WO2011043171A1

WO2011043171A1 - Copyrighted work redistribution promotion system

Info

Publication number: WO2011043171A1
Application number: PCT/JP2010/066007
Authority: WO
Inventors: 平野　昇; 久靖山崎
Original assignee: 株式会社シーエスサービス
Priority date: 2009-10-07
Filing date: 2010-09-16
Publication date: 2011-04-14
Also published as: TW201115388A; JP2011081628A

Abstract

Disclosed is a copyrighted work redistribution promotion system capable of easily generating a copyrighted work file for redistribution use, greatly reducing communication load at that time, improving security, and protecting copyrights while significantly improving convenience of redistribution. The disclosed copyrighted work redistribution promotion system uses ancillary information of a copyrighted work, an executable program, and a management server configured to be connectable through a network to a client terminal; wherein the ancillary information has a data structure having an identification information portion and/or a distributor information portion including sequentially distributed client information, and the executable program causes the client terminal to perform processing of each of an ancillary information transmission step and a redistribution-use copyrighted work generation step.

Description

Copyrighted redistribution promotion system

The present invention relates to a copyrighted work redistribution promotion system, and more particularly, to a copyrighted work redistribution promotion system that is excellent in convenience and security.

In recent years, the Internet system and the like have been greatly developed, and by using such a telecommunication line and a communication terminal such as a personal computer or a mobile terminal as an IP (Internet Protocol) communication device, a copyrighted work such as a CD or a DVD. Selling and providing is becoming widespread.

Conventionally, from the viewpoint of protecting copyrights by eliminating illegal copying, it has been attempted to prevent duplication of copyrighted works in such sales using the Internet, and various techniques have been developed. For example, when the receiving device detects that the content is copy-prohibited content based on the copyright protection information, the system increases the data rate and outputs the content to prevent normal copying (see Japanese Patent Laid-Open No. 2003-199023), There is a system (see Japanese Patent Laid-Open No. 8-6784) that cannot be renewed by a non-authorized purchaser even if it is illegally copied and cannot be used after a certain period of time.

Such a system that restricts copying of copyrighted works has certain effects from the viewpoint of copyright protection. However, in order to purchase a copyrighted work, each purchaser needs to access a server etc. via the Internet and download it individually. Recently, the data size of such a copyrighted work has become very large. The time required for downloading has become longer, and the communication load has become very large. Therefore, if the conventional method is used as it is, there is a risk that the distribution of the copyrighted work may be sluggish.

However, on the other hand, there are requests from copyright holders and production companies to distribute the work more widely. By promoting the distribution of copyrighted works in this way, it contributes to the development of culture and industry. In order to meet such a demand, there is a method of promoting the distribution by changing from the conventional method, for example, permitting copying of the copyrighted work and permitting the distribution of the copyrighted work sequentially. However, in such a method, in order to maintain the protection of copyright, more advanced technology is required for illegal copy countermeasures, and the procedure for redistributing the copyrighted work becomes complicated. It is still difficult to promote distribution. For this reason, there is a need for a system that can facilitate the redistribution of a copyrighted work while protecting the copyright, and can promote the distribution of the copyrighted work, but does not exist at present.

Japanese Patent Laid-Open No. 2003-199023 JP-A-8-6784

The present invention has been made in view of these disadvantages, and it is possible to generate a redistributed copyrighted work file by a simple operation, greatly reducing the communication load at that time, and improving security. It is another object of the present invention to provide a copyrighted material redistribution promotion system that can significantly improve the convenience of redistribution while protecting the copyright.

The invention made to solve the above problems is
Using the attached information associated with copyrighted material data, the execution program, and the management server that can be connected to the client terminal via a communication network, while protecting the copyright, facilitate the redistribution of the copyrighted material A system,
The attached information has a data structure having an identification information portion including information on a copyrighted work and / or a distributor information portion including sequentially distributed client information,
The above execution program is
Attached information transmission step for transmitting the attached information in order to determine the validity of the copyrighted work in the management server,
This is a copyrighted work redistribution promotion system characterized in that the acquired client information is added to the attached information and updated, and each process of the redistributed work creation step for encrypting the work data is executed. is there.

The copyrighted material distribution promotion system can very easily generate a copyrighted material file for redistribution from the copyrighted material data acquired at the client terminal by using the attached information of the copyrighted material data and the execution program. At this time, the management server configured to be connectable to the client terminal via the network judges the validity of the copyrighted work data. Therefore, the copyrighted work can be obtained by sequentially distributing the copyrighted work data by a plurality of client terminals. Security can be ensured even in the case of distribution. In that case, the attached information used to determine the legitimacy of the copyrighted work is not only the identification information section of the copyrighted work information, but also the distributor information such as the client information of all who have distributed the copyrighted work file in sequence. Therefore, the security in judging the validity of a copyrighted work is remarkably excellent. Furthermore, since the data size of the attached information can be reduced, the communication load required for generating the copyrighted work file for rejuvenation determination and redistribution can be greatly reduced. In addition, since the attached information is transmitted and recorded from the client terminal to the management server, the management server can easily manage the distribution and distribution status of the copyrighted work. Therefore, it is possible to collect the purchase price without fail, and to distribute the copyright fee to the copyright holder. In addition, it is possible to distribute the distribution of the copyrighted work to the distributor as a result of the recording in the distributor information section of the attached information.

