JP2007318618A - Content distribution system, apparatus and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To convert the contents of a reproduction-only optical disk for over-the-counter sales to a recordable optical disk medium and use it for download distribution.
An authoring device converts content information C ′ in a DVD-video format read from a DVD package media (DVD-ROM) 1 ′ into a VR format, and converts the obtained content information C into content key information Kc. Based on this, the encrypted content information Enc (Kc, C) and the additional information d are written to the recordable DVD medium 3. The distribution device 30 writes the encrypted content information and additional information read from the recordable DVD medium 3 in the encrypted content storage unit 32. Thereby, the distribution apparatus can download and distribute the encrypted content information and the additional information based on the download request.
[Selection] Figure 1

Description

  The present invention relates to a content distribution system, apparatus, and program for distributing content, and in particular, a content distribution system, apparatus capable of converting the content of a reproduction-only optical disk for store sales into a recordable optical disk medium and using it for download distribution And the program.

  Normally, in a content distribution system, for example, DVD media is distributed as an optical disc on which encrypted content is recorded so that it can be decrypted by a legitimate user from the viewpoint of protecting copyright.

  In this type of content distribution system, for example, a DVD-ROM as a master disk is sold over-the-counter as a reproduction-only optical disk on which encrypted content is recorded. The content distribution system is not limited to over-the-counter sales of a DVD-ROM that is a master disk, but may be a case where a copy of a master disk is distributed by download.

  In this case, on the DVD recorder side of the user device, it is considered that the download request is transmitted to the content provider, and the downloaded encrypted content is copied to a recordable DVD medium as a recordable optical disk. Here, the encrypted content corresponds to a copy of the master disk, and the content key is re-encrypted according to each DVD medium.

Further, when the encrypted content includes the advertising content, the encrypted content is generated by adding the advertising content to the content and encrypting the obtained content with the advertisement with the content key.
"Toshiba Review", Toshiba Corporation, June 1, 2003, Vol. 58, No. 6, Internet <URL: http://www.toshiba.co.jp/tech/review/2003/06/index_j.htm

  However, in the content distribution system as described above, the master disk is a DVD-ROM medium sold over-the-counter, and the medium used for copying on the DVD recorder side is a recordable DVD medium, so the content recording method is different. For this reason, it is impossible to download and distribute a copy of a master disk for over-the-counter sales.

  Further, the content recorded on the master disk is in a store sales format, and additional information is required to use it for download distribution.

  In addition, in the case where advertising content accompanies the content, it is necessary to replace the advertising content according to market conditions. However, in the content distribution method described above, encrypted content is generated by encrypting content with an advertisement, so that it is difficult to replace the advertising content later.

  The present invention has been made in view of the above circumstances, and provides a content distribution system, apparatus, and program that can be used for download distribution by converting the contents of a reproduction-only optical disk for over-the-counter sales into a recordable optical disk medium. For the purpose.

  Another object of the present invention is to provide a program that can facilitate replacement of advertising content when the advertising content accompanies the content.

  1st invention can hold | maintain the read-only optical disk in which the content information of the 1st format was recorded, and the 1st and 2nd recording type | mold optical disc which has a 2nd format different from the said 1st format sequentially or simultaneously. Based on the content authoring device, the distribution device capable of downloading and distributing the corresponding storage contents in the distribution storage device, and the content key information for encryption and decryption are stored in the management storage device and managed based on the download request A content distribution system comprising a key management device, wherein the content authoring device reads means for reading content information of the first format from the read-only optical disc when the read-only optical disc is held. A storage device to which the read content information in the first format is written, and a first format in the storage device Based on the content key information, the means for converting the content information to obtain the content information in the second format, the means for creating additional information of the content information, the means for generating the content key information, and the content key information Means for encrypting two types of content information and obtaining the encrypted content information; and when holding the first recordable optical disc, the encrypted content information and the additional information are stored in the first recordable optical disc. Means for writing, and means for encrypting the content key information based on the media-specific information of the second recordable optical disc to obtain encrypted content key information when holding the second recordable optical disc; Means for writing the encrypted content key information and the additional information to the second recordable optical disc medium, As a distribution device, means for reading encrypted content information and additional information from the first recordable optical disc when holding the first recordable optical disc after writing by the content authoring device, and the read encrypted content Means for writing information and additional information to the distribution storage device, and the key management device, when holding the second recordable optical disc after the writing by the content authoring device, Means for reading media unique information, encrypted content key information and additional information from a type optical disc, means for decrypting encrypted content key information based on the read media unique information, obtaining content key information, and the content key Means for writing information and additional information to the management storage device. Content distribution system.

  The second invention differs from the first format in the first read-only optical disc on which the content information of the first format is recorded and the second read-only optical disc on which the advertisement content information of the first format is recorded. A program for use in a content authoring apparatus capable of sequentially or simultaneously holding the first to third recordable optical discs having the second format and having a storage device, wherein the computer of the content authoring apparatus includes the first computer Means for reading content information of the first format from the read-only optical disc when holding one read-only optical disc, means for writing the read content information of the first format to the storage device, and the storage device Means for converting the content information of the first format in the content to obtain the content information of the second format, the second reproduction Means for reading out the first type of advertising content information from the read-only optical disc, holding means for writing the read first type of advertising content information into the storage device, Means for converting advertisement content information in the first format to obtain advertisement content information in the second format, means for generating content key information for encryption and decryption, and the second format based on the content key information Means for encrypting the content information and obtaining the encrypted content information; means for writing the encrypted content information to the first recordable optical disc when the first recordable optical disc is held; When holding a recordable optical disc, the content key information is used as the media specific information of the second recordable optical disc. Means for encrypting and obtaining encrypted content key information, means for writing the encrypted content key information to the second recordable optical disk medium, and advertising content information of the second format in the third recordable optical disk medium The advertising content information in the second format is encrypted based on the content key information to become encrypted advertising content information, and the encrypted advertising content information is included in the encrypted content information. It is a program that is information distributed along with it.

(Function)
In the first invention, the content authoring apparatus converts the content information of the first format read from the read-only optical disc, encrypts the obtained content information of the second format based on the content key information, and this encrypted content Information and additional information are written to the first recordable optical disk. The distribution device writes the encrypted content information and the additional information read from the first recordable optical disk after writing to the distribution storage device. Thereby, the distribution apparatus can download and distribute the encrypted content information and the additional information in the distribution storage device based on the download request. Similarly, in the key management device, when the medium specific information, the encrypted content key information, and the additional information are read from the second recordable optical disc after writing, the encrypted content key information is decrypted based on the medium specific information, The obtained content key information and additional information are written into the management storage device. As a result, the key management apparatus can provide decrypted encrypted content key information and additional information to an authorized user who purchased the content.

  In this way, the content of a reproduction-only optical disc for over-the-counter sales can be converted into a recordable optical disc medium and used for download distribution.

