JP3327894B2 - Data management apparatus, data management method, and recording medium recording data management program - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for distributing digital works, and more particularly to a technique for protecting digital works.

[0002]

2. Description of the Related Art In recent years, digitization of information has been advanced, and when a digital work expressed using multimedia is provided to a general user, a CD in which the digital work is recorded is used.
A method of distributing a recording medium such as a DVD or a CD-ROM and a method of distributing a digital work via a network are often used.

[0003] In the former case, a general user can mount a distributed CD on a personal computer and enjoy playing digital works recorded on the CD, for example, music. In the latter case, using the communication function of the personal computer, the digital work is downloaded to each personal computer and used. As one example, a music distribution system using a content control method is called “Music Distribution Matters” (Nikkei Electronics No. 738, PP87-111, Nikkei BP, 199).
(Issued March 8, 2009). In this content control method, a file A composed of encrypted music content and a file B composed of control information indicating permission / non-permission of reproduction and copying of the file A and a decryption key of the file A are transmitted via a network. At the time of music reproduction, it is determined whether reproduction or copying of the file A is possible using the control information included in the file B.

According to such a music distribution system, by using control information indicating permission / non-permission of reproduction / copying, etc., a certain restriction is imposed on reproduction / copying of contents, whereby a copyrighted work can be protected from unauthorized use. Can be protected.

[0005]

However, in the conventional music distribution system, the reproduction / copy permission / reproduction included in the distribution contents distributed via the network is performed.
The copyrighted work can be protected by applying certain restrictions to the reproduction or copying of the copyrighted work using control information indicating non-permission, etc., but distributed via a network without the control information added. Digital works such as music recorded on CDs and other contents to be reproduced are generally not encrypted, and control information indicating permission / non-permission of reproduction and copying is not added. Using such a method, there is a problem that a digital work recorded on the CD or the like can be reproduced or copied without restriction, and the digital work cannot be sufficiently protected.

The present invention has been made to solve the above problems.
In addition to protecting the distribution contents distributed via the network, contents, CDs and CD-ROMs distributed via the network without adding the control information
It is an object of the present invention to provide a data management device, a data management method, and a recording medium recording a data management program for protecting a digital work recorded on a recording medium such as the above in the same manner as the distribution content.

[0007]

In order to achieve the above object, the present invention relates to a data management device for managing a distributed digital work and rights information in association with each other. For each type indicating the format, a copyright information storage unit that previously stores rights information including at least reproduction right information indicating whether reproduction of the digital work is permitted or not, a copyrighted work storage unit, A work obtaining means for externally obtaining a digital work to which rights information is not added, a format determining means for determining a type indicating a data format of the obtained digital work, and a data format of the obtained digital work. Rights information reading means for reading rights information corresponding to the indicated type from the rights information storage means, and a work for writing the obtained digital work to the work storage means And write means, said in association with the digital work written in the work memory means, characterized in that it comprises a rights information writing means for writing the right information read in the work memory means.

Here, the copyrighted work writing means further comprises:
The read right information may be added to the digital work written in the work storage means. Here, the rights information further includes recording rights information, and the recording rights information indicates whether to permit check-out, and the check-out is to externally output the digital work and the corresponding reproduction right information. May be configured to be copied to

Here, the recording right information may include a check-out upper limit number, and the check-out upper limit number may indicate an upper limit of the number of check-outs. Here, the right information further includes moving right information, and the moving right information is configured to indicate whether to permit moving the digital work and the corresponding right information to the outside. Is also good.

Here, the data management device further comprises:
The digital work may be configured to read out the rights information corresponding to the digital work from the work storage means, and to reproduce the digital work read out based on the read rights information.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION First Embodiment A data management apparatus 100 according to one embodiment of the present invention will be described. As shown in FIG. 1, the data management device 100 is connected to a network 20 such as the Internet or a cable TV via a communication line 10. A Web server 30 that supplies music information including content related to music is connected to the network 20. The data management device 100 is a Web server 3
The music information is acquired from 0 and the acquired music information is stored therein. In addition, music information including content related to music is read from the CD 300, and the read music information is stored therein. Further, the data management device 100 reproduces the stored music information and outputs it through the speaker 154.

In this way, the user can enjoy music. 1.1 Configuration of Data Management Apparatus 100 As shown in FIG. 2, the data management apparatus 100 includes a control method storage table 101 for each data format, a right management table 102 for each data format, a data format determination unit 103, a data registration unit 104, It comprises a data management table 105 and a data storage unit 106.

As shown in FIG. 3, the data management device 100 includes a microprocessor 151 and a RAM.
(Random Access Memory) 15
2, a display 153, a speaker 154, a hard disk 156, a keyboard 157, a communication unit 158, and a reading unit 159.
Connected to. The hard disk 156 stores a computer program, and stores the data format
03 and the data registration unit 104
The functions are achieved by executing the computer program stored in the microprocessor 151 by the microprocessor 151. Data format control method storage table 10
1. The rights management table 102 for each data format, the data management table 105, and the data storage unit 106 are specifically constituted by a hard disk 156. (Data format determination unit 103) Data format determination unit 103
Includes a communication unit 158 connected to an external Web server 30 via a network 20 such as the Internet or a cable TV, and includes a reading unit 159 for recording media such as CDs and DVDs.

The data format discriminating unit 103 extracts the distribution content from the external Web server 30 based on a user's instruction. The distribution content includes a file A and a file B. File A includes encrypted content such as encrypted music content. The file B includes right information indicating permission / non-permission of reproduction, recording, and movement of the file A, an encryption method for encrypting the encrypted content, and a decryption key for the encrypted content. The data format determination unit 103 outputs the extracted distribution content, the file name of the file A, and the determination information indicating the distribution content to the data registration unit 104.