Thus, according to the copyrighted material redistribution promotion system, the convenience of redistribution is greatly improved, so that the redistribution of the copyrighted work can be promoted. In addition, this makes it possible to sequentially distribute the copyrighted work via a plurality of client terminals while ensuring the protection of the copyright, thereby promoting the distribution of the copyrighted work. In this way, according to the work redistribution promotion system, both copyright protection and promotion of the distribution of works can be realized.

In the work redistribution promoting system, the execution program may be configured to further execute a readable work generating step for making work data viewable. According to this work redistribution promotion system, a redistribution work file can be viewed at the same time that the work can be viewed on a client terminal that has obtained encrypted data of a work such as a redistribution work file. Can be generated. Thereby, the convenience of redistribution of a work can be further improved and redistribution can be promoted.

In the copyrighted work redistribution promotion system, the data structure of the attached information further includes a succession information part relating to the distribution status of the copyrighted work and / or a data information part relating to the copyrighted work data in order to determine whether or not the management server has tampered. It is good to have. According to the copyrighted material redistribution promotion system, it is possible not only to check the identification information part and distributor information part in the judgment of the validity of the copyrighted work, but also to check whether the attached information or copyrighted data has been tampered with. Security is further improved and copyright protection can be enhanced. In addition, by including information on the cumulative number of distributions of copyrighted works by client terminals as inheritance information, when the cumulative distribution number reaches a specified value, distribution after that can be restricted. It is also possible to prevent the system from being used for multi-sales called.

In the copyrighted material redistribution promotion system, the execution program may be achieved by a browser add-on or plug-in stored in the client terminal. According to the copyrighted material redistribution promotion system, each step of the execution program can be performed by a browser add-on or plug-in of the client terminal. Therefore, when the redistribution to other clients is performed, the execution program No longer need to be distributed. Thereby, since redistribution becomes simpler, the convenience of redistribution can be further improved, and redistribution can be further promoted.

In the above-mentioned copyrighted material redistribution promotion system, the data size of the attached information is preferably 12 kilobytes or less. By transmitting such ancillary information with a small data size from the client terminal to the management server, the validity of the copyrighted work and the generation of a redistributed copyrighted work file can be suppressed to a very small communication load. The convenience of redistribution of the work can be further improved, and the redistribution of the work can be further promoted.

Therefore, the client terminal, the management server, and the communication network configured to connect these client terminals and the management server are used and associated with copyrighted work data that facilitates the redistribution of the copyrighted work while protecting the copyright. An electronic file containing attached information and an execution program,
The attached information has a data structure having an identification information portion including information on a copyrighted work and / or a distributor information portion including sequentially distributed client information,
The above execution program is
Attached information transmission step for transmitting the attached information in order to determine the validity of the copyrighted work in the management server,
An electronic file for copyrighted work distribution is characterized in that the acquired client information is added to the attached information and updated, and each process of the redistributed copyrighted work generation step for encrypting the copyrighted work data is executed. By using the attached information and the execution program, it is possible to easily generate a redistribution work electronic file from the work distribution electronic file at the client terminal, greatly increasing the communication load at that time. Can be reduced and security can be improved. According to the electronic file for literary work distribution, the convenience of redistribution of the literary work can be improved, and redistribution can be promoted.

Here, the “literary work” is a creative expression of thought or feeling, belongs to the range of literary arts, academics, art or music, and requires copyright protection. For example, music, video, various publications (electronic books such as magazines and novels, comics, application forms, paid manuals, pamphlets, etc.) can be mentioned. The “client” refers to a person who acquires or acquires a copyrighted work file.

As described above, according to the copyrighted work redistribution promoting system and the copyrighted work electronic file of the present invention, the redistributed copyrighted work file can be generated by a simple operation, and the communication load at that time is greatly increased. Can be reduced and security can be improved. As a result, the convenience of redistribution can be remarkably improved and the redistribution of the copyrighted work is facilitated, so that the distribution of the copyrighted work can be promoted while protecting the copyright.

