JP7336011B1 - Information processing device, information processing system, information processing program - Google Patents

Abstract

An information processing apparatus capable of disseminating electronic content more appropriately is provided.
A management server device (60) includes a storage unit (61) that stores original data and secondary creation data of an e-book, and a token management unit (634) that issues an NFT corresponding to the secondary creation data on a distributed ledger. , and a communication unit 62 that communicates with the terminal device. The NFT corresponding to the secondary creation data includes URL information with which the original data can be accessed and URL information with which the secondary creation data can be accessed. The communication unit 62 transmits the original data to the terminal device when the terminal device requests access to the former URL information, and transmits the secondary data when the terminal device requests access to the latter URL information. Send creative data to the terminal device.
[Selection drawing] Fig. 3

Description

The present invention relates to an information processing device, an information processing system, and an information processing program.

Conventionally, there is a system described in Patent Document 1 below. This system is a system for providing electronic books to users.

JP 2022-20557 A

With respect to electronic content such as e-books, it is desirable to expand the spread of so-called secondary creations, such as translations and other secondary creations, when considering overseas expansion, for example. On the other hand, in recent years, it has become a problem that secondary creations of electronic contents are modified without the permission of the original authors and distributed in the market in the form of, for example, pirated copies. Therefore, there is still room for improvement in terms of the popularization of electronic contents.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object of the present invention is to provide an information processing apparatus, an information processing system, and an information processing program capable of disseminating electronic content more appropriately.

An information processing device that solves the above problems includes a storage unit that stores original data of electronic content and secondary creation data that is secondary creation from the original data, and a non-substitutable token corresponding to the secondary creation data. It comprises a token management unit that issues tokens on a distributed ledger, and a communication unit that communicates with a terminal device. The token corresponding to the secondary creation data includes first access information that allows access to the original data stored in the storage unit and first access information that allows access to the secondary creation data stored in the storage unit. 2 access information. When the terminal device requests access to the first access information, the communication unit transmits the original data stored in the storage unit to the terminal device, and when the terminal device requests access to the second access information. If so, the secondary creation data stored in the storage unit is transmitted to the terminal device.

An information processing system that solves the above problems includes a storage unit that stores original data of electronic content and secondary creation data that is secondary creation from the original data, and a non-substitutable token corresponding to the secondary creation data. It comprises a token management unit that issues tokens on a distributed ledger, and a communication unit that communicates with a terminal device. The token corresponding to the secondary creation data includes first access information that allows access to the original data stored in the storage unit and first access information that allows access to the secondary creation data stored in the storage unit. 2 access information. When the terminal device requests access to the first access information, the communication unit transmits the original data stored in the storage unit to the terminal device, and when the terminal device requests access to the second access information. If so, the secondary creation data stored in the storage unit is transmitted to the terminal device.

An information processing program that solves the above problems is a computer that communicates with a token management unit that issues an irreplaceable token corresponding to secondary creation data created from original data on a distributed ledger, and a terminal device. function as a communication unit that performs The token corresponding to the secondary creation data includes first access information that allows access to the original data stored in the storage unit and first access information that allows access to the secondary creation data stored in the storage unit. 2 access information. When the terminal device requests access to the first access information, the communication unit transmits the original data stored in the storage unit to the terminal device, and when the terminal device requests access to the second access information. If so, the secondary creation data stored in the storage unit is transmitted to the terminal device.

With these configurations, it is possible to manage the original data and the secondary creation data of the electronic content in the storage section, thereby preventing unintended modification thereof. Also, if a token corresponding to secondary creation data is issued on a distributed ledger, and the token includes the first access information and the second access information, the first access information and the second access information By using , the terminal device can easily acquire electronic content corresponding to each of the original data and the secondary creation data. As a result, it is possible to spread electronic content more easily. Furthermore, since tokens corresponding to secondary creation data are managed as non-substitutable tokens on the blockchain, pirated electronic content that has been unintentionally altered, legitimate original data and secondary creation data It becomes easy to discriminate from corresponding electronic contents. As a result, pirated electronic content can be easily removed from the market, and electronic content can be more appropriately disseminated.

According to the information processing apparatus, information processing system, and information processing program of the present invention, it is possible to spread electronic content more appropriately.

1 is a block diagram showing a schematic configuration of an information processing system according to an embodiment; FIG. FIG. 2 is a block diagram showing hardware configurations of a terminal device and a management server device according to the embodiment; 3 is a block diagram showing the functional configuration of the management server device of the embodiment; FIG. FIG. 2 is a diagram schematically showing a distribution mode of electronic books in the information processing system of the embodiment; (A) and (B) are diagrams showing an example of information included in the NFT of the original book data of the embodiment. 4A and 4B are diagrams showing an example of information included in each NFT of derivative work book data and original book data of the embodiment; FIG. 4A and 4B are diagrams schematically showing how money is transferred when the original data of the electronic book of the embodiment is purchased; FIG. FIG. 4 is a diagram schematically showing how money is transferred when secondary creation data of an electronic book according to an embodiment is purchased; 3 is a block diagram showing the functional configuration of the terminal device of the embodiment; FIG. 4 is a sequence chart showing an operation example of the information processing system according to the embodiment; 4 is a sequence chart showing an operation example of the information processing system according to the embodiment; (A) and (B) schematically illustrate how money is transferred when original data of an e-book in another embodiment is purchased, and how money is transferred when secondary creation data of an e-book is purchased. , respectively.

