JP2000357370A - Content duplication system, drive device, duplication method, and computer-readable recording medium - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a content duplication system that can copy content if there is one drive device having both functions of a reading side and a recording side. SOLUTION: When a loaded portable recording medium is DVD-Audio, a drive device 2 reads a title recorded on the recording medium, outputs the title to a host computer 1, and records the title on a hard disk device 5 of the computer. Let it. When the loaded portable recording medium is DVD-RAM,
The title recorded on the hard disk device 5 of the host computer 1 is read out by the same computer, and the DVD-RA
Record in M. On the other hand, the title key is read from DVD-Audio without being recorded on the hard disk device 5 of the computer, stored in the EEPROM 23, and then recorded on the DVD-RAM.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a content copying system, a drive device, and a computer-readable recording medium for copying content recorded on a certain recording medium to another recording medium.

[0002]

2. Description of the Related Art DVD-ROM (Digital Versatile Disc Read)
Only Memory), DVD-RAM (Digital Versatile Disc Ra)
The ndom Access Memory) is a portable optical disk having a recording capacity of 4.7 GByte on one side while having a size of only 120 mm in diameter, and is expected to be widely used in the future. In the near future, most general-purpose computers will have access to both DVD-ROMs and DVD-RAMs, since both have logical formats that are optimal for recording computer data, movies, and music. It is conceivable to equip the equipment as standard.

[0003] When a DVD-ROM is a DVD-Audio, a copy of data recorded on the DVD-ROM is based on a copyright protection method for a DVD from the viewpoint of copyright protection.
It will be severely restricted by Control Information (CCI). Here, an outline of the copyright protection method for DVD will be briefly described. In the copyright protection system for DVD, the content is encrypted with an encryption key (generally called a title key) determined by the creator,
It is recorded on a recording medium such as DVD-Audio. The title key is
Generally given for a group of content, a title, and one or more titles recorded on one disc. Such a title key is recorded in the sector header area of DVD-Audio through encryption using a unique encryption key (generally called a disk key) for the DVD-Audio in which the content is recorded, and the disk key itself is Using an encryption key (generally called a master key) defined by a production company that produces the content decoding device,
The data is encrypted and recorded in the DVD-Audio lead-in area. Since the sector header area and the lead-in area are inaccessible to general users, it is extremely difficult to illegally obtain a title key recorded on DVD-Audio.

[0004] Next, how to use such contents on a device will be described. The copyright protection scheme for DVDs does not impose any restrictions on transmitting encrypted content between devices, but completely prohibits the output of unencrypted content outside the device. In addition, the transmission of title keys between devices imposes severe restrictions. This means that even when a DVD-Audio drive device and a content decoding device are connected to reproduce content, a DVD-Audio drive device and a DVD-RAM drive device are connected and a DVD-RAM drive device is connected. The same can be said for copying content from Audio to DVD-RAM. Specifically,
The transmission of the title key is performed only when the two devices perform mutual authentication and confirm each other's validity. At this time, the title key is not transmitted between the devices in a state of being encrypted by the disk key, but when the devices perform mutual authentication, the encryption key (time-variable key) shared by the devices is used. And transmitted between the devices in an encrypted state. FIG. 13 (a)
FIG. 1 is a diagram illustrating a content reproduction system in which a DVD-Audio drive device and a content decoding device are connected. In the figure, a drive unit is a disk access unit 10 for reading content from DVD-Audio.
1. A bus authentication unit 102 for performing mutual authentication with a device connected via a bus. The decoding device includes a bus authentication unit 103 for performing mutual authentication with the MPEG decoding device and a device connected thereto. A descrambler 104 that decrypts the content and an audio decoder 105 that reproduces the decrypted content. In the figure, the transfer of the title key is performed after the bus authentication unit 102 and the bus authentication unit 103 confirm each other's validity. Therefore, if an unauthorized device is connected, the reproduction of the content is prohibited. .

[0005] Finally, a content copy performed when two drive devices are connected will be described. Copy processing performed by a general computer system, that is, so-called file copy, means processing for reading content recorded on a copy source recording medium and recording the content on a copy destination recording medium as it is. On the other hand, the “content copy” simply reads out the content recorded in an encrypted state on the copy source recording medium and once records it in the copy destination, it cannot be said that the content was properly copied. Absent. In addition to this processing, the title key recorded on the recording medium of the copy source is read, and the title key is decrypted using the disc key and the master key. Only after reading from the copy destination recording medium and using the information unique to the copy destination recording medium, once encrypting the decrypted title key again and recording it on the copy destination recording medium,
"Content copy" is completed. In the “content copy”, the process from the decryption of the title key to the re-encryption is required because in the content reproduction system shown in FIG.
This is because it requests the drive device to deliver a valid title key to the drive device connected to itself.

The outline of “content copy” is as described above. According to the DVD-Video standard, such “content copy” is completely prohibited by the request of the video software supplier. However, the DVD-Audio standard requires that the : Registered Trademarks), as is typified by the fact that copying is currently accepted, private recording opportunities are allowed, in which case it is necessary to allow the copy. "Content Copy"
The DVD-Audio standard defines the Copy Control Information (C
CI). This CCI is set in DVD-Audio in association with each content. The CCI includes "copy free" that can be copied freely, "one-generation copy allowed (one copy)" that allows only one generation, "no more copy", Four attributes, "no copy", which does not allow any copying, can be set for each content. For contents for which “copying is possible only for one generation” is set, the number of times of copying from 1 to 10 can be set.

[0007] A drive device for accessing DVD-Audio is provided with a copy permission control unit for determining whether or not to permit copying based on CCI. Specifically, the copy permission control unit holds identification information on the content recorded on the DVD-RAM so far and copy management information including the number of copies, and each time the content is recorded on the DVD-RAM, , The duty to update the number of recordings and the duty to prohibit copying exceeding the number of copies indicated in the CCI. CC
If the copy permission control unit permits the copying of the content in I, the title key is transmitted between the drive devices through the mutual authentication described above, and the DVD-RAM serving as the copy destination
To record. FIG. 13B shows a drive device for reading content from DVD-Audio (read-side drive device).
FIG. 1 is a diagram illustrating a content copying system in which a drive device (recording side drive device) that records content on a DVD-RAM is connected. The read-side drive device and the recording-side drive device in the content copy system shown in the figure are a disk access unit 111 and a disk access unit 112 for accessing DVD-Audio and DVD-RAM, and a bus authentication unit for performing mutual authentication via a bus. 113, bus authentication unit 114
And a copy permission control unit 115 that determines how copying of content is restricted in DVD-Audio.
And a copy permission control unit 116. Only when the copy permission control unit 115 and the copy permission control unit 116 determine that copying is permitted and the bus authentication unit 113 and the bus authentication unit 114 confirm the validity of each other, the DV
The encrypted content is copied from D-Audio to DVD-RAM, and the encrypted title key is also copied from DVD-Audio to DVD-RAM.

[0008]

However, when performing the above-described content copying, a drive device on the reading side for reading content from DVD-Audio and a DVD-RAM
The user must obtain a drive device on the recording side that records the content in the storage device, which may impose an economic burden on the user to purchase two drive devices. In particular, DV
DVD-RAM recorders include DVD-Au
Although some devices also have a dio player, there is no conventional technology that allows a drive device that has both read-side and recording-side functions to efficiently copy content. There is a problem.

A first object of the present invention is to provide a content duplication system and a drive device which can copy contents if there is one drive device having both functions of a reading side and a recording side. . The second purpose is
Even if the transmission of encryption keys between devices is severely restricted in order to comply with the copyright protection system for DVDs,
An object of the present invention is to provide a content duplication system and a drive device capable of copying content from a first recording medium to a second recording medium.

