JP7253678B1 - digital content management system - Google Patents

Abstract

Kind Code: A1 To provide a system for using digital content while protecting the rights attached to the digital content and ensuring the originality of the content. [Solution] Rights such as copyrights, ownership rights, and usage rights attached to digital content are stored in association with the digital content itself, and the transactions of the rights are managed by blockchain to protect them from being tampered with. and a digital content management system that can only perform transactions or operations on digital content that are permitted under said rights. [Selection drawing] Fig. 1

Description

The present disclosure relates to a system for managing copyrights, ownership rights, and licenses of digital content.

Conventionally, digital content has been downloaded to a computer via the Internet or via a recording medium such as a USB memory or CDDVD and used. Digital content may be accompanied by copyrights, ownership rights, licenses (license agreements), etc. In such cases, it is necessary to protect those rights and contracts. Copyright is a right owned by the creator of digital content, can be transferred or waived, and expires upon expiration of the statute of limitations. Ownership is the right to freely dispose, buy and sell digital content, and can be transferred or waived. A license is a license agreement, and is an agreement that restricts the scope of what a copyright holder or owner of digital content grants to a user of the digital content.

Such copyrights, ownership rights, and licenses must be properly protected, but digital content can be easily duplicated, modified, or cut, so rights can be infringed or contract violations can occur. I'm having a problem with At the same time, the reliability and value of digital content may depend on the author or owner, so information about who owns the copyrighted work is important. Since the distribution volume of digital contents is expected to increase more and more in the future, we will provide a system that protects these rights and contracts, clarifies who the right holders and owners are, and prevents falsification. is an important issue.

Special table 2020-521257 Special table 2019-512778

When using digital content via the Internet or recording media such as USB memory, who owns the copyright of the digital content, who owns the ownership, whether the license is attached, and , there is a problem that it is not easy to accurately grasp whether the digital content is the original or the processed one. A secure system that solves these problems and prevents tampering is desired.

This disclosure has been made in view of the above circumstances, and it is necessary to accurately grasp the copyright, ownership, license, etc. of the digital content to be used, and whether it is the original or whether it has been processed. To provide a system in which digital contents can be used in a safe environment where tampering is difficult to occur, without infringing on the rights attached to them, without performing acts that violate licenses, while understanding how to do so. for the purpose.

One aspect of the present disclosure is a digital content management system comprising a plurality of computers that can communicate via a network, digital content that can be transmitted and received by the computers, and a management unit installed in the computers, The digital content has a main body of the digital content and tag information, and the tag information includes the name of at least one of copyright, ownership, or usage right of the digital content and the right. and information of a right holder, wherein the management unit is capable of trading the rights, and the trading of the rights is stored as transaction data including the tag information. It is a content management system.

According to this disclosure, it is possible to easily view right holder information and contract details (licensing items) regarding rights such as copyright, ownership, and right to use digital content when buying, selling, or using digital content. , the originality and processing history of digital content can be confirmed, and at the same time, rights can be protected by restricting transactions and operations that violate the terms of the contract.

1 is a diagram showing a configuration example of a digital content management system according to a first embodiment; FIG. It is a figure which shows the hardware structural example of the computer which concerns on 1st Embodiment, and a server. 3 is a diagram showing a configuration example of digital content and tag information according to the first embodiment; FIG. 2 is a diagram showing a configuration example of digital content management software according to the first embodiment; FIG. It is a figure which shows the structural example of the transaction data list|wrist and transaction data which concern on 1st Embodiment. 3 is a diagram showing a configuration example of a digital content management software generalization section according to the first embodiment; FIG. 4 is a flow chart showing the flow of digital content transaction according to the first embodiment. FIG. 4 is a diagram showing an example of tag information described in digital content transactions according to the first embodiment; FIG. 10 is a diagram illustrating a configuration example of a computer having a blockchain function according to a second embodiment; FIG. FIG. 10 is a diagram showing a configuration example of time-series block data of a blockchain according to the second embodiment; It is a figure which shows the structural example of the transaction data which concerns on 2nd Embodiment. FIG. 10 is a diagram showing an example of tag information of crypto assets according to the second embodiment; FIG. 10 is a flow chart showing a method of generating a block chain and crypto assets and paying a reward according to the second embodiment; FIG.

Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of well-known matters and redundant descriptions of substantially the same configurations may be omitted. This is to avoid unnecessary verbosity in the following description and to facilitate understanding by those skilled in the art. It should be noted that the accompanying drawings and the following description are provided for a thorough understanding of the present disclosure by those skilled in the art and are not intended to limit the claimed subject matter.

The function of one configuration shown in the embodiment may be implemented by two or more physical configurations, or the functions of two or more configurations may be implemented by, for example, one physical configuration.

