WO2017017823A1 - Procédé d'enregistrement d'informations, dispositif et procédé de reproduction, dispositif et procédé d'enregistrement, programme informatique, et support d'enregistrement - Google Patents

Procédé d'enregistrement d'informations, dispositif et procédé de reproduction, dispositif et procédé d'enregistrement, programme informatique, et support d'enregistrement Download PDF

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Publication number
WO2017017823A1
WO2017017823A1 PCT/JP2015/071551 JP2015071551W WO2017017823A1 WO 2017017823 A1 WO2017017823 A1 WO 2017017823A1 JP 2015071551 W JP2015071551 W JP 2015071551W WO 2017017823 A1 WO2017017823 A1 WO 2017017823A1
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WIPO (PCT)
Prior art keywords
recording medium
content
information
portable recording
encryption key
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2015/071551
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English (en)
Japanese (ja)
Inventor
弘平 鈴木
光弘 和田
龍彦 小野
晴康 坂田
佐々木　儀央
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pioneer Corp
Pioneer Digital Design and Manufacturing Corp
Original Assignee
Pioneer Corp
Pioneer Digital Design and Manufacturing Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Pioneer Corp, Pioneer Digital Design and Manufacturing Corp filed Critical Pioneer Corp
Priority to PCT/JP2015/071551 priority Critical patent/WO2017017823A1/fr
Priority to CN201580081929.4A priority patent/CN107851447B/zh
Priority to JP2017530552A priority patent/JP6441482B2/ja
Publication of WO2017017823A1 publication Critical patent/WO2017017823A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers

