JP4694241B2 - Computer-readable recording medium storing content files - Google Patents

Description

  The present invention relates to a computer-readable recording medium storing a content file including content data and a restriction program for restricting reproduction of the content data.

  In recent years, a server for content distribution storing files related to content such as games, music, movies, and novels and a user terminal device of a user who uses the content are connected via an electric communication line such as the Internet, Online commerce is widely performed using a content distribution system in which a file related to the content in a content distribution server can be downloaded to a user terminal device.

  As such a content distribution system, for example, a system disclosed in Japanese Patent Application Laid-Open No. 2004-171377 has been proposed. This content distribution system includes a user terminal device that transmits an identification code of a content file, a user An authentication server that receives the identification code from the terminal device and authenticates the identification code, and a distribution server that stores the content file and transmits the content file to the user terminal device are connected via the Internet.

  The identification code of the content file is described on a card that is sold as appropriate, and the user knows the identification code by purchasing the card on which the identification code relating to the desired content is described. , Input to the user terminal device and transmitted to the authentication server.

  The authentication server includes a storage unit that associates and stores an identification code and data indicating whether or not the identification code is an authenticated code, and receives the identification code transmitted from the user terminal device Then, referring to the data stored in the storage unit, it is confirmed whether or not the received identification code is an authenticated code. If the received identification code is not authenticated, the identification code and the address of the user terminal device are sent to the distribution server. At the same time, the data stored in the storage unit is updated to change the identification code to an authenticated code. If the code has been authenticated, an error message is returned to the user terminal device.

  Upon receiving the identification code transmitted from the authentication server and the address of the user terminal device, the distribution server transmits a content file corresponding to the received identification code to the user terminal device based on the received address of the user terminal device. To do.

  According to the content distribution system configured as described above, whether or not the identification code is an authenticated code is managed by the authentication server, and the content file is transmitted from the distribution server to the user terminal only once per one identification code. Since it is transmitted to the device, it is possible to prevent the content from being illegally used by using the used identification code illegally obtained by the user.

  In addition, while such online commerce is performed, a conventional sales method of storing a file related to the content in a recording medium such as a CD-ROM and selling it at a store is also adopted, The user can use the content by purchasing the recording medium.

JP 2004-171377 A

  However, in the content file distributed by the content distribution system as described above or the content file stored in the recording medium, the content file is transmitted from the distribution server to the user terminal device and stored, or the recording medium is transmitted to the user. Once sold, the use of the content cannot be restricted, and the content file cannot be illegally copied, making it usable by a third party. there were.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a computer-readable recording medium storing a content file that can more reliably prevent unauthorized use of content.

To achieve the above object, the present invention provides:
A recording medium storing a content file consisting of content data and a program for regulating the reproduction of the content data, the regulation file including a first key required for the regulation,
Content files stored in the recording medium, content data configured Rutotomoni, the content file as read by the computer is constituted by being encrypted with the first key in the regulation program,
The restriction program generates terminal identification information based on unique information of the computer on the computer when the content file is opened at least for the first time on the computer , the generated terminal identification information, and the content file Processing for transmitting the file identification information for individually identifying the content file, connected to the content management server via an electric communication line, and transmitting the file identification information by the content management server. a second key forming a first key pair in regulating program content file identified by the third key containing the information on the basis of said terminal identification information is generated and transmitted, the Receiving the third key sent from the content management server, before the received third key Recognize information corresponding to the second key and terminal identification information, confirm whether the recognized second key is a key paired with the first key in the restriction program, and recognize the recognized terminal identification A process for confirming whether information matches the generated terminal identification information, a recognized second key is a key paired with the first key, and the recognized terminal identification information is the generated terminal A computer-readable record storing a content file, wherein the content data is decrypted and reproduced by the second key when it matches the identification information. Related to the medium.

According to the present invention, the recording medium storing the content file composed of the restriction program and the content data encrypted by the first key in the restriction program is sold at the store and purchased by the user. When a content file stored in the storage medium is read out by a computer used by the user, a management system for content stored in a recording medium is created by the computer and a content management server connected to the computer via a telecommunication line. Built.

  The content data refers to information / data such as characters, sounds, and images, computer programs, and the like, and is music data, movies, novels, etc., game software, and the like. Further, as described above, the restriction program is for restricting the reproduction of content data, and includes a first key necessary for the restriction.