  In the second invention, in the content authoring apparatus of the first invention, the first format advertising content information read from the read-only optical disc is converted, and the obtained second format advertising content information is converted to the third recordable optical disc. Write to. As a result, the key management device can encrypt the advertisement content information read from the third recordable optical disc with the content key information in the management storage device, and write the obtained encrypted advertisement content information to the recordable optical disc. It becomes. In addition, the distribution apparatus can replace the encrypted advertisement content information read from the recordable optical disc with the other encrypted content information that has been attached up to the previous time so as to be attached to the encrypted content information described above.

  Thus, by encrypting the content information and the advertising content information separately with the same content key information, when the advertising content accompanies the content, the replacement of the advertising content can be facilitated.

  As described above, according to the present invention, the contents of a reproduction-only optical disk for over-the-counter sales can be converted into a recordable optical disk medium and used for download distribution. In addition, when the advertising content accompanies the content, the advertising content can be easily replaced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a schematic diagram showing a configuration of a content distribution system according to the first embodiment of the present invention. This content distribution system includes an authoring device (content authoring device) 10 used for a content holder, a license center device (key management device) 20 used for a license center, and a distribution device 30 used for a content provider. Each of the devices 10 to 30 is realized by a hardware configuration or a combination configuration of hardware and software. In the case of a combination configuration with software, a program for realizing the functions of the devices 10 to 30 is implemented by being installed in advance from a storage medium or a network to the computers of the devices 10 to 30.

  Here, the authoring device 10 includes a DVD package reading unit 11, a storage device 12, a content conversion unit 13, an additional information input unit 14, a content encryption unit 15, an encrypted content writing unit 16, and an encrypted content key writing unit. 17 is provided. The authoring device 10 has a DVD recorder dedicated to authoring (a function of converting the DVD-video format into the VR format), executes an encryption process inside the device 10, and obtains the content key Kc of the device 10. There is a feature not to go out.

  The DVD package reading unit 11 has a function of detachably holding a DVD package medium (DVD-ROM) 1 ′ in which content information C ′ in the DVD-video format (first format) is recorded, and the held DVD package media 1 A function of reading content information C ′ from “and a function of writing the read content information C ′ to the storage device 12. Here, the content information C ′ in the DVD-video format may be called content for DVD-ROM (playback-only optical disc) package media.

  The storage device 12 is a storage device as a hardware resource that can be written from the DVD package unit 11 and can be read from the content conversion unit 13, and stores content information C ′ in the DVD-video format.

  The content conversion unit 13 converts the DVD-video format content information C ′ in the storage device 12 into a VR (Video Recording format) format, and obtains the VR format (second format) content information C. The content information C is transmitted to the content encryption unit 15. Here, the content information C in the VR format may be referred to as content for recordable DVD (recordable optical disc) media. Note that the term “recording type” includes “additional writing type” that allows additional recording only once and “rewritable type” that can be rewritten many times. Further, in this specification, the term “optical disk” is not limited to a DVD, and may be any optically readable storage medium (eg, CD). The term “DVD” is not limited to the DVD based on the current DVD standard or the DVD having high compatibility with the current DVD standard (for example, HD-DVD), and has almost no compatibility with the current DVD standard. DVDs (eg, DVDs based on the Blu-ray Disk standard) are also included.

  The additional information input unit 14 creates a license information (content copy condition / playback condition) and additional information (content ID, purchase price, etc.) d by operating the content holder, and sets the license condition and additional information d to the content. And a function of inputting to the encryption unit 15.

  Upon receiving the permission information and the additional information d from the additional information input unit 14, the content encryption unit 15 generates content key information Kc for encryption and decryption, and converts the content based on the content key information Kc. The function of encrypting the content information C in the VR format received from the unit 13 and obtaining the encrypted content information Enc (Kc, C), and encrypting the obtained encrypted content information Enc (Kc, C) and the additional information d And a function for sending to the content writing unit 16.

  In addition, when the content encryption unit 15 receives the media unique information IDm of the recordable DVD medium 2 in the VR format from the encrypted content key writing unit 17, the content encryption unit 15 performs the content key information Kc and the permission based on the media unique information IDm. A function for encrypting information and obtaining encrypted content key information Enc (IDm, Kc), and sending the obtained encrypted content key information Enc (IDm, Kc) and additional information d to the encrypted content key writing unit 17 It has a function to do. Here, the encrypted content key information Enc (IDm, Kc) may be called a license.

  The encrypted content writing unit 16 records the VR-format recordable DVD media 3 in a detachable manner, and the encrypted content information Enc (Kc, C) and additional information d received from the content encryption unit 15. Type DVD media 3. The recordable DVD medium 3 is delivered to the distribution device 30 after the encrypted content information Enc (Kc, C) and the additional information d are written.

  The encrypted content key writing unit 17 sends the VR-type recordable DVD media 2 in a detachable manner and the media unique information IDm read from the held recordable DVD media 2 to the content encryption unit 15. And a function of writing the encrypted content key information Enc (IDm, Kc) and the additional information d received from the content encryption unit 15 to the recordable DVD medium 2. The recordable DVD medium 2 is delivered to the license center device 20 after the encrypted content key information Enc (IDm, Kc) and the additional information d are written.

  On the other hand, the license center device 20 includes an encrypted content reading unit 21, an encrypted content key decrypting unit 22, and a content key storage unit (management storage device) 23.

  Here, the encrypted content reading unit 21 has a function of detachably holding the recordable DVD medium 2 after being written by the authoring device 10, and the medium-specific information IDm and the encrypted content key information Enc from the held recordable DVD medium. The function of reading (IDm, Kc) and additional information d, the function of writing this additional information d in the content key storage unit 23, and the media-specific information IDm and encrypted content key information Enc (IDm, Kc) are encrypted content keys. And a function of sending to the decoding unit 22.

  The encrypted content key decrypting unit 22 decrypts the encrypted content key information Enc (IDm, Kc) based on the media unique information IDm received from the encrypted content reading unit 21 to obtain the content key information Kc and permission information. And a function of writing the content key information Kc and the permission information in the content key storage unit 23 in association with the additional information d in the content key storage unit 23.

  The content key storage unit 23 is a storage device as a hardware resource that can be written from the encrypted content key reading unit 21 and can be read / written from the encrypted content key storage unit 22, and includes content key information Kc, permission Information and additional information d are stored.

  The distribution device 30 is a device that can download and distribute the corresponding storage contents in the encrypted content storage unit 32 based on a download request from the user. The distribution device 30 includes an encrypted content reading unit 31 and an encrypted content storage unit (distribution). Storage device) 32.

  Here, the encrypted content reading unit 31 has a function of detachably holding the recordable DVD medium 3 after writing by the authoring device 10 and the encrypted content information Enc (Kc, C) from the held recordable DVD medium 3. And a function of reading the additional information d, and a function of writing the read encrypted content information Enc (Kc, C) and the additional information d into the encrypted content storage unit 32.