Definitions

  • the present invention relates to a technical field of an information recording method, a reproducing apparatus and method, a recording apparatus and method, a computer program, and a recording medium for recording information on a portable recording medium with a reproduction apparatus and the number of reproduction being limited.
  • CPRM Content Protection for Recordable Media
  • MKB Media Key Block
  • MediaID Media ID
  • the encrypted information is recorded on the recording medium after the information is encrypted using the device key of the CPRM-compatible device in addition to the MKB and MediaID.
  • Information encrypted by the CPRM method can only be played back by CPRM compatible devices.
  • CPRM is a technique for restricting copying of information recorded on one recording medium to another device or another recording medium, and thus the number of reproductions of the one recording medium is not limited.
  • CPRM when recording secret information on a recording medium and disclosing it only to a specific person, CPRM can repeatedly reproduce the recording medium, and thus the secret information may be leaked to a third party. That is, it is extremely difficult for the side disclosing the secret information to manage the reproduction of the recording medium.
  • the present invention has been made in view of the above problems, for example, and provides an information recording method, a reproducing apparatus and method, a recording apparatus and method, a computer program, and a recording medium that can restrict the reproduction of a portable recording medium. This is the issue.
  • a first information recording method of the present invention is an information recording method in a system including a first device having a storage unit and a second device different from the first device in order to solve the above-described problem,
  • the first device records the encryption key information unique to the portable recording medium on a portable recording medium, and stores the encryption key information in the storage unit; and the second device comprises: A second recording step of encrypting content information using the encryption key information recorded on the portable recording medium and recording the encrypted content information on the portable recording medium; and an encryption stored in the storage unit by the first device.
  • a second information recording method of the present invention is an information recording method in a system including a first device having a storage unit and a second device different from the first device in order to solve the above-described problem,
  • the second device encrypts the content information using the encryption key information recorded on the portable recording medium and records it on the portable recording medium, and then stores the encryption key information recorded on the portable recording medium.
  • the content reproduction apparatus of the present invention records encryption key information unique to the portable recording medium in a storage unit and a portable recording medium, and also stores the encryption key information in the storage unit.
  • a recording control unit for storing content information encrypted using the encryption key information recorded on the portable recording medium by an external content recording device, and the encryption key information stored in the storage unit
  • a playback control unit for decoding and playing back.
  • the content playback method of the present invention is a content playback method in a content playback device having a storage unit, and the content playback device is unique to the portable recording medium and to the portable recording medium.
  • a recording control step of recording the encryption key information and storing the encryption key information in the storage unit, and the content reproduction device recorded on the portable recording medium by an external content recording device And a playback control step of decrypting and playing back the content information encrypted by using the encryption key information stored in the storage unit.
  • the content recording apparatus of the present invention encrypts content information using an encryption key information unique to the portable recording medium recorded on the portable recording medium by an external content reproduction apparatus. And a recording unit that records the information on the portable recording medium and an erasing unit that erases the encrypted information recorded on the portable recording medium from the portable recording medium.
  • the content recording method of the present invention is a content recording method in a content recording device, wherein the content recording device is recorded on a portable recording medium by an external content playback device.
  • a first computer program of the present invention provides a computer mounted in a content reproduction apparatus having a storage unit on a portable recording medium, and encryption key information unique to the portable recording medium.
  • a recording control unit that records the encryption key information in the storage unit, and content information encrypted using the encryption key information recorded on the portable recording medium by an external content recording device, It functions as a playback control unit that decrypts and plays back using the encryption key information stored in the storage unit.
  • the first recording medium of the present invention stores the first computer program of the present invention in order to solve the above problems.
  • a second computer program allows a computer installed in a content recording apparatus to be specific to the portable recording medium recorded on the portable recording medium by an external content reproduction apparatus.
  • a recording unit that encrypts content information using the encryption key information and records the content information on the portable recording medium; and an erasing unit that erases the encrypted information recorded on the portable recording medium from the portable recording medium; To function as.
  • the second recording medium of the present invention stores the second computer program of the present invention in order to solve the above problems.
  • Embodiments related to the information recording method of the present invention will be described.
  • a first information recording method is an information recording method in a system including a content reproduction device having a storage unit and a content recording device.
  • the information recording method includes a first recording step, a second recording step, and a reproducing step.
  • the “content reproduction device” and the “content recording device” according to the present embodiment are examples of the “first device” and the “second device” according to the present invention, respectively. The same applies to the following.
  • the content reproduction apparatus records the encryption key information unique to the recording medium on a portable recording medium, and stores the encryption key information in the storage unit of the content reproduction apparatus.
  • the encryption key information is generated by the content reproduction device.
  • the content recording apparatus encrypts the content information using the encryption key information recorded on the portable recording medium and records the encrypted information on the portable recording medium.
  • the content reproduction device decrypts and reproduces the content information recorded on the portable recording medium using the encryption key information stored in the storage unit of the content reproduction device.
  • the content recorded on the one portable recording medium after being encrypted using the encryption key information Information can be reproduced only by the one content reproduction apparatus. Therefore, according to the first information recording method of the embodiment, it is possible to limit the reproduction of the portable recording medium.
  • the content recording apparatus erases the encryption key information recorded on the portable recording medium from the portable recording medium in the second recording step.
  • the content information encrypted using the encryption key information recorded on the portable recording medium is recorded on the portable recording medium, the content information is encrypted from the portable recording medium by unauthorized means. It is possible to prevent the key information from being acquired.