It is a schematic block diagram which shows the literary work redistribution promotion system which concerns on one Embodiment of this invention. It is a figure which shows the data structure of the attached information which concerns on the literary work redistribution promotion system of FIG. It is a figure which shows the data structure of the execution program which concerns on the literary work redistribution promotion system of FIG. 2 is a flowchart showing a procedure for performing communication between a client terminal and a management server in the copyrighted work redistribution promoting system of FIG. 1. It is a figure which shows the data structure of the attached information which concerns on the produced | generated work file for redistribution in the work redistribution promotion system of FIG. It is a schematic block diagram which shows the work redistribution promotion system which concerns on a different form from the work redistribution promotion system of FIG. It is a figure which shows the data structure of the attached information which concerns on the literary work redistribution promotion system of FIG. It is a figure which shows the data structure of the execution program which concerns on the literary work redistribution promotion system of FIG. 7 is a flowchart showing a procedure for performing communication between a client terminal and a management server in the copyrighted work redistribution promotion system of FIG. 6. It is a figure which shows the data structure of the attached information which concerns on the produced | generated work file for redistribution in the work redistribution promotion system of FIG.

In the copyrighted material redistribution promotion system of the present invention, the electronic file for distributing the copyrighted work is first acquired by the primary client terminal, and a redistributed copyrighted work file is generated at the terminal, which is the secondary client terminal. Then, it is distributed by sequentially repeating the distribution in the same manner from other client terminals.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. First, a case where the primary client acquires a work distribution file and generates a redistribution work file will be described.

The work redistribution promotion system 1 in FIG. 1 has work data 2, attached information 3, an execution program 4, a primary client terminal 5, a network 7, and a management server 8. There may be a plurality of primary client terminals, but FIG. 1 will be described with only one for avoiding complexity.

It is assumed that the literary work distribution electronic file acquired by the primary client terminal 5 includes literary work data 2, attached information 3, and an execution program 4. The attached information 3 is associated with the copyrighted work data 2 by a link or the like. In addition, since the execution program 4 is included, even a client terminal that does not have a browser having an add-in or plug-in acquires the electronic file for distributing the copyrighted work, views the copyrighted work, and redistributes it. It is possible to easily generate a copyrighted work file.

The acquisition of the electronic file for distributing the copyrighted work by the primary client terminal 5 can be performed by various methods. For example, it may be acquired at a store or the like, or downloaded from the management server 8 through the network 7 by the primary client terminal 5, or an e-mail attached with a work distribution file from the management server 8 is primary. It can also be received by the client terminal 5. In addition, when the information is acquired at a store or the like, various electronic recording media for storing the electronic file for distributing the copyrighted work can be used. In general, for example, a USB memory, an SD memory, a CD-R, a DVD-R, and the like can be given.

The auxiliary information 3 and the execution program 4 acquired by the primary client terminal 5 and included in the electronic file for copyrighted work distribution stored in the disk drive (not shown) are stored in the storage unit 6 of the primary client terminal 5. The explanation is based on the assumption that the data has been moved and saved. The place where the literary work data 2, the attached information 3 and the execution program 4 are stored or stored is not particularly limited, and may be stored in the storage unit 6 independently, or may be stored in the primary client terminal 5. It may be stored in a reading device such as a disk drive built in or connected to an electronic storage medium such as a USB memory.

Work data 2 is electronic data of a work. The data format of the copyrighted work electronic data is not particularly limited, and is appropriately selected depending on the kind of the copyrighted work, the operation system used by the client terminal, the application for viewing the copyrighted work on the client terminal, and the like. In general, PDF (Portable Document Format), JPEG (Joint Photographic Experts Group), MPEG (Moving Picture Experts Group), GIF (Graphic InterHMP). Text Format), MP3 (MPEG-1 Audio Layer-3), etc. are used. Regardless of the type of operation system used by the client terminal, PDF can be viewed from the viewpoint that the electronic data of the copyrighted work can be viewed and the size of the file can be reduced, making it easier to distribute the copyrighted work file for redistribution. Is preferred. In this embodiment, the literary work data 2 acquired by the primary client terminal 5 is plain text, but may be encrypted.

Supplied information 3 includes various information related to the copyrighted work file. The attached information 3 is also electronic data. The format of electronic data is not particularly limited. When the format of the copyrighted work data 2 is PDF, the attached information 3 can be embedded in the copyrighted work data 2.

FIG. 2 is a diagram showing the data structure of the attached information 3. The attached information 3 has an identification information part 13 and a distributor information part 14.

The identification information section 13 includes information on a copyrighted work, such as a serial number of the copyrighted work. Since the attached information 3 has the identification information section 13, it is possible to confirm the information of the literary work in the determination of the validity of the literary work file, and to ensure security.

The distributor information section 14 includes information (ID information) of the copyright owner who provided the copyrighted work and the client who has sequentially distributed the redistributed copyrighted work file. The client information (ID information) is a number, a character, a symbol, or the like assigned to each client, or a combination thereof. As shown in FIG. 2, in the copyrighted work distribution file acquired by the primary client, the distributor information section 14 includes only copyright holder information.

The data size of the copyright holder information and each client information constituting the identification information section 13 and the distributor information section 14 included in the attached information 3 is not particularly limited, but is 128 bytes or less, that is, The data size is preferably 1 packet or less. By making each piece of information have such a data size, the client terminal 5 transmits / receives information necessary for judging the legitimacy of the copyrighted work in the management server 8 with a reduced communication load and at a low cost. can do. By doing so, the convenience of redistribution of the copyrighted work is further enhanced, the redistribution is promoted, and further distribution of the copyrighted work can be promoted.