  The encrypted content storage unit 32 is a storage device as a hardware resource that can be written from the encrypted content reading unit 31 and can be read from a distribution unit (not shown), and includes encrypted content information Enc (Kc, C) and additional information. The encrypted content storage unit 32 stores information d.

  Next, the operation of the content distribution system configured as described above will be described with reference to the sequence diagram of FIG.

  In the authoring apparatus 10, the DVD package reading unit 11 holds the DVD package media 1 ′ in which the DVD-video format content information C ′ is recorded in a detachable manner, and reads the content information C ′ from the DVD package media 1 ′. (ST1). The read content information C ′ is written in the storage device 12.

  The content conversion unit 13 converts the content information C ′ in the DVD-video format in the storage device 12 (ST2), and obtains content information C in the VR format. The obtained content information C is sent to the content encryption unit 15.

  The additional information input unit 14 creates license information (content copy conditions / playback conditions) and additional information (content ID, purchase price, etc.) d by operating the content holder, and encrypts the license conditions and the additional information d. Input to the unit 15 (ST3).

  Upon receiving the permission information and the additional information d, the content encryption unit 15 generates content key information Kc for encryption and decryption, and based on the content key information Kc, the content encryption unit 15 receives the VR format received from the content conversion unit 13. The content information C is encrypted (ST4) to obtain encrypted content information Enc (Kc, C). The obtained encrypted content information Enc (Kc, C) and additional information d are sent to the encrypted content writing unit 16.

  Further, when the content encryption unit 15 receives the media unique information IDm read from the VR-format recordable DVD medium 2 from the encrypted content key writing unit 17 (ST5), the content encryption unit 15 is based on the media unique information IDm. Then, the content key information Kc and the permission information are encrypted in a form depending on each medium of the recordable DVD medium 2 (ST6), and the encrypted content key information Enc (IDm, Kc) is obtained. The obtained encrypted content key information Enc (IDm, Kc) and additional information d are sent to the encrypted content key writing unit 17.

  The encrypted content key writing unit 17 detachably holds the VR type recordable DVD medium 2 and records the encrypted content key information Enc (IDm, Kc) and the additional information d received from the content encryption unit 15. Type DVD media 2 is copied and written (ST7). After the writing, the recordable DVD medium 2 is delivered to the license center device 20.

  The encrypted content writing unit 16 detachably holds the VR format recordable DVD medium 3 and stores the encrypted content information Enc (Kc, C) and the additional information d received from the content encrypting unit 15 on the recordable DVD. Copy and write to the medium 3 (ST8). After writing, the recordable DVD medium 3 is delivered to the distribution device 30.

  On the other hand, in the license center device 20, the encrypted content reading unit 21 is detachably held on the delivered recordable DVD medium 2 by the operation of the license center member. The encrypted content reading unit 21 reads the media unique information IDm, the encrypted content key information Enc (IDm, Kc), and the additional information d from the stored recordable DVD medium (ST9). This additional information d is written in the content key storage unit 23. The media unique information IDm and the encrypted content key information Enc (IDm, Kc) are sent to the encrypted content key decrypting unit 22.

  The encrypted content key decrypting unit 22 decrypts the encrypted content key information Enc (IDm, Kc) based on the media unique information IDm (ST10), and obtains the content key information Kc and permission information. The content key information Kc and permission information are written and stored in the content key storage unit 23 in association with the additional information d in the content key storage unit 23 (ST11).

  As a result, the license center device 20 re-encrypts the license request from the legitimate user who purchased the content with the media unique information IDmu of the DVD medium owned by the user (encrypted content for content decryption). Key information Enc (IDmu, Kc)) can be issued.

  On the other hand, in the distribution device 30, the delivered recordable DVD media 3 is held in the encrypted content reading unit 31 by the operation of the content provider. The encrypted content reading unit 31 reads the encrypted content information Enc (Kc, C) and the additional information d from the stored recordable DVD medium 3 (ST12). The read encrypted content information Enc (Kc, C) and additional information d are written and stored in the encrypted content storage unit 32 (ST13).

  Hereinafter, the distribution device 30 can download and distribute the encrypted content information Enc (Kc, C) and the additional information d in the encrypted content storage unit 32 based on the download request. As a result, the key management apparatus can provide decrypted encrypted content key information and additional information to an authorized user who purchased the content.

  As described above, according to the present embodiment, the authoring device 10 can convert the contents of a DVD-ROM for over-the-counter sales into a recordable DVD medium and use it for download distribution. Further, the authoring device 10 can add additional information d necessary for download sales.

  Further, the two recordable DVD media 2 and 3 are distributed among the three parties of the content holder using the authoring device 10, the content provider using the distribution device 30, and the license center using the license device 30. Deliver encrypted content and license (encrypted content key). For this reason, unlike the transmission on the network, the encrypted content and the license can be delivered safely without eavesdropping.

(Second Embodiment)
FIG. 3 is a schematic diagram showing the configuration of a content distribution system according to the second embodiment of the present invention. The same parts as those in FIG. Mainly stated. The following embodiments are also the same, and a duplicate description is omitted.

  In other words, this embodiment is a modification of the first embodiment, in which the additional information d is not delivered by the recordable DVD medium, but the additional information d is registered from the authoring device 10 to the distribution device 30 and The license is transmitted to the license center device 20.

  Accordingly, the additional information input unit 14 of the authoring apparatus 10 uses the content registration site unit 33 instead of the content encryption unit 15 as the input destination of the additional information d in the above-described function. Further, the content encryption unit 15, the encrypted content writing unit 16, the encrypted content key writing unit 17, and the encrypted content reading unit 21 are omitted from the function related to the additional information d.

  In the license center device 20, an additional information receiving unit 24 is added. The additional information receiving unit 24 has a function of receiving the additional information d from the content registration site unit 33 and a function of writing the additional information d in the content key storage unit 23.

  In the distribution apparatus 30, a content registration site unit 33 is added. The content registration site unit 33 has a function of receiving additional information d from the additional information input unit 14 of the authoring apparatus 10 via the network, a function of writing the additional information d in the encrypted content storage unit 32, and an encrypted content storage unit. 32 has a function of transmitting the additional information d written in 32 to the license center apparatus 20.

  Further, the encrypted content reading unit 31 has a function of reading the encrypted content information Enc (Kc, C) from the held recordable DVD medium 3 and stores the read encrypted content information Enc (Kc, C) in the encrypted content storage. A function of writing to the encrypted content storage unit 32 in association with the additional information d in the unit 32.

  Next, the operation of the content distribution system configured as described above will be described with reference to the sequence diagram of FIG.

  In the authoring device 10, steps ST <b> 1 and ST <b> 2 are executed as described above, and the content information C converted into the VR format is sent to the content encryption unit 15.