The data format discriminating unit 103 reads unencrypted contents from the mounted CD or DVD based on a user's instruction, and reads the unencrypted contents and the CD or DVD. The determination information is output to the data registration unit 104. Here, the information indicating permission / non-permission of reproduction is also referred to as reproduction right information, and indicates whether reproduction of the content having the reproduction right information is permitted.

The information indicating permission / non-permission of recording is
Also referred to as recording right information, it indicates whether checkout is permitted or not. The recording right information includes a checkout upper limit number indicating the number of times that checkout is permitted. Here, the check-out means that the content and the reproduction right for reproducing the content are copied from the device having the content to another device, and in the device having the content,
This means reducing the maximum number of checkouts by one. Check-in refers to returning the right to play back content from another device to the original device and increasing the maximum number of check-outs by one in the original device. At this time, in the other device, the copied content becomes unusable.

Information indicating permission / non-permission of movement is
Also referred to as transfer right information, it indicates permission / disapproval of transfer.
Here, “moving” means that the content and all rights information are copied from the device having the content to another device, and the content is permanently disabled in the original device. (Data Format Control Method Storage Table 101) As shown in FIG. 4, the data format control method storage table 101 includes a data format 201, a data storage method 202, an encryption method 203, an encryption key creation method 204, A plurality of sets of the right management method 205 and the right existence information 206 are stored.

The data format 201 indicates whether the content is a content extracted via a network,
This indicates whether the content is read from a recording medium such as D or DVD. “Distributed content” indicates content extracted via the network, and “C
“D” and “DVD” indicate contents read from a CD and a DVD, respectively.

The data storage method 202 is a script indicating a method for processing content. Data format 2
When 01 is “CD”, the data storage method 202 includes the following script. If the data format 201 is "DV
In the case of "D", the data storage method 202 is the same as the script shown below. (Step 1) An encryption key is created by using an encryption key creation method 204 corresponding to the data format 201 of “CD”. (Step 2) Using the created encryption key, the content read from the CD is encrypted by the encryption method 203 corresponding to the data format 201 of “CD” to generate encrypted content. (Step 3) Copy the generated encrypted content to file A
Is written in the data storage unit 106. (Step 4) According to the script recorded in the right management method 205, the right information 222 corresponding to the data format 221 of “CD” is read from the right management table 102 by data format. (Step 5) According to the script recorded in the right management method 205, the data ID 251 and the encryption information 25
2. Write the rights information 253 and the file name 254 into the data management table 105. Further, the encryption information 252 and the right information 253 are stored as a file B in the data storage unit 10.
Write to 6. Here, the data ID 251 is a unique identifier generated for each content of the CD. The encryption information 252 includes an encryption method 261 and an encryption key 262. The encryption method 261 is the encryption method determined in step 2. The encryption key 262 is the encryption key created in Step 1. The file identifier of the file name 254 is a unique identifier generated for each of the contents. The right information 253 is the right information 222 read from the right management table 102 by data format.

When the data format 201 is "distribution content", the data storage method 202 includes the following script. (Step 1) The distribution content extracted via the network is written in the data storage unit 106. (Step 2) Data ID 251, encryption information 252,
The right information 253 and the file name 254 are written in the data management table 105. Here, the data ID 251 is the file name of the file A extracted via the network. The encryption information 252 includes an encryption method 261 and an encryption key 262. The encryption method 261 is an encryption method included in the file B extracted via the network. The encryption key 262 is a decryption key included in the file B extracted via the network. The right information 253 is right information extracted via the network. The file name 254 is the file name of the file A extracted via the network.

When the data format 201 is “CD” or “DVD”, the encryption method 203 uses “CD” or “DV”.
D "indicates the encryption method used when encrypting the content read from" D ". According to the example shown in FIG.
When 1 is “CD” or “DVD”, the encryption method is RS
A. When the data format 201 is “distribution content”, the encryption method 203 is not stored.

The encryption key creation method 204 includes the encryption method 203
A method for creating an encryption key used in the method will be described. According to the example shown in this figure, the data format 201 is “CD” or “DV”.
In the case of "D", the encryption key generation method 204 is a random number generation. Further, when the data format 201 is “DVD”, the length of the music recorded at the head of the DVD is used as a seed for generating random numbers. When the data format 201 is “distribution content”, the encryption key creation method 204 is not stored.

The right management method 205 is a script related to right information. When the data format 201 is “CD”, the right management method 205 includes the following script. Even when the data format 201 is “DVD”,
The rights management method 205 is the same as the script shown below. (Step 1) The right information 222 of the right management table 102 for each data format is read, and the data management table 10 is read.
Write 5

When the data format 201 is “distribution content”, the right management method 205 is not stored. The right presence information 206 indicates whether right information is added. When the right presence information 206 is “0”, it indicates that the right information is not added, and when “1”,
Indicates that the right information has been added. In the example of the control method storage table 101 for each data format shown in FIG. 4, when the data format 201 is “CD” or “DVD”, the right information is not added, so the right existence information 206 is “0”. Yes, data format 201 is "distribution content"
In this case, the right information is added, so the right existence information 206 is “1”. (Rights Management Table 102 by Data Format) The rights management table 102 by data format stores a plurality of pairs of a data format 221 and right information 222 as shown in FIG.