[0010]

In the case where the drive device is used by being connected to a host computer having a built-in hard disk device, the host computer is provided with a bus authentication unit 114 and a copy permission control unit 115, and the above-described operation is performed. “Content copy” may be performed between the drive device and the host computer. That is, DVD-
The drive reads the encryption key and the content stored in the Audio and stores them in the hard disk drive built in the host computer, and then reads the encryption key and the content in the hard disk drive from the hard disk drive. It is put out and stored in DVD-RAM. But like this, "content copy"
Creating a copy on a DVD-RAM from a copy obtained on a hard disk device by the above means a “second generation copy”, that is, a “grandchild copy”. According to the DVD-Audio standard, in order to prevent flooding of content, there are many contents whose CCI is set to "one copy" (one copy). There is a possibility that the copy permission control unit 116 prohibits the copy as being a grandchild copy.

[0011] To avoid falling under such "grandchild copy",
In order to achieve the first and second objects, the present content copying system reads the encrypted content and the encryption key from the first recording medium when the first recording medium is loaded, and reads the read encrypted content. The first means for transferring the content to the host computer and storing the encryption key inside the encrypted content device, and when the second recordable recording medium is loaded after the first recording medium is loaded, the host There is provided a drive device including second means for taking out the encrypted content delivered to the computer and the encryption key stored in the first means and recording both on a second recording medium.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the configuration and operation of a content duplication system will be described with reference to the drawings. First, DVD-Audio and DVD-RAM will be described. FIG. 1 is a diagram showing the appearance of DVD-Audio and DVD-RAM. As shown in the figure, the difference between DVD-Audio and DVD-RAM is that DVD-RAM is loaded into a drive device in a state of being stored in a cartridge 75. Cartridge 7
5 is for the purpose of protecting the recording surface of the DVD-RAM,
When the cartridge 75 is stored, the DVD-RAM is accessed by opening and closing the shutter 76. DVD-Audio and DVD
-RAM can be accessed using a common drive device. Both are UDF (Universal Disk Forma
t) has a file system stipulated in, for example, music content encoded by an encoding method such as LPCM (Linear Pulse Code Modulation) or DOLBY-AC3 is unifiedly managed together with data files for general-purpose personal computers. Is done.

Next, the hardware configuration of the content copying system will be described with reference to the hardware configuration diagram shown in FIG. As shown in FIG. 2, the content copying system includes a host computer 1 which is a general-purpose personal computer,
And a drive device 2. The host computer 1
A display 3 and a keyboard 4 are connected, and a hard disk device 5 and an MPEG decoder card 6 are installed therein.

FIG. 3 is a diagram showing an internal configuration of the content copying system. In the figure, the host computer 1
Are a hard disk drive 5, an MPEG decoder card 6, a host CPU 7, a bus I / F unit 8, a memory 9, a processor bus,
The MPEG decoder card 6 includes a PCI bus, an ATAPI_I / F unit 10, and a PCI_I / F unit 12, an authentication / descrambling LSI.
13, audio decoder 14, D / A converter 15,
It consists of a local bus (note that the MPEG decoder card 6 actually has components for reproducing video, such as a video decoder, but these components are not so closely related to the present embodiment. Omitted.) The drive device 2 includes a spindle motor 17, a pickup 18,
Preamplifier section 19, error correction section 20, ATAPI_I / F section 2
1. A servo section 22, an EEPROM 23, an authentication / scramble / descrambling LSI 25, a control microcomputer 26, and a microcomputer bus. AT is the host computer and drive device
Connected by API. In addition, host computer,
The drive device is SCSI (Small Computer System Interface)
ace), IDE (Integrated Drive Electronics), IEEE13
94, and may be connected by an interface based on USB (Universal Serial Bus) or the like.

[0015] In these configurations, an authentication / descrambling L for performing mutual authentication based on the copyright protection method in DVD is used.
The drive device 2 and the MPEG decoder card 6 have the SI 13 and the authentication / scramble / descramble LSI 25. The drive device 2 can transfer the title key only to the MPEG decoder card 6. I have.

Subsequently, in copying the contents, the components (hard disk device 5, EEPROM 2
3. Authentication / scramble / descramble LSI 25
The descrambling LSI 13) will be described. When the DVD-Audio is loaded into the drive device 2 and the encrypted content is read out from the drive device as indicated by the dashed arrow, the hard disk device 5 stores the DVD-Audio therein. When the DVD-RAM is loaded into the drive device 2, the encrypted contents are transferred to the hard disk device 5.
And outputs it to the drive device 2. FIG.
FIGS. 4A to 4E are diagrams showing how encrypted content is read from DVD-Audio to the hard disk device 5 and encrypted content is written from the hard disk device 5 to the DVD-RAM. is there.

In FIG. 4A, a DVD-RO is connected to a general-purpose personal computer.
When M is set, as shown in FIG.
Is read from DVD-Audio and written to the hard disk device 5 (see arrow). After the encrypted content is written to the hard disk, the DVD-ROM is converted to DVD-RAM as shown in FIG.
Then, as shown in FIG. 4D, the encrypted content is read from the hard disk device 5 and
Recorded on DVD-RAM (see arrow). If the DVD-RAM on which the encrypted content is recorded is ejected as shown in FIG. 4E, a copy of the encrypted content recorded on the DVD-ROM can be obtained on the DVD-RAM.

In this process, the encrypted content is temporarily allocated to the hard disk device 5 (this is called temporary storage of the content). However, as described above, since the configuration other than the MPEG decoder card 6 in the host computer 1 does not have a dedicated LSI for performing mutual authentication based on the copyright protection scheme in DVD, the hard disk device 5 drives encrypted content. Device 2
And the hard disk device 5 cannot receive the title key from the drive device 2. Even if the encrypted content is stored in the hard disk device 5, the hard disk device 5 can prove its validity to the MPEG decoder card 6 and can use the title key.
It cannot be delivered to the MPEG decoder card 6 either. Therefore, the encrypted content cannot be reproduced while stored in the hard disk device 5. Conversely, in this content copying system, the encrypted content can be reproduced only when the drive device 2 reproduces the encrypted content. This is because the drive device 2 has the authentication / scramble / descramble LSI 25 and can transfer the title key to the MPEG decoder card 6. In the present embodiment, the authentication / scramble / descrambling LSI is not provided in the hard disk device 5, but the authentication / scramble / descrambling LSI is provided in the hard disk device 5, and the MPEG decoder card 6 is Can be regarded as a “legitimate device”, the drive device 2 should not deliver the title key to the hard disk device 5. Because the content and the title key are legally copied from the DVD-Audio of the drive device 2 to the hard disk device 5, the DVD-RA of the drive device 2 is copied from the hard disk device 5.
To copy the contents and title key to M,
The grandchild copy of the content is recorded in the VD-RAM. This is because the grandchild copy of the content is often prohibited in the CCI, and the copy to the DVD-RAM is prohibited by the CCI assuming that the copy to the DVD-RAM corresponds to the grandchild copy.

EEPROM (Electrically Erasable Programm
The capable read-only memory 23 is a stationary semiconductor element that can be accessed only by a secret command, and is a secure recording medium that cannot be accessed from the host computer 1. When the content is copied from DVD-Audio to DVD-RAM as shown in FIGS. 4A to 4E, the encrypted content is read from DVD-Audio and read from the hard disk device in the host computer 1. 5, the title key for decrypting the content and the disk key for decrypting the title key are output to the EE without being output to the outside of the drive device 2.
It is stored in the PROM 23. That is, FIGS. 4 (a) to 4 (e)
Of the copy operation from DVD-Audio to DVD-RAM shown in
When the DVD-Audio is loaded, the EEPROM 23 holds the title key read from the DVD-Audio and the disc key for the DVD-Audio, and stores the EEPROM key when the DVD-RAM is loaded.
23 outputs the title key and the disk key to the spindle motor 17, the pickup 18, and the servo unit 22,
Write to VD-RAM. As can be seen from the above, the encrypted content may flow out of the drive device 2, but the title key and the disc key are not shown in FIGS.
In the case of the copy of (e), the user is not out of the gate, and only moves between the DVD-Audio, the DVD-RAM and the EEPROM 23 inside the drive device 2.