<First Embodiment>
A first embodiment of the present invention will be described below.

<Overview of system configuration>
FIG. 1 shows a configuration example of a communication network of a digital content management system.
In the digital content management system 10, a plurality of computers 30 and a server 30-S are connected to the communication network 20 so as to be able to communicate with each other.

When indicating that the computer is different, add a computer number "-m" (m=1, 2, . Notation like In addition, when distinguishing the software, parts, functions, digital contents, etc. of the computer 30-m for each computer, add the computer number "-m" to the code of the software, parts, functions, digital contents, etc. , for example, the digital content 50 is represented as a digital content 50-m. However, what the server has is distinguished by adding "-S" and writing like 40-S.

The computer 30 can download and install the digital content management software 40 from the digital content management software control unit 60 of the server 30-S. Digital content management software 40 manages digital content 50 . However, there may be a computer 30 that does not have the digital content 50, like the computer 30-2.

Computer 30 can trade digital content 50 with other computers 30 using digital content management software 40 . For example, computer 30-1 can trade digital content 50-1 with other computers 30-2 and 30-3.

The server 30 -S has a digital content management software generalization section 60 and serves as a site from which the computer 30 downloads the digital content management software 40 . When the version of the digital content management software 40 is upgraded, the server 30-S can notify the computer of this and upgrade the version. Also, the server 30 -S has digital content management software 40 and can trade digital content 50 with other computers 30 .

The communication network 20 may be wired or wireless, and the communication standard is not particularly limited. Examples of the communication network 20 include the Internet network, 4G, 5G, Wi-Fi (registered trademark), etc., or a mobile communication network (eg, LTE (Long Term Evolution)).

<Hardware configuration of computer and server>
FIG. 2 shows an example of the hardware configuration of the computer 30 and server 30-S.
The computer 30 and the server 30-S are provided with an input operation unit 31, a display unit 32, a memory unit 33, a storage unit 34, a communication unit 35, and a processor unit 36 as hardware. However, the server 30-S does not necessarily need to include the input operation section 31 and the display section 32. FIG.

The input operation unit 31 receives input operations such as keyboard character input, mouse input, microphone voice input, touch panel input, button input, and the like. The input operation unit 31 of the computer 30 is used for inputting operations such as transaction of the digital content 50 and duplication and processing of the digital content 50 .

The display unit 32 is configured by a display device. It may be a liquid crystal display, an organic EL display, an inorganic EL display, a CRT (cathode-ray tube) display, or the like. The display unit 32 of the computer 30 displays, for example, a mouse cursor, the digital content 50, the digital content management software 40, the digital content management software generalization unit 60, and the like.

The memory unit 33 includes a volatile storage medium or a nonvolatile storage medium. The memory 33 may include ROM (Read Only Memory) and RAM (Random Access Memory). The memory unit 33 may store computer programs and data for realizing the functions of the computer 30 or the server 30-S. Digital content management software 40 and digital content 50 may be stored in the memory unit 33 of the computer 30 . The memory unit of the server 30-S may store the digital content management software 40 and the digital content management software generalization unit 60. FIG.

The storage 34 is configured including a non-volatile storage medium. The storage 34 may be configured by at least one of flash memory, SSD (Solid State Drive), and HDD (Hard Disk Drive), for example. The storage 34 may store computer programs and data that implement the functions of the computer 30 or server 30-S. Digital content management software 40 and digital content 50 may be stored in the storage 34 of the computer 30 . The storage 34 of the server 30-S may store the digital content management software control section 60 and the digital content management software 40. FIG.

The communication unit 35 controls transmission and reception of data and programs via the communication network 20 . The communication unit 35 may be read as other terms such as a communication interface, a communication circuit, or a communication module.

The processor unit 36 realizes the functions of the computer 30 or the server 30-S in cooperation with the components 31-35. For example, the processor unit 36 reads out a computer program or server program from the memory unit 33 or the storage unit 34 and executes it, thereby realizing the functions of the computer 30 or the server 30-S. The processor unit 36 includes a CPU (Central Processing Unit), an LSI (Large Scale
Integrated Circuit), ASIC (Application Specific Integrated
Circuit), FPGA (Field Programmable Gate Array), controller, or control circuit. The processor unit 36 of the computer 30 may read and execute digital content management software 40 . The processor section 36 of the server 30-S may read and execute the digital content management software generalization section 60 and the digital content management software 40. FIG.

<Composition of digital content>
FIG. 3(a) shows an example of components of the digital content 50. FIG. FIG. 3B shows a description example of tag information 52 of digital content 50 . FIG. 3(c) shows an example in which the contract content of the tag information 52 is described on a separate sheet 59. FIG.

The digital content 50 includes a digital content body 51 and tag information 52, as shown in FIG. 3(a).