  • the timing at which the encryption key information is deleted is not limited to after the content information is recorded on the portable recording medium. For example, after the content recording apparatus encrypts the content information, the content recording apparatus acquires the encryption key information. And so on.
  • the content playback apparatus erases the encryption key information stored in the storage unit of the content playback apparatus in the playback process.
  • the content reproduction apparatus does not have the encryption key information unique to the one portable recording medium. Cannot be reproduced. That is, according to this aspect, it is possible to limit not only the content playback apparatus that can play back one portable recording medium, but also the number of playbacks of the one portable recording medium.
  • the encryption key information is typically erased after the reproduction of the content information is completed. However, when the encryption key information is temporarily stored in a volatile memory such as a RAM (Random Access Memory), for example.
  • the encryption key information stored in the storage unit may be deleted before the reproduction of the content information ends.
  • the content reproduction apparatus in the first recording step, further records identification information unique to the portable recording medium on the portable recording medium.
  • the encryption key information unique to the portable recording medium and the identification information are associated with each other and stored in the storage unit of the content reproduction apparatus.
  • the content reproduction apparatus when the content reproduction apparatus reproduces the portable recording medium in the reproduction process, it is possible to identify the encryption key information unique to the portable recording medium relatively easily, which is very practical. It is advantageous.
  • the content recording apparatus further records frequency information indicating the number of times the content information can be reproduced on the portable recording medium in the second recording step.
  • the second information recording method is a content reproducing apparatus having a storage unit and an information recording method in a system including the content recording apparatus.
  • the information recording method includes a recording process and a reproducing process.
  • the content recording apparatus encrypts the content information using the encryption key information recorded on the portable recording medium, records the encrypted information on the portable recording medium, and then records the information on the portable recording medium.
  • the encryption key information is erased from the portable recording medium.
  • the content reproduction device decrypts and reproduces the content information recorded on the portable recording medium using the encryption key information stored in the storage unit.
  • the encryption key information recorded on the portable recording medium (that is, the encryption key information unique to the portable recording medium) is stored in the content reproduction device. May be generated by other devices. That is, in the second information recording method, the encryption key information generated by the other device may be recorded on the portable recording medium and stored in the storage unit of the content reproduction device.
  • the content playback apparatus includes a storage unit such as a hard disk and a nonvolatile memory, a recording control unit, and a playback control unit.
  • a recording control unit including a memory, a processor, and the like records encryption key information unique to the portable recording medium on a portable recording medium, and stores the encryption key information in a storage unit.
  • a playback control unit including a memory, a processor, and the like stores content information encrypted using encryption key information recorded on a portable recording medium by an external content recording device different from the content playback device. Decrypted using the encryption key information stored in the unit and reproduced.
  • the reproduction of the portable recording medium can be restricted as in the information recording method according to the above-described embodiment.
  • the content reproduction method according to the embodiment is a content reproduction method in a content reproduction apparatus having a storage unit.
  • the content reproduction method includes a recording control step and a reproduction control step.
  • the content reproduction apparatus records the encryption key information unique to the portable recording medium on the portable recording medium and stores the encryption key information in the storage unit.
  • the content playback device stores content information encrypted using encryption key information recorded on a portable recording medium by an external content recording device different from the content playback device in the storage unit. Decrypted using the encrypted key information and reproduced.
  • the reproduction of the portable recording medium can be restricted as in the case of the content reproduction device according to the above-described embodiment.
  • the content recording apparatus includes a recording unit and an erasing unit.
  • a recording unit including a memory, a processor, and the like uses encryption key information unique to the portable recording medium recorded on the portable recording medium by an external content reproduction apparatus different from the content recording apparatus.
  • the content information is encrypted and recorded on the portable recording medium.
  • an erasing unit including a memory, a processor, etc. erases the encryption information recorded on the portable recording medium from the portable recording medium.
  • the encryption key information used when the content information is encrypted is erased from the portable recording medium. Therefore, the content information recorded on the portable recording medium is It cannot be played back by a device other than the content playback device that records the encryption key information on the portable recording medium. Therefore, according to the content recording apparatus according to the present embodiment, the reproduction of the portable recording medium can be restricted as in the information recording method according to the above-described embodiment.
  • the content recording method according to the embodiment is a content recording method in a content recording apparatus.
  • the content recording method includes a recording process and an erasing process.
  • the content recording apparatus uses the encryption key information unique to the portable recording medium recorded on the portable recording medium by an external content reproduction apparatus different from the content recording apparatus to It is encrypted and recorded on the portable recording medium.
  • the content recording device erases the encrypted information recorded on the portable recording medium from the portable recording medium.
  • the content recording method it is possible to limit the reproduction of the portable recording medium, similarly to the content recording device according to the above-described embodiment.
  • a first computer program records a computer mounted on a content reproduction apparatus having a storage unit on a portable recording medium, encryption key information unique to the portable recording medium, and stores the encryption key information in the storage unit.
  • Content information encrypted using the encryption key information recorded on the portable recording medium by the recording control unit for storing the encryption key information and an external content recording device different from the content reproduction device is stored in the storage unit
  • a playback control unit that decrypts and plays back using the encrypted key information.
  • the content reproduction device According to the first computer program according to the embodiment, if the computer program is read and executed by a computer provided in the content reproduction device, the content reproduction device according to the above-described embodiment can be realized relatively easily. can do.