Authentication / scramble / descramble LSI 2
5 is a holding unit (25-1) for holding a master key, a descrambler (25-2), a mutual authentication unit (25-3), and a scrambler (25-
4) The descrambler (25-2) decrypts the disc key read from DVD-Audio using the master key, obtains a disc key for DVD-Audio, and uses the disc key to generate a title. Decrypt the key.

The mutual authentication unit (25-3) performs mutual authentication between the drive device and the connected device, and authenticates whether the other device is a legitimate device. Scrambler (25-4)
When the title key is output to the MPEG decoder card 6 (25-4 (1)), the title key is encrypted using the time-variant key obtained when the mutual authentication unit performs the mutual authentication. The converted title key is output to the MPEG decoder card 6. When the title key is recorded on the DVD-RAM (25-4 (2)), the title key is encrypted using the medium identification information unique to the DVD-RAM as a disk key and output to the spindle motor 17 and the servo unit 22. I do. The unique identification information in DVD-RAM is BCA (Burs
t Cutting Area) at the time of manufacture. DV
At the time of recording in the D-RAM, the title key is encrypted with unique identification information for each DVD-RAM.

The authentication / descramble LSI 13 includes a holding unit (13-1) for holding a master key, a mutual authentication unit (13-2), and a descrambler (13-3). Mutual authentication unit (13-2)
Mutual authentication is performed between the EG decoder card 6 and the connected device to authenticate whether the other device is a legitimate device. The descrambler (13-3) receives the encrypted title key from the device that has performed the mutual authentication and sends it to the MPEG decoder card 6 from the drive device 2 (13-3 (1)). Then, the title key is decrypted using the variable key. When the encrypted content is transmitted from the device that has performed the mutual authentication to the MPEG decoder card 6 from the drive device 2 (13-3 (2)), the decrypted title key is used by using the decrypted title key. The content is decrypted, and the decrypted content is transmitted to the audio decoder 1.
4. The content is reproduced by outputting to the D / A converter 15.

This concludes the description of the hardware configuration of the content copying system. Next, DVD-Audi
o, and how the drive device and the hard disk device 5 record the content and the data structure of the information for limiting the number of copies are described. Figure 5 shows a read-only DV
FIG. 3 is a diagram illustrating a data structure of D-Audio. The DVD-Audio physical layer has three areas, such as a CD, a lead-in area 1001, a volume area 1002, and a lead-out area 1003.

The lead-in area 1001 is an area that cannot be accessed by a user through normal operations, and records a title key. The volume area 1002 includes title management information 1004 and a title 1005.
The title 1005 is composed of N pieces of content corresponding to N pieces of music from song # 1 to song #N (N <= 99). In DVD-Audio, a content corresponds to audio data for one song, and a title corresponds to a music album including N songs.

On the other hand, the title management information 1004 includes the title name 1006, the number of songs 1007, and the song numbers # 1 to #N.
Up to attribute information 1008. Title name 1
006 is a unique name given to each title, for example, to each album. 1007 songs are DVD-Audi
It represents the number of songs included in o, and takes an integer value of 1 or more and 99 or less.

The attribute information 1008 indicates the attribute of each song (each content), and includes ISRC information 1010,
Song name 1011, singer name 1012, copy permission flag 101
3, the number of permitted copies 1014, and the recording address 1015. ISRC (International Standard Recording
Code) information 1010 is information uniquely attached to each piece of music content 1009, and includes a country code (two
It consists of ASCII characters), an owner code (three ASCII characters), a recording year (two digits), and a serial number (five digits).

The song name 1011 and the singer name 1012 are character information representing the song name and the singer name for each song content 1009. The copy permission flag 1013 is information indicating whether recording of each piece of music content is permitted, that is, whether copying is possible for each piece of content. The copy permission flag 1013 for the content permitted to be copied is set to “0”, and the copy permission flag 1013 for the content not permitted to be copied is set to a value of “1”.

The number of permitted copies 1014 is information that is valid for the content for which the value of the above-described copy permission flag 1013 is set to “0”, and the maximum number of permitted copies is set by an integer value. Is done. Copy permission flag 1013
Is “1”, and the number of permitted copies 1014 for content for which copying is not permitted is set to a value of “0”.

The recording address 1015 indicates a recording address in the DVD-Audio for each music content 1009, and information of a recording start address is recorded in, for example, a sector unit (1 sector = 2048 bytes). The song name 1011, singer name 1012, copy permission flag 1013, recording address 10
15, the host computer 1 displays a menu screen as shown in FIG. 6 and can accept a content copy instruction and a content reproduction instruction. FIG. 6 is a diagram showing an interactive screen for accepting a content copy instruction and a content reproduction instruction.

In the figure, the song titles "Song1", "Song2" and "So"
ng3 ”, singer names“ Singer1 ”,“ Singer2 ”and“ Singer3 ”
Recording time "4 minutes 43 seconds""3 minutes 39"
Second "," 3:22 ", and copy permission information" Yes "" Yes "" Yes "indicating whether copying of each music data is permitted.
Is displayed in association with. These can be displayed by acquiring the song title 1011, the singer name 1012, and the recording address 1015 in the DVD-Audio. For example, the song name 1201 and the singer name 1202 use the song name 1011 and the singer name 1012 in the DVD-Audio as they are, and the recording time 1203 is from the recording address 1015 for the content to the recording address 1015 for the next content. It is calculated based on the data length.
The copy permission information 1204 is displayed by using the copy permission flag 1013. In this example, DVD-Audio
This indicates that five song contents 1009 are recorded. Users can use this information to create DVD-Audio
To copy the music contents existing in the DVD-RAM to the DVD-RAM. Of course, it is also possible to set the number of permitted copies of the music contents 1009 recorded on the DVD-Audio collectively, that is, in units of titles, and to instruct the user whether to copy.

Next, how information for limiting the number of copies is recorded in the EEPROM 23 will be described. The EEPROM 23 stores title copy history information for managing a copy history for each title, and the above-described title key and disc key are stored in the EEPROM 23 as elements of the copy history information. FIG. 7 is a diagram showing a data structure of title duplication history information for each title. In FIG. 7, the EEPROM 23 stores the number 1101 of titles to be copied and the titles # 1 to #M.
And copy history information 1102 of the same. The copy history information 1102 for each title includes the title identification information 110
3, song number 1104, and attribute information 1105 of songs # 1 to #L. Hereinafter, these items will be described.

The number of titles 1101 indicates the number of titles to be copied, and takes an integer value from 0 to 256. That is, the number of titles copied using the drive device 2 is recorded. In the present embodiment, a maximum of 256
It is assumed that the duplication history can be recorded up to the title, but it is not limited to this upper limit, and it goes without saying that the upper limit of the number of recordable titles may be increased with an increase in memory capacity.

Next, the copy history information 1102 for each title will be described. Title identification information 1103
Is a copy of the title name 1006 in the DVD-Audio, and indicates unique information given to each title. The number of songs 1104 is information indicating the number of songs included in the corresponding title, and takes an integer value of 1 or more and 99 or less.
In this embodiment, it is assumed that up to 99 songs are included in one title, but the number of songs may be freely changed according to the storage capacity of the EEPROM 23.