  In addition, in the case of playback, when music is converted into data, the sound of the music is output to a computer speaker, and when the movie is converted into data, the movie is displayed on a computer display device. Is displayed on the display device, and if it is a game software, the game software can be used on a computer. It means to be in a state.

  Further, the content data does not include a reproduction program for reproducing the content data, and includes a reproduction program even if the content data is configured to be reproduced by an appropriate reproduction program stored in advance on the computer side, The computer may be configured to be played back by the playback program.

The content file read by the computer, first, the control programs are executed, in accordance with the regulatory programs, specific information of the computer, for example, the terminal identification information based such as CPU number or a hard disk number generated Rutotomoni The generated terminal identification information and file identification information that is preset for the content file and for individually identifying the content file are transmitted to the content management server.

The terminal identification information and the file identification information transmitted from the computer are received by the content management server, and the received terminal identification information and the second key paired with the first key (the content file specified by the file identification information). A third key including these pieces of information is generated based on a second key paired with the first key in the restriction program . Then, the generated third key is returned from the content management server to the computer that transmitted the terminal identification information. The third key may be generated when a certain condition set for each file identification information is satisfied.

  The third key returned from the content management server is received by the computer in accordance with the restriction program, and the information corresponding to the second key and the terminal identification information is recognized from the received third key, respectively. It is confirmed whether or not the key is a key that is paired with the first key in the restriction program, and whether or not the recognized terminal identification information matches the generated terminal identification information. The

If the recognized second key is a key paired with the first key, and the recognized terminal identification information matches the generated terminal identification information, the content data of the content file is stored in the first file . A process of decoding and reproducing with the two keys is performed, and the content data is reproduced on the computer.

  Thus, according to the present invention, the second key in the third key transmitted from the content management server is paired with the first key in the content file restriction program, and the terminal in the third key. Unless the identification information matches the terminal identification information of the computer, reproduction of the content data in the content file is restricted by the restriction program, the content file is illegally copied, and the information related to the third key is Even if it is known, since the terminal identification information differs from computer to computer, the regulation by the regulation program cannot be released. Thereby, unauthorized use of content can be effectively prevented.

In addition, since the content data in the content file is encrypted, unauthorized use of the content can be more effectively prevented. Furthermore, since the first key and the second key that is paired with the first key can be changed for each content data, it is possible to prevent the misuse of the third key among the content data (content files), and to ensure illegal content. Use can be prevented.

  In the above-described regulation program, it is necessary that the computer and the content management server be configured to be connectable via an electric communication line in order to reproduce the content data. In order to cope with a case where the content management server is not configured to be connectable via the network, the regulation program may be configured to perform the processing described below instead of the above processing. good.

That is, when a content file is read by a computer and a restriction program is executed, first, terminal identification information based on the unique information of the computer is generated, and the generated terminal identification information and the file identification information are stored in the computer. The screen is displayed on the screen, the terminal identification information and the file identification information displayed are notified to the content manager, and the second key paired with the first key (the restriction of the content file specified by the file identification information) A second key that is paired with the first key in the program) and the terminal identification information, and a third key including such information is obtained from the content manager and stored in the computer. A screen prompting you to enter is displayed.

The user who sees such a display screen notifies the content manager of the displayed terminal identification information using a communication means such as a telephone (including a telephone configured to automatically answer) or a fax. The content manager generates a third key based on the terminal identification information transmitted from the user and notifies the user of the third key. The third key may be generated when a certain condition set for each file identification information is satisfied, as described above.

  Thereafter, when the user inputs the third key notified from the content manager to the computer, the input third key is accepted according to the restriction program, and the second key input from the input third key to the second key is similar to the above. The information corresponding to the key and the terminal identification information is recognized, and it is confirmed whether or not the recognized second key is a key paired with the first key in the restriction program, and the recognized terminal It is confirmed whether the identification information matches the generated terminal identification information.

If the recognized second key is a key paired with the first key, and the recognized terminal identification information matches the generated terminal identification information, the content data of the content file is stored in the first file . A process of decoding and reproducing with the two keys is performed. Thus, even if the restriction program is configured in this way, the same effect as described above can be obtained.