  • the second computer program according to the embodiment is specific to a portable recording medium recorded on a portable recording medium by an external content reproduction apparatus different from the content recording apparatus.
  • the content recording device According to the second computer program according to the embodiment, if the computer program is read and executed by a computer provided in the content recording device, the content recording device according to the above-described embodiment can be realized relatively easily. can do.
  • the first recording medium stores the first computer program according to the above-described embodiment.
  • the first computer program is read from a first recording medium such as a CD-ROM (Compact Disc Only Memory), DVD-ROM (DVD Read Only Memory), etc., and loaded into a computer mounted on the content playback device.
  • a first recording medium such as a CD-ROM (Compact Disc Only Memory), DVD-ROM (DVD Read Only Memory), etc.
  • the second recording medium according to the embodiment stores the second computer program according to the above-described embodiment.
  • the content recording apparatus when the second computer program is read from a second recording medium such as a CD-ROM or DVD-ROM into a computer mounted on the content recording apparatus and executed, the content recording apparatus according to the above-described embodiment is performed. Can be realized relatively easily.
  • FIG. 1 is a conceptual diagram of a system according to an embodiment.
  • FIG. 2 is a block diagram illustrating a configuration of each of the content reproduction apparatus and the content recording apparatus according to the embodiment.
  • a system 1 includes a content recording device 10 and a content reproduction device 20.
  • the content recording device 10 is a device handled by a data manager who manages important data such as secret information.
  • the content reproduction apparatus 20 is an apparatus used for browsing a part of important data managed by the data manager.
  • the “content reproduction device 20” and the “content recording device 10” according to the embodiment are examples of the “first device” and the “second device” according to the present invention, respectively.
  • the content recording apparatus 10 includes a controller 11, a recording / playback unit 12, a nonvolatile memory 13, a pickup 14, a pickup control unit 15, a disk motor 16, a disk motor control unit 17, an operation unit 18, and a display unit. 19.
  • the content playback apparatus 20 includes a controller 21, a recording / playback unit 22, a nonvolatile memory 23, a pickup 24, a pickup control unit 25, a disk motor 26, a disk motor control unit 27, an operation unit 28, and a display unit. 29.
  • a user who wants to browse a part of important data managed by the data manager handles the content playback device 20, and the data manager uses the content recording device 10 to browse the user.
  • An example of recording desired data on a disc is given below.
  • step S101 After the user sets the disc 50 as an example of the “portable recording medium” according to the present invention in the content playback device 20, the controller 21 of the content playback device 20 It is determined whether or not the disc is recordable (step S101).
  • step S101: No the controller 21 ends the process. At this time, the controller 21 may display, for example, a message indicating that the disc cannot be recorded on the display unit 29. It should be noted that various known modes can be applied to the method for determining whether or not the disc is recordable, and therefore, detailed description thereof is omitted.
  • step S101 If it is determined that the disc 50 is a recordable disc (step S101: Yes), the controller 21 generates an ID unique to the disc 50 (step S102) and also a key (that is, an encryption key) unique to the disc 50. ) Is generated (step S103).
  • the “ID” and “Key” according to the present embodiment are examples of “identification information” and “encryption key information” according to the present invention.
  • the controller 21 associates the generated ID with the key and stores them in the nonvolatile memory 23 (step S104).
  • the controller 21 controls each of the recording / reproducing unit 22, the pickup control unit 25, and the disk motor control unit 27 so as to record the generated ID and key on the disk 50 (step S104). S105).
  • the ID and the key are typically recorded in a predetermined location on the disc 50.
  • information indicating the location where the ID and the key are recorded is separately recorded on the disc 50. May be recorded at an arbitrary location on the disc 50.
  • the data manager who has received the disc 50 on which the unique ID and key are recorded by the above-described processing uses the content recording device 10 to record data that the user desires to browse on the disc 50.
  • the controller 11 of the content recording apparatus 10 first determines whether or not the set disc 50 is a disc in which an ID and a key unique to the disc 50 are recorded (step S201). Whether or not the unique ID and key are recorded on the disc 50 may be determined, for example, by determining whether or not the ID and key are recorded at a predetermined location on the disc 50.
  • step S201: No the controller 11 ends the process. At this time, the controller 11 may display, for example, a message indicating that the disk is inappropriate on the display unit 19.
  • step S201 When it is determined that the unique ID and key are recorded on the disc 50 (step S201: Yes), the controller 11 determines whether the disc 50 is a recordable disc (step S202). When it is determined that the disk 50 is not a recordable disk (step S202: No), the controller 11 ends the process. At this time, the controller 11 may display, for example, a message indicating that the disc cannot be recorded on the display unit 19.
  • step S202 When it is determined that the disc 50 is a recordable disc (step S202: Yes), the controller 11 controls the recording / reproducing unit 12, the pickup control unit 15, and the disc motor control unit 27 to record on the disc 50. Read the Key that has been set. Subsequently, the controller 11 encrypts data as an example of “content information” according to the present invention, which is instructed by the data manager via the operation unit 18, using the read key. Then, the controller 11 controls each of the recording / reproducing unit 12, the pickup control unit 15, and the disc motor control unit 17 so as to record the encrypted data on the disc 50 (step S203).
  • step S204 determines whether or not the data recording is completed. If it is determined that the data recording has not ended (step S204: No), the controller 11 executes the process of step S203 again.
  • step S204 the controller 11 records / reproduces the pickup 12, the pickup controller 15 and the disk motor so as to erase the key recorded on the disk 50.
  • Each control unit 17 is controlled (step S205).
  • the disc 50 is a “Rewritable” disc
  • the key recorded on the disc 50 may be erased by the “Erase” process.
  • the disc 50 is a “Write Once” disc
  • the key recorded on the disc 50 may be erased by the “overwrite” process.
  • the user who has received the disc 50 on which data is recorded by the above-described processing reproduces the data recorded on the disc 50 using the content reproduction device 20.
  • the controller 21 of the content reproduction apparatus 20 first determines whether or not the set disc 50 is a recorded disc (that is, not blank) and a unique ID is recorded on the disc 50. Is determined (step S301).
  • step S301 When it is determined that the recording has not been performed or the unique ID is not recorded on the disc 50 (step S301: No), the controller 21 performs a predetermined “Eject” process (step S308), and ends the process. .
  • step S301 When a unique ID is recorded on the disc 50 and it is determined that the disc 50 is a recorded disc (step S301: Yes), the controller 21 corresponds to the unique ID recorded on the disc 50. It is determined whether the key to be stored is stored in the nonvolatile memory 23 (step S302).
  • Step S302 When it is determined that the key corresponding to the unique ID recorded on the disk 50 is not stored in the nonvolatile memory 23 (step S302: No), the controller 21 performs a predetermined “Eject” process ( Step S308), the process is terminated.