The attribute information 1105 of the songs # 1 to #L includes content identification information 1106, a title key, a disk key for DVD-Audio, medium identification information 1107, and the number of copies 110
8. The content identification information 1106 is a copy of the ISRC information 1010 in DVD-Audio described above,
Indicates unique information for each song content.

The title key is an encryption key for decrypting the content. In order to decrypt the title key, the disc key is
This is the encryption key recorded in D-Audio. The title key and the disc key stored in the EEPROM 23 are deleted by the control microcomputer 26 when the number of times of copying reaches the upper limit. It goes without saying that the title key and the disk key may be deleted each time the drive device performs the duplication. In the latter case, the original DVD-Au
The operator is required to prepare the dio and read the title key and disc key, so even if the number of copies is within the limit, only the original DVD-Audio can be copied by the holder, and the original It is possible to prevent the content from being copied by a person who does not have DVD-Audio.

The medium identification information 1107 is identification information unique to a DVD-RAM to which content is copied. The number of times of copying 1108 is information indicating the number of times the corresponding content has been copied using the drive device 2, and takes an integer value of 0 or more. FIG. 8 will be described as an example of a specific example of the attribute information for each content described above. FIG. 8 is a diagram showing an example of attribute information of music content. In FIG. 8, the content identification information is "JPABC9812345" to "JPABC981".
2349 ”is a DVD with media identification information of“ M001A ”
-Recorded in RAM and the content identification information is "JPABC980
It can be seen that the contents of “1234” to “JPABC9801236” have the medium identification information recorded on the DVD-RAM of “M346B”. Referring to the number of duplications, it can be seen that the duplication is performed once.

Next, how the hard disk device 5 stores contents read from DVD-Audio when copying from DVD-Audio to DVD-RAM will be described. FIG. 9 is a diagram showing a directory structure in the hard disk device 5. In the "directory \ _user" where three directories such as \ _user, \ _temp, and \ _trash can are formed under the root directory, a read-only format data file and a readable format data file are stored. I have.

The "directory \ _temp" is DVD-Audio
Is a directory for managing a file (temporary storage format file) for temporarily storing the content on the hard disk device 5 when copying the content from the DVD-RAM to the DVD-RAM. And an attribute information table. The contents in the temporary storage format may be stored in a directory as a hidden file. In this case, since the operator cannot detect the presence of the content converted to the temporary storage format, the content converted to the temporary storage format is not illegally analyzed.

Next, the attribute information table stored in "directory \ _temp" will be described. The attribute information table includes file path information indicating the location of a file corresponding to the digital content in the hard disk device 5, file attributes indicating the attribute of the file storing the digital content, and digital content stored in the hard disk device 5. Date and time (recording date and time)
Are stored in the hard disk device 5 in a special file format that cannot be referenced or falsified.

FIG. 10 shows an example of the attribute information table.
FIG. 10 is a diagram illustrating an example of the attribute information table. In FIG. 10, the attribute information table includes file path information, file attributes, and recording date and time of each data file. The data file indicated by the file path information "C: \ _ temp \ _xxx.dat" has the file attribute set to the temporary storage attribute. It can be seen that the date and time when this data file was recorded is April 1, 1999.

The data attribute specified by the file path information "C: \ _ user \ _zzz.dat" has a file attribute set to be readable and writable. It can be seen that the date and time when this data file was recorded is March 20, 1999. The data attribute specified by the file path information "C: \ _ Recycle Bin \ _aaa.dat" has its file attribute set to the temporary save attribute timeout. Temporary save attribute timeout means that this data file was once set to the temporary save attribute, but was left unrecorded for a long time without being recorded on DVD-RAM. , Which means that it was stored in the directory "C: \ _ Recycle Bin".

As a conclusion of the first embodiment, in the content copying system realized by the above hardware configuration and data structure, when the content forming the title is copied from DVD-Audio to DVD-RAM. A series of procedures will be described with reference to the flowcharts of FIGS. FIG. 11 and FIG. 12 are flowcharts showing the processing procedure of the drive device at the time of copying content. The processing procedure of this flowchart is described by a machine language instruction, and is set in the control microcomputer 26 as a control program. Therefore, the control subject of this flowchart is the control microcomputer 26, and the operation of the control microcomputer 26 executing the process of this flowchart will be described below.

It is assumed that a portable recording medium is loaded in the drive device by the operator. Then, in step S1, the control microcomputer 26 refers to the lead-in area of the loaded recording medium and determines whether the loaded recording medium is a read-only recording medium (DVD-Audio) or a readable recording medium (DVD-R).
AM) is determined. The loaded recording medium
In the case of DVD-Audio, in step S2, the control microcomputer 26 reads the title key and the disc key from the DVD-Audio from the lead-in area, and in step S3, the title identification information recorded in the DVD-Audio It is determined whether or not the same title identification information exists in the EEPROM 23. If the same title identification information already exists in the EEPROM 23, the processing of this flowchart is ended in order to avoid duplication of the title. If not, the title copy history for the title identification information is determined in step S4. The information is generated in the EEPROM 23, and the process proceeds to a loop process in which a set of steps S5 and S6 is used as a loop control statement. Step S5
Step S6 is a loop control statement that repeats the processing of steps S7 to S12 for all contents constituting the title recorded on DVD-Audio.

Hereinafter, the processing performed on each content by the loop processing will be sequentially described. First, in step S7, it is determined whether or not the copy permission flag is “0” and the copy is permitted by referring to the attribute information of the content. If it is not "0",
It is determined that copying is not permitted, and the process proceeds to step S6 to skip the processes of steps S8 to S12. If “0”, the process proceeds to step S8. In step S8, it is determined whether or not the same content identification information as the content identification information recorded in the DVD-Audio exists in the EEPROM 23. If the content identification information exists in the EEPROM 23, it is determined in steps S9 to S12 to avoid duplicate copying.
The process skips the step and moves to step S6. If not, in step S9, the content is read, output to the host computer, and stored on the hard disk. In the following step S10, the control microcomputer 26 reads out the content identification information from the DVD-Audio, and in step S11, the control microcomputer 26 generates attribute information including the content identification information and sets the attribute information in the copy history information of the EEPROM. In step S12, content identification information, a title key, and a disc key for the content are written in the generated attribute information, and an initial value of the number of times of copying is set. After the above setting, the process proceeds to step S6. The above processing is repeated for all contents constituting the title recorded on the recording medium by the loop control statement consisting of steps S5 to S6.

In the host computer 1, the contents in the temporary storage format output from the drive device 2 are stored in the hard disk device 5. At this time, the host computer 1 registers the file path for the content in the temporary storage format, the temporary storage attribute, and the date and time of storage in the hard disk device 5 in the attribute information table.

When the content converted to the temporary storage format through the above procedure is stored in the hard disk device 5,
Warns you to load DVD-RAM into the drive device early. The reason why such a warning is issued is to prepare the operator to prepare the DVD-RAM disk as soon as possible, since the content stored in the hard disk device 5 in the temporary storage format has a limited storage period.

Here, the warning is given immediately after the reading process from the drive device. However, if the state of the attribute information table is checked and if the content converted to the temporary storage format exists, DVD-RA of the content that has been converted to the temporary storage format
Unless the writing process to M is performed, execution may not be performed.

While the file in the temporary storage format is stored in the host computer 1, the host computer 1 keeps measuring the current time, and the hard disk device 5 stores the file in the temporary storage format for a predetermined time. Is determined. If the predetermined time has elapsed, the file in the temporary storage format is stored in the “directory \ _trash can” as a data file with a time-out temporary storage attribute to erase the file in the temporary storage format.

The file in the temporary storage format converted to the temporary storage format is stored only for a certain period of time. Therefore, the temporary storage format file stored in the hard disk device 5 does not remain for a long period of several days. At this time, the corresponding item may be deleted from the attribute information management table.
The upper limit of the period may be specified by the user.