Here, the file identification information, for example, information notified to the user in advance or information displayed on the display label attached to the recording medium in which the content file is stored may be input and transmitted by the user. The contents contained in the content file are transmitted or displayed on the screen.

Also, the regulation program may be configured differently depending on the first key is the content data.

Also, the regulation program first is configured to perform a process of checking whether a first execution, when it is the first time, in addition to the respective processing, the generated terminal identification information When the process of storing in the storage unit of the computer is further performed and it is not the first time, the terminal identification information is generated again, and the regenerated terminal identification information is stored in the storage unit of the computer It may be configured to perform processing for confirming whether or not they match and processing for reproducing the content data when it is determined that they match.

  For example, if the restriction program is configured to be executed only when the content file is opened for the first time, there will be no restriction after the restriction program is executed once and the restriction by the restriction program is released. Since the content can be used without any problem, the content file may be illegally copied and used.

  Therefore, if the terminal identification information is confirmed at the second and subsequent executions, even if the content file is copied, if the terminal identification information is different, the content data in the content file cannot be reproduced. , Unauthorized use of content can be prevented more reliably. Also, at the second and subsequent executions, no data is exchanged between the computer and the content management server, and no information is exchanged between the user and the content manager. can do. Whether or not the restriction program is executed for the first time can be determined, for example, based on whether or not the terminal identification information is stored in an appropriate storage unit of the computer.

  As described above, the computer-readable recording medium storing the content file according to the present invention can prevent unauthorized use of the content more reliably.

  Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. 1 is an explanatory diagram showing content files stored in a CD-ROM according to an embodiment of the present invention, and FIG. 2 shows content files stored in a CD-ROM according to the present embodiment. It is the block diagram which showed schematic structure of the content management system constructed | assembled based on.

  As shown in FIG. 1, a CD-ROM (computer-readable recording medium) 1 of this example is a content data and a program for regulating the reproduction of the content data, and a first key necessary for the regulation Is stored in the storage case of the CD-ROM 1, and the content file (CD-ROM1) preset for the content file (CD-ROM1) is stored in the storage case of the CD-ROM1. Is attached with a display label displaying a product ID (file identification information) for individually identifying the files.

  The content file stored in the CD-ROM 1 is read by the user terminal device 4 including a computer having a CPU, ROM, RAM, hard disk, CD-ROM drive, and the like, and is appropriately stored in the storage unit. When the content file stored in the storage unit is read out by the user terminal device 4, the user terminal device 4 and the content management server 3 are connected to each other via the Internet 5 as shown in FIG. A content management system 2 configured as described above is constructed.

  The content data is information or data such as text, audio, video (novels, essays, music, movies, photos, paintings, designs, etc.) or computer programs such as game software. It does not include a playback program for playback, and is configured to be played back by an appropriate playback program stored in advance on the user terminal device 4 side, or includes a playback program, and playback is performed on the user terminal device 4 side by this playback program It is configured to be.

  The restriction program encrypts the content data with the first key, and includes a different first key depending on the content data. The restriction program is configured to perform the following processing when the content file is opened on the user terminal device 4.

  That is, the restriction program is first set as one of the operations on the user terminal device 4 to determine whether or not there is a preset key input (forcing the restriction release process not to be performed forcibly). A process for confirming whether there is a predetermined key input is performed, and if there is, a process for reproducing the content data is performed. On the other hand, when there is no key input, first, a process for confirming whether or not it is the first execution is performed. If it is the first time, unique information of the user terminal device 4 such as a CPU number or An ID number (terminal ID (terminal identification information)) based on a hard disk number or the like is generated, a product ID input to the user terminal device 4 by a user is received, and the generated terminal ID and the received product ID are stored as contents. Processing to be transmitted to the management server 3 and a third key to be described later transmitted from the content management server 3, and recognize information corresponding to a second key to be described later and a terminal ID from the received third key, respectively; It is confirmed whether the recognized second key is a key that is paired with the first key in the restriction program, and the recognized terminal ID is the previous one. A process for confirming whether or not the generated terminal ID matches, the recognized second key is a key paired with the first key, and the recognized terminal ID matches the generated terminal ID The content data is decrypted by the second key and played back, and the generated terminal ID is stored in the storage unit of the user terminal device 4. When it is determined that the terminal ID is generated again, and the process of checking whether the regenerated terminal ID matches the terminal ID stored in the storage unit of the user terminal device 4 or not And processing for reproducing the content data.