The digital content body 51 is composed of numerical values, data, texts, images, etc. in digital form. For example, numerical data, measurement data, point cloud data, three-dimensional data, text data, image data, databases, CAD (computer aided design) models, music files, video files, game software, program software, websites, digital art, It may be a crypto asset, etc.

FIG. 3(b) shows an example of the tag information 52. As shown in FIG. In the tag information 52 of the digital content 50, the name 53 of the digital content body 51 and information related to at least one right of copyright, ownership, or right of use attached to the digital content body 51 are described in a right name 54 column. be done. For each right, the date and time 55 when the right occurred, the right holder 56, the contract content 57, and the price 58 may be included. Furthermore, a remark column (not shown) may be provided.

The right holder 56 is an individual or a corporation, and the name of the individual or corporation may be entered in the column for the right holder 56 . In addition, personal or corporate addresses, contact information, telephone numbers, e-mail addresses, URLs of homepages, etc. may be described.

As the rights name 54, patent rights, trademark rights, and other rights may be added in addition to copyrights, ownership rights, and usage rights.

In the example of FIG. 3(b), the right name 54 is the usage right column, and the date 55 and right holder 56 are blank. In this case, "AA" has the usage right.

The contract content 57 may be left blank or a legal name may be entered. For example, if the column of contract content 57 for copyright is blank, the content of the contract is simply not set at the time of transaction, and the copyright law stipulated by law is applied.

In this digital content 50, the right name 54 is a column of copyright, and the right holder 56 is described as "AA", indicating that the current copyright holder is "AA".

The contract content 57 can describe the contract content proposed by the current right holder in the transaction. For example, if "assignment" is written in the column of copyright agreement content 57, the copyright is transferred in free or charged transactions. In case of assignment, the original rights holder has no copyright and the new rights holder has the copyright.

If the transaction is for a fee, the transaction price may be entered in the column of price 58 . For example, if "assignment" is written in the column of copyright agreement content 57 and the price of XX yen is written in the price column of 58, it means that the copyright transfer price is XX yen.

For example, in the ownership column of the right name 54, if "sale" is entered in the contract content 57 column and "XX yen" is entered in the price 58 column, it means that the ownership can be purchased at this price. . In this case, since there is no description regarding the copyright in the contract content 57 of the ownership, it means that the copyright is not transferred.

If the description of the contract content 57 becomes long, the contract content 57 may be described on a separate sheet 59 as shown in FIG. 3(c). For example, in the right column of the right name 54, "Attachment ID 1" is written in the contract content 57, and in the attachment 59, redistribution is prohibited, duplication, processing, modification is prohibited, usage fee is free, usage period is 3 years, etc. may be entered. As Attachment 59, you may describe the contents of the license (LICENSE) that is open to the public.

The content of the contract may be decided before the transaction. Also, in a transaction, it may be determined through negotiation between the parties.

<Configuration of digital content management software>
FIG. 4 shows a configuration example of the digital content management software 40. As shown in FIG. FIG. 5(a) shows the structure of a transaction data list 41, which is one of the components of the digital content management software 40. FIG. FIG. 5(b) shows a configuration example of the transaction data 47 that constitutes the transaction data list 41. As shown in FIG.

As shown in FIG. 4, the digital content management software 40 includes a transaction data list 41, a communication management A section 42 that communicates the transaction data list 41 with another computer 30 via the communication network 20, and a digital content 50 transaction. a digital content trading unit 43 that executes; a transaction violation detection unit 44 that detects violations of transactions performed by the digital content trading unit 43; and an operation violation detection unit 46 that detects a violation of the operation content performed by the digital content operation unit 45 .

The digital content trading unit 43 can trade the rights described in the tag information 52 of the digital content 50 . The transaction means buying and selling at least one right of copyright 53, ownership 54, or right of use 55 described in the tag information 52 of the digital content 50, transferring for a fee/free of charge, lending for a fee/free of charge, etc. That is.

The digital content trading unit 43 can set contract details 57 attached to the right when trading at least one of the copyright, the ownership right, and the right to use described in the tag information 52 of the digital content 50. .

As shown in FIG. 5( a ), the result of trading by the digital content trading unit 43 is stored as transaction data 47 in the transaction data list 41 . The transaction data list 41 may store all past transaction data 47 traded by the digital content trading section 43 .

The digital content trading unit 43 can transmit, receive, download, view, etc. the digital content 50 based on the rights and contract details 57 described in the transaction data 47 .

The digital content trading unit 43 has a general function of negotiating with a counterparty in trading (not shown). For example, it has functions for contacting and conversing via e-mail, chat, telephone, etc., and functions for selecting whether to accept or not to accept the contents of negotiations, etc., and it is possible to negotiate with the other party and proceed with the transaction. .