If the operator has loaded the DVD-RAM into the drive device 2 before the elapse of the predetermined period, the process proceeds from step S1 to step S13, where the DVD-RA is read in step S13.
The medium identification information is read from M, and the process proceeds to step S14. Steps S14 and S15 are loop control statements for repeating a series of processes consisting of steps S16 to S25 for all contents constituting the title stored on the hard disk.

First, in step S16, the control microcomputer 26 determines whether or not the number of content copies in the attribute information is within the range of permission indicated in the copy permission information for the content. If within the range, step S
The process proceeds to step 18 and after. If it is out of the range, it is determined in step S17 whether the medium identification information in the attribute information matches the medium identification information of the copy destination DVD-RAM. This determination is made when the content is copied to the DVD-RAM but the content of the DVD-RAM is erased due to the user's negligence. This is to allow the content on the DVD-RAM to be recovered. If the medium identification information does not match, the process proceeds to step S15.
If the medium identification information matches, the process moves to step S18.
In step S18, the control microcomputer 26
Then, the title key and the disc key are extracted from the attribute information of the content stored in No. 3. In step S19, the control microcomputer 26 causes the authentication / scramble / descramble LSI 25 to decrypt the disk key using the master key and decrypt the title key using the decrypted disk key. Further, in step S20, the control microcomputer 26 causes the authentication / scramble / descramble LSI 25 to encrypt the decrypted title key using the medium identification information, reads the content from the hard disk, and records the content on the DVD-RAM. After that, in step S22, the process waits for the recording to the DVD-RAM to be completed normally. In step S23, the copy destination DVD-RAM is stored in the attribute information.
It is determined whether or not the medium identification information about exists. If not, the number of copies in the attribute information is incremented in step S24, and the medium identification information is written in the attribute information corresponding to the content in step S25. .

On the other hand, if it is determined in step S23 that the attribute information includes the medium identification information of the copy destination DVD-RAM, the DVD-RAM in step S21 is determined.
Is regarded as an exception for recovering the content once recorded on the DVD-RAM, and the recording of step S24-
Step S25 is skipped, and the process proceeds to step S15. The above processing is repeated for all contents stored in the hard disk in steps S15 to S16.

In the DVD-Audio data structure shown in FIG. 5, the permitted number of duplications 1014 is set in the attribute information for each content. A setting may be made for a title, and the number of permitted copies may be checked for each title. Although exceptional copying when the medium identification information matches is permitted for each content, it may be permitted for each title.

It is preferable that the content copy according to the present embodiment be performed by the drive device only when a special instruction is issued from the host computer. The special instruction here is the issuance of the following special read command and special write command by the host computer. The special read command is transmitted to the drive 2 by DVD-Au.
When the dio is loaded, the encrypted content, the title key, and the disc key are read from the DVD-Audio, and the title key and the disc key are separated from the encrypted content and stored in the drive device 2. This is a command for instructing the drive device 2 to output only the encrypted content.

When the DVD-RAM is loaded, the special write command outputs the encrypted content stored by the hard disk device 5 to the drive device 2, and outputs the encrypted content and the title key stored in the drive device 2. When,
This is a command for recording the disc key on the second recording medium. Further, the host computer may be provided with a copy command for continuously executing the special read command and the special write command.

As described above, according to the present embodiment, if there is one drive device having both functions of the reading side and the recording side, and if this is connected to the host computer having the hard disk device 5, the DVD-Audio Content can be copied to DVD-RAM, and content can be copied at low cost without obtaining two drive devices. A copy of the content encrypted with the title key is transmitted from the DVD-Audio to the hard disk drive 5.
The title key is not recorded in the hard disk device 5 of the host computer through reading of the content from the hard disk device 5 and writing of the content from the hard disk device 5 to the second recording medium. That is, since the encryption key is not duplicated, copying from the DVD-Audio to the hard disk device 5 on the host computer side does not correspond to a legitimate “content copy” in the copyright protection method for DVD. Therefore, the hard disk device 5 on the host computer side
Copying from a DVD to a RAM is not a “grandchild copy of content.” Therefore, even if the grandchild copy of content is prohibited by the DVD-Audio standard CCI,
Audio can be copied to DVD-RAM.

(Second Embodiment) In the first embodiment, a DVD-
The drive device stores the content read from the audio in the hard disk device 5 of the host computer in a state of being encrypted with the title key, but in the second embodiment, before storing the content in the hard disk device 5,
An embodiment in which the content encrypted with the title key is once decrypted, encrypted using another encryption key (temporary storage key), output to the host computer, and stored in the hard disk device 5 About. Since the content is encrypted using another encryption key in the hard disk device 5, when reading the content from the hard disk device 5 in loading the DVD-RAM, the hard disk device 5 uses the temporary storage key to encrypt the read content. And then re-encrypt with the title key,
As in the first embodiment, the data is recorded on a DVD-RAM.

As described above, according to the present embodiment, when the content is temporarily stored in the hard disk device 5, the content is encrypted with an encryption key different from the title key. It is possible to reduce the probability that the content is illegally analyzed and the title key is exposed. Although the description has been given based on the above embodiment, it is merely presented as an example of a system in which the best effect can be expected at present. The present embodiment can be modified and implemented without departing from the gist thereof. Representative modified embodiments include the following (a) to (d).

(A) In this embodiment, the processing procedure (FIGS. 11 and 12) of the control microcomputer 26 described with reference to the flowchart is realized by a machine language program, and this is recorded on a recording medium and distributed / sold. May be targeted.
Such a recording medium includes an IC card, an optical disk, a floppy disk, and the like. The machine language program recorded on these is used by being installed in a general-purpose computer. This general-purpose computer sequentially executes the installed machine language programs to realize the functions of the recording apparatus described in the present embodiment.

(B) DVD-Audi as a copy source recording medium
Although o has been described as an example, the present embodiment is not limited by the recording medium, and the same effect can be obtained with a read-only recording medium such as a CD-R0M. Also, a DVD-RAM has been described as an example of a copy destination recording medium, but the present embodiment is not limited to a recording medium, and is a writable recording medium such as a CD-R, MO, and FD. Then, the same effect can be obtained. Further, it can be replaced with a semiconductor memory other than the optical disk.

(C) In the present embodiment, the content to be copied is limited to audio data only. However, data of a combination of these including video data, character data, or audio data is described. It does not matter. (D) In the present embodiment, when duplication is not permitted by the duplication permission flag 1013, or by using the drive device 2, the number of times of duplication recorded in the number of times of duplication of the title or content to be duplicated is recorded. Is performed, the copying is not permitted. However, the copying may be permitted by, for example, deteriorating the number of channels or the bit rate.

[0062]

According to the content copying system of the present invention, when the first recording medium is loaded, the encrypted content and the encryption key are read from the first recording medium, and the read encrypted content is transferred to the host computer. And the encryption key is transferred to the host computer when the first recording medium is loaded and the recordable second recording medium is loaded after the first recording medium is loaded. Since there is provided a drive device including an encrypted content and an encryption key stored in the first means and a second means for recording both in the second recording medium, the functions of the read side and the recording side are provided. If there is one drive device that also has a hard disk drive, and this is connected to a host computer having a hard disk, a valid “controller” is transferred from the first recording medium to the second recording medium. Tents copy "
Content copy can be realized at low cost without obtaining two drive devices. Here, the encrypted content is copied through the delivery of the encrypted content from the first recording medium to the host computer and the delivery of the encrypted content from the host computer to the second recording medium. Is not passed to the host computer. That is, since the transfer of the encryption key is not accompanied, the transfer of the encrypted content from the first recording medium to the host computer does not correspond to the legitimate "content copy" in the DVD copyright protection method.
Therefore, the transfer from the host computer to the second recording medium does not correspond to the “grandchild copy of the content”.
Even if the grandchild copy of the content is prohibited in the CCI of the Audio standard, the copy from the first recording medium to the second recording medium can be performed.