  The CD-ROM 1 stores a plurality of different contents data and one that stores the same contents data and is sold at a store. The user terminal device 4 is used. A user who stores desired content data is appropriately purchased by a user.

  Further, the content file is generated by a file generation device 20 as shown in FIG. 3, and the file generation device 20 includes a data storage unit 21 for storing the content data, and a data storage unit 21. A restriction program is added to the content data stored in the file, and the content data is encrypted with the first key in the restriction program to generate the content file, and the first key paired with the first key in the restriction program A file generation unit 22 that performs processing for generating two keys, a file storage unit 23 that stores a content file generated by the file generation unit 22, and a key storage unit that stores a second key generated by the file generation unit 22 24. Then, the content file stored in the file storage unit 23 is stored in the CD-ROM 1 by an apparatus (not shown) as appropriate.

  The content management server 3 is a computer having a CPU, ROM, RAM, hard disk and the like, similar to the user terminal device 4, and includes a key storage unit 11, a management information storage unit 12, a transmission / reception control unit 13, and a key generation unit 14. And a communication interface 15 and the like, and is connected to the Internet 5 via the communication interface 15.

  As shown in FIG. 4, the key storage unit 11 includes a content file name, a product ID, and a second key stored in the key storage unit 24. The content file is specified by the product ID. A first key in the program and a second key that makes a pair are stored in association with each other.

  As shown in FIG. 5, the management information storage unit 12 stores a content file name, a product ID, and management information for each product ID in association with each other. The number and period of generation of a third key, which will be described later, and the generation result of the third key are mentioned.

  Upon receiving the terminal ID and product ID transmitted from the user terminal device 4, the transmission / reception control unit 13 transmits the received terminal ID and product ID to the key generation unit 14 and is transmitted from the key generation unit 14. When the third key is received, a process of transmitting the received third key to the user terminal device 4 is performed.

  When the key generation unit 14 receives the terminal ID and the product ID transferred from the transmission / reception control unit 13, the key generation unit 14 refers to the data stored in the management information storage unit 12 based on the received product ID, and sets the product ID. Processing to confirm whether or not a certain condition is satisfied based on the corresponding management information, and when the certain condition is satisfied (if the third key generation result has not reached the number of times the third key can be generated) And the second key associated with the product ID by referring to the data stored in the key storage unit 11 based on the received product ID. , The process of generating the third key including the information based on the recognized second key and the received terminal ID, and the received product I stored in the management information storage unit 12 It performs a process of updating the generation performance of the third key corresponding, and a process of transmitting the third key generated in the transmission and reception control unit 13 in.

  According to the CD-ROM 1 of the present example configured as described above, a CD-ROM 1 storing a content file including desired content data is purchased by a user at a store and stored in the CD-ROM 1. The content file is stored in the appropriate storage unit of the user terminal device 4 used by the user.

  When the content file stored in the storage unit of the user terminal device 4 is opened as appropriate, the content management system 2 is constructed by the user terminal device 4 and the content management server 3, as shown in FIGS. 6 and 7. After the restriction program (authentication process) is executed, the content data is reproduced.

  That is, when a content file is opened, a restriction program is executed (step S1). This restriction program first determines whether or not there is a preset key input (in order not to forcibly perform restriction release processing). (Step S2) to confirm whether or not there is a predetermined key input set in advance as one of the operations of (1), and if not, whether or not the regulation program is executed for the first time is determined. A confirmation process is performed (step S3). Whether or not the restriction program is executed for the first time is determined by whether or not there is restriction release data generated and stored in step S16, which will be described later. If there is such deregulation data, it is determined that it is not the first time. On the other hand, if it is step S2, the process proceeds to step S17.

  If it is determined in step S3 that it is the first time, a terminal ID based on the unique information (CPU number, hard disk number, etc.) of the user terminal device 4 is generated, and the CD-ROM 1 input to the user terminal device 4 by the user The product ID displayed on the display label attached to the storage case is received, and the generated terminal ID and the received product ID are transmitted to the content management server 3 (step S4).