As shown in FIG. 5(b), transaction data 47 includes transaction date and time 47A when the transaction was concluded, transactor 47B indicating who and whom the transaction was executed with, transaction content 47C, digital contents of tag information 52 may be included. Transaction data 47 may include annex 59 if tag information 52 includes annex 59 .

The content of the transaction 47C includes, for example, "copyright transaction". This indicates that the copyright of the right name 54 of the tag information 52 has been traded according to the content described in the contract content 57 . Also, if "transaction of ownership" is described, it indicates that the ownership of the right name 54 of the tag information 52 has been traded with the content described in the contract content 57. FIG. Also, if it is described as "transaction of right to use", it indicates that the right to use of the right name 54 of the tag information 52 has been traded with the content described in the contract content 57. FIG.

The digital content trading unit 43 creates transaction data 47 from the tag information 52 when registering the digital content 50 . In this case, since the transaction has not yet been concluded, the date and time of transaction 47A, the transactor 47B, and the content of transaction 47C are left blank.

The communication management A section 42 shown in FIG. 4 can communicate data between the server 30-S and the computer 30 using a client-server communication function. Using this communication function, the computer 30 may download the digital content management software from the digital content management software control section 60 of the server 30-S. Also, the digital content management software generalization section 60 of the server 30 -S may update the version of the digital content management software 40 that the computer 30 has.

The communication management A section 42 can transmit transaction data 47, which are the results of transactions performed by the computer 30, to the server 30-S. The computer 30 can also receive transaction data 47 held by the server 30 -S and update the transaction data list 41 .

The transaction violation detection unit 44 can detect whether the transaction performed by the digital content transaction unit 43 violates the copyright, ownership, or usage rights described in the tag information 52 of the digital content 50 . For example, if a non-copyrighted, proprietary seller attempts a transaction to sell a copyright, the transaction violation detector 44 detects that the transaction violates the rights.

The transaction violation detection unit 44 can detect whether or not the transaction performed by the digital content transaction unit 43 violates the contract content 57 attached to copyright, ownership, or right of use. The violation is detected by comparing the contract content 57 with the content of the new transaction. For example, the owner of the digital content 50 whose ownership contract content 57 states, "Ownership for 3 years from MM/DD/YYYYY" sells the ownership of the digital content 50 for an indefinite period of time. is attempted, the transaction violation detection unit 44 detects that the contract content 57 is violated.

If a transaction violation is detected, a warning can be issued indicating the violation. It can also stop a transaction if it detects a transaction violation.

The digital content operation unit 45 can perform operations such as duplication (full duplication, partial duplication), processing, correction, cut, addition, deletion, etc. on the digital content 50 .

The operation violation detection unit 46 can detect whether or not the operation performed by the digital content operation unit 45 violates the contract content 57 attached to copyright, ownership, or usage rights. Violations are detected by checking whether operations such as “copy”, “delete”, “ process ”, “addition”, etc. performed by the digital content operation unit 45 violate the contract details 57 .

If an operation violation is detected, a warning can be issued indicating the violation. It is also possible to stop the operation when a violation of the operation is detected.

<Structure of Digital Content Management Software Division>
FIG. 6 shows a configuration example of the digital content management software generalization unit 60. As shown in FIG.

The digital content management software generalization unit 60 includes a digital content management software download unit 61, a user information storage unit 62 for storing user information of the digital content management software 40, and a transaction data history unit 63 for the digital content 50 that has been traded. Prepare.

Digital content management software download unit 61 has a function for computer 30 to download digital content management software 40 . Also, when the version of the digital content management software 40 is updated, the version of the digital content management software 40 installed in the computer 30 can be upgraded.

The digital content management software download unit 61 acquires the IP address of the computer 30 and stores it in the user information storage unit 62 when the computer 30 downloads the digital content management software 40 . When the user of the computer 30 downloads the digital content management software 40, the user name of the user information storage unit 62 may be obtained by having the user enter it. The date and time of user registration in the user information storage unit 62 may be the date and time when the user downloaded the digital content management software 40 .

The transaction data history unit 63 stores the transaction data 47 of the digital content 50 traded by all the computers 30 .

<Flow chart showing an example of transaction of digital contents>
FIG. 7 is a flow chart showing the flow of registering the digital content 50 in the digital content management software 40 and trading.

The computer 30-1 and the computer 30-2 shown in FIG. 1 activate the digital content management software 40-1 and the digital content management software 40-2, respectively, and the flowchart of FIG. 7 starts.

In step S100, the user AA of the computer 30-1, who is the copyright holder and owner of the digital content body 51-1 "3D measurement point cloud data of the city X" of the digital content 50-1, obtains the right to trade. The content is entered and registered in the tag information 52-1 (FIG. 8(a)) using the digital content management software 40-1.