Here, when the encrypted content is delivered to the host computer, the drive device stores the identification information of the content delivered to the host computer, an initial value of the number of copies of the content, and a limit value. Setting means for associating the information with the number of times and storing the information in a secure storage medium, wherein the second means, when a recordable second recording medium is loaded after the first recording medium is loaded, A recording unit that records the encrypted content delivered to the computer and the encryption key on the second recording medium, and an updating unit that updates the number of copies stored in the secure storage medium when the recording is performed by the recording unit. And may be provided. In this case, when the encrypted content is delivered to the host computer and the encrypted content is recorded on the hard disk of the host computer, the number of times of copying is not counted as one, but is counted at the time of recording on the second recording medium. Since the number of times of copying is counted as one, the content can be used on the second recording medium. That is, the user can carry the second recording medium on which the content is recorded and play the content on various devices such as a component-type audio device and a portable audio device.

In this case, the drive unit may be configured to load the second recording medium or a second recording medium different from the second recording medium after the encrypted content is recorded by the recording unit. By comparing the number of times of one-generation copy of the encrypted content set in the secure storage medium in the drive device with the maximum number of times of the encrypted content, the recording of the encrypted content on the second recording medium can be performed. The comparing means for determining whether or not to permit, and the medium identification information unique to the loaded second recording medium are already set in the secure storage medium in the drive device in association with the identification information of the encrypted content. The same identification information judging means for judging whether or not the content has been copied, wherein the recording unit is configured such that the number of one-generation copies of the encrypted content is less than the maximum number of times of the encrypted content. Alternatively, when the same identification information determining means determines that the medium identification information unique to the second recording medium has already been set in the secure storage medium in the drive device, the encrypted content transferred to the host computer is transmitted to the second computer. It may be recorded on a recording medium. In this case, even if the number of copies exceeds the limit number of copies,
If the medium identification information of the copy destination second recording medium is the same as the content whose content was copied in the past, it is determined that the content recorded on the second recording medium has been deleted due to negligence and the content on that recording medium is recovered. To do
Exceptionally, copying from the host computer to the second recording medium can be permitted.

Here, the first means includes an encryption key setting section for taking out a disk key unique to the first recording medium, associating it with the encryption key, and setting the encryption key in a secure storage medium in the drive device. When the second recording medium is loaded, the second means exchanges the encryption key stored in the secure storage medium in the drive device with the encryption key unique to the first storage medium stored in the secure storage medium in the drive device. An encryption key descrambler for decrypting using the disk key, and medium identification information unique to the second recording medium are read, and the encryption key decrypted by the encryption key descrambler is identified as a medium identification unique to the second recording medium. An encryption key scrambling unit for encrypting using the information, and an encryption key recording unit for recording the encryption key encrypted using the medium identification information unique to the second recording medium on the second recording medium. good When recorded on the second recording medium, the encryption key is encrypted with the medium identification information unique to the second recording medium. It can be carried out.

Here, when the first recording medium is loaded, the drive unit holds a reading unit for reading the encrypted content and the encryption key from the first recording medium, and holds a temporary storage key different from the encryption key. And decrypting the encrypted content read from the first recording medium using the encryption key, encrypting the encrypted content using the temporary storage key held by the temporary storage key storage, and transmitting the encrypted content to the host computer. When the first scrambling unit to be delivered and the second recording medium recordable after the first recording medium is loaded, the temporary storage key holding unit holds the encrypted content delivered to the host computer. After decryption using the storage key, a second scramble unit for encrypting the encrypted content using the encryption key, and the second scramble unit encrypts the encrypted content using the encryption key. The issue of content may include a recording unit for recording on the second recording medium. In this case, when the content is temporarily stored in the hard disk device built in the host computer, the content is encrypted with a temporary storage key different from the encryption key used when recording the first recording medium. It is possible to reduce the probability that the content stored in the recording medium is illegally analyzed and the encryption key is exposed.

[Brief description of the drawings]

FIG. 1 is a diagram showing the appearance of DVD-Audio and DVD-RAM.

FIG. 2 is a diagram illustrating a hardware configuration of a content copying system.

FIG. 3 is a diagram showing an internal configuration of a content copying system.

FIG. 4A to FIG. 4E read encrypted content from DVD-Audio to a hard disk device 5 and read DVD-RAM from the hard disk device 5;
FIG. 4 is a diagram showing a state in which encrypted content is written to a storage device.

FIG. 5 is a diagram showing a data structure of a read-only DVD-Audio.

FIG. 6 is a diagram showing an interactive screen for accepting a content copy instruction and a content reproduction instruction.

FIG. 7 is a diagram showing a data structure of title duplication history information for each title.

FIG. 8 is a diagram showing an example of attribute information of music content.

FIG. 9 is a diagram showing a directory structure in the hard disk device 5.

FIG. 10 is a diagram illustrating an example of an attribute information table.

FIG. 11 is a flowchart illustrating a processing procedure of the drive device when copying content.

FIG. 12 is a flowchart showing a processing procedure of the drive device when copying content.

FIG. 13A is a diagram illustrating a content reproduction system in which a DVD-Audio drive device and a content decoding device are connected. (B) a drive device (read-side drive device) for reading content from DVD-Audio, and a DV
FIG. 1 is a diagram illustrating a content copy system in which a drive device (recording drive device) that records content in a D-RAM is connected.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Host computer 2 Drive device 3 Display 4 Keyboard 5 Hard disk device 6 MPEG decoder card 7 Host CPU 8 Bus I / F unit 9 Memory 10 ATAPI I / F unit 12 PCI I / F unit 13 Authentication / descramble LSI 14 Audio decoder 15 D / A converter 17 Spindle motor 18 Pickup 19 Preamplifier unit 20 Error correction unit 21 ATAPI I / F unit 22 Servo unit 23 EEPROM 25 Authentication / scramble / descramble LSI 26 Control microcomputer 75 Cartridge 76 Shutter 101 Disk access unit 102 Bus authentication unit 103 Bus authentication unit 104 Descrambler 105 Audio decoder 111 Disk access unit 112 Disk access unit 113 Bus authentication unit 114 Bus authentication unit 115 Copy permission control unit 116 Copy permission control unit 1 01 Lead-in area 1002 Volume area 1003 Lead-out area 1004 Title management information 1005 Title 1006 Title name 1007 Number of songs 1008 Attribute information 1009 Song content 1010 ISRC information 1011 Song name 1012 Singer name 1013 Copy permission flag 1014 Copy permission number 1015 Record address 1101 Title Number 1102 Copy history information 1103 Title identification information 1104 Number of songs 1105 Attribute information 1106 Content identification information 1107 Medium identification information 1108 Number of copies

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shunji Harada 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. 72) Inventor Shoichi Aoyama 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Yukako Otani 1006 Oji Kadoma Kadoma City, Osaka Pref. 1006 Kadoma, Kadoma City Matsushita Electric Industrial Co., Ltd. F-term (reference)

Claims (27)