  Subsequently, the additional information input unit 14 creates license information (content copy conditions / playback conditions) and additional information (content ID, purchase price, etc.) d by operating the content holder, and sets the license conditions to the content encryption unit. 15 The additional information input unit 14 registers the input additional information d in the content registration site unit 33 of the content holder by operating the content holder (ST3 ', ST3-2).

  The content registration site unit 33 writes the additional information d received from the additional information input unit 14 via the network into the encrypted content storage unit 32. Further, the content registration site unit 33 transmits the additional information d written in the encrypted content storage unit 32 to the license center apparatus 20 (ST3-3).

  In the license center apparatus 20, when the additional information receiving unit 24 receives the additional information d (ST3-4), the additional information d is written and stored in the content key storage unit 23 (ST3-5).

  On the other hand, in the authoring apparatus 10, when the content encryption unit 15 receives the permission information, the content encryption unit 15 generates content key information Kc for encryption and decryption, and the encrypted content information Enc ( Kc, C) is sent to the encrypted content writing unit 16.

  Further, the content encryption unit 15 sends the obtained encrypted content key information Enc (IDm, Kc) to the encrypted content key writing unit 17 in steps ST5 to ST6 as described above.

  The encrypted content key writing unit 17 detachably holds the VR-format recordable DVD medium 2, and stores the encrypted content key information Enc (IDm, Kc) received from the content encryption unit 15. (ST7 '). After the writing, the recordable DVD medium 2 is delivered to the license center device 20.

  The encrypted content writing unit 16 detachably holds the VR format recordable DVD medium 4 and copies the encrypted content information Enc (Kc, C) received from the content encrypting unit 15 to the recordable DVD medium 4. And write (ST8 '). After the writing, the recordable DVD medium 4 is delivered to the distribution device 30.

  On the other hand, in the license center device 20, the encrypted content reading unit 21 is detachably held on the delivered recordable DVD medium 2 by the operation of the license center member. The encrypted content reading unit 21 reads the media unique information IDm and the encrypted content key information Enc (IDm, Kc) from the stored recordable DVD medium (ST9 '). The media unique information IDm and the encrypted content key information Enc (IDm, Kc) are sent to the encrypted content key decrypting unit 22.

  Hereinafter, as described above, in the license center device 20, steps ST10 to ST11 are executed, and the decrypted content key information Kc and permission information are associated with the additional information d in the content key storage unit 23 in the content key storage unit 23. Written and stored.

  In the distribution device 30, the distributed recordable DVD medium 4 is held in the encrypted content reading unit 31 by the operation of the content provider. The encrypted content reading unit 31 reads the encrypted content information Enc (Kc, C) from the stored recordable DVD medium 4 (ST12 '). The read encrypted content information Enc (Kc, C) is written and stored in the encrypted content storage unit 32 in association with the additional information d in the encrypted content storage unit 32 (ST13 ').

  As described above, according to the present embodiment, even when the additional information d is registered to the distribution device 30 from the authoring device 10 and is transmitted from the distribution device 30 to the license center device 20, An effect can be obtained.

  Further, since the additional information d is registered in the content registration site unit 33 of the distribution apparatus 30, the additional information d can be quickly passed to the distribution apparatus 30 and the license center apparatus 20, and the additional information d is added. Corrections can be made instantly.

(Third embodiment)
FIG. 5 is a schematic diagram showing a configuration of a content distribution system according to the third embodiment of the present invention. This embodiment is a modification in the case where encrypted advertisement content information is attached to encrypted content information to be distributed, and has a configuration in which a function related to advertisement content is added to the first or second embodiment. . However, for simplification of description, the respective parts 14 to 17, 21, 22, 31, and 33 shown in FIG. 1 or 3 are not shown. The same applies to the following embodiments.

  Here, in the authoring device 10, the DVD package reading unit 11, the storage device 12, and the content conversion unit 13 described above also have content information C ′ and C for advertisement content information (including advertisement content IDad) ad ′ and ad. It is the structure which functions similarly. Further, the authoring apparatus 10 is provided with a correspondence table / schedule creation unit 18 and an advertisement content writing unit 19. The DVD package medium 5 'is a DVD-ROM in which advertisement content information ad' in the DVD-video format is recorded.

  When the correspondence table / schedule creation unit 18 receives the advertisement content information ad in VR format including the advertisement content IDad from the content conversion unit 13, the correspondence table / schedule creation unit 18 creates correspondence table information Tid between the advertisement content IDad and the content ID by operating the content holder. And a function for creating replacement schedule information dsc by operating a content holder, and a function for sending advertisement content information ad, correspondence table information Tid, and replacement schedule information dsc to advertisement content writing unit 19. Here, the replacement schedule information dsc is information in which the advertisement content IDad, the content ID, and the advertisement provision period are associated with each other.

  When the advertising content writing unit 19 receives the recordable DVD media 6 and 7 in a detachable manner and the advertising content information ad, the correspondence table information Tid, and the replacement schedule information dsc from the correspondence table / schedule creation unit 18, It has a function of writing the advertisement content information ad and the correspondence table information Tid into the recordable DVD medium 6 for the license center and a function of writing the replacement schedule information dsc into the recordable DVD medium 7 for the distribution apparatus.

  On the other hand, the license center apparatus 20 has an advertisement content reading unit 25 and an advertisement content encryption unit 26 added thereto.

  The advertisement content reading unit 25 has a function of detachably holding the VR-format recordable DVD medium 6, a function of reading the advertisement content information ad and the correspondence table information Tid from the held recordable DVD medium 6, and the read advertisement content A function of sending the information ad and the correspondence table information Tid to the advertisement content encryption unit 26;

  When receiving the advertisement content information ad and the correspondence table information Tid from the advertisement content reading unit 25, the advertisement content encryption unit 26 receives the advertisement content information ad and the correspondence table information Tid from the advertisement content reading unit 25. Based on the content ID, the function of reading the corresponding content key information Kc from the content key storage unit 23, and based on the content key information Kc, the advertising content information ad is encrypted, and the encrypted advertising content information Enc (Kc, ad ) And a function of writing the encrypted advertisement content information Enc (Kc, ad) to the stored recordable DVD medium 8.

  On the other hand, the distribution device 30 includes an encrypted advertisement content reading unit 34, a schedule storage unit 35, an encrypted advertisement content storage unit 36, and an advertisement replacement unit 37, and a distribution unit 38 is illustrated.

  Here, the encrypted advertisement content reading unit 34 has a function of detachably holding the recordable DVD media 7 and 8 in the VR format, and the replacement schedule information dsc read from the held recordable DVD media 7 as a schedule storage unit 35. And the function of writing the encrypted advertisement content information Enc (Kc, ad) read from the stored recordable DVD medium 8 into the encrypted advertisement content storage unit 36.

  The schedule storage unit 35 is a storage device that can be written from the encrypted advertisement content reading unit 34 and can be read from the advertisement replacement unit 37, and stores replacement schedule information dsc.