Hereinafter, one embodiment of an information processing device, an information processing system, and an information processing program will be described with reference to the drawings. In order to facilitate understanding of the description, the same constituent elements in each drawing are denoted by the same reference numerals as much as possible, and overlapping descriptions are omitted.
<Overview of information processing system>
The information processing system 10 shown in FIG. 1 is a system for managing and selling electronic contents created by original creators and secondary creators. Electronic content includes electronic books, music data, still image data, moving image data, and the like. A case where the electronic content is an electronic book will be described below. Electronic books include comics, novels, and the like that have been converted to electronic data. As shown in FIG. 1 , the information processing system 10 includes terminal devices 20 , 30 and 40 , a distributed ledger system 50 and a management server device 60 . The terminal devices 20 and 30, the distributed ledger system 50, and the management server device 60 are connected via a network line N so as to be able to communicate with each other.

Terminal devices 20, 30, and 40 are, for example, personal computers, smart phones, and tablet terminals.
The terminal device 20 is owned by the issuer of the original data of the electronic book. The issuer of the original data of the electronic book is, for example, the original author or publisher of the electronic book. Below, the original data of an electronic book is called "original book data." In this embodiment, the original book data corresponds to the original data of the electronic content. The issuer can register the original book data in the management server device 60 by using the electronic book application installed in the terminal device 20 . The e-book application is a dedicated application for using the e-book service provided by the management server device 60 .

The terminal device 30 is owned by the purchaser of the original book data. Hereinafter, the purchaser of the original book data will be referred to as the "primary purchaser". A primary purchaser can purchase original book data sold by a publisher by using an electronic book application installed in the terminal device 30 . This enables the primary purchaser to view the original book data and lend it to others in the electronic book application.

Also, the primary purchaser can create a secondary creation of an electronic book from the original manuscript data. An e-book created by secondary creation is, for example, an e-book translated into a language different from the language in which the original book data is written in a predetermined language. Below, the secondary creation data of the electronic book created by the secondary creation is referred to as "derivative book data". The primary purchaser can register the created secondary creation book data in the management server device 60 by using the electronic book application installed in the terminal device 30 . When the secondary creation book data is approved by the issuer of the original book data, the primary purchaser can rent the secondary creation book data in the electronic book application.

The terminal device 40 is owned by a purchaser of at least one of the original book data and secondary creation data lent by the primary purchaser. Hereinafter, a purchaser of at least one of the original book data and secondary creation data rented by the primary purchaser is referred to as a "secondary purchaser." The secondary purchaser can borrow at least one of the original book data and secondary creation book data lent by the primary purchaser by using the electronic book application installed in the terminal device 30.例文帳に追加Thereby, the secondary purchaser can view at least one of the original book data and the secondary creation book data.

The distributed ledger system 50 has multiple nodes 51 . Each node 51 has a distributed ledger 510 . Based on a request from the management server device 60, the distributed ledger system 50 issues a non-substitutable token corresponding to each of the original book data and the secondary creation book data, so-called NFT (Non Fungible Token), The issued NFT is stored in the distributed ledger 510 of each node 51 using a known distributed ledger technology.

The management server device 60 is a device that provides an electronic book service via an electronic book application. For example, the management server device 60 manages original book data registered by the issuer and secondary creation book data registered by the primary purchaser. In addition, the management server device 60 provides an electronic book service that enables purchase and rental of original book data and secondary creation book data via an electronic book application. In this embodiment, the management server device 60 corresponds to an information processing device.

In addition, hereinafter, the primary purchaser and the secondary purchaser are collectively referred to as the "purchaser". Also, the issuer, the primary purchaser, and the secondary purchaser are collectively referred to as "users".
<Hardware configuration of terminal device and management server device>
As shown in FIG. 2, the terminal devices 20, 30, and 40 and the management server device 60 include a processor 11, a storage device 12, a communication device 13, an input device 14, an output device 15, etc. as hardware configurations. have. The processor 11 is a CPU (Central Processing Unit), a GPU (Graphical Processing Unit), or the like. The storage device 12 is composed of, for example, at least one of memory, HDD (Hard Disk Drive), and SSD (Solid State Drive). The communication device 13 performs wired communication or wireless communication. The input device 14 is a device that receives a user's input operation, and includes at least one of a keyboard, a touch panel, a mouse, and a microphone, for example. The output device 15 is a device that outputs information, and includes at least one of a display, a touch panel, and a speaker, for example.

<Configuration of management server device>
As shown in FIG. 3, the management server device 60 includes a storage unit 61, a communication unit 62, and a control unit 63 as its functional configuration.
The storage unit 61 has a function of storing various data such as a user database 610 and a document database 611 in addition to various programs. The storage unit 61 can be realized by the storage device 12 shown in FIG. 2, for example.

The user database 610 stores account information, e-book purchase history, wallet information, authority information, user setting information, and the like for each user who uses the e-book application. The account information includes the user's identification number, password, etc. used when using the electronic book service. The wallet information includes bank account information, credit card information, etc. registered by the user. The authority information is information indicating whether or not authority regarding operations on the electronic book application is granted. The rights granted on the electronic book application include, for example, viewing rights and lending rights to original book data, and creation rights, viewing rights, and lending rights to secondary creation book data. The user setting information includes price information and the like set by the user. For example, the user setting information of the issuer includes information such as the selling price of the original book data set by the issuer and the royalty price at the time of secondary distribution. In addition, the primary purchaser's user setting information includes information such as the rental price of original book data and the rental price of secondary creation data set by the primary purchaser.

Original book data and secondary creation book data created from the original book data are stored in the manuscript database 611 in association with each other. Also, the original book data and secondary creation book data are individually assigned URL information that enables access to those data on the Internet. In the manuscript database 611, the original book data is stored in association with the identification number of the publisher who created the original book data, URL information, and the like. Further, in the manuscript database 611, the identification number of the creator who created the derivative work book data, the URL information, and the like are stored in association with the derivative work book data. In this embodiment, the URL information corresponding to the original book data corresponds to the first access information, and the URL information corresponding to the secondary creation book data corresponds to the second access information.