In FIG. 8(a), the name is "3D measurement point cloud data of the entire city of X", the right name is "copyright", "ownership", and "usage right", and each right is generated at the date and time. The date and time “2020/7/1, 15:22” is entered, and “AA” is entered in the column of each right holder. If "AA" is written as the right holder, it indicates that the current right holder is "AA".

The contents of the contract for each right in Fig. 8(a) include "assignment", "sale", and "listed in Attachment No. 1" 59-1, and Attachment 59-1 shown in Fig. 8(b). is attached. "○ yen", "X yen", and "free" are entered in the column of "price". The price is the amount for executing the contents of the contract. ○ yen is required to transfer the copyright, and &#9747; yen is required to sell the ownership, and the right to use can be obtained free means.

The tag information 52-1 including the attachment 59-1 is stored in the transaction data list 41-1 as transaction data 47-1, as shown in FIG. 5(b). Since the transaction has not yet been concluded here, there is no description in the transaction date 47A, the transactor 47B, and the transaction content 47C of the transaction data 47-1. This transaction data 47-1 is transmitted to the digital content management software generalization section 60 and registered by the operation of the communication management A section 42. FIG.

In step S101, the digital content management software control section 60 of the server 30-S receives the transaction data 47-1 and stores it in the transaction data history 63. FIG. At the same time, since there is no description in transaction date 47A, transactor 47B, and transaction content 47C, the data is distributed to all computers 30 as pre-transaction data. The user of the computer 30 can view the distributed transaction data tag information 52-1 and attached sheet 59-1 at the digital content transaction section 43-2.

In step S102, the user of the computer 30-2 determines whether or not to trade the digital content body 51-1 according to the presented contract details. If the transaction is to be carried out as it is, the process proceeds to step S102 "yes", the transaction is established, and the process proceeds to step S108.

If the customer wants to change the contract and trade, proceed to step S102 "No" and proceed to step S103.

In step S103, the desired contract content is communicated to the right holder. This time, a right holder sent a request for the right to use, but we would like you to extend the period of use specified in the contract to 5 years, using the e-mail function (not shown) of the Digital Content Trading Department 43-2. Send to a certain computer 30-1.

In step S104, the right holder of the digital object 50-1 can either approve (“yes” in step S104) or reject (“no” in step S104) the modification of the contract.

If the change of contract content is approved ("Yes" in step S104), the transaction is established and the process proceeds to step S108.

If the contract change is rejected (“No” in step S104), the right holder of the digital object 50-1 either renegotiates the offer to change the contract (“Yes” in step S105) or rejects it. ("No" in step S105) or can be selected.

When renegotiating ("YES" at step S105), the content to be changed is sent to the user of the computer 30-2, and renegotiation is performed (step S106). Then, the process enters step S103 again.

If not to renegotiate (step S105 "No"), the transaction can be aborted.

At step S108, the transaction is established. If the contract content is changed, the tag information 52 is changed and the transaction data 47 is created. Transaction data 47 is added to transaction data list 41 of digital content management software 40 and stored.

At step S109, the transaction data 47 is transmitted to the digital content management software control unit 60, added to the transaction data history unit 63, and stored. This concludes the transaction flow.

<Detection of violation of rights and contract details>
The user of the computer 30-2 has the rights to the digital content 50-1 according to the rights traded and the contents of the contract. In the transaction shown in the flowchart of FIG. 7, the right to use described in attachment 59-1 is given, and the digital content body 51 can be downloaded and used.

If the user of the computer 30-2 who has downloaded the digital content body 51 attempts to violate the attached sheet 59-1 of the contract, the transaction violation detection unit 44 can detect the violation and issue a warning. Also, the transaction violation detection unit 44 can detect the violation and stop the violation.

As shown in FIG. 8, if the attachment 59-1 of the content of the usage right contract states that "redistribution is prohibited", if the user of the computer 30-2 takes an action that leads to redistribution, "the transaction is violating the terms of the contract," and the operation of the computer 20 is stopped. For example, when the digital content body 51 is sent by e-mail using the e-mail function (not shown) of the digital content management software 40, the message "This digital content cannot be sent by e-mail" is displayed, and the e-mail is not sent. is discontinued.

Also, if the user of the computer 30-2 who has downloaded the digital content main body 51 attempts to perform an operation that violates the attached sheet 59-1 of the contract details, the operation violation detection unit 46 of the digital content management software 40 detects the violation, Warn and stop violations. According to the content of this contract, "duplication, processing, and alteration are prohibited". is violating the terms of the contract," and the operation of the computer 20 is stopped.

In the first embodiment, the server 30-S is provided separately from the computer 30, but the functions of the server 30 may be added to the computer 30 and the server 30-S may be deleted.