The data format 221 is composed of “CD” or “DVD” indicating that the content is read from a recording medium such as a CD or DVD. Data format 221
Does not include “distribution content”. Rights information 222
Are the reproduction right 231, the recording right 232, and the move right 233.
Consists of The reproduction right 231, the recording right 232, and the move right 233 indicate whether the user is permitted to reproduce, record, and move the content. "Possible"
Indicates permission of reproduction, recording, and movement of the content, and “impossible” indicates that reproduction, recording, and movement of the content are not permitted. (Data Management Table 105) Data Management Table 10
5 stores a plurality of sets of a data ID 251, encryption information 252, right information 253, and file name 254, as shown in FIG.

Each set corresponds to each content stored in the data storage unit 106 on a one-to-one basis. Data ID
251 is an identifier for identifying each content. The encryption information 252 includes an encryption method 261 and an encryption key 262. The encryption method 261 is an encryption method used when the content identified by the data ID 251 is encrypted. The encryption key 262 is an encryption key used when the content identified by the data ID 251 is encrypted.

The right information 253 includes a reproduction right 271, a recording right 272, and a move right 273. The reproduction right 271, the recording right 272, and the move right 273 indicate whether the user is permitted to reproduce, record, and move the content identified by the data ID 251.
"Available" indicates permission of reproduction, recording, and movement of the content, and "impossible" indicates that reproduction, recording, and movement of the content are not permitted.

The file name 254 is stored in the data storage unit 106
And the data ID 251
Is the file name of the file containing the content identified by. The file name 254 is configured by combining a file identifier, a separator “.”, And a file type “dat”. The file identifier of the file name 254 has the same identifier as the data ID 251.

In this figure, a set 281 is an example when the data format is "CD", and a set 282 is an example when the data format is "music content". (Data registration unit 104) The data registration unit 104 sends the distribution content and the file A
, And determination information indicating that the content is distribution content. In addition, the data registration unit 104 receives the unencrypted content and the discrimination information indicating a CD or a DVD.

When the data registration unit 104 receives, from the data format determination unit 103, the determination information indicating that the content is a distribution content, the data format control method storage table 10
1, a data storage method 202 corresponding to the data format 201 that is “distribution content” is extracted, and a script recorded in the extracted data storage method 202 is executed.

When the data registration unit 104 receives the discrimination information indicating “CD” from the data format discrimination unit 103, the data registration unit 104 corresponds to the data format 201 “CD” from the data format control method storage table 101. The data storage method 202 to be extracted is extracted, and the script recorded in the extracted data storage method 202 is executed. The same applies to the case where the data registration unit 104 receives the determination information indicating that the data is “DVD”. (Data storage unit 106) The data storage unit 106 stores content in the same file format as the distribution content composed of the file A and the file B. 1.2 Operation of Data Management Apparatus 100 The operation of the data management apparatus 100 will be described with reference to the flowchart shown in FIG.

The data format determining unit 103 extracts distribution contents from the outside,
The file name of the file A and the determination information indicating the distribution content are output to the data registration unit 104, or the data format determination unit 103
Read the unencrypted content from the VD, and read the unencrypted content and the CD or D
The determination information indicating the VD is output to the data registration unit 104,
The data registration unit 104 sends the data
The distribution content, the file name of the file A, and the identification information indicating the distribution content are received, or the data registration unit 104 receives the unencrypted content and the identification information indicating the CD or DVD. (Step S101).

When the data registration unit 104 receives the discrimination information indicating the distribution content from the data format discrimination unit 103 (steps S103 to S104), the data registration unit 104 reads “distribution content” from the data format control method storage table 101. A data storage method 202 corresponding to a certain data format 201 is extracted, and the extracted data storage method 202
By executing the script recorded in the file A, the file A including the encrypted content extracted via the network is written into the data storage unit 106 (step S105), and the data ID 251, the encryption information 252,
The right information 253 and the file name 254 are written in the data management table 105 (step S106).

When the data registration unit 104 receives the discrimination information indicating "CD" from the data format discrimination unit 103 (step S103), the data registration unit 104 reads "CD" from the data format control method storage table 101. Data format 2
01 is retrieved, and the script recorded in the retrieved data storage method 202 is executed.
In step S111, an encryption key is created by using the encryption key creation method 204 corresponding to “01”, and the CD is created by using the encryption key created by the encryption method 203 corresponding to the data format 201 of “CD”. Encrypts the content read out from the server to generate an encrypted content (step S1).
12), the generated encrypted content is stored in the data storage unit 10
6 (step S113), the right management method 20
5, the right information 222 corresponding to the data format 221 of "CD" is read out from the right management table 102 by data format (step S114), and the right information 222 is read according to the script recorded in the right management method 205. Data ID 251, encryption information 25
2, the right information 253 and the file name 254 are written in the data management table 105, and the encryption information 252 and the right information 253 are written in the data storage unit 106 (step S1).
15). 1.3 Conclusion As described above, according to the first embodiment, even in the case of a content read from a CD on which an unencrypted content is recorded, the content is encrypted by a predetermined encryption method. By adding the right information, a copyrighted work can be protected by applying certain restrictions when performing processing such as reproduction, movement, and copying, as in the case of “distributed content”.

Even when a new data format is developed and added, the control method storage table for each data format 1
01. Add new data format and its data storage method, encryption method, encryption key creation method, right management method, and right information to data management table 102 by data format, and easily write in new data format. can do. 2. Second Embodiment A data management device 800 as another embodiment according to the present invention will be described.