The execution program 4 is for causing the primary client terminal 5 to execute each process. FIG. 3 is a diagram showing the data structure of the execution program 4. The execution program 4 has an attached information transmission step 15 and a redistribution work creation step 16. *

In the attached information transmission step 15, in order to determine the validity of the copyrighted work file acquired by the primary client terminal 5 in the management server 8, the attached information 3 of the copyrighted work is sent to the primary client terminal 5 to the management server 8. Send to. By including this step, it is possible to easily determine the validity of the literary work data 2. In the attached information transmission step 15, the attached information 3 can be transmitted after waiting for an operation by the primary client. For example, the primary client terminal 5 has obtained a copyright distribution file. In this case, it is possible to automatically start communication with the management server 8 and automatically transmit the attached information 3. In this way, the convenience of redistributing the copyrighted work can be greatly improved.

In the redistribution work creation step 16, the primary client terminal 5 is updated by adding the primary client information (ID information) in the distributor information section 14 of the auxiliary information 3 stored in the storage section 6. At the same time, the copyrighted work data 2 is encrypted. In this way, a redistribution work file composed of the encrypted data of the work, the updated attached information 3 and the execution program 4 is generated. By including this step, a redistribution file can be generated very easily, and the convenience of redistribution of copyrighted work is greatly improved. Further, since client information is further added as the attached information 3, the security in judging the validity of the redistributed work file is improved, and the copyright can be protected.

The primary client terminal 5 has attached information transmission means 9 and redistribution work generation means 10. The primary client terminal 5 is systematically provided with a control unit including a CPU and the like, a ROM, a RAM, a hard disk, a monitor, an input button, and the like. The attached information transmitting means 9 and the redistributed work generating means 10 are controlled by the control unit (primary client terminal 5) based on the attached information transmitting step 15 and the redistributed work generating step 16 of the execution program 4, respectively. (Not shown) is configured to function by controlling each unit. The primary client terminal 5 is not particularly limited as long as it can be operated by the execution program 4, and examples thereof include a mobile phone, a mobile terminal, and a personal computer.

The network 7 is typically the Internet. As a transmission medium of the network 7, various media such as Ethernet (registered trademark), a wired medium such as an optical fiber or a telephone line, or a wireless medium can be used. The network 7 may be directly connected to the primary client terminal 5 and the management server 8, or may be connected via a mobile communication network server (not shown).

The management server 8 has a validity judgment unit 11 and an attached information update unit 12.

The legitimacy determining means 11 determines whether or not the copyrighted work distribution file acquired by the primary client terminal 5 is genuine, the attached information 3 transmitted from the primary client terminal 5, and the management server Attached information recorded in FIG. 8 is collated, and if both contents match, a validity confirmation notice is transmitted to the primary client terminal 5.

The attached information update unit 12 adds and updates the information (ID information) of the primary client that acquired the copyrighted work distribution file to the attached information recorded in the management server 8. By including such an attached information update means 12, it is possible to determine the validity of the copyrighted work distribution files that are distributed sequentially. In addition, the attached information recorded and updated in the management server 8 makes it possible to easily manage the copyrighted work and grasp the distribution status.

The management server 8 is systematically configured by a computer including a control unit including a CPU, a ROM, a RAM, a hard disk, a monitor, a keyboard, and the like. The validity judgment unit 11 and the attached information update unit 12 are configured to function by a control unit (not shown) controlling each unit based on a computer program stored in a ROM, a hard disk or the like of the management server 8. ing.

Hereinafter, the operation of the copyrighted work redistribution promotion system 1 will be described with reference to FIG.

First, the primary client terminal 5 makes a communication request to the management server 8 and establishes communication between them. Here, the communication between the primary client terminal 5 and the management server 8 may be performed by plain text communication, or may be performed by encrypted communication for ensuring security. As a method of encrypted communication, SSL (Secure Socket Layer) or TLS (Transport Layer Security) is preferably used. In the SSL communication, the auxiliary information 3 is transmitted after being encrypted with a common key or the like, and is decrypted with the common key or the like after being received. In the communication, an encrypted communication method other than SSL may be used.

In the copyrighted work redistribution promotion system 1, the method of communicating between the primary client terminal 5 and the management server 8 is not limited to the method of directly transmitting and receiving information connected via a network. For example, a communication method for exchanging the attached information 3 or the validity confirmation notification as an attached file of an e-mail may be used.

Next, the primary client terminal 5 reads the auxiliary information 3 stored in the storage unit 6 and transmits it to the management server 8 by the process of the auxiliary information transmission step 15.