In the first embodiment, the transaction data 47 registered in the digital content management software 40 is distributed to all the computers 30 by the digital content management software control unit 60. The tag information 52 may be transmitted only when the unit 60 is accessed.

<Second embodiment>
A second embodiment of the present invention will be described below. In the second embodiment, a blockchain function is introduced to prevent falsification of the digital content body 51, tag information 52, and transaction data 47. FIG.

<Blockchain function>
FIG. 9 shows the configuration of the computer 30 in which the blockchain function 70 is installed. FIG. 10 shows a configuration example of the block chain 71. As shown in FIG. FIG. 11 shows a configuration example of transaction data.

The blockchain function 70 is installed on the computer 30 and the server 30-S connected to the network 20 together with the digital content management software 40. FIG. Although FIG. 9 shows the case where the digital content 50 exists in the computer 30, there may be a computer 30 in which the digital content 50 does not exist.

As shown in FIG. 9 , the blockchain function 70 includes a blockchain 71 , a blockchain creating section 72 , a hash function section 73 , a nonce value generating section 74 and a communication management B section 75 .

A blockchain 71 is created by a blockchain creator 72 . As shown in FIG. 10, the block chain 71 has a structure in which time-series block data 80 and 80_i are continuously connected. The suffix _i is an index indicating a time series, and takes values of i=1, 2, .

Block data 80 includes hash value 81 , transaction data list 41 and nonce value 82 . Transaction data list 41 is composed of transaction data 47 .

The transaction data 47 entered in the transaction data list 41 is also entered in the transaction data list 41 of the computer 30 participating in the calculation of the hash value 81 via the communication management B section 75 . The transaction data list 41_n of the computer 30 participating in the calculation of the hash value 81 is determined by collecting the transaction data 47 for a certain period of time. After the transaction data list 41_n is finalized, subsequent transaction data 47 is entered in the transaction data list 41_n+1.

As shown in FIG. 11, transaction data 47 includes transaction date and time 47A, transactor 47B, transaction content 47C, and digital content tag information 52, as shown in FIG. 5B. Here, the hash value 83 of the digital content body is also included. The hash value 83 of the digital content body is a hash value calculated by the hash function unit 73 from the digital content body 50-1.

The communication management B unit 75 is a P2P (Peer
to Peer) communication function, every time the transaction data list 41 and block data 80 of the other computer 30 are updated, it can be detected and the block data 80 of its own computer 30 can be updated. .

<Blockchain generation process>
Based on FIG. 10, the generation process of the block chain 71 is shown. The suffix _i of the code indicates a time-series index. i=1 corresponds to the first block data 80_1, i=n corresponds to the block data 80_n including the latest transaction data list 41_n, and i=n+1 corresponds to the next block data 80_n+1.

The block chain 71 has a structure in which time-series block data 80_i are continuously linked. The block data 80_n includes a hash value 81_n created from the previous block data 80_n−1, the latest transaction data list 41_n, and a nonce value 82_n.

The transaction data list 41_n includes a series of transaction data 47, and the series of transaction data 47 includes a hash value 83 of the traded digital content body 51 (FIG. 11), so the digital content body 51 may change at some point. If so, the change can be detected by comparing the hash value 83 of the digital content itself.

For example, the hash value 83 of the latest digital content main body described in the transaction data 47 in the transaction data list 41_n is described in the transaction data 47 of the past time-series transaction data 41_i (i=1 to n−1). If the transaction data 47 of which block data 80 the digital content body 51 is different from the hash value 83 of the obtained digital content body sequentially, it can be detected.

If it is not detected when the digital content body 51 was changed, the hash value of the digital content body 51 may not be included in the transaction data 47 .

The transaction data 47 includes tag information 52 of the digital content, as shown in FIG. Therefore, by tracing the transition of the tag information 52, it is possible to know the original copyright holder, owner, and the like.

Hash values 80_i (i=1 to n+1) shown in FIG. The hash function of the hash function unit 73 calculates the same hash value from the same digital content, but calculates a completely different hash value from even slightly different digital content. As hash functions of the hash function unit 73, SHA-1 (Secure Hash Algorithm 1), SHA-256 (Secure Hash Algorithm 1),
Algorithm 256), or RIPEMD-160 (RACE Integrity Primitives
Evaluation Message Digest) or the like may be used. SHA-1 and RIPEMD-160 generate a 160-bit hash value from digital content of arbitrary length, and SHA-256 generates a 256-bit hash value.

When the latest transaction data list 41_n is determined, the hash function unit 73 starts calculating the hash value 81_n+1. The hash value 81_n+1 is calculated using the hash value 80_n calculated from the block data 80_n−1, the transaction data list 41_n, and the nonce value 82_n, and stored in the block data 80_n+1.