As shown in FIG. 8, the data management device 800 is connected to a network 20 such as the Internet or a cable TV via a communication line 10. Web server 30 that supplies music information including content related to music, and billing server 40 that receives a price for using the content and supplies rights information according to the price.
Are connected to the network 20. The data management device 800 acquires music information from the Web server 30,
The acquired music information is stored internally, a fee for using the content is paid to the billing server 40, and right information according to the fee is received. Also, music information including content related to music is read from the CD 300, and the read music information is stored therein. Also, the data management device 8
00 reproduces the stored music information based on the received right information and outputs the music information through the speaker 154.

Further, the data management device 800 writes the stored music information to the recording medium 811 based on the received right information. The recording medium 811 on which the music information is written is mounted on the portable player 401 by the user, and the portable player 401 reproduces the music information written on the recording medium 811 and outputs the music information to the headphones 402. Here, the recording medium 811 is, for example, a semiconductor memory card.

In this way, the user can enjoy music. 2.1 Configuration of Data Management Apparatus 800 As shown in FIG. 9, the data management apparatus 800 includes a data format determination unit 801, a data format unit 802, a rights management table 803 for each data format, an encryption unit 804, and a data storage unit 805. , Multiple data format data management table 8
07, a charging processing unit 808, a data control unit 809, a format conversion unit 810, an input unit 812, and a control method storage table 813 for each data format.

The data management device 800 is, specifically, a microprocessor, an R, like the data management device 100.
It comprises an AM, a display, a speaker, a recording medium input / output unit, a hard disk, a keyboard, a communication unit, and a reading unit, and the communication unit is connected to a communication line. The hard disk stores computer programs,
Data format discriminator 801, encrypter 804, billing processor 808, data controller 809, format converter 81
0 achieves its functions by executing the computer program stored in the hard disk by the microprocessor. The data format determination unit 801 and the billing unit 808 include the communication unit, and include a rights management table 803 for each data format, a data storage unit 805, and a multiple data format data management table 807.
The data format control method storage table 813 includes the hard disk. (Input Unit 812) The input unit 812 is specifically composed of the keyboard or the like, and is used by a user to provide supply source information indicating a supply source of the content, a content identifier for identifying the content, a method of using the content, and the like. Accept the input of.

Here, the supply source information indicates whether the source is an external device connected via a network or a recording medium such as a CD or a DVD. The method of using the content is any of reproduction, recording, and movement of the content. Input unit 8
The data format discriminating unit 80 stores the input source information and the content identifier for identifying the content.
Output to 1. Also, the input unit 812 transmits the input source-supplied information, the content identifier for identifying the content, and the content usage method to the data control unit 809.
Output to (Data format determination unit 801) Data format determination unit 801
Receives, from the input unit 812, supply source information and a content identifier for identifying the content.

The data format determining unit 801 is connected to the outside via a network such as the Internet or a cable TV, similarly to the data format determining unit 103 of the data management apparatus 100. When the data format determination unit 801 receives supply source information indicating an external device connected via a network from the input unit 812, the data format determination unit 801 extracts the distribution content identified by the received content identifier from the external device. The distribution content includes a file A and a file B. File A includes encrypted content such as encrypted music content. The file B includes right information indicating permission / non-permission of reproduction, recording, and movement of the file A, an encryption method for encrypting the encrypted content, and a decryption key for the encrypted content.
The data format determination unit 801 outputs the extracted distribution content, the file name of the file A, and the determination information indicating the distribution content to the data format unit 802.

The data format discriminating section 801 also outputs a CD,
A read unit for a DVD recording medium is provided. Upon receiving the supply source information indicating the recording medium such as a CD or a DVD from the input unit 812, the data format determining unit 801 encrypts the data identified by the content identifier from the CD or the DVD mounted on the reading unit. Read the unencrypted content and read the unencrypted content and CD
Or, the discrimination information indicating the DVD and the data format unit 8
02 is output. (Rights Management Table 803 by Data Format) The rights management table 803 by data format is the same as the rights management table 102 by data format of the data management apparatus 100.
Description is omitted. (Data Format Control Method Storage Table 813) The data format control method storage table 813 stores a plurality of sets of a data format 951, an encryption method 952, and an encryption key creation method 953, as shown in FIG. ing.

The data format 951 indicates that the content is a CD
Alternatively, it indicates whether the content is read from any recording medium such as a DVD. "CD", "DVD"
Indicates the content read from the CD and the DVD, respectively. When the data format 951 is “CD” or “DVD”, the encryption method 952 uses “CD” or “DV”.
D "indicates the encryption method used when encrypting the content read from" D ". According to the example shown in FIG.
When 1 is “CD” or “DVD”, both encryption methods are RSA.

The encryption key creation method 953 includes an encryption method 952
Shows a method for creating an encryption key used in the encryption method indicated by. According to the example shown in FIG.
When 1 is “CD” or “DVD”, the encryption key creation method 953 is both random number generation. Further, when the data format 951 is “DVD”, the length of the music recorded at the head of the DVD is used as a seed for generating random numbers. (Data Format Unit 802) The data format unit 802 receives from the data format determination unit 801 the distribution content, the file name of the file A, and the identification information indicating the distribution content. In addition, the data format unit 802 receives unencrypted content and identification information indicating a CD or a DVD.

Upon receiving the discrimination information indicating CD or DVD from the data format discriminating unit 801, the data format unit 802 generates a random number, and generates a six-digit character string for identifying the content based on the generated random number. Generate. The data format unit 802 reads the right information 222 corresponding to the data format 221 that matches the received discrimination information from the right management table 803 for each data format.