The communication unit 62 has a function of performing various communications with the terminal devices 20 , 30 , 40 and the distributed ledger system 50 via the network line N. The communication unit 62 can be realized, for example, by the processor 11 shown in FIG. 2 executing a program stored in the storage unit 61 to control the communication device 13 .

The control unit 63 has a function of controlling the management server device 60 in an integrated manner. The control unit 63 can be realized, for example, by executing a program stored in the storage unit 61 by the processor 11 shown in FIG. The control unit 63 has, as its functional configuration, a data registration unit 630, an authority setting unit 631, a browsing data transmission unit 632, a secondary creation approval request unit 633, a token management unit 634, a transaction processing unit 635, and

(Data registration section)
The data registration unit 630 registers the original book data in the manuscript database 611 when the registration of the original book data is requested from the terminal device 20 on the electronic book application. Specifically, the management server device 60 receives the issuer's identification number from the terminal device 20 together with the original book data. When the data registration unit 630 receives the original book data and the issuer's identification number via the communication unit 62, the data registration unit 630 creates dedicated URL information that allows access to the original book data, and stores the created URL information and the original book data. , and the identification number of the issuer are associated with each other and registered in the manuscript database 611 .

Further, when the terminal device 30 requests registration of derivative work book data on the electronic book application, the data registration unit 630 registers the derivative work book data in the manuscript database 611 . Specifically, the identification number of the primary purchaser is transmitted from the terminal device 20 to the management server device 60 together with the derivative work book data. When the data registration unit 630 receives the secondary creation book data and the identification number of the primary purchaser via the communication unit 62, it creates dedicated URL information that allows access to the secondary creation book data, and the created URL The information, the secondary creation book data, and the primary purchaser's identification number are associated and registered in the manuscript database 611 .

(Authority setting part)
The authority setting unit 631 sets authority on the electronic book application for the purchaser of the electronic book.
For example, when the original book data is purchased by the primary purchaser, the authority setting unit 631 provides the primary purchaser with viewing authority and lending authority of the original book data, creation authority and viewing authority of the secondary creation book data, etc. to give By granting the authority, the user can execute the corresponding operation on the electronic book application.

In addition, when the issuer's approval is obtained for the secondary creation book data created by the primary purchaser, the authority setting unit 631 further grants the primary purchaser the right to lend the secondary creation book data. Give. This enables the primary purchaser to lend the secondary creation book data to others. If the secondary creation book data created by the primary purchaser is not approved by the issuer, the primary purchaser cannot lend the secondary creation book data to others.

On the other hand, when a secondary purchaser purchases the original book data lent by the primary purchaser, the authority setting unit 631 grants the secondary purchaser the authority to read the original book data. In addition, when the secondary purchaser purchases the secondary creation book data lent by the primary purchaser, the authority setting unit 631 grants the secondary purchaser the right to view the secondary creation book data. . Therefore, the secondary purchaser can only view at least one of the original book data and the secondary creation book data.

The authority information set by the authority setting unit 631 is stored in the user database 610 for each user together with account information and the like. The authority information stored in the user database 610 is transmitted from the management server device 60 to each of the terminal devices 30 and 40 and used when the electronic book application is activated in each of the terminal devices 30 and 40 . For example, when an electronic book application is activated on the terminal device 20 of the primary purchaser, authority information corresponding to the primary purchaser is transmitted to the terminal device 20 . As a result, in the terminal device 20, operations corresponding to the authority information, specifically, operations such as browsing original book data, lending original book data, and creating secondary creation book data are possible on the electronic book application. becomes.

In addition, in this embodiment, various operations related to original book data and secondary creation book data, such as viewing, lending, and selling original book data, and creating, viewing, and lending secondary creation book data, are performed by dedicated It is possible only on the e-book application.

(Browsing data transmission unit)
When the primary purchaser's terminal device 30 accesses the URL information of the original book data on the electronic book application, the browsing data transmission unit 632 transmits the original book data corresponding to the URL information to the terminal device 30. 62. This enables the primary purchaser to browse the original book data on the terminal device 30 . The browsing data transmission unit 632 also operates in the same way when the secondary purchaser's terminal device 40 accesses the URL information of the original book data on the electronic book application.

Furthermore, when the secondary purchaser's terminal device 40 accesses the URL information of the secondary creation of the e-book on the e-book application, the browsing data transmission unit 632 transmits the secondary creation book corresponding to the URL information. Data is transmitted to the terminal device 40 via the communication unit 62 . Thereby, the secondary purchaser can view the original book data on the terminal device 30 .

(Derivative Creation Approval Request Department)
The secondary creation approval requesting section 633 requests the issuer to approve the secondary creation book data when the primary purchaser creates the secondary creation book data. For example, when secondary creation book data is registered in the data registration unit 630, the secondary creation approval requesting unit 633 requests the issuer's terminal device 20 to approve the secondary creation book data. As a result, the terminal device 20 allows the publisher to select whether or not to approve the secondary creation book data. The issuer can judge whether or not to approve the secondary creation book data for which approval is requested while viewing the secondary creation book data on the terminal device 20 .

When the issuer performs an operation to approve the derivative work book data on the terminal device 20, the derivative work approval request unit 633 requests the derivative work book data registered in the data registration unit 630 to be processed on the electronic book application. Publish. This enables the secondary purchaser to purchase secondary creation book data via the electronic book application.

On the other hand, if the publisher does not perform an operation to approve the derivative work book data, that is, if the issuer refuses to approve the derivative work book data, the derivative work approval requesting unit 633 sends the data registration unit 630 Do not publish the registered secondary creation book data on the electronic book application. In this case, it is impossible to purchase the secondary creation book data via the electronic book application, and the secondary creation book data will not be distributed on the market.