The management server 8 verifies the attached information with respect to the received attached information 3 by the validity judgment means 11. That is, it is determined whether or not the content of the attached information recorded in the management server 8 matches the content of the attached information 3 of the received copyrighted work file. Judge that the copyrighted work file is valid. As the auxiliary information 3 used for the collation, both the identification information part 13 and the distributor information part 14 are preferably adopted from the viewpoint of improving the security in the validity judgment, but only the identification information part 13 is used. Alternatively, only the distributor information unit 14 may be used.

After the validity determination, the management server 8 transmits a validity confirmation notification to the primary client terminal 5.

The primary client terminal 5 receives the validity confirmation notice, and then, in the redistribution work generation step 16, the primary client terminal 5 stores the primary client stored in the primary client terminal 5 in the attached information 3 of the work. Information (ID information) is added and updated, and the copyrighted work data 2 is encrypted. As a result, a secondary client distribution file including the encrypted data of the copyrighted work, the updated attached information 3 and the execution program 4 is generated. In the generated distribution file, the configuration of the attached information 3 includes copyright holder information and primary client information as the distributor information section 14 as well as the identification information section 13 as shown in FIG. Yes. In addition to the above method, the above-mentioned attachment information 3 is updated by transmitting the attachment information updated in the management server 8 to the primary client terminal 5 and replacing it with the attachment information 3 stored in the storage unit 6. May be.

In the above, the method of encrypting the copyrighted work data is not particularly limited, and any method generally used for encrypting electronic data can be used. Either a public key encryption method or a common key encryption method may be used. As such a method, for example, AES (Advanced Encryption System), DES (Data Encryption Standard), Triple DES (Data Encryption Standard), RSA (Rivest-EmerdEmerdEmerdEmerdEmerdEmerdEmerdEmerdMentErDentEdEdEmEdEdEmEdEmEdEdEmEdEmEdEmEdEdEmEdEdEmEdEmEdEmEdEmEdEmEdEmEdEmEdEmEdEmEdEmEdEmEdEmEdEmEdEmEdEmEdS Data Encipherment Algorithm), RC (Rivest Cipher or Ron's Code), and the like.

Also, as a method for encrypting copyrighted work data, a commonly used encryption method can be used. For example, encryption may be performed by the processing of the redistribution work generation step 16 of the execution program 4, or encryption may be performed using an encryption key transmitted from the management server 8 together with a validity confirmation notification. It may be a method.

Finally, a communication end request is made from the primary client terminal 5 to the management server 8, and the communication between the two ends.

The secondary client distribution file generated in this way can be distributed from the primary client terminal 5 to other client terminals. The distribution method is not particularly limited. For example, the communication may be performed by infrared communication or Bluetooth (registered trademark) between client terminals, or via an electronic recording medium such as a USB or SD memory. Further, it may be performed by attaching to an electronic mail transmitted / received between client terminals.

In the redistributed work file, the execution program 4 is written in the JavaScript (registered trademark) language included in the PDF file when the work data 2 and the attached information 3 are electronic data in PDF format. Therefore, it is preferably embedded in the PDF file. Even when the copyrighted work data 2 and the attached information 3 are in other formats, it is preferable to embed the execution program 4 therein. By doing so, the operability of the copyrighted work file can be improved and the convenience of redistribution can be greatly improved.

According to the copyrighted work redistribution promotion system 1, a redistributed copyrighted work file can be easily generated. Further, the communication load between the primary client terminal 5 and the management server 8 at that time can be greatly reduced, and the security can be improved. As a result, the convenience of redistribution of the copyrighted work is greatly improved, and redistribution can be promoted. According to such a literary work redistribution promotion system 1, it is possible to promote the distribution of literary works while protecting the copyright.

Further, according to the electronic file for distributing the copyrighted work including the copyrighted work data 2 having the above characteristics, the attached information 3 and the execution program 4, the primary client terminal 5 from which the copyrighted work is distributed has the redistributed copyrighted work. An electronic file can be easily generated. Further, the communication load at that time can be greatly reduced, and the security can be improved. This greatly improves the convenience of redistribution of the copyrighted work, so that the redistribution of the copyrighted work can be promoted.

Subsequently, a work redistribution promoting system 17 according to a form different from that in FIG. 1 will be described with reference to FIG.

Here, a redistribution work file (herein referred to as “n-th client distribution file”) is distributed to the n-th client terminal by being distributed directly from the primary client terminal 5 or sequentially via one or more client terminals. A case where 21 (n is a natural number of 2 or more) is acquired will be described.

The work redistribution promotion system 17 in FIG. 6 includes work encrypted data 18, attached information 19, an execution program 20, an n-order client terminal 21, a network 7, and a management server 23. Yes. In the following description, the same components as those in the copyrighted work redistribution promoting system 1 in FIG. In the literary work redistribution promoting system 17, there are a plurality of client orders n, and there may be a plurality of n-order client terminals 21. However, in FIG. 6, the description will be limited to one n-th client terminal 21 in order to avoid complexity.