The data format unit 802 reads the encryption method 952 and the encryption key creation method 953 corresponding to the data format 951 corresponding to the received discrimination information from the data format control method storage table 813,
Using the read encryption key creation method 953, an encryption key is generated. Next, the data format unit 802 sets the generated six-digit character string as the data ID 911, sets the read encryption method 952 as the encryption method 921, sets the generated encryption key as the encryption key 922, and sets the read right information as the encryption key 922. 222 as rights information 913, the generated six-digit character string as a file identifier, and combining the file identifier, the separator “.” And the file type “dat” to generate a file name 914, and changing the data format 915 “CD”. The data ID 911, the encryption information 912, and the right information 91 are stored in the multiple data format data management table 807.
3, the file name 914, and the data format 915 are written. Here, the encryption information 912 includes an encryption method 921 and an encryption key 922.

Further, the data format section 802
The received unencrypted content, the read encryption method 952, the generated encryption key, and the file name 914 are output to the encryption unit 804. The data format unit 802 outputs the data format
Upon receiving the identification information indicating the distribution content, the file identifier constituting the file name of the received file A is set to the data ID 911, and the encryption method included in the received distribution content is the encryption method 921.
The decryption key included in the received distribution content is set as an encryption key 922, the right information included in the received distribution content is set as right information 913, the file name of the received file A is set as a file name 914,
The data format 915 is “distribution content”. The data ID 91 is stored in the multiple data format data management table 807.
1, the encryption information 912, the right information 913, the file name 914, and the data format 915. Here, the encryption information 912 includes the encryption method 921 and the encryption key 92.
And 2. Next, the data format unit 80
2 writes the received distribution content into the data storage unit 805 using the file name of the received file A as the file name. (Encryption Unit 804) The encryption unit 804 sends the unencrypted content from the data format unit 802,
An encryption method 952, the encryption key, and a file name 914 are received.

Upon receiving the unencrypted content, the encryption method 952, the encryption key, and the file name 914, the encryption unit 804 divides the unencrypted content by the encryption method 952 using the encryption method 952. Encrypted content is generated using the key, and the generated encrypted content is written to the data storage unit 805 using the file name 914 as a file name. (Data storage unit 805) The data storage unit 805 stores the encrypted content generated by the encryption unit 804 and the distribution content received by the data format unit 802. (Multiple data format data management table 807) As shown in FIG. 11, the multiple data format data management table 807 includes a data ID 911, encryption information 912, rights information 913, a file name 914, and a data format 915. Remember the set.

Each set has one-to-one correspondence with each content stored in the data storage unit 805. The encryption information 912 includes an encryption method 921 and an encryption key 922, and the right information 913 includes a reproduction right 923 and a recording right 923.
4 and a move right 925.

The data ID 911, the encryption method 921, the encryption key 922, the reproduction right 923, the recording right 924, the movement right 925, and the file name 914 are respectively the data ID 251 of the data management table of the data management apparatus 100, the encryption method 261, and the encryption method 261. Since they are the same as the key 262, the reproduction right 271, the recording right 272, the movement right 273, and the file name 254, the description is omitted.

The data format 915 indicates whether the content is a content extracted via a network,
This indicates whether the content is read from a recording medium such as D or DVD. “Distributed content” indicates content extracted via the network, and “C
“D” and “DVD” indicate contents read from a CD and a DVD, respectively.

In this figure, a set 901 is an example when the data format is “CD”, and a set 902 is an example when the data format is “distribution content”. (Charge Processing Unit 808) The charge processing unit 808 is connected to the outside via a network such as the Internet or a cable TV.

The billing processor 808 includes a data controller 809
, A content identifier for identifying the content and a method of using the content are received. The billing processing unit 808
According to the method of using the received content, a charging process for paying a fee for using the content identified by the received content identifier is performed to the outside, and right information according to the method of use is received from the outside. . The right information includes a right to play, a right to record, and a right to move the content.

The accounting unit 808 replaces the right information 913 corresponding to the data ID 911 having the same content as the received content identifier in the multiple data format data management table 807 with the right information received from the outside. (Data control unit 809) The data control unit 809 receives, from the input unit 812, supply source information, a content identifier for identifying the content, and a usage method of the content.

The data control unit 809 compares the rights information 913 corresponding to the data ID 911 having the same content as the received content identifier in the multiple data format data management table 807 with the received usage method. It is determined whether or not use is possible with the received use method. Specifically, when the received usage method is reproduction, the data control unit 809 determines that the reproduction right 923 is available if the reproduction right 923 is “possible”, and determines that the reproduction right 923 is “impossible”. If it is, it is determined that it cannot be used. If the received usage method is recording,
If the recording right 924 is "possible", it is determined that it is available. If the recording right 924 is "impossible", it is determined that it is not available. If the received use method is “moving”, it is determined that the user is available if the moving right 925 is “possible”, and is determined to be unavailable if the moving right 925 is “impossible”.

If the data control unit 809 determines that the data can be used, based on the recording right 924, if the data can be recorded, the data control unit 809 identifies to the format conversion unit 810 by the received content identifier. The content to be converted is converted into a format for a recording medium mounted on the format conversion unit 810, an instruction is given to write the converted content to the recording medium, and the received content identifier is output to the format conversion unit 810. .

