object identification system 30 determines that there is an item identical to the transaction target product in the transaction object database 31 (NO branch of step S5), the listing processing unit 11 performs a transaction on the ownership database 14. It is determined whether the current owner of the target product and the seller match (step S7). Then, if the current owner and the seller do not match in step S7, the listing processing unit 11 notifies the seller of an error and ends the process (NO branch of step S7). Furthermore, if the current owner and the seller match in step S7, the listing processing unit 11 allows the listing of the transaction target product put up by the seller (step S8).

On the other hand, if the transaction object identification system 30 determines that there is no item identical to the transaction target product in the transaction object database 31 (YES branch of step S5), the listing processing section 11 determines that the database update processing section 12 owns the transaction target product. The seller is registered in the rights database 14 as the first seller in association with the product to be traded (step S6). Thereafter, the listing processing unit 11 allows the seller to put up the transaction target product for sale (step S8).

Next, FIG. 4 shows a flowchart illustrating the flow of sales processing in the trading system 10 according to the first embodiment. As shown in FIG. 4, in the buying and selling system 10 according to the first embodiment, the sales processing unit 13 receives transaction target product information and purchaser information from a purchaser (step S11). Then, the sales processing unit 13 requests the individual identification system 20 to identify the seller (step S12). Based on the individual identification request in step S12, the individual identification system 20 performs individual authentication processing and returns the result of the individual authentication processing to the sales processing section 13. If the sales processing unit 13 cannot confirm the authenticity of the purchaser in the personal identification authentication (NO in step S13), the sales processing unit 13 notifies the purchaser of an error and terminates the process. On the other hand, if the purchaser's legitimacy is confirmed in the personal identification authentication (YES branch of step S13), the sales processing unit 13 causes the transaction object identification system 30 to register the transaction object product on the transaction object database 31. An inquiry is made as to whether or not there is one (step S14).

If the transaction object identification system 30 determines that the transaction object database 31 does not have the same item as the transaction object (NO branch of step S15), the sales processing unit 13 notifies the seller of the error. The process ends. On the other hand, if the transaction object identification system 30 determines that the transaction object database 31 has the same item as the transaction object (YES branch of step S15), the database update processing unit 12 registers the purchaser in the ownership database 14. is added as the latest owner in association with the transaction target product (step S16).

As described above, in the buying and selling system 10 according to the first embodiment, the ownership database 14 maintains the history of the first sale and subsequent resale of the transaction target product. As a result, in the buying and selling system 10 according to the first embodiment, it is possible to identify when the illegal resale occurred and who performed the illegal resale, and therefore, it is possible to effectively prevent illegal resale. . Further, in the purchase and sale authentication system 1 according to the first embodiment, ownership can be transferred smoothly through resale, and therefore convenience for users regarding resale activities can be improved.

Further, in the buying and selling system 10 according to the first embodiment, by performing personal authentication using the personal identification system 20, unauthorized users can be excluded. Further, in the buying and selling system 10 according to the first embodiment, by using the personal identification system 20, it is possible to easily perform personal authentication at the time of use when the product is a ticket or the like. Furthermore, by using the personal identification system 20, it is possible to reduce the effort required for the user to rewrite the owner as a separate process every time a resale occurs.

Further, in the buying and selling system 10 according to the first embodiment, by authenticating the transaction target product using the transaction target object identification system 30, it is possible to prevent fraudulent products from being put up for sale.

Embodiment 2
In the second embodiment, a trading system 40 that is another modification of the trading system 10 according to the first embodiment will be described. In the description of the second embodiment, the same components as in the first embodiment are given the same reference numerals as in the first embodiment, and the description thereof will be omitted.

Therefore, FIG. 5 shows a block diagram of the buying and selling authentication system 2 including the buying and selling system 40 according to the second embodiment. In addition, in FIG. 5, among the exhibitors, the exhibitor who should be registered as the first exhibitor in FIG. 2 is shown as the creator. As shown in FIG. 5, the trading system 40 includes a sales processing section 41 instead of the sales processing section 13. Further, the trading system 40 has a creator payment unit 42 and a creator database 43 added to the trading system 10.

The sales processing unit 41 informs the sales processing unit 13 that when the purchaser purchases the transaction target product, the sales price increases from the purchase price when the previous owner (for example, the seller) purchased the transaction target product. A function has been added to notify the creator payment unit 42 of the price increase when the price has increased.

If the current purchase price of the transaction target product by the purchaser is higher than the previous purchase price when the previous owner purchased the transaction target product, the creator payment unit 42 calculates the current purchase price and the previous purchase price. Performs payment processing to pay at least a portion of the difference between the amount and the amount to the creator. The creator database 43 stores creator information in which the seller who first sold the transaction target product is linked to the transaction target product as the creator of the transaction target product. This creator information also includes information regarding payment to the creator (eg, account information, etc.).

Next, the operation of the trading system 40 according to the second embodiment will be explained. Therefore, FIG. 6 shows a flowchart illustrating the flow of the listing process of the buying and selling system 40 according to the second embodiment. As shown in FIG. 6, in the listing process of the buying and selling system 40 according to the second embodiment, the process of step S21 is additionally performed in place of step S6 of FIG. In step S21, the listing processing unit 11 instructs the database updating processing unit 12 to register the seller as the creator in the creator database 43 in association with the transaction target product, and the database updating processing unit 12 instructs the database updating processing unit 12 to register the seller as the creator in association with the transaction target product. It performs registration processing. As a result, the creator database 43 is constructed in the buying and selling system 40.