  The encrypted advertisement content storage unit 36 is a storage device as a hardware resource that can be written from the encrypted advertisement content reading unit 34 and can be read from the advertisement replacement unit 37, and the encrypted advertisement content information Enc (Kc, ad ) Is stored.

  The advertisement replacement unit 37 reads the replacement schedule information dsc from the schedule storage unit 35, and the encrypted content information before replacement from the encrypted content storage unit 32 in advance of the advertisement provision period based on the replacement schedule information dsc. A function of reading Enc (Kc, C) and reading new encrypted advertisement content information Enc (Kc, ad) from the encrypted advertisement content storage unit 36 and an advertisement area of the encrypted content information Enc (Kc, C) A function of replacing certain current encrypted advertisement content information with new encrypted advertisement content information Enc (Kc, ad) and the encrypted content information Enc (Kc, C) after replacement are written in the encrypted content storage unit 32. It has a function.

  For example, as shown in FIG. 6, based on the replacement schedule information dsc, the current encrypted advertisement content information in the advertisement area connected to the encrypted content information Enc (Kc2, C2) is new encrypted advertisement content information Enc ( Kc2, ad1), Enc (Kc2, ad3), Enc (Kc2, ad4).

  The advertisement area is an area for inserting advertisement content. Each encrypted advertisement content information Enc (Kc2, ad1), Enc (Kc2, ad3), Enc (Kc2, ad4) is generated with the same data amount (bit length) from the viewpoint of facilitating replacement. Also, the encrypted content information Enc (Kc2, C2) and the encrypted advertisement content information Enc (Kc2, ad1), Enc (Kc2, ad3), Enc (Kc2, ad4) can be decrypted with the same content key information Kc. It has become. The encrypted content information Enc (Kc, C) and the encrypted advertisement content information Enc (Kc, ad) are “encrypted content information Enc (Kc, ad) ‖Enc (Kc, C)” from the viewpoint of accuracy. "Enc (Kc, ad) ‖ may be written side by side on Enc (Kc, C) as in", but the description of "Enc (Kc, ad) ‖" is omitted from the viewpoint of simplification. Here, the symbol ‖ means connection.

  The distribution unit 38 has a function of downloading and distributing the encrypted content information Enc (Kc, C) and the additional information d after replacement in the encrypted content storage unit 32 based on the download request.

  Next, the operation of the content distribution system configured as described above will be described with reference to the sequence diagram of FIG. Since the operation of the first or second embodiment is executed as described above, only the operation related to the advertisement content will be described here.

  In the authoring apparatus 10, the DVD package reading unit 11 holds the DVD package medium 5 ′ on which the DVD-video format advertisement content information ad ′ is recorded in a detachable manner, and the advertisement content information ad ′ from the DVD package medium 5 ′. Is read (ST21). The read advertisement content information ad ′ is written in the storage device 12.

  The content conversion unit 13 converts the advertising content information ad 'in the DVD-video format in the storage device 12 (ST22), and obtains the advertising content information ad in the VR format. The obtained advertisement content information ad is sent to the correspondence table / schedule creation unit 18.

  Upon receiving the advertisement content information ad, the correspondence table / schedule creation unit 18 creates correspondence table information Tid between the advertisement content IDad and the content ID by operation of the content holder, and also creates replacement schedule information dsc (ST23). The advertisement content information ad, the correspondence table information Tid, and the replacement schedule information dsc are sent to the advertisement content writing unit 19.

  The advertisement content writing unit 19 holds the recordable DVD media 6 and 7 sequentially or simultaneously, and copies and writes the advertisement content information ad and the correspondence table information Tid to the recordable DVD media 6 for the license center (ST24), The replacement schedule information dsc is written in the recordable DVD medium 6 for the distribution apparatus (ST25).

  The recordable DVD medium 6 for the license center is delivered to the license center device 20. The recordable DVD media 7 for the distribution device is delivered to the distribution device 30.

  In the license center device 20, when the advertising content reading unit 25 reads the advertising content information ad and the correspondence table information Tid from the held recordable DVD medium 6 (ST26), the advertising content information ad and the correspondence table information Tid are converted into the advertising content encryption. To the conversion unit 26.

  When the advertising content encryption unit 26 reads the corresponding content key information Kc from the content key storage unit 23 based on the content ID in the correspondence table information Tid, the advertising content information ad is determined based on the content key information Kc. Encryption (ST27) is performed to obtain encrypted advertisement content information Enc (Kc, ad). Note that the license center apparatus 20 encrypts new advertisement content information ad in order to replace the advertisement later because the distribution device 30 of the content provider does not manage the content key Kc.

  Further, the advertisement content encryption unit 26 copies and writes the encrypted advertisement content information Enc (Kc, ad) to the stored recordable DVD medium 8 (ST28). This recordable DVD medium 8 is delivered to the delivery device 30.

  In the distribution device 30, the encrypted advertisement content reading unit 34 writes and stores the encrypted advertisement content information Enc (Kc, ad) read from the stored recordable DVD medium 8 in the encrypted advertisement content storage unit 36 (ST29). , ST30).

  Similarly, the encrypted advertisement content reading unit 34 writes and stores the replacement schedule information dsc read from the stored recordable DVD medium 7 in the schedule storage unit 35 (ST31, ST32).

  When the advertisement replacement unit 37 reads the replacement schedule information dsc from the schedule storage unit 35, based on the replacement schedule information dsc, the encrypted content information Enc before replacement from the encrypted content storage unit 32 in advance of the advertisement provision period. (Kc, C) is read, and new encrypted advertising content information Enc (Kc, ad) is read from the encrypted advertising content storage unit 36.

  Thereafter, the advertisement replacement unit 37 replaces the current encrypted advertisement content information in the advertisement area of the encrypted content information Enc (Kc, C) with new encrypted advertisement content information Enc (Kc, ad) (ST33). ). The encrypted content information Enc (Kc, C) after replacement is written in the encrypted content storage unit 32.

  The distribution unit 38 downloads and distributes the replaced encrypted content information Enc (Kc, C) and additional information d in the encrypted content storage unit 32 based on a download request from the user. In other words, according to the replacement schedule information dsc, the distribution device 30 merges the corresponding encrypted advertisement content information with the encrypted content information when the time before the advertisement replacement time reaches a certain time. Prepare. When the replacement time comes, the current encrypted advertisement-added content information is switched to newly merged encrypted advertisement-added content information.

  As described above, according to the present embodiment, in addition to the effects of the first or second embodiment, content information and advertisement content information are separately encrypted with the same content key information, thereby advertising to the content. When content is attached, it is possible to easily replace advertisement content. Further, the advertising content can be appropriately distributed according to the advertisement providing period.

  Note that this embodiment may be modified as shown in FIG. That is, instead of the advertisement replacement unit 37, the configuration may include a configuration table replacement unit 40 and a configuration table storage unit 41.