(Token management department)
The token management unit 634 requests the distributed ledger system 50 to issue an NFT corresponding to each purchase of original book data and secondary creation book data.

For example, as shown in FIG. 4, when the user A10 who is the issuer creates original book data and the user A11 who is the primary purchaser purchases the original book data, the token management unit 634 stores the original book data The distributed ledger system 50 is requested to issue the NFT 110 corresponding to . As shown in FIG. 5A, this NFT 110 includes a token ID, an NFT issuer, an NFT owner, metadata corresponding to the original book data, transaction data, and the like. Token ID is an identification number unique to NFT. The issuer of the NFT is the management company of the management server device 60 or the like. The owner of the NFT is user A11. The metadata includes the title of the work, the creator of the original book data, the sales price of the original book data, the royalty price at the time of secondary distribution, URL information of the original book data, and the like. The selling price and the royalties price at the time of secondary distribution are set through the terminal device 20 by the original author or publisher of the electronic book. The transaction data is information related to the transaction history of the original book data. The transaction data stores information related to transactions such as the transfer or sale of the original book data that have been performed up to now, for example, the transfer source and the transfer destination at the time of the transaction, in association with each other.

As shown in FIG. 4, when a user A12 different from the user A11 purchases original book data, the token management unit 634 requests the distributed ledger system 50 to issue an NFT 111 different from the original book data. . As shown in FIG. 5B, this NFT 111 has the same information as the NFT 110, except that a token ID different from that of the NFT 110 is set and the owner of the NFT is set to the user A12. ing.

On the other hand, as shown in FIG. 4, after user A11 creates secondary creation book data from original book data, when user B11 who is a secondary purchaser purchases the secondary creation book data, the token management unit 634 requests the distributed ledger system 50 to issue the NFT 120 corresponding to the secondary creation book data. As shown in FIG. 6A, this NFT 120, like the NFT 110 of the original book data, includes the token ID, the issuer of the NFT, the owner of the NFT, metadata corresponding to the secondary creation book data, and transaction data, etc. In this case, the owner of the NFT is user B11. The metadata includes the title of the work, the creator of the original book data, the creator of the secondary creation book data, the rental price of the original book data, the rental price of the secondary creation book data, the royalty price at the time of secondary distribution, and the original book. URL information of data, URL information of derivative work book data, etc. are included. The rental price of the original book data and the rental price of the secondary creation book data are set by the user B11 through the terminal device 30. FIG.

Also, as shown in FIG. 4, when a user B12 different from the user B11 purchases the original book data from the user A12, the token management unit 634 issues the NFT 121 corresponding to the original book data to the distributed ledger. Request to system 50 . As shown in FIG. 6(B), this NFT 121 basically has the same information as the NFTs 110 and 111 shown in FIGS. 5(A) and 5(B).

(Transaction processing department)
The transaction processing unit 635 shown in FIG. 3 executes deposit/withdrawal processing related to the transaction when the original book data or secondary creation book data is purchased on the electronic book application.

Specifically, when the primary purchaser purchases the original book data by operating the terminal device 30, the transaction processing unit 635 generates a Executes payment processing of money to a person. For example, as shown in FIG. 4, when user A11, who is the primary purchaser, purchases original book data, the transaction processing unit 635 stores the sales price information of the original book data set by the issuer in the user database 610. and withdraw the amount corresponding to the acquired selling price from the wallet of the user A11. For example, if the selling price of the original book data is set at 500 yen, the transaction processing unit 635 withdraws 500 yen from the wallet of user A11. Then, as shown in FIG. 7A, the transaction processing unit 635 deposits the amount “500 yen×P” obtained by multiplying the selling price by the payment rate P into the wallet of the management company that provides the e-book service. do. The payment rate P is a percentage, and is set to 50%, for example. The payment rate is preset by the management company. In addition, the transaction processing unit 635 deposits the amount “500 yen×(100−P)” obtained by multiplying the selling price by “100−P” to the wallet of the issuer.

When a secondary purchaser purchases the original book data lent by the primary purchaser, the transaction processing unit 635 performs the secondary purchase based on the respective wallet information of the issuer, the primary purchaser, and the secondary purchaser. Execute the payment processing of money from the purchaser to the primary purchaser and the issuer. For example, as shown in FIG. 4, when secondary purchaser user B12 purchases original book data lent by primary purchaser user A12, the transaction processing unit 635 Information on the rental price of the set original book data is obtained from the user database 610, and an amount corresponding to the obtained rental price information is withdrawn from the wallet of the user B12. For example, if the rental price of the original book data is set at 300 yen, the transaction processing unit 635 withdraws 300 yen from the wallet of user B12. Then, as shown in FIG. 7B, the transaction processing unit 635 sends the difference of 50 yen (=300 yen-250 yen) calculated by subtracting the royalty price at the time of secondary distribution from the rental price to the user. Deposit into A12's wallet. In addition, the transaction processing unit 635 deposits 250 yen, which is the royalty price at the time of secondary distribution, into the wallet of the issuer.

On the other hand, when the secondary purchaser purchases the secondary creation book data lent by the primary purchaser, the transaction processing unit 635 executes , executes the payment processing of money from the secondary purchaser to the primary purchaser and the issuer. For example, as shown in FIG. 4, when secondary purchaser user B11 purchases secondary creation book data lent by primary purchaser user A11, the transaction processing unit 635 Information on the rental price of the secondary creation book data set by the user is obtained from the user database 610, and an amount corresponding to the obtained rental price information is withdrawn from the wallet of the user B11. For example, if the rental price of the original book data is set at 800 yen, the transaction processing unit 635 withdraws 800 yen from the wallet of user B11. Then, as shown in FIG. 8, the transaction processing unit 635 transfers the difference of 550 yen (=800 yen-250 yen) calculated by subtracting the royalty price at the time of secondary distribution from the rental price to the wallet of the user A11. deposit into. In addition, the transaction processing unit 635 deposits 250 yen, which is the royalty price at the time of secondary distribution, into the wallet of the issuer.