Hash function unit 73 outputs a hash value with a specific number of digits, but it is not possible to predict what kind of value will be output. Therefore, for example, by determining a rule such as setting a hash value whose first five digits are occupied by 0 as a proper hash value 81, the nonce value is changed until a proper hash value 81 is output. You have to keep calculating the hash value. As a result, the amount of calculation increases, and it takes time to calculate the proper hash value 81 .

When the proper hash value 81_n+1 is calculated, the nonce value 82_n used for the calculation is stored in the block data 80_n. By storing the nonce value 82_n in the block data 80_n, the hash value 81_n, the transaction data 47_n, and the nonce value 82_n forming the block data 80_n are all determined, and the block data 80_n is determined.

The hash value 81_n+1 is fixed by being written, after which the hash value 81_n+1 cannot be written or overwritten.

When the block data 80_n is determined, the communication management B section 75 updates the block chains 71 of all the computers 30, and the latest block chains 71 are shared.

Tampering with the block chain 71 becomes difficult because it takes time to calculate the proper hash value 81 . This is because if one piece of time-series block data 80_i (where i is any one of 1 to n) is falsified, all subsequent block data 80_i' (i'= This is because the hash values of all values i+1 to n) are different, and all these hash values must be recalculated.

When block data 80_n is determined, it is shared among all computers 30, but if this hash value 81_n differs among computers 30, a majority vote may be adopted as a method of determining what is correct. .

By adopting the majority vote, even if some computers 30 tamper with the data and the hash value 81_n differs from that of the other computers 30, the majority computer 30 assumes that the hash value 81_n is correct. It is possible to fix a tampered blockchain.

In general, when the number of computers 30 is large, it is difficult to break into a large number of computers 30 and tamper with the block chain 71 thereof.

By introducing the block chain function 70 in this way, it becomes difficult to tamper with the block data 80 of the block chain 71, and the transaction data 47 possessed by the block data 80, that is, the transaction date and time 47A, the transactor 47B, the transaction details 47C, It becomes difficult to falsify the tag information 52 of the digital content, the hash value 83 of the body of the digital content, and the like.

<Generation and transfer of crypto assets>
It is not easy to calculate the proper hash value 81_n+1 and enter it in the block data 80_n+1, that is, to determine the block data 80_n. , requires a cost. Therefore, by paying a reward for determining the block data 80_n, it is possible to increase the number of computers 30 participating in the calculation of the proper hash value 81_n+1.

A cryptocurrency is given as a reward for fixing the block data 80_n. It is assumed that crypto assets are generated only by finalizing block data 80_n.

The cryptographic asset calculates a proper hash value 81_n+1, writes the hash value 81_n+1, and transfers its ownership free of charge as a reward for fixing the block data 80_n.

Since cryptographic assets can be regarded as digital content, they can be the targets of transactions in the present embodiment. FIG. 12 is an example in which cryptographic asset tag information 52 included in the transaction data 47 is described, assuming that payment of a reward for cryptographic assets is a transaction of digital content 50 .

The name 53 is "Crypto asset XX", and the copyright holder 56 is the name of the company that issued the crypto asset "◎◎". This description means that even if the transaction is made, the copyright will not be transferred, and it will belong to "◎◎". The contract content 57 of the ownership is "1.0 transfer", and the price 58 is "free", indicating that 1.0 units of the cryptographic asset will be transferred free of charge. By trading using the transaction data 47 having such tag information 47, crypto assets can be given as a reward.

<Transaction of digital contents and issuance of crypto assets>
In the second embodiment, the blockchain function 70 is introduced into the transaction of the digital content 50 to make it difficult to tamper with the data, and by contributing to the confirmation of the blockchain 71, crypto assets are given as a reward. However, the flow will be described with reference to the flow chart of FIG.

In computers 30-1 and 30-2, the digital content management software 40 installed with the blockchain function 70 is activated, and the transaction of the digital content 50 becomes possible, and the flowchart starts.

In step S200, a transaction of certain digital content 50 is established between the computers 30-1 and 30-2.

In step S201, transaction data 47 indicating transaction details are generated in the latest transaction data list 41_n of the computers 30-1 and 30-2.

In step S202, the computer 30 participating in the hash value calculation shares the transaction data list 41_n of all other computers 30, and adds the latest transaction data 47 to the transaction data list 41_n.

The transaction data list 41_n is generated in the block data 80_n and is finalized after a certain period of time has passed. Therefore, in step S203, it is checked whether or not a certain period of time has elapsed. If "yes", the process proceeds to step S204, and if "no", the process returns to step S200 and waits for the next transaction to be concluded.