  Here, the configuration table replacement unit 40 replaces the configuration table information composed of the advertisement content IDad and the content ID based on the replacement schedule dsc in the schedule storage unit 35 and writes it in the configuration table storage unit 41. In response to the download request, the distribution unit 38 sequentially transmits the content components in accordance with the configuration table information in the configuration table storage unit 41. As described above, the replacement of the advertisement content may be modified to a configuration in which the configuration table information is changed according to the replacement schedule information dsc. The same applies to the following embodiments.

(Fourth embodiment)
FIG. 9 is a schematic diagram showing a configuration of a content distribution system according to the fourth embodiment of the present invention. This embodiment is a modification of the third embodiment, and instead of the configuration in which the advertisement content information ad is passed from the authoring device 10 to the license center device 20, the advertisement content information ad is sent from the authoring device 10 via the distribution device 30. Thus, the license is transferred to the license center device 20.

  In other words, the content holder (authoring device 10) passes the advertisement content information ad and the replacement schedule information dsc to the content provider (distribution device 30). The content provider requests the license center to encrypt the corresponding content key information Kc of the advertisement content information ad according to the replacement schedule information dsc. The subsequent processing is the same as in the third embodiment.

  Accordingly, the authoring apparatus 10 includes a schedule creation unit 18 s in which the function related to the correspondence table information Tid is omitted from the correspondence table / schedule creation unit 18 instead of the correspondence table / schedule creation unit 18. Similarly, the advertisement content writing unit 19 omits the function related to the correspondence table information Tid.

  In the distribution device 30, a read / write unit 42, an advertisement storage unit 43, and an encryption request unit 44 are added.

  Here, the read / write unit 42 has a function of detachably holding the VR recordable DVD media 7 and 9 and a function of reading the replacement schedule information dsc and the advertisement content information ad from the held recordable DVD media 9. A function for writing the read replacement schedule information dsc into the schedule storage unit 35, a function for writing the read advertisement content information ad into the advertisement storage unit 43, and the advertisement content information ad and correspondence table information received from the encryption request unit 44. A function to write Tid to the stored recordable DVD medium 7; Accordingly, the encrypted advertisement content reading unit 34 omits the function related to the replacement schedule information dsc among the functions described above. The recordable DVD medium 7 is delivered to the license center device 20 after the advertisement content information ad and the correspondence table information Tid are written.

  The advertisement storage unit 43 is a storage device that can be written from the read / write unit 42 and can be read from the encryption request unit 44, and stores advertisement content information ad.

  The encryption request unit 44 reads out the replacement schedule information dsc from the schedule storage unit 35 and, based on the replacement schedule information dsc, the correspondence table information Tid between the advertisement content IDad and the content ID in advance of the advertisement provision period. A function to create, a function to read new advertisement content information ad from the advertisement storage unit 43 in advance of the advertisement providing period, and a read / write unit to read the advertisement content information ad and the correspondence table information Tid in advance of the advertisement providing period 42.

  Next, the operation of the content distribution system configured as described above will be described with reference to the sequence diagram of FIG.

  In the authoring device 10, steps ST21 to ST22 are executed as described above, and the advertising content information ad converted into the VR format is sent to the schedule creation unit 18s.

  Upon receiving the advertisement content information ad, the schedule creation unit 18s creates replacement schedule information dsc by operating the content holder (ST23 '), and sends the advertisement content information ad and replacement schedule information dsc to the advertisement content writing unit 19 To do.

The advertisement content writing unit 19 holds the recordable DVD medium 9 in the VR format, and copies and writes the advertisement content information ad and the replacement schedule information dsc to the recordable DVD medium 9 (ST25 ′).
The recordable DVD media 9 for the distribution device is delivered to the distribution device 30.

  In the distribution apparatus 30, the read / write unit 42 reads the replacement schedule information dsc and the advertisement content information ad from the held recordable DVD media 9 (ST31 ′), writes the replacement schedule information dsc in the schedule storage unit 35, The advertisement content information ad is written into the advertisement storage unit 43 (ST32 ′).

  Further, when the encryption request unit 44 reads the replacement schedule information dsc from the schedule storage unit 35, the encryption request unit 44 requests the encryption of the advertisement content information ad based on the replacement schedule information dsc (ST33 ′). The correspondence table information Tid between the advertisement content IDad and the content ID is created in advance, and the new advertisement content information ad read from the advertisement storage unit 43 and the created correspondence table information Tid are read / written to the reading / writing unit 42. Send it out.

The read / write unit 42 writes the advertisement content information ad and the correspondence table information Tid to the stored recordable DVD medium 7. The recordable DVD medium 7 is delivered to the license center device 20 after this writing.
Hereinafter, as described above, the operations after step ST26 are executed.

  As described above, according to the present embodiment, the same effect as that of the third embodiment can be obtained even when the advertising content information ad is passed from the authoring device 10 to the license center device 20 via the distribution device 30. .

  As described above, the present embodiment may be modified to include a configuration table replacement unit 40 and a configuration table storage unit 41 in place of the advertisement replacement unit 37 as shown in FIG.

(Fifth embodiment)
FIG. 12 is a schematic diagram showing a configuration of a content distribution system according to the fifth embodiment of the present invention. The present embodiment is a modification of the third embodiment. Instead of the configuration in which the encrypted advertisement content information Enc (Kc, ad) is transferred from the license center device 20 to the distribution device 30, the encrypted advertisement content information Enc ( Kc, ad) is transferred from the license center device 20 to the distribution device 30 via the authoring device 10.

  In other words, the content holder (authoring device 10) delivers the advertising content information ad to the license center and receives the encrypted advertising content information Enc (Kc, ad) from the license center. The content holder passes the encrypted advertisement content information Enc (Kc, ad) and replacement schedule information dsc to the content provider (distribution apparatus 30). The subsequent processing is the same as in the third embodiment.

  The functions of the devices 10 to 30 are the same as those in the third embodiment. However, the delivery route of the encrypted advertisement content information Enc (Kc, ad) is different.

  Next, the operation of the content distribution system configured as described above will be described with reference to the sequence diagram of FIG.

  In the authoring apparatus 10, steps ST21 to ST24 are executed as described above, and the advertisement content information ad and the correspondence table information Tid are copied and written to the license-type recording medium 6 (ST24). However, step ST25 (writing of replacement schedule information dsc to DVD) is not performed.

  The recordable DVD medium 6 for the license center is delivered to the license center device 20. In the license center apparatus 20, steps ST26 to ST28 are executed as described above, and the encrypted advertisement content information Enc (Kc, ad) is copied and written to the recordable DVD medium 9 (ST28). This recordable DVD medium 9 is delivered to the authoring device 10 unlike the third embodiment.