If the data control unit 809 determines that the data cannot be used and the received supply source information indicates a recording medium such as a CD or a DVD, the data control unit 809 ends the process. If the data control unit 809 determines that the use is not available, and indicates that the received source information is external to be connected via a network, the data control unit 809 stores the received content identifier and the content usage method. Are output to the charging processing unit 808. Data control unit 80
9, after the charging process by the charging processing unit 808 is completed, the usage is determined again, and when it is determined that the usage is possible, the format conversion unit 810 is identified by the content identifier as described above. The content to be converted is converted into a format for a recording medium, an instruction to write the converted content to the recording medium is issued, and the received content identifier is output to a format conversion unit 810. (Format Converter 810) Format Converter 81
0 is provided with a writing unit for the recording medium 811.

[0058] Format conversion section 810 receives a format conversion instruction and a content identifier from data control section 809. Upon receiving the format conversion instruction from the data control unit 809, the format conversion unit 810 reads the content identified by the received content identifier from the data storage unit 805, and attaches the read content to the format conversion unit 810. The content is converted into a format for the recording medium 811 and the converted content is written to the recording medium 811. (Recording Medium 811) The recording medium 811 is a semiconductor memory,
This is a recording medium such as a DVD-RAM, which is mounted on the format conversion unit 810. The recording medium 811 records the content converted by the format conversion unit 810. 2.2 Operation of Data Management Apparatus 800 The operation of the data management apparatus 800 for extracting contents from the outside or from a recording medium such as a CD or DVD is described with reference to FIG.
This will be described with reference to the flowchart shown in FIG.

The input unit 812 receives from the user input of supply source information, a content identifier for identifying the content, and a method of using the content, and the data format determination unit 801 uses the content identifier received from the outside. Retrieve the identified distribution content or read the unencrypted content identified by the content identifier from the CD or DVD (step S)
1001).

When the data format unit 802 receives the discrimination information indicating CD or DVD from the data format discrimination unit 801 (step S1002), the data format unit 802 reads out the right information from the data format right management table 803, The encryption method and the encryption key creation method are read from the data format control method storage table 813 to generate an encryption key. The received unencrypted content, the read encryption method 952, and the generated encryption key , The file name 914 and the encryption unit 804
Then, the encrypting unit 804 encrypts the unencrypted content using the encryption key according to the encryption method 952 to generate encrypted content, and assigns the generated encrypted content to the file name 914. Then, the data format unit 802 writes the data ID 911 and the encryption information 912 in the multiple data format data management table 807 (step S1006).
, The right information 913, the file name 914, and the data format 915 (step S1007).

When the data format unit 802 receives from the data format determination unit 801 the determination information indicating that the content is a distribution content (steps S1002 to S10)
03), the data format unit 802 stores the data ID 911 in the multiple data format data management table 807,
Encryption information 912, right information 913, and file name 9
14 and the data format 915 (step S1).
004) Next, the data format unit 802 writes the received distribution content into the data storage unit 805 using the file name of the received file A (step S1005).

Next, the operation when the data management device 800 writes the content to the recording medium 811 will be described with reference to FIG.
This will be described with reference to the flowchart shown in FIG. The data control unit 809 receives the supply source information, the content identifier for identifying the content, and the usage method of the content from the input unit 812 (step S1101).
09 compares rights information 913 corresponding to data ID 911 having the same content as the received content identifier in the multiple data format data management table 807 with the received usage method, and determines the received usage method. It is determined whether the content can be used. If it is determined that the content can be used (step S1102), if the recording is possible based on the recording right 924, the format conversion unit 810 sends the received content to the format conversion unit 810. The content identified by the identifier is converted into a format for a recording medium mounted on the format conversion unit 810, an instruction is given to write the converted content to the recording medium, and the received content is transmitted to the format conversion unit 810. The format conversion unit 810 outputs the identifier. Reads the content identified by Tsu content identifier from the data storage unit 805,
The read content is converted into a format for the recording medium 811 attached to the format conversion unit 810, and the converted content is written to the recording medium 811 (step S1103).

If the data control unit 809 determines that the data cannot be used (step S1102) and indicates that the received supply source information is a recording medium such as a CD or DVD (step S1104), the data control unit 809 executes the processing. finish. If the data control unit 809 determines that use is not possible (step S1102), and indicates that the received supply source information indicates that the source information is externally connected via a network (step S1104), the data control unit 809 determines that the received source information is external. The content identifier and the usage method of the content are output to the charging processing unit 808, and the charging processing unit 808 determines, based on the usage method of the received content, a fee for using the content identified by the received content identifier. A billing process for paying is performed to the outside, rights information corresponding to the method of use is received from the outside, and a plurality of data formats
The rights information 913 corresponding to the data ID 911 having the same contents as the received content identifier is replaced with the rights information received from the outside (step S110).
5) The control is shifted to step S1102, and the usage is determined again.
11 is written. 2.3 Portable Player 401 When the recording medium 811 on which the content is recorded is mounted, the portable player 401 reads the content from the recording medium 811 and reproduces the read content.
Output to headphones 402. 2.4 Conclusion As described above, according to the second embodiment, when the content is taken out via the network, the distribution content including the content, the right information, and the encryption information is directly written into the data storage unit, and the CD is stored. When reading content from a recording medium such as a CD, only the encrypted content is written to the data storage unit, and the data format, the right information, and the encryption information are written to the multiple data format data management table. There is no need to add the right information and the encryption information to the read content to convert the content into the same file format as the distribution content, so that the load on the apparatus can be reduced. 3. Other Modifications (1) In the above embodiment, instead of a CD,
"DVD-Video", "DVD-Audio",
A data format such as “distribution content in a plurality of types of data formats” may be added.