In addition, the redistributed work file includes encrypted data 18 of the work and attached information 19. The attached information 19 is moved and stored in the storage unit 22 of the n-th client terminal 21. It shall be. Further, it is assumed that the execution program 20 is set to be achieved by a browser add-in or plug-in installed in the n-th client terminal 21 and stored in the storage unit 22. The place where the encrypted data 18 of the copyrighted work and the attached information 19 are stored or stored is not particularly limited, and may be stored independently in the storage unit 22 or in the n-th client terminal 21. It may be stored in an electronic storage medium such as a built-in or connected disk drive reader or USB memory. The execution program 20 does not have to be achieved by a browser add-in or plug-in, and the execution program 20 is included in the redistributed copyrighted work file and can be used.

The work encrypted data 18 is obtained by encrypting the work data. A method for encrypting the copyrighted work data to generate the encrypted data 18 is not particularly limited, and a method generally used for encrypting the electronic data described above can be used.

FIG. 7 is a diagram showing a data structure of the attached information 19. The attached information 19 includes an identification information unit 13, a distributor information unit 28, an inheritance information unit 29, and a data information unit 30.

The distributor information section 28 includes the copyright owner of the copyrighted work and client information (ID information) obtained by sequentially distributing the copyrighted work distribution file, that is, the primary client information to the (n-1) th order client information. It is. Since the attached information 19 has such a distributor information part 28, the justification determination of the copyrighted work file is not only the identification information part 13 but also information of all clients that have sequentially delivered the copyrighted work file. Since the contents of the person information section 28 can also be verified, security can be further improved and copyright protection can be ensured. Further, since the accessory information 19 having such a distributor information section 28 is transmitted from the n-th client terminal 21 to the management server 23 and recorded, the management server 23 can easily manage the distributor information. Part of the purchase price collected from the client who acquired the copyrighted work can be reliably distributed as a copyright fee to the copyright holder. In addition, for example, it is possible to distribute a part of the purchase price as a distribution reward to clients distributed in sequence. Thereby, each client can be given a strong incentive to distribute the copyrighted work, thereby further promoting the distribution of the copyrighted work.

The inheritance information section 29 includes information related to inheritance of the redistributed copyrighted work file by repeated distribution and acquisition. By having such inheritance information 29, it is possible to increase the number of items used for verification in the attached information 19 when judging the legitimacy of the copyrighted work file, so that the security in the legitimacy judgment becomes very high. Examples of the contents included in the inheritance information section 29 include client information (ID information) that has sequentially distributed the redistributed copyrighted work file, information about the inheritance order, and the like. In addition, by including the information, it is possible to check whether or not the distributor information section 28 included in the attached information 19 has been tampered with when determining the legitimacy of the copyrighted work file, thereby further improving security.

Furthermore, the contents included in the inheritance information unit 29 include a distribution number counter indicating information on the cumulative distribution number of the file by the client terminal. By having the counter, when the cumulative number of distributions reaches a set value, the file can be restricted. It can be prevented from being used. Further, the inheritance information unit 28 can include client grouping information and the like. By having such client grouping information, for example, a plurality of clients having common ID information can be registered as a group, and a redistribution work file obtained by one person in the group can be registered in the same group. Other client terminals can be set to be able to view freely.

The data information section 30 includes information related to electronic data of the copyrighted work. The data information section 30 is associated with the encrypted data 18 of the copyrighted work by a link or the like. Examples of the contents of the data information unit 30 include information on the data size of the literary work electronic data. By having such a data information unit 30, since it is possible to check whether or not the copyrighted work data has been tampered with when determining the legitimacy of the copyrighted work file, it is possible to further improve the security and protect the copyright. Can be secured.

Each data size of the inheritance information part 29 and the data information part 30 included in the attached information 19 is not particularly limited, but for the same reason as the above-described identification information part 13 or the like, 128 bytes or less, That is, the data size is preferably 1 packet or less.

In addition, the total data size of the attached information 19 is preferably 12 kilobytes or less. If it exceeds 12 kilobytes, the communication load when transmitting the associated information 19 from the n-th client terminal 21 to the management server 23 increases, and the convenience of redistribution of the copyrighted work may be reduced. The data size is more preferably 10 kilobytes or less, further preferably 8 kilobytes or less, and particularly preferably 6 kilobytes or less. The total data size of the attached information 19 is preferably 0.5 kilobytes or more. If it is less than 0.5 kilobytes, there is a risk that the information necessary for determining the legitimacy of the copyrighted work file in the attached information 19 will be insufficient and the security will be lowered. The data size is more preferably 1 kilobyte or more, further preferably 1.5 kilobytes or more, and particularly preferably 2 kilobytes or more. The data size of the auxiliary information 19 can be reduced by a file compression technique, and the communication load can be further reduced.

FIG. 8 is a diagram showing the data structure of the execution program 20. The execution program 20 includes an attached information transmission step 15, a readable work generation step 31, and a redistribution work generation step 16. These are achieved by a browser add-on or plug-in installed in the n-th client terminal 21 and stored in the storage unit 22.