  In the authoring apparatus 10, the replacement schedule information dsc is copied and written on the recordable DVD medium 9 (ST25 '). Thereafter, the recordable DVD medium 9 is delivered to the delivery device 30.

  In the distribution device 30, the encrypted advertisement content reading unit 34 reads the encrypted advertisement content information Enc (Kc, ad) and the replacement schedule information dsc from the held recordable DVD medium 8 (ST31 ′), and the encrypted advertisement content information. Enc (Kc, ad) is written and stored in the encrypted advertisement content storage unit 36, and the replacement schedule information dsc is written and stored in the schedule storage unit 35 (ST32 ').

  Hereinafter, as described above, the operations after step ST33 are executed.

  As described above, according to the present embodiment, the encrypted advertisement content information Enc (Kc, ad) may be transferred from the license center device 20 to the distribution device 30 via the authoring device 10 as in the third embodiment. The effect of can be obtained.

  Note that this embodiment may be modified to include a configuration table replacement unit 40 and a configuration table storage unit 41 instead of the advertisement replacement unit 37, as shown in FIG.

  Note that the method described in the above embodiment includes a magnetic disk (floppy (registered trademark) disk, hard disk, etc.), an optical disk (CD-ROM, DVD, etc.), a magneto-optical disk (MO) as programs that can be executed by a computer. ), And can be distributed in a storage medium such as a semiconductor memory.

  In addition, as long as the storage medium can store a program and can be read by a computer, the storage format may be any form.

  In addition, an OS (operating system) running on a computer based on an instruction of a program installed in the computer from a storage medium, MW (middleware) such as database management software, network software, and the like realize the above-described embodiment. A part of each process may be executed.

  Further, the storage medium in the present invention is not limited to a medium independent of a computer, but also includes a storage medium in which a program transmitted via a LAN, the Internet, or the like is downloaded and stored or temporarily stored.

  Further, the number of storage media is not limited to one, and the case where the processing in the above embodiment is executed from a plurality of media is also included in the storage media in the present invention, and the media configuration may be any configuration.

  The computer according to the present invention executes each process in the above-described embodiment based on a program stored in a storage medium, and is a single device such as a personal computer or a system in which a plurality of devices are connected to a network. Any configuration may be used.

  In addition, the computer in the present invention is not limited to a personal computer, but includes an arithmetic processing device, a microcomputer, and the like included in an information processing device, and is a generic term for devices and devices that can realize the functions of the present invention by a program. .

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

It is a mimetic diagram showing composition of a contents distribution system concerning a 1st embodiment of the present invention. It is a sequence diagram for demonstrating the operation | movement in the embodiment. It is a schematic diagram which shows the structure of the content delivery system which concerns on the 2nd Embodiment of this invention. It is a sequence diagram for demonstrating the operation | movement in the embodiment. It is a schematic diagram which shows the structure of the content delivery system which concerns on the 3rd Embodiment of this invention. It is a schematic diagram for demonstrating the function of the advertisement replacement part in the embodiment. It is a sequence diagram for demonstrating the operation | movement in the embodiment. It is a schematic diagram for demonstrating the modification in the embodiment. It is a schematic diagram which shows the structure of the content delivery system which concerns on the 4th Embodiment of this invention. It is a sequence diagram for demonstrating the operation | movement in the embodiment. It is a schematic diagram for demonstrating the modification in the embodiment. It is a schematic diagram which shows the structure of the content delivery system which concerns on the 5th Embodiment of this invention. It is a sequence diagram for demonstrating the operation | movement in the embodiment. It is a schematic diagram for demonstrating the modification in the embodiment.

Explanation of symbols

  1 ', 5' ... DVD package media, 2-4, 6-9 ... recordable DVD media, 10 ... authoring device, 11 ... DVD package reading unit, 12 ... storage device, 13 ... content conversion unit, 14 ... additional information Input unit 15 ... Content encryption unit 16 ... Encrypted content writing unit 17 ... Encrypted content key writing unit 18 ... Correspondence table / schedule creation unit 18s ... Schedule creation unit 19 ... Advertising content writing , 20 ... License center device, 21 ... Encrypted content reading unit, 22 ... Encrypted content key decrypting unit, 23 ... Content key storage unit, 24 ... Additional information receiving unit, 25 ... Advertising content reading unit, 26 ... Advertising content Encryption unit 30... Distribution device 31. Encrypted content reading unit 32. Encrypted content storage unit 33. 34: Encrypted advertisement content reading unit, 35 ... Schedule storage unit, 36 ... Encrypted advertisement content storage unit, 37 ... Advertisement replacement unit, 38 ... Distribution unit, 40 ... Configuration table replacement unit, 41 ... Configuration table storage unit 42 ... Read / write unit, 43 ... Advertising storage unit, 44 ... Encryption request unit, C, C '... Content information, d ... Additional information, IDm ... Media specific information, Kc ... Content key information, ad, ad '... advertising content information, Tid ... correspondence table information, dsc ... replacement schedule information.

Claims (13)