  • step S302 When it is determined that the key corresponding to the unique ID recorded on the disk 50 is stored in the nonvolatile memory 23 (step S302: Yes), the controller 21 stores the key stored in the nonvolatile memory 23. Based on the Key corresponding to the unique ID recorded on the disk 50, it is determined whether or not the data recorded on the disk 50 can be decrypted (that is, the decryption is canceled) (step S303). It should be noted that various known aspects can be applied to the method for determining whether or not data can be decrypted, and therefore, detailed description thereof is omitted.
  • step S303 When it is determined that the data recorded on the disk 50 cannot be decrypted (step S303: No), the controller 21 performs a predetermined “Eject” process (step S308) and ends the process.
  • step S303 If it is determined that the data recorded on the disk 50 can be decrypted (step S303: Yes), the controller 21 controls each of the recording / playback unit 22, the pickup control unit 25, and the disk motor control unit 27.
  • the data recorded on the disk 50 is read out, and the read data is decrypted by using the Key stored in the nonvolatile memory 23 and corresponding to the unique ID recorded on the disk 50. For example, it is displayed on the display unit 29 (step S304).
  • step S305 determines whether or not reading of data from the disk 50 is completed.
  • step S305: No the controller 21 executes the process of step S304 again.
  • step S305: Yes the controller 21 determines whether or not “Eject Command” has been received via the operation unit 28 (step S306).
  • step S306: No the controller 21 temporarily enters a standby state, and executes the process of step S306 again after a predetermined time.
  • step S306 If it is determined that “Eject Command” has been received (step S306: Yes), the controller 21 erases the ID and Key unique to the disk 50 stored in the nonvolatile memory 23 (step S307). In parallel with the process of step S307, the controller 21 performs a predetermined “Eject” process (step S308).
  • the unique ID and key are recorded on the disc 50 (that is, when the processing shown in the flowchart of FIG. 3 is completed)
  • the unique key of the disc 50 is played back with the disc 50 and content. It is recorded in the nonvolatile memory 23 of the device 20.
  • the Key unique to the disc 50 is the non-volatile content of the content reproduction device 20. Recorded only in the memory 23. Therefore, the device that can reproduce the encrypted data recorded on the disc 50 is only the content reproduction device 20 (that is, only the device that generated the key unique to the disc 50).
  • the key unique to the disk 50 is the disk.
  • the content playback apparatus 20 That is, after the content reproduction apparatus 20 finishes reproducing the encrypted data recorded on the disk 50, it becomes impossible to reproduce the encrypted data recorded on the disk 50.
  • the devices that can reproduce the encrypted data recorded on the disk 50 are restricted, and the number of times the disk 50 is reproduced (one time in this embodiment) is also restricted.
  • the data manager even when the data manager records the data that the user desires to browse on the disk 50 and causes the user to browse the data, the data manager records the data on the disk 50. Data can be suitably protected.
  • the “nonvolatile memory 23” according to the present embodiment is an example of the “storage unit” according to the present invention.
  • the “controller 21” and “recording / playback unit 22” according to the present embodiment are examples of the “recording control unit” and the “playback control unit” according to the present invention.
  • the “controller 11” and the “recording / reproducing unit 12” according to the present embodiment are examples of the “recording unit” and the “erasing unit” according to the present invention.
  • step S ⁇ b> 204 when it is determined that the data recording is completed in the process of step S ⁇ b> 204 (see FIG. 4) described above (step S ⁇ b> 204: Yes), the controller 11 stores the data recorded on the disk 50.
  • the recording / reproducing unit 12, the pickup control unit 15, and the disc motor control unit 17 are each controlled so as to record the reproducible number of times on the disc 50 (step S401).
  • the number of reproducible times may be determined by a data manager or may be determined by an application of a user who desires to view data.
  • step S401 the controller 11 executes the process of step S205 (see FIG. 4).
  • step S ⁇ b> 306 When the data recorded on the disc 50 is reproduced, as shown in FIG. 7, when it is determined that “Eject Command” has been received in the process of step S ⁇ b> 306 (see FIG. 5) (step S ⁇ b> 306: Yes). ) The controller 21 increases the value indicating the number of times of reproduction of the disk 50 stored in the nonvolatile memory 23 of the content reproduction apparatus 20 by 1 (step S501).
  • the controller 21 compares the reproducible number of times recorded on the disk 50 with a value indicating the number of times the disk 50 is stored stored in the non-volatile memory 23, and a value indicating the number of times the disk 50 has been reproduced. It is determined whether or not the number of reproducible times (that is, the limit value) has been reached (step S502).
  • step S502 When it is determined that the value indicating the number of reproductions of the disk 50 has reached the number of possible reproductions (step S502: Yes), the controller 21 determines the ID and key unique to the disk 50 stored in the nonvolatile memory 23. Is deleted (step S503). As a result, it is impossible to reproduce the encrypted data recorded on the disk 50.
  • step S308 when it is determined that the value indicating the number of reproductions of the disk 50 has not reached the number of possible reproductions (step S502: No), the controller 21 performs a predetermined “Eject” process (step S308).
  • the “reproducible number of times” according to the present modification is an example of the “number of times information” according to the present invention.
  • the controller 21 records the number of reproducible times of data recorded on the disk 50 on the disk 50.
  • the recording / reproducing unit 22, the pickup control unit 25, and the disk motor control unit 27 are each controlled (step S601).
  • the “reproducible number of times” according to the present modification is another example of the “number of times information” according to the present invention.
  • the content playback device 20 generates a key specific to the disc 50 (corresponding to “encryption key information” according to the present invention), but in this modification, the content playback device 20 is different from the content playback device 20.
  • the device (not shown) generates a key.
  • the Key generated by the other device is stored in the nonvolatile memory 23 of the content playback device 20, and the content playback device 20 uses the stored Key and the ID generated by the content playback device 20 as the disc 50. May be recorded. In this case, the process of step S103 in the flowchart of FIG. 3 is not performed.
  • the other device may be, for example, a device externally attached to the content reproduction device 20 or a device connected to the content reproduction device 20 via a network. Note that after the key is stored in the non-volatile memory 23 of the content reproduction apparatus 20, the key is deleted from another apparatus.
  • another device may generate the key and ID, and the generated key and ID may be recorded on the disc 50.
  • the content reproducing device 20 may acquire Key from another device based on the ID recorded on the disc 50 when reproducing the encrypted data recorded on the disc 50 by the content recording device 10. Note that after the content reproduction apparatus 20 acquires the key, the key is deleted from the other apparatuses. In this case, the process according to the flowchart of FIG. 3 is not performed.
  • the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the scope or spirit of the invention that can be read from the claims and the entire specification.
  • An information recording method with such a change, A playback apparatus and method, a recording apparatus and method, a computer program, and a recording medium are also included in the technical scope of the present invention.