The readable work creation step 31 decrypts the encrypted data 18 of the work obtained by the n-th client terminal 21 to generate a readable work. By including this step, the n-th client terminal 21 that has acquired the work encrypted data 18 can easily view the work after the justification determination.

The n-th client terminal 21 has an attached information transmitting unit 9, a readable work generating unit 25, and a redistributed work generating unit 10. As in the case of the primary client terminal 5, each unit is configured to function under the control of a control unit (not shown) based on each step of the execution program 20.

The management server 23 includes validity determination means 26, attached information update means 12, and accounting / distribution means 27. The management server 23 is connected to the distribution management database 24.

The legitimacy judging means 26 is transmitted by the process of the attached information sending means 9 of the n-th client terminal 21 in order to judge whether or not the copyrighted work file acquired by the n-th client terminal 21 is genuine. The attached information 19 and the attached information recorded in the management server 23 are collated, and the attached attached information 19 is analyzed to check whether the attached information 19 and the copyrighted work data are falsified. If it is determined in the collation that both contents match and that the falsification has not been made, a validity confirmation notification is transmitted to the n-th client terminal 21. *

The charging / distribution means 27 cooperates with the distribution management database 24 to collect the work purchase price from the n-th client who purchased the work based on the contents of the attached information of the work, and to the copyright holder. Distributes a portion of the price as a copyright fee. By having the billing / distribution means, it is possible to reliably collect the purchase price and distribute the copyright fee based on the distribution status of the copyrighted work managed by the management server 23.

Hereinafter, a procedure for viewing a copyrighted work and generating a redistributed copyrighted work file in the nth-order client terminal 21 that has acquired the copyrighted work file for distribution of the n-th client will be described with reference to FIG.

First, the n-th client terminal 21 makes a communication request to the management server 23 and establishes communication between them.

Subsequently, by the process of the attached information transmission step 15, the n-th client terminal 21 reads the attached information 19 stored in the storage unit 22 and transmits it to the management server 23. The management server 23 collates the received attached information 19 by the validity judgment means 26 and judges whether or not it has been tampered with. In the present embodiment, the attached information 19 to be collated is the identification information section 13, the distributor information section 28, the inheritance information section 29, and the data information section 30, but the information section used for collation is among them. It is also possible to select appropriately. Further, whether or not the attached information 19 is falsified is determined by analysis of the inheritance information unit 29, and whether or not the copyrighted work data is falsified is determined by analysis of the data information unit 30. The management server 23 determines that the attached information 19 transmitted from the n-th client terminal 21 matches the attached information recorded in the management server 23 and that the attached information 19 and the copyrighted work data are not falsified. In this case, it is determined that the copyrighted work file acquired by the n-th client terminal 21 is valid.

After the validity determination, the management server 23 transmits a validity confirmation notification to the n-th client terminal 21. In addition, the management server 23 transmits an instruction to the n-th client terminal 21 to increase the file cumulative distribution number counter included in the inheritance information unit 29 of the attached information 19 by one.

In the n-th client terminal 21, after receiving the validity confirmation notification, the readable work 18 generates a readable work by decrypting the encrypted data 18 in the readable work generation step 31.

Here, the decryption method of the encrypted data 18 of the copyrighted work is selected in accordance with the above-described method in which the copyrighted work data is encrypted when generating the copyrighted work file for distribution of the n-th client. The decryption method may be, for example, a decryption method in accordance with an instruction of the readable work generation step 31 of the execution program 20, and a decryption key transmitted from the management server 8 together with a validity confirmation notification. It is also possible to use the method for decoding.

Further, the n-th client terminal 21 adds and updates the n-th client information (ID information) to the attached information 19 by the process of the redistribution work generation step 16 and re-encrypts the encrypted data 18 of the work. Encryption is performed. The re-encryption encryption method is not particularly limited, and any method that is generally used can be used as in the case of encryption in the above-described copyrighted material redistribution promoting system 1. Further, as a method of re-encrypting the work encrypted data 18, the data of the readable work generated by the decryption may be encrypted in the same or different encryption format as the decryption, Data may be changed from the encrypted data 18 so that the key to be decrypted is different, and re-encrypted data may be generated.

In this way, a (n + 1) next client distribution file is generated which consists of re-encrypted data of the copyrighted work and updated attached information. As a result, the configuration of the attached information 19 in the (n + 1) th order client distribution file includes the client information from the first order to the nth order as the identification information section 13 and the distributor information section 28, as shown in FIG. An information unit 29 and a data information unit 30 are included. Further, the numerical value of the cumulative distribution number counter included in the inheritance information unit 29 is incremented by 1 according to an instruction from the management server 23. When the value of the counter reaches a specified value, it is possible to restrict the distribution of the redistribution file to other client terminals. In addition to the above method, for example, the attached information 19 is updated by transmitting the attached information updated in the management server 23 to the n-th client terminal 21 and replacing the attached information 19 stored in the storage unit 22. It may be done by.