  The terminal ID and product ID transmitted from the user terminal device 4 are received by the transmission / reception control unit 13 of the content management server 3 and transferred to the key generation unit 14 (step S5). The key generation unit 14 first transfers Based on the product ID, the data in the management information storage unit 12 is referred to, and it is confirmed whether or not a certain condition is satisfied based on the management information corresponding to the product ID (step S6).

  If it is determined in step S6 that a certain condition is satisfied (when the third key generation result has not reached the number of times the third key can be generated and within the period during which the third key can be generated). Then, referring to the data in the key storage unit 11 based on the transferred product ID, the second key associated with the product ID is recognized (step S7), the recognized second key and the transferred terminal ID A third key including these pieces of information is generated based on (Step S8).

  Next, the generation result of the third key corresponding to the transferred product ID in the management information storage unit 12 is updated, and the generated third key is transmitted to the transmission / reception control unit 13 to perform the transmission / reception control. The part 13 is made to return to the user terminal device 4 (step S9). On the other hand, if it is determined in step S6 that the predetermined condition is not satisfied, an error message is generated and transmitted to the transmission / reception control unit 13 and returned to the user terminal device 4 under the control of the transmission / reception control unit 13 (step S10). .

  The third key or error message returned by the transmission / reception control unit 13 is received by the user terminal device 4 in accordance with the restriction program (step S11). The restriction program first receives the third key and error message. Is confirmed (step S12), and if it is an error message, it is displayed on the display device of the user terminal device 4 (step S13).

  On the other hand, if it is determined in step S12 that the key is the third key, information corresponding to the second key and the terminal ID is recognized from the received third key, and the recognized second key is included in the restriction program. Processing for confirming whether or not the key is paired with the first key is performed (step S14). If it is determined that the key is paired, the recognized terminal ID is further generated in step S4. A process of confirming whether or not the terminal ID matches is performed (step S15).

  If it is determined in step S15 that they match, the restriction release data including the second key and the terminal ID is generated and stored in the storage unit of the user terminal device 4 as appropriate, and the storage unit storing the restriction release data Is added to the restriction release data (step S16), and the process proceeds to step S17.

  On the other hand, if it is determined in step S3 that it is not the first time, a process for confirming the content of the restriction release data generated and stored in step S16 is performed (step S18), and a process for determining whether the content is correct (step S18). Step S19). Specifically, the terminal ID based on the unique information of the user terminal device 4 is generated again, and it is confirmed whether or not the regenerated terminal ID matches the terminal ID of the deregulation data, and the deregulation is performed. It is confirmed whether or not the address of the storage unit storing the data matches the storage address of the deregulation data. Note that the user terminal device 4 must be connected to the content management server 3 via the Internet 5 at the first execution, but the user terminal device 4 is connected to the content management server 3 at the second and subsequent executions. It does n’t have to be.

  In step S19, when the regenerated terminal ID matches the terminal ID of the deregulation data, and the address of the storage unit storing the deregulation data matches the storage address of the deregulation data Then, the process proceeds to step S17, and in this step S17, an appropriate reproduction program stored in advance on the user terminal device 4 side or an appropriate reproduction program in the content file is executed to reproduce the content data.

  Note that the reproduction means that the music sound is output to the speaker of the user terminal device 4 and the music sound is output to the speaker of the user terminal device 4. If the movie is displayed on the display device 4 and the novel is converted into data, the text of the novel is displayed on the display device, and if it is game software, the game software Is made available on the user terminal device 4.

  On the other hand, if it is determined in step S14 that the recognized second key is not a key paired with the first key in the restriction program, in step S15, the recognized terminal ID is identical to the terminal ID generated in step S4. If it is determined that it has not, the regenerated terminal ID does not match the terminal ID of the deregulation data in step S19, or the address of the storage unit storing the deregulation data is stored in the deregulation data. If it does not match the address, the process proceeds to step S20 to generate a message for requesting release of the restriction by the restriction program and display it on the display device of the user terminal device 4.

  As described above in detail, according to the CD-ROM 1 storing the content file in this example, the second key in the third key transmitted from the content management server 3 is the first in the content file restriction program. As long as the terminal ID in the third key is not matched with the terminal ID of the user terminal device 4, reproduction of the content data in the content file is restricted by the restriction program. Even if the file is illegally copied and the information related to the third key is known, since the terminal ID is different for each user terminal device 4, the restriction by the restriction program cannot be released. Thereby, unauthorized use of content can be effectively prevented.