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  • Signal Processing For Digital Recording And Reproducing (AREA)
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Abstract

L'invention concerne un procédé d'enregistrement d'informations pour un système (1) qui comprend un premier dispositif (20) ayant une unité de stockage (23), et un second dispositif (10). Le procédé d'enregistrement d'informations comprend une première étape d'enregistrement, dans laquelle le premier dispositif enregistre des informations de clé de chiffrement spécifiques à un support d'enregistrement portable (50) dans le support d'enregistrement portable tout en stockant les informations de clé de chiffrement dans une unité de stockage, une seconde étape d'enregistrement, dans laquelle le second dispositif utilise les informations de clé de chiffrement enregistrées dans le support d'enregistrement portable pour chiffrer des informations de contenu et enregistrer les informations de contenu chiffrées dans le support d'enregistrement portable, et une étape de reproduction dans laquelle le premier dispositif décode et reproduit les informations de contenu enregistrées dans le support d'enregistrement portable à l'aide des informations de clé de chiffrement stockées dans l'unité de stockage.
PCT/JP2015/071551 2015-07-29 2015-07-29 Procédé d'enregistrement d'informations, dispositif et procédé de reproduction, dispositif et procédé d'enregistrement, programme informatique, et support d'enregistrement Ceased WO2017017823A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2015/071551 WO2017017823A1 (fr) 2015-07-29 2015-07-29 Procédé d'enregistrement d'informations, dispositif et procédé de reproduction, dispositif et procédé d'enregistrement, programme informatique, et support d'enregistrement
CN201580081929.4A CN107851447B (zh) 2015-07-29 2015-07-29 信息记录方法、内容重放装置及方法、内容记录装置及方法、记录介质
JP2017530552A JP6441482B2 (ja) 2015-07-29 2015-07-29 情報記録方法、再生装置及び方法、記録装置及び方法、コンピュータプログラム並びに記録媒体