[Claims] 1. A content copying system including a host computer and a drive device, which realizes one-generation copying but prohibits copying after two-generation copying, wherein the first recording medium is loaded when the first recording medium is loaded. Read the encrypted content and the encryption key from the
For the encryption key, first means for storing the encrypted content inside the encrypted content device; and, when the second recording medium that can be recorded is loaded after the first recording medium is loaded, the encrypted content transferred to the host computer. And a second means for extracting the encryption key stored in the first means and recording the two in a second recording medium. 2. The first recording medium records identification information of the recorded encrypted content and limit number information indicating how many times one generation copy of the encrypted content is permitted. When the encrypted content is delivered to the host computer, the drive device includes: a secure storage medium; identification information of the content delivered to the host computer; an initial value of the number of copies of the content; And a setting means for storing the data in a secure storage medium in association with the second recording medium. When the second recordable medium is loaded after the first recording medium is loaded, the host computer A recording unit for recording the transferred encrypted content and the encryption key on the second recording medium, and secure recording by the recording unit. 2. The content copying system according to claim 1, further comprising: an updating unit that updates the number of times of copying stored in the storage medium. 3. When the encrypted content transferred to the host computer is recorded on the second recording medium by the recording unit, the setting unit corresponds to the identification information of the encrypted content on the secure storage medium in the drive device. 3. The content duplication system according to claim 2, wherein the medium identification information unique to the second recording medium is set in a secure storage medium in the drive device. 4. The drive device according to claim 1, wherein after the encrypted content is recorded by a recording unit, the second recording medium or a second recording medium different from the second recording medium is loaded. By comparing the number of times of one-generation copy of the encrypted content set in the secure storage medium in the drive device with the maximum number of times of the encrypted content, the recording of the encrypted content on the second recording medium can be performed. Comparing means for determining whether or not to permit, and medium identification information unique to the loaded second recording medium are already set in the secure storage medium in the drive device in association with the identification information of the encrypted content. The same identification information determining means for determining whether or not the encrypted content, the recording unit, if the number of times of one generation copy of the encrypted content is less than the limit number of the encrypted content, The encrypted content transferred to the host computer when the same identification information determination means determines that the medium identification information unique to the second recording medium has already been set in the secure storage medium in the drive device. 4. The contents duplication system according to claim 3, wherein the contents are recorded on a recording medium. 5. The method according to claim 1, wherein the encryption key is encrypted using a disk key unique to the first recording medium and recorded on the first recording medium, and wherein the first means includes a disk key unique to the first recording medium. And an encryption key setting unit that sets the secure storage medium in the drive device in association with the encryption key, wherein the second means, when the second recording medium is loaded, secures the secure storage in the drive device. An encryption key descrambler for decrypting the encryption key stored in the storage medium using a disk key unique to the first storage medium stored in a secure storage medium in the drive device; An encryption key scrambler for reading the unique medium identification information and encrypting the encryption key decrypted by the encryption key descrambler using the medium identification information unique to the second recording medium; Medium Content replication system according to claim 1, characterized in that it comprises an encryption key recording unit for recording the encryption key encrypted in the second recording medium by using the identification information. 6. The host computer, when the encrypted content is delivered to the host computer, a warning unit that warns an operator to perform an operation of loading a second recording medium into a drive device early, and a current time. Elapse time determination means for determining whether a predetermined time has elapsed since the delivery of the encrypted content to the host computer by referring to the current time measured by the time measurement means; and 2. The content copying system according to claim 1, further comprising a deletion unit that deletes the content when the content is copied. 7. A content duplication system that includes a host computer and a drive device and realizes one-generation copy, but prohibits after the second-generation copy, wherein the first recording medium is loaded when the first recording medium is loaded. A reading unit that reads an encrypted content and an encryption key from the storage unit; a temporary storage key holding unit that holds a temporary storage key different from the encryption key; and an encryption key that reads the encrypted content read from the first recording medium. After decryption, a first scrambler that encrypts the data using the temporary storage key held by the temporary storage key holder and transfers the encrypted data to the host computer, and a second recording medium that can be recorded after the first recording medium is loaded are included. When loaded, the encrypted content delivered to the host computer is decrypted using the temporary storage key held by the temporary storage key holding unit, and then decrypted using the encryption key. A drive device having a second scramble unit for encrypting the encrypted content, and a recording unit for recording, on a second recording medium, the encrypted content encrypted by the second scramble unit using the encryption key. Characteristic content replication system. 8. A content duplication system that includes a host computer and a drive device and realizes one-generation copy, but prohibits the second and subsequent copies. A title comprising a plurality of encrypted contents and a title key, and transferring the title to the host computer, and storing the title key in the title device, after the first recording medium is loaded, When a recordable second recording medium is loaded, a second means for taking out the title delivered to the host computer and the title key stored in the first means and recording both on the second recording medium is provided. A content duplication system comprising a drive device. 9. The first recording medium records identification information of a recorded title in association with limit number information indicating how many times one generation copy of the title is permitted. The drive device includes a secure storage medium, and when the title is delivered to the host computer, identification information of the content delivered to the host computer,
Setting means for associating an initial value of the number of times of copying of the content with limit information and storing the information in a secure storage medium, wherein the second means is capable of recording after the first recording medium is loaded When the second recording medium is loaded, a recording unit that records the encrypted content delivered to the host computer and the encryption key on the second recording medium; 9. The content copying system according to claim 8, further comprising: an updating unit that updates the stored number of copies. 10. When the title transferred to the host computer is recorded on the second recording medium by the recording unit, the setting unit associates the title with the identification information of the title in a secure storage medium in the drive device, and 10. The contents duplication system according to claim 9, wherein medium identification information unique to the second recording medium is set in a secure storage medium in the drive device. 11. The drive device according to claim 1, wherein after the title is recorded by the recording unit, when the second recording medium or a second recording medium different from the second recording medium is loaded, Comparing means for comparing the number of one-generation copies of the title set on the secure storage medium in the apparatus with the limit number of the title; and medium identification information unique to the loaded second recording medium, The same identification information determining means for determining whether or not the information is already set in the secure storage medium in the drive device in association with the information, When the number of times is less than the limit number, or when the same identification information determination unit determines that the medium identification information unique to the second recording medium is already set in the secure storage medium in the drive device. Content replication system of claim 10, wherein the recording the title handed over if the relevant host computer to a second recording medium. 12. The title key is encrypted using a disc key unique to the first recording medium and recorded on the first recording medium, and the first means includes a disc key unique to the first recording medium. A title key setting unit for extracting a key from the storage medium and setting the key in a secure storage medium in the drive device in association with the title key, wherein the second means is stored in the secure storage medium in the drive device When the second recording medium is loaded, a title key descrambler for decrypting the current title key using a disk key unique to the first recording medium stored in a secure storage medium in the drive device, The medium identification information unique to the second recording medium is read out from the second recording medium, and the title key decrypted by the title key descrambling unit is read out from the second recording medium.