  Further, since the first key in the restriction program is changed for each content data, the second key paired with the first key can be changed for each content data, and the third key between the content data (content files) can be changed. It is possible to prevent unauthorized use of content more reliably by preventing the diversion of keys.

  In addition, since the content data of the content file is encrypted with the first key in the restriction program and the content data is decrypted with the second key in the third key, unauthorized use of the content is more effective. Can be prevented.

  In addition, when the content file is opened, the restriction program is executed, and the number of executions is confirmed. When the number of executions is the second or later, the terminal ID is regenerated and matched with the terminal ID of the restriction release data. And whether or not the address of the storage unit in which the deregulation data is stored matches the storage address of the deregulation data, so that unauthorized use of content can be prevented more reliably. Can do.

  This is because when the content file is copied and stored in a different user terminal device 4, the address of the storage unit storing the terminal ID and the deregulation data will be different. This is because it can be effectively prevented. For example, if the restriction program is configured to be executed only when the content file is opened for the first time, after the restriction program is executed once and the restriction by the restriction program is released, Since the content can be used without restriction, such inconvenience can be eliminated.

  In addition, since the data is not transmitted and received between the user terminal device 4 and the content management server 3 during the second and subsequent executions, the restriction by the restriction program can be efficiently released.

  Further, when a predetermined key input (predetermined key input for preventing the restriction release processing from being forcibly performed) is performed on the user terminal device 4 by the user, between the user terminal device 4 and the content management server 3 Since the restriction is released without sending / receiving data, it is convenient when an error or the like occurs and the normal restriction release process (steps S3 to S20) cannot be executed. It is.

  In addition, the key generation unit 14 of the content management server 3 generates the third key only when it satisfies a certain condition with reference to the management information stored in the management information storage unit 12 based on the product ID. Therefore, the use of the user can be finely restricted for each product ID or content file (content data), and unauthorized use of the content can be more effectively prevented.

  As mentioned above, although one Embodiment of this invention was described, the specific aspect which this invention can take is not limited to this at all.

  In the above example, the restriction program is configured to transmit the product ID to the content management server 3. However, the restriction program is not limited to this, and content identification information for identifying content data is transmitted to the content management server 3. It may be configured to transmit. The content identification information is, for example, information notified to the user in advance or displayed on a display label attached to the storage case of the CD-ROM 1 by the user, along with the generated terminal ID. What is transmitted from the user terminal device 4 to the content management server 3 or included in the content file is automatically transmitted from the user terminal device 4 to the content management server 3 together with the generated terminal ID.

  In this case, the key storage unit 11 includes content identification information, a content file name, and a second key paired with the first key in the restriction program corresponding to the content data specified by the content identification information. The management information storage unit 12 stores content identification information, a content file name, and management information for each content identification information in association with each other, and the key generation unit 14 stores user information. Based on the content identification information transmitted from the device 4, the second key stored in the key storage unit 11 and the management information stored in the management information storage unit 12 are recognized.

  In addition, in the regulation program of the above example, in order to reproduce content data, the user terminal device 4 and the content management server 3 need to be configured to be connectable via the Internet 5, but the computer used by the user In order to deal with the case where the server is not configured to be connectable to the content management server 3 via the Internet 5, the regulation program is replaced with the processing shown in FIGS. 6 and 7, as shown in FIG. It may be configured to perform various processes.

  That is, when the content file is opened on the computer and the restriction program is executed (step S31), the restriction program first receives a predetermined key input for preventing the restriction release processing from being forcibly performed. A process for confirming whether or not there has been is performed (step S32), and if there is not, a process for confirming whether or not the regulation program has been executed for the first time is performed (step S33). Whether or not the restriction program is executed for the first time is determined by whether or not there is restriction release data generated and stored in step S38 to be described later. On the other hand, if it is step S32, the process proceeds to step S39.

  If it is determined in step S33 that it is the first time, a terminal ID is generated based on the unique information of the computer, and the generated terminal ID and the third key input screen are displayed on the computer display device (step S34). ). At this time, on the display device of the computer, in addition, the displayed terminal ID and the product ID displayed on the display label attached to the storage case of the CD-ROM 1 are notified to the content manager. A message prompting the user and a message prompting the user to input the third key are displayed on the screen.