Further, FIG. 7 shows a flowchart illustrating the flow of sales processing of the trading system 40 according to the second embodiment. As shown in FIG. 7, the buying and selling system 40 according to the second embodiment has steps S31 and S32 added to the buying and selling process of the buying and selling system 10 according to the first embodiment shown in FIG. . Step S31 is a process performed after the process of step S16. In step S31, the sales processing unit 41 determines whether there is an increase in the sales price. Then, in step S32, based on the information obtained from the sales processing section 41, the creator payment section 42 performs a payment process to transfer a part of the increased price to the creator.

From the above explanation, in the buying and selling system 40 according to the second embodiment, by using the sales processing unit 41, the creator payment unit 42, and the creator database 43, the transaction price of the product to be traded increases due to resale. In some cases, a portion of the increased price due to resale can be transferred to the creator of the traded product.

Note that the present invention is not limited to the above embodiments, and can be modified as appropriate without departing from the spirit.

1 Buying and selling authentication system 2 Buying and selling authentication system 10 Buying and selling system 11 Listing processing unit 12 Database update processing unit 13 Sales processing unit 14 Ownership database 20 Individual identification system 30 Transaction object identification system 31 Transaction object database 40 Buying and selling system 41 Sales processing section 42 Creator Settlement Department 43 Creator Database

Claims (8)

a sales processing unit that receives transaction object product information used to identify the transaction object and purchaser information used to identify the purchaser;
an ownership database that stores owner information linking the transaction target product information and the owner of the transaction target product;
a database update processing unit that updates the owner information;
an exhibition processing unit that receives transaction target product information used to identify the transaction target product and seller information used to identify the seller;
a creator database that stores creator information linked to the transaction target product, with the seller who first sold the transaction target product as the creator of the transaction target product;
The sales processing department is
Inquiry of the purchaser information to the personal identification system,
Sending the transaction target product information to a transaction target object identification system,
If the individual identification system confirms that the purchaser is legitimate, and the transaction object identification system determines that there is an identical product, the purchaser is identified as the transaction object product. instructing the database update processing unit to update the owner information so as to add it to the owner information as the owner recorded in association with ;
The listing processing department is
Inquiry of the seller information to the personal identification system,
transmitting the transaction target product information to the transaction target object identification system;
If the individual identification system confirms that the seller is legitimate, and the transaction object identification system determines that there is no identical product, the seller will be considered the owner. A buying and selling system that instructs the database update processing unit to update the owner information in association with the transaction target product and also permits listing of the transaction target product . The buying and selling system according to claim 1, wherein the purchaser information includes at least a public certificate issued by a public institution and biometric information of the purchaser. The buying and selling system according to claim 1 , wherein the seller information includes at least a public certificate issued by a public institution and biometric information of the seller. If the individual identification system confirms that the seller is legitimate, and the transaction target product is determined to be the same as the transaction object identification system, the listing processing unit The buying and selling system according to any one of claims 1 to 3, wherein listing of the transaction target product is permitted based on the fact that the latest owner recorded in the owner information matches the seller. If the current purchase price of the transaction target product by the purchaser is higher than the previous purchase price when the previous owner purchased the transaction target product, the difference between the current purchase price and the previous purchase price. 5. The buying and selling system according to claim 1 , further comprising a creator payment unit that performs payment processing for paying at least a portion of the purchase amount to the creator. The buying and selling system according to any one of claims 1 to 5 , wherein at least one of the individual identification system and the transaction object identification system is a system different from the own system, and is provided so as to be able to cooperate with the own system. Transaction target product information used to identify the transaction target from another terminal, purchaser information used to identify the purchaser , transaction target product information used to identify the transaction target product, and seller information used to identify the seller and an ownership database that stores owner information linking the transaction target product information and the owner of the transaction target product, and the creator of the transaction target product, which stores the seller who first sold the transaction target product. A trading management method for a trading system that manages the transaction history of the trading target product using a creator database that stores creator information linked to the trading target product as a user ,
Inquiry of the purchaser information to the personal identification system,
Sending the transaction target product information to a transaction target object identification system,
If the individual identification system confirms that the purchaser is legitimate, and the transaction object identification system determines that there is an identical product, the purchaser is identified as the transaction object product. updating the owner information so as to add it to the owner information as the owner recorded in association with the owner;
Inquiry of the seller information to the personal identification system,
transmitting the transaction target product information to the transaction target object identification system;
If the individual identification system confirms that the seller is legitimate, and the transaction object identification system determines that there is no identical product, the seller will be considered the owner. The owner information is updated by linking it to the transaction target product, and the listing of the transaction target product is permitted.
A trading management method for a trading system in which each process is performed by a computer . Information on the product to be traded used to identify the product to be traded, buyer information used to identify the purchaser, product information to be traded used to identify the product to be traded, and product information to be used to identify the seller is sent to the computer from another terminal. An ownership database that receives seller information and stores owner information linking the transaction target product information with the owner of the transaction target product, and the seller who first sold the transaction target product as the transaction target. A buying and selling program that manages the transaction history of the trading target product using a creator database that stores creator information linked to the trading target product as the creator of the product ,
personal authentication processing that queries the purchaser information to a personal identification system;
a product identification process of transmitting the transaction target product information to a transaction target object identification system;
If the individual identification system confirms that the purchaser is legitimate, and the transaction object identification system determines that the transaction target product is the same, the purchaser is identified as the transaction target product. a database update process of updating the owner information so as to add the owner information to the owner information as the owner recorded in association with the owner ;
personal identification request processing that queries the individual identification system for the exhibitor information;
a product matching process of transmitting the transaction target product information to the transaction target object identification system;
If the individual identification system confirms that the seller is legitimate, and the transaction object identification system determines that there is no identical product, the seller will be considered the owner. a listing permission process that instructs the database update process to update the owner information in association with the transaction target product, and permits listing of the transaction target product;
A buying and selling program that causes the computer to perform the following.

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