A content authoring apparatus capable of sequentially or simultaneously holding a read-only optical disc on which content information of the first format is recorded and a first and second recordable optical discs having a second format different from the first format, and a download A distribution device capable of downloading and distributing the corresponding stored contents in the distribution storage device based on the request, and a key management device for storing and managing the content key information for encryption and decryption in the management storage device Content distribution system,
The content authoring device includes:
Means for reading content information of the first format from the read-only optical disc when holding the read-only optical disc;
A storage device in which the read content information of the first format is written;
Means for converting content information of the first format in the storage device to obtain content information of the second format;
Means for creating additional information of the content information;
Means for generating the content key information;
Means for encrypting the content information in the second format based on the content key information to obtain encrypted content information;
Means for writing the encrypted content information and the additional information to the first recordable optical disc when holding the first recordable optical disc;
Means for encrypting the content key information based on the media specific information of the second recordable optical disc to obtain the encrypted content key information when holding the second recordable optical disc;
Means for writing the encrypted content key information and the additional information to the second recordable optical disc medium;
The distribution device includes:
Means for reading encrypted content information and additional information from the first recordable optical disc when holding the first recordable optical disc after writing by the content authoring device;
Means for writing the read encrypted content information and additional information into the distribution storage device,
The key management device includes:
Means for reading media-specific information, encrypted content key information and additional information from the second recordable optical disc when holding the second recordable optical disc written by the content authoring device;
Means for decrypting encrypted content key information based on the read media-specific information to obtain content key information;
A content distribution system comprising: means for writing the content key information and additional information to the management storage device. A content authoring apparatus capable of sequentially or simultaneously holding a read-only optical disc on which content information of a first format is recorded and first and second recordable optical discs having a second format different from the first format. ,
Means for reading content information of the first format from the read-only optical disc when holding the read-only optical disc;
A storage device in which the read content information of the first format is written;
Means for converting content information of the first format in the storage device to obtain content information of the second format;
Means for generating content key information for encryption and decryption;
Means for encrypting the content information in the second format based on the content key information to obtain encrypted content information;
Means for writing the encrypted content information to the first recordable optical disc when holding the first recordable optical disc;
Means for encrypting the content key information based on the media specific information of the second recordable optical disc to obtain the encrypted content key information when holding the second recordable optical disc;
A content authoring apparatus comprising: means for writing the encrypted content key information to the second recordable optical disc medium. Based on the download request, a distribution device capable of downloading and distributing the corresponding stored contents in the storage device,
Means for reading the encrypted content information and the additional information from the first recordable optical disc when holding the first recordable optical disc in which the encrypted content information to be distributed and the additional information are written;
And a means for writing the read encrypted content information and additional information into the storage device. A key management device that stores and manages content key information in a storage device,
When holding the second recordable optical disc having the media specific information and the encrypted content key information encrypted by the media specific information and the additional information, the media specific from the second recordable optical disc is stored. Means for reading information, encrypted content key information and additional information;
Means for decrypting encrypted content key information based on the read media-specific information to obtain content key information;
A key management apparatus comprising: means for writing the content key information and additional information to the storage device. A first read-only optical disc on which content information in the first format is recorded, a second read-only optical disc on which advertisement content information in the first format is recorded, and a second format having a second format different from the first format. A content authoring apparatus capable of holding the first to third recordable optical discs sequentially or simultaneously,
Means for reading content information of the first format from the read-only optical disc when holding the first read-only optical disc;
A storage device in which the read content information of the first format is written;
Means for converting content information of the first format in the storage device to obtain content information of the second format;
Means for reading advertisement content information of the first format from the read-only optical disc when holding the second read-only optical disc;
Means for writing the read first format advertising content information into the storage device;
Means for converting advertising content information of the first format in the storage device to obtain advertising content information of the second format;
Means for generating content key information for encryption and decryption;
Means for encrypting the content information in the second format based on the content key information to obtain encrypted content information;
Means for writing the encrypted content information to the first recordable optical disc when holding the first recordable optical disc;
Means for encrypting the content key information based on the media specific information of the second recordable optical disc to obtain the encrypted content key information when holding the second recordable optical disc;
Means for writing the encrypted content key information to the second recordable optical disc medium;
A content authoring apparatus comprising: means for writing advertisement content information in the second format on the third recordable optical disc medium. A read-only optical disc on which content information of the first format is recorded and first and second recordable optical discs having a second format different from the first format can be held sequentially or simultaneously, and a storage device is provided. A program used for a content authoring apparatus,
A computer of the content authoring device;
Means for reading content information of the first format from the read-only optical disc when holding the read-only optical disc;
Means for writing the read content information of the first format into the storage device;
Means for converting content information of the first format in the storage device to obtain content information of the second format;
Means for generating content key information for encryption and decryption;
Means for encrypting content information in the second format based on the content key information to obtain encrypted content information;
Means for writing the encrypted content information to the first recordable optical disc when holding the first recordable optical disc;
Means for encrypting the content key information based on the media-specific information of the second recordable optical disc to obtain encrypted content key information when holding the second recordable optical disc;
Means for writing the encrypted content key information to the second recordable optical disc medium;
Program to function as. The program according to claim 6,
The computer,
Means for creating additional information of the content information;
Means for writing the additional information to the first recordable optical disc together with the encrypted content information when holding the first recordable optical disc;
Means for writing the additional information to the second recordable optical disc together with the encrypted content key information when holding the second recordable optical disc;
Program to function as. Based on a download request, a program used in a distribution device capable of downloading and distributing the corresponding stored contents in the storage device,
A computer of the distribution device;
Means for reading encrypted content information and additional information from the first recordable optical disc when holding the first recordable optical disc in which the encrypted content information to be distributed and the additional information are written;
Means for writing the read encrypted content information and additional information into the storage device;
Program to function as. A program used for a key management device that stores and manages content key information in a storage device,
A computer of the key management device;
When holding the second recordable optical disc having the media specific information and the encrypted content key information encrypted by the media specific information and the additional information, the media specific from the second recordable optical disc is stored. Means for reading information, encrypted content key information and additional information;
Means for decrypting encrypted content key information based on the read media-specific information to obtain content key information;
Means for writing the content key information and additional information to the storage device;
Program to function as. Based on a download request, a program used in a distribution device capable of downloading and distributing the corresponding stored contents in the storage device,
A computer of the distribution device;
Means for receiving additional information to be distributed via a network;
Means for writing the additional information to the storage device;
Means for reading the encrypted content information from the first recordable optical disc when holding the first recordable optical disc in which the encrypted content information to be distributed is held;
Means for writing the read encrypted content information to the storage device in association with the additional information;
Program to function as. A program used for a key management device that stores and manages content key information in a storage device,
A computer of the key management device;
Means for receiving additional information to be distributed;
Means for writing the additional information to the storage device;
When holding the second recordable optical disc having the media unique information and having the encrypted content key information encrypted by the media unique information, the media unique information and encryption from the second recordable optical disc Means for reading the content key information,
Means for decrypting encrypted content key information based on the read media-specific information to obtain content key information;
Means for writing the content key information to the storage device in association with the additional information;
Program to function as. A first read-only optical disc on which content information in the first format is recorded, a second read-only optical disc on which advertisement content information in the first format is recorded, and a second format having a second format different from the first format. A program that can be held in sequence or simultaneously with the first to third recordable optical discs and that is used in a content authoring device including a storage device,
A computer of the content authoring device;
Means for reading content information of the first format from the read-only optical disc when holding the first read-only optical disc;
Means for writing the read content information of the first format into the storage device;
Means for converting content information of the first format in the storage device to obtain content information of the second format;
Means for reading advertisement content information of the first format from the read-only optical disc when holding the second read-only optical disc;
Means for writing the read content information of the first format into the storage device;
Means for converting advertising content information of the first format in the storage device to obtain advertising content information of the second format;
Means for generating content key information for encryption and decryption;
Means for encrypting content information in the second format based on the content key information to obtain encrypted content information;
Means for writing the encrypted content information to the first recordable optical disc when holding the first recordable optical disc;
Means for encrypting the content key information based on the media-specific information of the second recordable optical disc to obtain encrypted content key information when holding the second recordable optical disc;
Means for writing the encrypted content key information to the second recordable optical disc medium;
Means for writing the advertising content information in the second format on the third recordable optical disc medium;
Function as
The advertising content information in the second format is encrypted based on the content key information to become encrypted advertising content information, and the encrypted advertising content information is information distributed along with the encrypted content information. A program. The program according to claim 12,
The computer,
Means for creating additional information of the content information;
Means for writing the additional information to the first recordable optical disc together with the encrypted content information when holding the first recordable optical disc;
Means for writing the additional information to the second recordable optical disc together with the encrypted content key information when holding the second recordable optical disc;
Program to function as.

Images