In step S204, the computer 30 participating in hash value calculation detects that the transaction data list 41 has been finalized. New transaction data 47 cannot be added to the confirmed transaction data list 41_n.

In step S205, the computer 30 participating in the calculation of the hash value starts calculating the hash value 81_n+1 from the block data 80_n in response to the determination of the transaction data list 41_n.

In step S206, it is checked whether the calculated hash value is a proper hash value according to a predetermined rule. If "no", the process proceeds to step S207, and if "yes", the process proceeds to step S208.

In step S207, the nonce value 82_n is changed, the hash value is calculated again, and the process returns to step S206.

In step S208, since the proper hash value has been obtained, it is checked whether the hash value 81_n+1 has not yet been entered in order to enter the hash value 81_n+1. If "No", the hash value 81_n+1 has already been entered, so the hash value 81_n+1 cannot be entered, and the calculation of the hash value is stopped (step S209). If yes, go to next step 210 .

In step S210, the hash value 81_n+1 is entered. The hash value 81_n+1 is determined by entering it. At the same time, the nonce value 82_n is also determined, and the block data 80_n is determined.

In step S211, a specified amount of cryptocurrency is paid as a reward for fixing block data 80_n.

In step S212, the crypto assets are treated as the digital content 50, and payment for the crypto assets is performed by a transaction of "transferring ownership without charge." Since the transaction with the crypto asset as the digital content 50 has been established, the process returns to step S201, and the transaction data 47 is generated and described in the latest transaction data list 41_n.

In the second embodiment, the computer 30 participating in the calculation of the hash value 81_n+1 calculates the hash value 81_n+1.

In the second embodiment, the generated cryptographic asset was stored as transaction data in the block chain like other digital contents. good.

The block chain mechanism, cryptographic assets generation method, and cryptographic asset payment method described in the second embodiment are examples, and other methods and mechanisms can be used.

The present disclosure makes it possible to easily know information about the copyright, ownership, and usage rights of digital content and their transaction history when trading digital content via a communication network, and It is useful in preventing falsification of

10 Digital content management system 20 Communication network 30 Computer 30-S Server 31 Input operation unit 32 Display unit 33 Memory unit 34 Storage unit 35 Communication unit 36 Processor unit 40 Digital content management software 41 Transaction data list 42 Communication management A unit 43 Digital content Transaction section 44 Transaction violation detection section 45 Digital content operation section 46 Operation violation detection section 47 Transaction data 47A Transaction date and time 47B Trader 47C Transaction content 50 Digital content 51 Digital content body 52 Tag information 53 Name 54 Right name 55 Date and time 56 Right holder 57 Contract content 58 Price 59 Attachment 60 Digital content management software control unit 61 Digital content management software download unit 62 User information storage unit 63 Transaction data history unit 70 Block chain function 71 Block chain 72 Block chain creation unit 73 Hash function unit 74 Nonce value generation Section 75 Communication Management B Section 80 Block Data 81 Hash Value 82 Nonce Value 83 Hash Value of Digital Content Body

Claims (6)

A digital content management system comprising a plurality of computers that can communicate via a network, digital content that can be transmitted and received by the computers, and a management unit installed in the computers,
The digital content has a main body of the digital content and tag information,
The tag information includes the name of at least one of the copyright, ownership, or usage right of the digital content, and information of the right holder who has the right,
The management unit registers the contents of the rights transaction, completes the rights transaction, stores the contents of the rights transaction as transaction data including the tag information,
The computer has a blockchain system composed of a blockchain in which block data is linked in time series,
The block data has the transaction data, a hash value calculated from the previous block data, and a nonce value,
The block data is determined when a rule with a new hash value calculated using the transaction data, the hash value, and the nonce value is followed;
A digital content management system , wherein a cryptographic asset is generated as the digital content and a reward is paid in response to the calculation of the new hash value for which the block data is determined. 2. The digital contents management system according to claim 1, wherein the contractual content relating to the right transaction is attached to the tag information to carry out the right transaction. The management unit compares the content of the right transaction with the right or the content of the contract, and detects whether or not the transaction of the right corresponds to a violation of the right or the content of the contract. 3. The digital content management system according to claim 2 , further comprising a transaction violation detection function. 4. The digital contents management system according to claim 3 , wherein said transaction violation detection function issues a warning or does not establish said transaction when said transaction violation is detected. The management unit has a function of manipulating the digital content, detects an operation performed on the digital content through the function of manipulating, and compares the operation with the right or the content of the contract. 5. The digital contents management according to claim 2 , further comprising an operation violation detection function for detecting whether or not said operation corresponds to an operation violation that violates said right or said contract content. system. 6. The digital contents management system according to claim 5, wherein said operation violation detection function issues a warning or does not allow said operation when said operation violation is detected.

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