  Then, the user who views such a display screen manages the displayed terminal ID and product ID using a communication means such as a telephone (including a telephone configured to automatically answer) or a fax. When the user is contacted, the content manager generates a third key based on the terminal ID and product ID transmitted from the user and notifies the user. On the content manager side, for example, based on information obtained from the user, the operator causes the key generation device to appropriately execute the processes shown in steps S5 to S10 in the content management server 3 described above. Thus, the third key is generated.

  Thereafter, when the user inputs the third key notified from the content manager side to the computer, the input third key is accepted according to the restriction program (step S35), and the restriction program is input first. A process of recognizing information corresponding to the second key and the terminal ID from the third key, and confirming whether or not the recognized second key is a key paired with the first key in the restriction program. If it is determined that the key is a pairing key (step S36), a process for confirming whether or not the recognized terminal ID matches the terminal ID generated in step S34 is performed (step S37). ).

  When it is determined in step S37 that they match, the deregulation data including the second key and the terminal ID is generated and stored in the appropriate storage unit of the computer, and the address of the storage unit storing the deregulation data ( A process of adding (storage address) to the restriction release data is performed (step S38), and the process proceeds to step S39.

  On the other hand, if it is determined in step S33 that it is not the first time, a process for confirming the content of the restriction release data generated and stored in step S38 is performed (step S40), and a process for determining whether the content is correct (step S40). Step S41). Specifically, the terminal ID based on the unique information of the computer is generated again, it is confirmed whether the regenerated terminal ID matches the terminal ID of the restriction release data, and the restriction release data is stored. It is checked whether the stored address of the storage unit matches the storage address of the restriction release data.

  In step S41, when the regenerated terminal ID matches the terminal ID of the deregulation data, and the address of the storage unit storing the deregulation data matches the storage address of the deregulation data Then, the process proceeds to step S39. In step S39, a process for reproducing the content data by appropriately executing a reproduction program is performed.

  On the other hand, if it is determined in step S36 that the recognized second key is not a key paired with the first key in the restriction program, in step S37, the recognized terminal ID matches the terminal ID generated in step S34. If it is determined that it has not, the regenerated terminal ID does not match the terminal ID of the deregulation data in step S41, or the address of the storage unit storing the deregulation data is stored in the deregulation data. If it does not match the address, the process proceeds to step S42 to generate a message requesting the cancellation of the restriction by the restriction program and display it on the display device of the computer.

  Thus, even if the restriction program is configured in this way, the same effect as described above can be obtained. As described above, in step S34, the terminal ID is displayed, but in addition to this, content identification information, file identification information, and the like included in the content file are displayed together with the terminal ID so that the user can The terminal ID and content identification information or file identification information can be notified to the content manager side. Then, on the content manager side, the third key is generated based on the notified terminal ID and content identification information or file identification.

  In addition, when the content is game software or the like, content data called a trial version that allows the user to use the content for a small amount of time may be created in order for the user to understand what the game is. In such a case, you must prepare the trial version content data and the content data as the regular version that is not the trial version, but combine the trial version content data and the regular version content data into one content file. When the restriction release process is executed by the restriction program, if the contents of the regular version can be used, it becomes efficient, for example, data can be shared between the trial version and the regular version. . For example, when the user pays an appropriate usage fee, the management information stored in the management information storage unit 12 is changed so that the third key can be generated, so that the restriction by the restriction program is released, and the regular version Can be executed on the user terminal device 4.

  In the above example, the content file is stored in the CD-ROM 1 as a recording medium. However, the recording medium is not limited to the CD-ROM 1.

It is explanatory drawing which shows the content file stored in CD-ROM which concerns on one Embodiment of this invention. 1 is a block diagram showing a schematic configuration of a content management system constructed based on content files stored in a CD-ROM according to the present embodiment. It is the block diagram which showed schematic structure of the file production | generation apparatus concerning this embodiment. It is explanatory drawing which showed the data structure of the data stored in the key memory | storage part which concerns on this embodiment. It is explanatory drawing which showed the data structure of the data stored in the management information storage part which concerns on this embodiment. It is a flowchart for demonstrating the regulation cancellation | release process which concerns on this embodiment. It is a flowchart for demonstrating the regulation cancellation | release process which concerns on this embodiment. It is a flowchart for demonstrating the regulation cancellation | release process which concerns on other embodiment of this invention.