<Configuration of distributed ledger system>
The distributed ledger system 50 shown in FIG. 1 is a system that manages NFTs of original book data and secondary creation book data based on so-called block chain technology. The distributed ledger system 50 registers NFTs in the distributed ledger 510 based on requests from the management server device 60, specifically based on NFT issuance requests for the original book data and secondary creation book data. . In addition, the distributed ledger system 50 registers the transaction data in the distributed ledger 510 when a transaction such as a transfer is made for each of the original book data and secondary creation book data. Specifically, distributed ledger 510 stores multiple blocks containing hash values and lists of transactions. A transaction is information relating to a transaction of book data associated with an NFT. A hash value is calculated from a portion of the previous transaction based on a hash function. In the distributed ledger 510, transaction histories are stored in a state where each block is linked like a chain by a hash value.

<Configuration of issuer's terminal device>
As shown in FIG. 9, the issuer's terminal device 20 includes a display unit 21, a storage unit 22, a communication unit 23, an input unit 24, and a control unit 25 as its functional configuration. there is

The display unit 21 has a function of displaying various screens. The display unit 21 displays, for example, an operation screen of an electronic book application. The display unit 21 can be realized by the output device 15 shown in FIG. 2, for example.
The storage unit 22 has a function of storing various information of the terminal device 20 . Various programs and the like are stored in the storage unit 22, and an electronic book application is installed. Further, the storage unit 22 stores issuer account information used when using the electronic book application. Further, the storage unit 22 stores original book data. The storage unit 22 can be realized by the storage device 12 shown in FIG. 2, for example.

The communication unit 23 has a function of performing various communications with the management server device 60 via the network line N. FIG. The communication unit 23 can be realized, for example, by the processor 11 shown in FIG. 2 executing a program stored in the storage unit 22 to control the communication device 13 .
The input unit 24 has a function of receiving a user's operation. The input unit 24 can be realized by the input device 14 shown in FIG. 2, for example.

The control unit 25 has a function of centrally controlling the terminal device 20 . The control unit 25 can be realized, for example, by executing a program stored in the storage unit 22 by the processor 11 shown in FIG. The control unit 25 includes an application execution unit 250 and a display control unit 251 as its functional configuration.

(application execution part)
Application execution unit 250 executes an electronic book application stored in storage unit 22 based on a user's operation on input unit 24 . When executing the electronic book application, the application execution unit 250 exchanges various information with the management server device 60 via the communication unit 23, thereby enabling various operations related to the electronic book service on the application.

For example, when the electronic book application is activated based on the publisher's operation on the input unit 24 , the application execution unit 250 transmits the account information stored in the storage unit 22 to the management server device 60 . As a result, authentication based on the account information is performed by the management server device 60 . If the authentication is established, the issuer can use the electronic book service provided by the management server device 60 via the electronic book application. In the e-book service, operations such as registration of original book data, setting of sales price of original book data, setting of royalty price at the time of secondary distribution of e-book, and approval of secondary creation data are possible.

(Display control unit)
A display control unit 251 controls the display output of the display unit 21 . For example, the display control unit 251 displays the operation screen of the electronic book application executed by the application execution unit 250 on the display unit 21 .

<Configuration of primary purchaser's terminal device>
Since the primary purchaser's terminal device 30 basically has the same configuration as the terminal device 20 shown in FIG.

The storage unit 22 stores the primary purchaser's account information instead of the issuer's account information.
The primary purchaser can use the e-book service provided by the management server device 60 via the e-book application executed by the application execution unit 250 . In the electronic book service, operations such as purchase of original book data, registration of secondary creation book data, and setting of sales price of secondary creation book data are possible.

The display control unit 251 displays the operation screen of the electronic book application on the display unit 21 . When activating the electronic book application, the display control unit 251 acquires the authority information of the primary purchaser registered in the user database 610 of the management server device 60, and permits various operations based on the acquired authority information. Toggle ban. For example, if the obtained authority information gives the authority to read the original book data, the display control unit 251 displays a screen that allows it. This browsing screen displays, for example, icons for operation when browsing the original book data. The display control unit 251 displays the original book data when this icon is operated by the primary purchaser.

Specifically, when the icon corresponding to the original book data is operated, the communication unit 23 acquires metadata information included in the NFT of the original book data from the distributed ledger system 50 via the communication unit 23. . For example, if the primary purchaser is the user A11 shown in FIG. 4, the communication unit 23 transmits the metadata information included in the NFT 110 of the original book data, that is, the NFT 110 shown in FIG. Obtained from 50. Then, the communication unit 23 acquires the URL information of the original book data from this metadata, and acquires the original book data from the management server device 60 by accessing the acquired URL information. The display control section 251 displays the original book data acquired by the communication section 23 on the display section 21 .

<Configuration of terminal device of secondary purchaser>
Since the secondary purchaser's terminal device 40 basically has the same configuration as the terminal device 20 shown in FIG.

The storage unit 22 stores the secondary purchaser's account information instead of the issuer's account information.
The display control unit 251 displays the operation screen of the electronic book application on the display unit 21 . When activating the electronic book application, the display control unit 251 acquires the authority information of the secondary purchaser registered in the user database 610 of the management server device 60, and permits various operations based on the acquired authority information. and switch ban. For example, if the obtained authority information gives the authority to read the original book data and the secondary creation book data, the display control unit 251 displays a browsing screen that allows it. This viewing screen displays, for example, a first icon for operation when viewing original book data and a second icon for operation when viewing secondary creation book data. The display control unit 251 displays the original book data when the first icon is operated by the secondary purchaser, and displays the secondary creation book data when the second icon is operated by the secondary purchaser. do.