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PCT/JP2015/071551 WO2017017823A1 (fr) 2015-07-29 2015-07-29 Procédé d'enregistrement d'informations, dispositif et procédé de reproduction, dispositif et procédé d'enregistrement, programme informatique, et support d'enregistrement

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WO2017017823A1 true WO2017017823A1 (fr) 2017-02-02

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PCT/JP2015/071551 Ceased WO2017017823A1 (fr) 2015-07-29 2015-07-29 Procédé d'enregistrement d'informations, dispositif et procédé de reproduction, dispositif et procédé d'enregistrement, programme informatique, et support d'enregistrement

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JP (1) JP6441482B2 (fr)
CN (1) CN107851447B (fr)
WO (1) WO2017017823A1 (fr)

Citations (4)

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Publication number Priority date Publication date Assignee Title
JP2000311435A (ja) * 1999-04-27 2000-11-07 Matsushita Electric Ind Co Ltd 記憶装置及び記憶方法
JP2002279727A (ja) * 2001-03-16 2002-09-27 Sony Corp 信号記録媒体とコンテンツ信号生成装置及びコンテンツ信号再生方法とコンテンツ信号再生装置
JP2004080631A (ja) * 2002-08-21 2004-03-11 Sony Corp 記録方法、出力方法、記録装置及び出力装置
JP2008059286A (ja) * 2006-08-31 2008-03-13 Hitachi Software Eng Co Ltd 可搬記憶媒体暗号化システム及び該システムを用いたデータ持ち運び方法並びに可搬記憶媒体

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001307427A (ja) * 2000-04-26 2001-11-02 Pioneer Electronic Corp 情報配信装置、情報配信方法並びに情報記録媒体及び情報記録装置
JP4110414B2 (ja) * 2004-12-03 2008-07-02 ソニー株式会社 情報再生装置及び情報記録再生装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000311435A (ja) * 1999-04-27 2000-11-07 Matsushita Electric Ind Co Ltd 記憶装置及び記憶方法
JP2002279727A (ja) * 2001-03-16 2002-09-27 Sony Corp 信号記録媒体とコンテンツ信号生成装置及びコンテンツ信号再生方法とコンテンツ信号再生装置
JP2004080631A (ja) * 2002-08-21 2004-03-11 Sony Corp 記録方法、出力方法、記録装置及び出力装置
JP2008059286A (ja) * 2006-08-31 2008-03-13 Hitachi Software Eng Co Ltd 可搬記憶媒体暗号化システム及び該システムを用いたデータ持ち運び方法並びに可搬記憶媒体

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JP6441482B2 (ja) 2018-12-19
JPWO2017017823A1 (ja) 2018-07-12
CN107851447B (zh) 2020-02-28

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