1 CD-ROM
DESCRIPTION OF SYMBOLS 2 Content delivery system 3 Content management server 4 User terminal device 5 Internet 11 Management side key memory | storage part 12 Management information memory | storage part 13 Transmission / reception control part 14 Key generation part 20 File generation apparatus 21 Data storage part 22 File generation part 23 File storage part 24 Key storage

Claims (6)

A recording medium storing a content file consisting of content data and a program for regulating the reproduction of the content data, the regulation file including a first key required for the regulation,
Content files stored in the recording medium, content data configured Rutotomoni, the content file as read by the computer is constituted by being encrypted with the first key in the regulation program,
The restriction program generates terminal identification information based on unique information of the computer on the computer when the content file is opened at least for the first time on the computer , the generated terminal identification information, and the content file Processing for transmitting the file identification information for individually identifying the content file, connected to the content management server via an electric communication line, and transmitting the file identification information by the content management server. a second key forming a first key pair in regulating program content file identified by the third key containing the information on the basis of said terminal identification information is generated and transmitted, the Receiving the third key sent from the content management server, before the received third key Recognize information corresponding to the second key and terminal identification information, confirm whether the recognized second key is a key paired with the first key in the restriction program, and recognize the recognized terminal identification A process for confirming whether information matches the generated terminal identification information, a recognized second key is a key paired with the first key, and the recognized terminal identification information is the generated terminal A computer-readable record storing a content file, wherein the content data is decrypted and reproduced by the second key when it matches the identification information. Medium. When the third key is generated and transmitted by the content management server when the content management server satisfies a certain condition set for each file identification information, the restriction program is transmitted from the content management server. 3 keys are received, information corresponding to the second key and terminal identification information is recognized from the received third key, and the recognized second key is paired with the first key in the restriction program 2. The apparatus according to claim 1, wherein a process for confirming whether the recognized terminal identification information matches the generated terminal identification information is performed. the computer-readable recording medium storing a content file. A recording medium storing a content file consisting of content data and a program for regulating the reproduction of the content data, the regulation file including a first key required for the regulation,
Content files stored in the recording medium, content data configured Rutotomoni, the content file as read by the computer is constituted by being encrypted with the first key in the regulation program,
The restriction program generates terminal identification information based on unique information of the computer on the computer when the content file is opened at least for the first time on the computer , the generated terminal identification information, and the content file File identification information for individually identifying the content file is displayed on the screen on the computer, and the displayed terminal identification information and the file identification information are notified to the content manager. Te, a second key forming a first key pair in regulating program content file identified by the file identification information, said a key generated based on the terminal identification information, the information Get the third key that contains it from the content manager and enter it into the computer When the third key is input, the information corresponding to the second key and the terminal identification information is recognized from the input third key, and the recognized second key Confirming whether or not the key is paired with the first key in the restriction program and confirming whether or not the recognized terminal identification information matches the generated terminal identification information; When the second key is a key paired with the first key and the recognized terminal identification information matches the generated terminal identification information, the content data is decrypted and reproduced by the second key. A computer-readable recording medium storing a content file, wherein the content file is stored. The restriction program generates terminal identification information based on unique information of the computer, displays the generated terminal identification information and the file identification information on the computer, and displays the displayed terminal identification information and the file identification. Information is sent to the content manager, and the third key generated when a certain condition set for each file identification information is satisfied is obtained from the content manager and input to the computer. 4. The computer-readable recording medium storing a content file according to claim 3, wherein processing for displaying a screen prompting the user is performed . The computer-readable recording medium storing a content file according to any one of claims 1 to 4 , wherein the restriction program is configured such that a first key thereof differs according to the content data. . The restriction program is configured to perform a process for confirming whether or not it is the first execution, and when it is the first time, in addition to the processes, the generated terminal identification information is stored in the computer. If the process is further stored in the storage unit and it is not the first time, the terminal identification information is generated again, and the regenerated terminal identification information matches the terminal identification information stored in the storage unit of the computer. a process for confirming whether or dolphin not, if it is determined that they match, the any one of claims 1 to 5, wherein the composed configured to perform a process for reproducing the content data A computer-readable recording medium storing a content file.

Images