A title key scrambling unit for encrypting using the medium identification information unique to the recording medium, and a title key recording for recording the title key encrypted using the medium identification information unique to the second recording medium on the second recording medium The content copying system according to claim 8, further comprising a unit. 13. A drive device that can be connected to a host computer and realizes one-generation copy, but prohibits after the second-generation copy. When the first storage medium is loaded, encryption is performed from the first storage medium. First means for reading out the content and the encryption key, delivering the encrypted content to the host computer, and storing the encryption key in the encrypted content device; and a first means capable of recording after the first recording medium is loaded. (2) When the recording medium is loaded, a second means for taking out the encrypted content delivered to the host computer and the encryption key stored in the first means and recording both on the second recording medium is provided. Characteristic drive device. 14. The first recording medium records identification information of the recorded encrypted content in association with limit number information indicating how many times one generation copy of the encrypted content is permitted. When the encrypted content is delivered to the host computer, the drive device includes: a secure storage medium; identification information of the content delivered to the host computer; an initial value of the number of copies of the content; And a setting means for storing the data in a secure storage medium in association with the second recording medium. When the second recordable medium is loaded after the first recording medium is loaded, the host computer A recording unit for recording the transferred encrypted content and the encryption key on the second recording medium; 14. The drive device according to claim 13, further comprising: an update unit configured to update the number of copies stored in the storage medium. 15. When the encrypted content delivered to the host computer is recorded on the second recording medium by the recording unit, the setting means corresponds to the identification information of the encrypted content in the secure storage medium in the drive device. 15. The drive device according to claim 14, wherein medium identification information unique to the second recording medium is set in a secure storage medium in the drive device. 16. The drive device according to claim 1, wherein after the encrypted content is recorded by a recording unit, the second recording medium or a second recording medium different from the second recording medium is loaded. By comparing the number of one-generation copies of the encrypted content set on the secure storage medium in the drive device with the limit number of the encrypted content, the recording of the encrypted content on the second recording medium can be performed. Comparing means for determining whether or not to permit, and medium identification information unique to the loaded second recording medium are already set in a secure storage medium in the drive device in association with the identification information of the encrypted content. The same identification information judging means for judging whether or not the content has been copied. Alternatively, when the same identification information determination unit determines that the medium identification information unique to the second recording medium has already been set in the secure storage medium in the drive device, the encrypted content transferred to the host computer is transferred to the second storage medium. The drive device according to claim 15, wherein the drive device records the information on a recording medium. 17. The method according to claim 17, wherein the encryption key is encrypted using a disk key unique to the first recording medium and recorded on the first recording medium, and wherein the first means includes a disk key unique to the first recording medium. And an encryption key setting unit that sets the secure storage medium in the drive device in association with the encryption key, wherein the second means, when the second recording medium is loaded, secures the secure storage in the drive device. An encryption key descrambler for decrypting the encryption key stored in the storage medium using a disk key unique to the first storage medium stored in a secure storage medium in the drive device; An encryption key scrambler for reading the unique medium identification information and encrypting the encryption key decrypted by the encryption key descrambler using the medium identification information unique to the second recording medium; What Drive device according to claim 13, characterized in that it comprises an encryption key recording unit for recording the encryption key encrypted in the second recording medium by using the body identification information. 18. A drive device which can be connected to a host computer and realizes one-generation copy, but prohibits after the second-generation copy. When the first storage medium is loaded, encryption is performed from the first storage medium. A reading unit that reads a content and an encryption key; a temporary storage key holding unit that holds a temporary storage key different from the encryption key; A first scrambling unit that encrypts the data using the temporary storage key held by the temporary storage key holding unit and transfers the encrypted data to the host computer; Then, after decrypting the encrypted content delivered to the host computer using the temporary storage key held by the temporary storage key holding unit, the encrypted content is decrypted using the encryption key. A second scrambling unit that encrypts the drive device characterized by comprising an encrypted content encrypted using the encryption key by the second scrambler recording section for recording on the second recording medium. 19. A drive device that can be connected to a host computer and realizes one-generation copy but prohibits after the second-generation copy. First means for reading out the title composed of the encrypted content and the title key, transferring the title to the host computer, and storing the title key inside the title device; When the second recording medium is loaded, a second means for taking out the title delivered to the host computer and the title key stored in the first means and recording both on the second recording medium is provided. Drive device. 20. The first recording medium, wherein identification information of a recorded title is recorded in association with limit number information indicating how many times one generation copy of the title is permitted. The drive device has a secure storage medium, and when the title is delivered to the host computer, identification information of the content delivered to the host computer,
Setting means for associating an initial value of the number of copies of the content with limit information and storing the information in a secure storage medium, wherein the second means is capable of recording after the first recording medium is loaded. When the second recording medium is loaded, a recording unit that records the encrypted content delivered to the host computer and the encryption key on the second recording medium, and when the recording unit performs recording, stores the information on a secure storage medium. 20. The drive device according to claim 19, further comprising: an update unit that updates the number of copies performed. 21. When the title transferred to the host computer is recorded on the second recording medium by the recording unit, the setting unit associates the title with the identification information of the title in a secure storage medium in the drive device, and 21. The drive device according to claim 20, wherein medium identification information unique to the second recording medium is set in a secure storage medium in the drive device. 22. The drive device according to claim 19, wherein after the title is recorded by the recording unit, when the second recording medium or a second recording medium different from the second recording medium is loaded, Comparing means for comparing the number of one-generation copies of the title set in the secure storage medium in the apparatus with the limit number of the title; and medium identification information unique to the loaded second recording medium, the title identification information The same identification information determining means for determining whether or not the information is already set in the secure storage medium in the drive device in association with the information, wherein the recording unit determines that the number of one-generation copies of the title is When the number of times is less than the limit number, or when the same identification information determination unit determines that the medium identification information unique to the second recording medium is already set in the secure storage medium in the drive device. Recording the title handed over if the relevant host computer to a second recording medium drive apparatus according to claim 21, wherein. 23. The title key is encrypted using a disc key unique to the first recording medium and recorded on the first recording medium, and the first means includes a disc key unique to the first recording medium. A title key setting unit for extracting a key from the storage medium and setting the key in a secure storage medium in the drive device in association with the title key, wherein the second means is stored in a secure storage medium in the drive device. When the title key descrambler decrypts the title key using a disc key unique to the first recording medium stored in a secure storage medium in the drive device, and the second recording medium is loaded, The medium identification information unique to the second recording medium is read out from the second recording medium, and the title key decrypted by the title key descrambling unit is read by the second key.
A title key scrambling unit for encrypting using the medium identification information unique to the recording medium, and a title key recording for recording the title key encrypted using the medium identification information unique to the second recording medium on the second recording medium 20. The drive device according to claim 19, further comprising a unit. 24. A host computer for controlling a drive device to realize one-generation copy but to prohibit copy after two-generation copy, wherein when the drive device is loaded with a first recording medium, encryption is performed from the first recording medium. Read the encrypted content and the encryption key,
The encryption key is separated from the encrypted content and stored in the drive device, and first means for instructing the drive device to output only the encrypted content, and the content output from the drive device are stored. A storage unit, when a recordable second recording medium is loaded after the first recording medium is loaded, an encrypted content stored by the storage unit is output to a drive device, and the content
A second means for recording the encryption key stored in the drive device on a second recording medium. 25. A warning means for warning an operator to perform an operation of loading a second recording medium into a drive device early when the encrypted content is stored by the storage means, Timer means for measuring the current time; elapsed time determination means for determining whether a predetermined time has elapsed since the storage of the encrypted content in the storage means by referring to the current time clocked by the clock means; and predetermined time 25. The host computer according to claim 24, further comprising: a deletion unit that deletes the content when the time has elapsed. 26. A computer-readable recording medium storing a program for controlling the host computer to realize one-generation copying when the host computer is connected to the drive device but to prohibit the second-generation copying and thereafter. When the first recording medium is loaded into the drive device, the encrypted content and the encryption key are read from the first recording medium,
The encryption key is separated from the encrypted content and stored in the drive device, and a first step of instructing the drive device to output only the encrypted content is provided. After the first recording medium is loaded, When the recordable second recording medium is loaded, the encrypted content output in the first step is output to the drive device, and the content and the encryption key stored in the drive device are stored in the second storage medium. A computer-readable recording medium, which records a program for causing a computer to perform a procedure consisting of a second step of recording on a computer. 27. A duplication method for controlling a host computer to realize one-generation copy when a host computer is connected to a drive device, but to prohibit the second generation copy and thereafter, wherein the drive device has a first copy. When the recording medium is loaded, the encrypted content and the encryption key are read from the first recording medium,
The encryption key is stored inside the drive,
A first step of instructing the drive device to output only the encrypted content; and, after the first recording medium is loaded, when a recordable second recording medium is loaded, the encryption output in the first step is performed. And a second step of outputting the encrypted content to a drive device and recording the content and an encryption key stored in the drive device on a second recording medium.