Specifically, when the first icon or the second icon is operated, the communication unit 23 transmits the metadata information included in the NFT of the secondary creation book data from the distributed ledger system 50 via the communication unit 23 get. For example, if the secondary purchaser is the user B11 shown in FIG. 4, the communication unit 23 is included in the NFT 120 of the secondary creation book data purchased by the user B11, that is, the NFT 120 shown in FIG. Metadata information is obtained from the distributed ledger system 50 . Then, when the first icon is operated, the communication unit 23 acquires the URL information of the original book data from the metadata, and acquires the original book data from the management server device 60 by accessing the acquired URL information. do. In addition, when the second icon is operated, the communication unit 23 acquires the URL information of the derivative work book data from the metadata, and accesses the acquired URL information to obtain the derivative work from the management server device 60. Get book data. The display control unit 251 displays the original book data or secondary creation book data acquired by the communication unit 23 on the display unit 21 .

Note that the display control unit 251 does not display an icon corresponding to an operation for which no authority is granted in the acquired authority information. For example, since the secondary purchaser is not authorized to create secondary creation book data, the display control unit 251 does not display on the display unit 21 a screen on which creation of the secondary creation book data is possible. As a result, secondary purchasers cannot create derivative work book data.

Also, the user B12 who is the secondary purchaser shown in FIG. 4 is granted only the viewing authority for the original book data. Therefore, on the terminal device 40 of the user B12, only the first icon for operating when viewing the original book data is displayed, and the second icon for operating when viewing the secondary creation book data is displayed. not.

<Example of operation of information processing system>
Next, an operation example of the information processing system 10 of the present embodiment will be described with reference to FIGS. 10 and 11. FIG.
As shown in FIG. 10, it is assumed that the issuer operates the terminal device 20 to request the management server device 60 to register the original book data (step S10). This registration request includes information such as the sales price of the original book data set by the issuer and the royalty price at the time of secondary distribution. When the data registration unit 630 of the management server device 60 receives the registration request transmitted from the terminal device 20 (step S20), it creates URL information corresponding to the original book data (step S21), and associates it with the URL information. to register the original book data in the manuscript database 611 (step S22).

After that, when the primary purchaser performs an operation to purchase the original book data on the terminal device 30 (step S40), the terminal device 30 transmits to the management server device 60 that the operation has been performed. When the transaction processing unit 635 of the management server device 60 receives the notification that the original book data has been purchased (step S23), it executes the transaction processing (step S24). Also, the token management unit 634 of the management server device 60 requests the distributed ledger system 50 to issue an NFT corresponding to the purchased original book data (step S25). This NFT includes metadata such as the selling price of the original book data, the royalty price at the time of secondary distribution, and URL information corresponding to the original book data. When the distributed ledger system 50 receives the request from the management server device 60 (step S30), it registers the NFT corresponding to the original book data in the distributed ledger 510 (step S31). Subsequently, the authority setting unit 631 of the management server device 60 grants the primary purchaser authority to browse the original book data, lend authority to lend the original book data, create authority to create secondary creation book data, and the like (step S26). From then on, the primary purchaser can perform operations corresponding to those rights on the electronic book application.

After that, when the primary purchaser performs an operation for browsing the original book data on the terminal device 30, the communication unit 23 of the terminal device 30 acquires the NFT of the original book data from the distributed ledger system 50 (step S41 ), requesting the management server device 60 to browse the original book data based on the URL information included in the acquired NFT (step S42). When this request is received by the communication unit 62 of the management server device 60 (step S27), the communication unit 62 reads the original book data corresponding to the URL information from the manuscript database 611, and sends the read original book data to the terminal device. 30 (step S28). When the communication unit 23 of the terminal device 30 receives the original book data transmitted from the management server device 60 (step S43), the original book data can be displayed on the terminal device 30. FIG. This enables the primary purchaser to view the original book data.

On the other hand, as shown in FIG. 11, it is assumed that the primary purchaser creates secondary creation book data on the electronic book application and then requests the management server device 60 to register it (step S44). This registration request includes information such as the rental price of the original book data set by the primary purchaser and the rental price of the secondary creation book data. When the data registration unit 630 of the management server device 60 receives the registration request transmitted from the terminal device 30 (step S50), it creates URL information corresponding to the derivative work book data (step S51), , and the secondary creation book data is registered in the manuscript database 611 (step S52).

After that, when the secondary purchaser operates the terminal device 40 to purchase the secondary creation book data (step S60), the terminal device 40 transmits to the management server device 60 that the operation has been performed. When the transaction processing unit 635 of the management server device 60 receives the fact that the secondary creation book data has been purchased (step S53), it executes the transaction processing (step S54). Also, the token management unit 634 of the management server device 60 requests the distributed ledger system 50 to issue an NFT corresponding to the purchased secondary creation book data (step S55). This NFT includes the rental price of the original book data, the royalty price at the time of secondary distribution, the rental price of the secondary creation book data, URL information of the secondary creation book data, and the like as metadata. When the distributed ledger system 50 receives the request from the management server device 60 (step S32), it registers the NFT corresponding to the secondary creation book data in the distributed ledger 510 (step S33). Subsequently, the authority setting unit 631 of the management server device 60 grants the secondary purchaser the authority to read the original book data, the authority to read the secondary creation data, and the like (step S56). After that, the secondary purchaser can perform operations on the e-book application according to their authority.