The recording medium 811 is a semiconductor memory card, but may be another recording medium such as an MD. (2) In the above embodiment, the data management device
Although it is said that content that is encrypted and to which rights information is added is acquired via a network such as the Internet, content that is not encrypted and to which rights information is not added is acquired via the network. You may get it. For such a type of content, the same data storage method as “CD” or “DVD” is stored in the control method storage table 101 for each data format.
The data registration unit 104 has an encryption method, an encryption key creation method, a right management method, and right / nonexistence information.
In the same manner as “VD”, an encryption key is created, the content is encrypted, the encrypted content is written in the data storage unit 106, and the data ID, the encryption information, the right information, and the file name are written in the data management table 105. (3) In the above embodiment, the following may be performed. The format conversion unit 810 further writes right information including a reproduction right in which “possible” is set, a recording right in which “impossible” is set, and a move right in which “impossible” is set, on a recording medium. 811 is written. Mobile player 4
Reference numeral 01 denotes a recording medium in which content and right information including a reproduction right in which “possible” is set, a recording right in which “impossible” is set, and a move right in which “impossible” is set are recorded. When attached, the right information is read from the recording medium 811 and it is determined whether or not the reproduction right is “possible”. If the reproduction right is “possible”, the content recorded on the recording medium 811 is reproduced. If the reproduction right is “impossible”, the content recorded on the recording medium 811 is not reproduced. (4) In the above embodiment, the right to play, the right to record, and the right to move that constitute the right information indicate whether the user is permitted to play, record, and move the content. "Available" means playing, recording,
Indicates permission to move, and "impossible" means that content can be played,
Although it is described that recording and moving are not permitted, the reproduction right, the recording right, and the moving right may be the number of times the user is permitted to reproduce, record, and move the content. The user is permitted to reproduce, record, and move the content within the above-mentioned number of times. When the content is reproduced, recorded, and moved once, a value of 1 is subtracted from each number.

Further, the right information may be a time limit for permitting reproduction, recording, and movement. The user is permitted to play, record, and move the content within the permitted time limit. (5) In the above embodiment, music information is obtained, stored, played back, moved, and recorded via a network or from a recording medium such as a CD, but is not limited to music information. Multimedia information including still image information, moving image information, movie information including sound and moving image, computer program, character information, control information, character information, still image, moving image, sound, etc. (for example, HTML document)
And so on. (6) The present invention may be the method described above.
Further, these methods may be a computer program that is realized by a computer, or may be a digital signal formed by the computer program.

The present invention also provides a computer-readable recording medium for the computer program or the digital signal, for example, a floppy (registered trademark) disk, hard disk, CD-ROM, MO, DVD, D
The information may be recorded on a VD-ROM, a DVD-RAM, a semiconductor memory, or the like. Further, the present invention may be the computer program or the digital signal recorded on these recording media.

In the present invention, the computer program or the digital signal may be transmitted via an electric communication line, a wireless or wired communication line, a network represented by the Internet, or the like. Further, the program may be recorded on the recording medium and transferred, or the program may be transferred via a network or the like, so as to be executed by another independent computer system. (7) The above embodiment and the above modifications may be combined.

[0068]

As described above, the present invention is directed to a data management apparatus for managing a distributed digital work and rights information in association with each other, wherein each data type indicates the data format of the digital work. A copyright information storage means for storing in advance rights information including at least reproduction right information indicating whether or not reproduction of a digital work is permitted; a copyrighted work storage means; Means for obtaining a digital work that has not been obtained from outside,
Format determining means for determining the type indicating the data format of the acquired digital work, right information reading means for reading right information corresponding to the type indicating the data format of the obtained digital work from the right information storage means, A work writing means for writing the digital work into the work storage means, and the read right information stored in the work storage means in association with the digital work written in the work storage means. Writing right information writing means.

According to this configuration, even when acquiring the content to which the right information is not added, the predetermined right information corresponding to the acquired content is stored, so that the right information is added in advance. As in the case of “distributed content”, at least at the time of reproduction, a certain restriction can be added, and there is an effect that a copyrighted work can be protected.

Here, the copyrighted work writing means further comprises:
The read right information is added to the digital work written in the work storage means. According to this configuration, by adding the right information to the content to which the right information is not added, the content is stored in the same file format as the “distribution content” to which the right information is added in advance. In a device that can manage distributed contents, there is an effect that the contents can be handled similarly.

Here, the rights information further includes recording rights information, wherein the recording rights information indicates whether or not check-out is permitted, and the check-out includes reproduction rights information corresponding to the digital work. And to the outside. Since the rights information includes the reproduction rights information and the recording rights information, it is possible to apply a certain restriction when performing the checkout in addition to the reproduction, and it is possible to protect the copyrighted work. .

Here, the recording right information includes a check-out upper limit number, and the check-out upper limit number indicates an upper limit of the number of times of check-out. Since the recording right information includes the maximum number of checkouts, there is an effect that when performing a checkout, the checkout can be restricted within the maximum number of checkouts.

Here, the right information further includes moving right information, and the moving right information indicates whether to permit moving the digital work and the corresponding right information to the outside. Since the rights information includes the reproduction rights information and the movement rights information, it is possible to apply a certain restriction when performing the movement in addition to the reproduction, and it is possible to protect the copyrighted work.

Here, the data management device further comprises:
And reproducing means for reading out the rights information corresponding to the digital work from the work storage means and reproducing the read digital work based on the read rights information. According to this configuration, while protecting digital works,
There is an effect that it can be reproduced.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing a use form of a data management apparatus 100 as one embodiment according to the present invention.