In the management server 23, the charging / distribution means 27 performs the charging / distribution processing by instructing the distribution management database 24. That is, the purchase price of the copyrighted work is collected from the n-th client, and a part of the price is distributed to the copyright holder as a copyright fee. In addition to this, for example, the copyrighted work is distributed sequentially and distributed to all or a part of the primary to (n−1) -order clients recorded in the distributor information section 28 of the attached information 19. A part of the price may be distributed.

Finally, a communication end request is made from the n-th client terminal 21 to the management server 23, and communication between both ends.

The (n + 1) next-client distribution file generated in this way can be distributed from the n-th client terminal 21 to other client terminals.

According to the work redistribution promotion system 17, since the inheritance information section 29 and / or the data information section 30 is included as the attached information 19, it is determined whether the attached information 19 or the work data is falsified. It is possible to further improve the security in determining the validity of a copyrighted work. In addition, the client terminal that has acquired the redistribution work file in which the work data is encrypted can view the work very easily, and can further generate the redistribution work file. . As a result, the convenience of redistribution of the copyrighted work is further improved, and the redistribution of the copyrighted work can be further promoted. According to such a work redistribution promotion system 17, it becomes easy for a plurality of clients to sequentially distribute and distribute a work file while enhancing copyright protection. Therefore, both enhancement of copyright protection and further promotion of the distribution of copyrighted works can be realized.

In addition, according to the electronic file for distributing a copyrighted work having the above-described features, a plurality of clients can distribute the electronic file for copyrighted work distribution sequentially while further improving security and enhancing copyright protection. It becomes easy to distribute. Therefore, both enhancement of copyright protection and further promotion of the distribution of copyrighted works can be realized.

The copyrighted material redistribution promotion system of the present invention is not limited to the above embodiment, and for example, the execution program may further include a management step for managing the inheritance information part in the attached information. Specifically, the management step updates the inheritance information portion in the attached information when distributing and acquiring the redistribution work file. By including this step, management of the inheritance information part in the attached information is facilitated, and the copyright of the copyrighted work can be reliably protected.

As described above, the work redistribution promotion system and work distribution electronic file of the present invention can greatly improve the convenience of redistribution of work, so that the work can be protected while protecting the copyright. It is suitable for promoting the redistribution and promoting its distribution.

DESCRIPTION OF SYMBOLS 1 Work redistribution promotion system 2 Work data 3 Attached information 4 Execution program 5 Primary client terminal 6 Memory | storage part 7 Network 8 Management server 9 Attached information transmission means 10 Redistributed work generation means 11 Validity judgment means 12 Attachment Information update means 13 Identification information section 14 Distributor information section 15 Attached information transmission step 16 Redistribution work creation step 17 Work redistribution promotion system 18 Work encryption data 19 Attached information 20 Execution program 21 n-th client terminal 22 Storage unit 23 Management server 24 Distribution management database 25 Readable work generation means 26 Validity determination means 27 Charge / distribution means 28 Distributor information part 29 Inheritance information part 30 Data information part 31 Readable work generation step

Claims

Using the attached information associated with copyrighted material data, the execution program, and the management server that can be connected to the client terminal via a communication network, while protecting the copyright, facilitate the redistribution of the copyrighted material A system,
The attached information has a data structure having an identification information portion including information on a copyrighted work and / or a distributor information portion including sequentially distributed client information,
The above execution program is
Attached information transmission step for transmitting the attached information in order to determine the validity of the copyrighted work in the management server,
A work redistribution promotion system characterized in that the obtained client information is added to the attached information and updated, and each process of the redistribution work generation step for encrypting the work data is executed.
The work redistribution promotion system according to claim 1, wherein the execution program is configured to further execute a readable work generating step for making the work data viewable.
A work for determining whether the data structure of the attached information is a falsification of the inheritance information section on the distribution status of the work and / or whether the work data has been tampered with in order to determine whether the attached server has been tampered with in the management server The work redistribution promotion system according to claim 1, further comprising a data information section regarding data.
The work redistribution promotion system according to claim 1, wherein the execution program is achieved by a browser add-on or plug-in stored in a client terminal.
2. The work redistribution promotion system according to claim 1, wherein the data size of the attached information is 12 kilobytes or less.
Ancillary information associated with copyrighted material data that facilitates redistribution of copyrighted work while protecting copyrights using a client terminal, a management server, and a communication network configured to connect the client terminal and the management server. And an electronic file containing an execution program,
The attached information has a data structure having an identification information portion including information on a copyrighted work and / or a distributor information portion including sequentially distributed client information,
The above execution program is
Attached information transmission step for transmitting the attached information in order to determine the validity of the copyrighted work in the management server,
An electronic file for literary work distribution characterized in that the acquired client information is added to the attached information and updated, and each process of the redistribution literary work generation step for encrypting the literary work data is executed.