After that, when the secondary purchaser performs an operation to browse the secondary creation book data on the terminal device 40, the communication unit 23 of the terminal device 40 acquires the NFT of the secondary creation book data from the distributed ledger system 50. At the same time (step S61), based on the URL information included in the acquired NFT, the management server device 60 is requested to view the derivative work book data (step S62). When this request is received by the communication unit 62 of the management server device 60 (step S57), the communication unit 62 of the management server device 60 reads derivative work book data corresponding to the URL information from the manuscript database 611, and reads the read data. Then, the secondary creation book data is transmitted to the terminal device 40 (step S58). When the communication unit 23 of the terminal device 40 receives the secondary creation book data transmitted from the management server device 60 (step S63), the terminal device 40 can display the secondary creation book data. This enables the secondary purchaser to browse the secondary creation book data.

<Action and effect>
According to the information processing system 10 of this embodiment described above, the following functions and effects can be obtained.

The management server device 60 includes a storage section 61 , a token management section 634 and a communication section 62 . The storage unit 61 stores original book data and secondary creation book data. Token management unit 634 issues an NFT corresponding to secondary creation book data on distributed ledger 510 . The communication unit 62 communicates with the terminal device 40 . The token corresponding to the secondary creation book data includes URL information for accessing the original book data stored in the storage unit 61 and access to the secondary creation book data stored in the storage unit 61. possible URL information. The communication unit 62 transmits the original book data stored in the storage unit 61 to the terminal device 40 when the terminal device 40 requests access to the former URL information. Further, when the terminal device 40 requests access to the latter URL information, the communication section 62 transmits the secondary creation book data stored in the storage section 61 to the terminal device 40 .
According to this configuration, since the original book data and secondary creation book data can be managed in the storage unit 61, unintended modification thereof can be prevented. Also, if an NFT corresponding to the secondary creation book data is issued on the distributed ledger 510 and the URL information is included in the NFT, by using the URL information, the original book data and the secondary creation The terminal device 40 can easily acquire the book data. As a result, electronic books can be popularized more easily. Furthermore, since the token corresponding to the secondary creation book data is managed as an NFT, it is possible to discriminate unintendedly modified pirated e-book data from genuine original book data and secondary creation book data. becomes easier. As a result, it becomes easier to remove pirated electronic books from the market, and it becomes possible to spread electronic books more appropriately.

The NFT corresponding to the secondary creation book data includes information on the rental price of the secondary creation book data and information on the royalty price at the time of secondary distribution.
According to this configuration, it is possible to easily check the price information.

The token management unit 634 further issues an NFT corresponding to the original book data on the distributed ledger 510 separately from the NFT corresponding to the secondary creation book data. The NFT corresponding to the original book data contains URL information corresponding to the original book data, but does not contain URL information corresponding to the secondary creation book data.
According to this configuration, it is possible to manage the original book data and the secondary creation book data separately, thereby facilitating their management.

The management server device 60 further comprises a secondary creation approval requesting section 633 . The secondary creation approval requesting unit 633 requests the issuer of the original book data to select whether or not to approve the secondary creation data.
According to this configuration, for example, if the publisher does not approve the secondary creation data, the secondary creation data will not be available on the market, so the spread of the secondary creation data that is not intended by the issuer will not occur. can be prevented.

The NFT corresponding to the original book data includes information on the sales price of the original book data and information on the royalty price at the time of secondary distribution.
According to this configuration, it is possible to easily check the price information.

The communication unit 62 transmits the original book data to the terminal device 40 based on a request from the terminal device 40 to access the URL information of the original book data via the dedicated electronic book application. Further, the communication unit 62 transmits the derivative work book data to the terminal device 40 based on a request from the terminal device 40 to access the URL information of the derivative work book data via the dedicated electronic book application. .
According to this configuration, since it is difficult to obtain the original book data and secondary creation book data without going through a dedicated e-book application, it is possible to prevent unauthorized acquisition of such data. Become.

<Other embodiments>
The above embodiment can also be implemented in the following forms.
For example, a primary purchaser who purchases original book data may be able to transfer ownership of the original book data to another person. The transfer may be either paid or gratuitous. It should be noted that the transfer of ownership of original book data may be executable only on a dedicated electronic book application. Information on transfer of ownership of original book data is managed in the distributed ledger system 50 as transaction data of the NFT. Therefore, even if an NFT is issued each time original book data is purchased, it is possible to appropriately manage the owner of each original book data. A similar configuration may be adopted for secondary creation book data.

FIG. 7B illustrates the case where the payment amount of the user B12 who is the secondary purchaser is distributed to the user A12 who is the primary purchaser and the issuer. You may For example, as shown in FIG. 12A, the transaction processing unit 635 adds the difference of 50 yen (=300 yen-250 yen) calculated by subtracting the royalty price at the time of secondary distribution from the rental price to the payment rate. The amount "50 yen x Q" multiplied by Q is deposited into the wallet of the management company. Note that the payment rate Q is a percentage, and is set to 50%, for example. In addition, the transaction processing unit 635 deposits the amount "50 yen x (100-Q)" obtained by multiplying the difference of 50 yen by "100-Q" to the wallet of the issuer. Furthermore, the transaction processing unit 635 deposits 250 yen, which is the royalties price at the time of secondary distribution, into the wallet of the issuer. Also in the case shown in FIG. 8, the payment amount of user B11 may be distributed to user A11 who is the primary purchaser, the issuer, and the management company, as shown in FIG. 12B, for example. .

In the above embodiment, the primary purchaser lends the original book data or secondary creation book data to the secondary purchaser. You can sell it. In other words, the secondary purchaser may be able to purchase the primary purchaser's original book data or secondary creation book data. According to this configuration, a secondary purchaser who has purchased original book data or secondary creation book data from a primary purchaser can sell the data to another user, that is, a tertiary purchaser. In this way, the information processing system 10 of the above-described embodiment can also deal with the n-th purchaser when n is an integer of 2 or more.

As described above, when the primary purchaser of the original book data sells the secondary creation book data created by the secondary creation to the secondary purchaser, the primary purchaser of the original data who created the secondary creation book data It corresponds to the issuer of the creative book data, and the secondary purchaser who purchased the secondary creation book data corresponds to the primary purchaser of the secondary creation book data. In this way, the "primary purchaser" in this embodiment is a person who purchases the original book data from the issuer of the original book data (primary purchaser of the original data) when the original book data is used as a reference. If the creative book data is used as the standard, the person who purchased the derivative work book data from the creator of the derivative work book data (the primary purchaser of the derivative work book data). In addition, the "secondary purchaser" in this embodiment is a person who borrows or purchases the original book data or its secondary creation book data from the primary purchaser of the original data when the original book data is used as the standard. If the secondary creation book data is used as the standard, the person who borrows or purchases the secondary creation book data from the primary purchaser of the secondary creation book data.

In the case where the primary purchaser of the original book data sells the secondary creation book data created by the secondary creation to the secondary purchaser as described above, the secondary purchaser can create new book data from the secondary creation book data. It may be possible to create secondary creations, so to speak, to create tertiary creation book data. In this case, if information such as NFT is set for the tertiary creation book data in the same manner as the secondary creation book data described above, the information processing system 10 of the embodiment can also manage the tertiary creation book data. "Secondary creation data" in this embodiment includes not only electronic content created directly from the original data, but also all electronic content created secondary using the original data. includes all electronic content created as a derivative of the original data.

Electronic content used in the information processing system 10 of the embodiment is not limited to electronic books, and may be music data, still image data, moving image data, and the like.
Note that the present disclosure is not limited to the above specific examples. Appropriate design changes made by those skilled in the art to the above specific examples are also included in the scope of the present disclosure as long as they have the features of the present disclosure. Each element included in each specific example described above, and its arrangement, conditions, shape, etc., are not limited to those illustrated and can be changed as appropriate. As long as there is no technical contradiction, the combination of the elements included in the specific examples described above can be changed as appropriate.

10: information processing system, 40: terminal device, 60: management server device (information processing device), 61: storage unit, 62: communication unit, 63: control unit (computer), 510: distributed ledger, 633: secondary Creation Approval Request Unit, 634: Token Management Unit.

Claims (9)

a storage unit for storing original data of electronic content and secondary creation data created from the original data;
a token management unit that issues a non-substitutable token corresponding to the secondary creation data on a distributed ledger;
A communication unit that communicates with the terminal device,
The token corresponding to the secondary creation data includes first access information for accessing the original data stored in the storage unit, and access to the secondary creation data stored in the storage unit. and second access information capable of
The communication unit
when the terminal device requests access to the first access information included in the token corresponding to the secondary creation data , transmitting the original data stored in the storage unit to the terminal device;
When the terminal device requests access to the second access information included in the token corresponding to the derivative data , the derivative data stored in the storage unit is transmitted to the terminal device. Information processing equipment. 2. The information according to claim 1, wherein the token corresponding to the secondary creation data further includes information on the rental price of the secondary creation data and information on the royalty price at the time of secondary distribution of the electronic content. processing equipment. The token management unit further issues a non-substitutable token corresponding to the original data on the distributed ledger separately from the token corresponding to the secondary creation data,
a token corresponding to the original data includes the first access information but does not include the second access information;
The communication unit
When the terminal device requests access to the first access information included in the token corresponding to the original data, the original data stored in the storage unit is transmitted to the terminal device.
The information processing device according to claim 1 . 4. The information processing apparatus according to claim 3, further comprising a derivative work approval requesting unit that requests a process of selecting whether or not to approve the derivative work data from a publisher of the original data of the electronic content. 4. The information processing apparatus according to claim 3, wherein the token corresponding to the original data includes information on the sales price of the original data and information on the royalty price at the time of secondary distribution of the electronic content. The communication unit
transmitting the original data to the terminal device based on a request for access to the first access information from the terminal device via a dedicated application;
The information processing apparatus according to claim 1, wherein the secondary creation data is transmitted to the terminal device based on a request from the terminal device to access the second access information via the dedicated application. The information processing apparatus according to claim 1, wherein the first access information and the second access information are URL information. a storage unit for storing original data of electronic content and secondary creation data created from the original data;
a token management unit that issues a non-substitutable token corresponding to the secondary creation data on a distributed ledger;
A communication unit that communicates with the terminal device,
The token corresponding to the secondary creation data includes first access information for accessing the original data stored in the storage unit, and access to the secondary creation data stored in the storage unit. and second access information capable of
The communication unit
when the terminal device requests access to the first access information included in the token corresponding to the secondary creation data , transmitting the original data stored in the storage unit to the terminal device;
When the terminal device requests access to the second access information included in the token corresponding to the derivative data , the derivative data stored in the storage unit is transmitted to the terminal device. Information processing system. the computer,
A token management unit that issues non-substitutable tokens on a distributed ledger corresponding to derivative data created from original data;
function as a communication unit that communicates with the terminal device,
The token corresponding to the secondary creation data includes first access information for accessing the original data stored in the storage unit, and access to the secondary creation data stored in the storage unit. possible secondary access information;
The communication unit
when the terminal device requests access to the first access information included in the token corresponding to the secondary creation data , transmitting the original data stored in the storage unit to the terminal device;
When the terminal device requests access to the second access information included in the token corresponding to the derivative data , the derivative data stored in the storage unit is transmitted to the terminal device. Do information processing programs.

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