FIG. 2 is a block diagram showing a configuration of a data management device 100.

FIG. 3 is a block diagram showing a specific configuration of the data management device 100.

4 shows an example of a control method storage table 101 for each data format of the data management apparatus 100. FIG.

5 shows an example of a data management right management table 102 of the data management device 100. FIG.

FIG. 6 is a data management table 1 of the data management device 100.
5 shows an example.

FIG. 7 is a flowchart showing an operation of the data management device 100.

FIG. 8 is a conceptual diagram showing a use form of a data management device 800 as another embodiment according to the present invention.

FIG. 9 is a block diagram showing a configuration of a data management device 800.

FIG. 10 shows an example of a data format control method storage table 813 of the data management device 800.

11 shows an example of a multiple data format data management table 807 of the data management device 800. FIG.

FIG. 12 shows a data management device 800 that is external, CD, or DV.
9 is a flowchart showing an operation when content is taken out from a recording medium such as D.

FIG. 13 is a flowchart illustrating an operation when the data management device 800 writes content to a recording medium 811.

[Explanation of symbols]

 Reference Signs List 10 communication line 20 network 30 Web server 40 billing server 100 data management device 101 control method storage table by data format 102 rights management table by data format 103 data format discriminator 104 data registration unit 105 data management table 106 data storage 800 data management Device 801 Data format discriminator 802 Data format 803 Data format right management table 804 Encryption unit 805 Data storage 807 Multiple data format data management table 808 Billing processor 809 Data controller 810 Format converter 811 Recording medium 812 Input unit 813 Data format control method storage table

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁷ Identification code FI G06F 17/30 120 G06F 17/30 120A 170 170Z // H04N 7/16 H04N 7/16 Z 1006 Kadoma, Kadoma City Matsushita Electric Industrial Co., Ltd. (56) References JP-A-10-177597 (JP, A) JP-A-11-86435 (JP, A) JP-A-6-215010 (JP, A) JP-A-10-294726 (JP, A) JP-A-6-332485 (JP, A) JP-A-11-73729 (JP, A) JP-A-11-3559 (JP, A) 45515 (JP, A) "Music distribution mattanashi", Nikkei Electronics, Japan, Nikkei BP, March 8, 1999, No. 738, P.E. 87-111 (58) Fields investigated (Int.Cl. ⁷ , DB name) G06F 17/60 G06F 12/00 G06F 15/00 G06F 17/30 H04N 7/16

Claims (18)

(57) [Claims] Claims 1. A data management device for managing a distributed digital work and rights information in association with each other, wherein whether to permit reproduction of the digital work for each type indicating the data format of the digital work. A copyright information storage unit which stores in advance rights information including at least reproduction right information indicating whether or not the copyrighted information is obtained; and a copyrighted work storage unit. A work obtaining unit; a format determining unit that determines a type indicating a data format of the obtained digital work; and a right to read out right information corresponding to the type indicating the data format of the obtained digital work from the right information storage unit. Information reading means; a work writing means for writing the obtained digital work to the work storage means; and a work before being written to the work storage means. In association with the digital work, the data management apparatus, characterized in that it comprises a rights information writing means for writing the right information read in the work memory means. 2. The data according to claim 1, wherein the work writing means further adds the read right information to the digital work written in the work storage means. Management device. 3. The rights information further includes recording rights information, wherein the recording rights information indicates whether to permit check-out, and the check-out includes reproduction right information corresponding to the digital work. 2. The data management device according to claim 1, wherein the data management device is configured to copy the data to the outside. 4. The data management apparatus according to claim 3, wherein the recording right information includes an upper limit number of checkouts, and the upper limit number of checkouts indicates an upper limit of the number of times of checkout. 5. The rights information further includes moving rights information, wherein the moving rights information indicates whether to permit moving the digital work and the corresponding rights information to the outside. The data management device according to claim 1. 6. A reproducing means for reading out the digital work and corresponding rights information from the work storage means, and reproducing the read digital work based on the read rights information. The data management device according to claim 1, further comprising: 7. The distributed digital work and the rights information are managed in association with each other, and the data format of the digital work is changed.
For each type shown, the data management apparatus includes a right information storage unit that stores in advance right information including at least reproduction right information indicating whether reproduction of a digital work is permitted or not, and a copyrighted work storage unit. A data acquisition method for acquiring a digital work which is in circulation and to which rights information is not added from the outside, and a format discrimination for discriminating a type indicating a data format of the acquired digital work. A right information reading step of reading, from the right information storage means, right information corresponding to a type indicating a data format of the obtained digital work; and a work book for writing the obtained digital work to the work storage means. The copyright information read out in association with the digital work written in the work storage means. Data management method which comprises a rights information writing step of writing to the work memory means. 8. The data according to claim 7, wherein, in the work writing step, the read right information is added to the digital work written in the work storage means. Management method. 9. The rights information further includes recording rights information, wherein the recording rights information indicates whether to permit check-out, and the check-out includes reproduction rights information corresponding to the digital work. 8. The data management method according to claim 7, wherein the data is copied to the outside. 10. The recording right information includes a maximum number of checkouts, and the maximum number of checkouts indicates an upper limit of the number of times of checkout.
Data management method described in. 11. The rights information further includes moving rights information, wherein the moving rights information indicates whether to permit moving the digital work and the corresponding rights information to the outside. The data management method according to claim 7, wherein 12. The data management method further comprises the step of: reading the digital work and corresponding rights information from the work storage means, and reproducing the read digital work based on the read rights information. The data management method according to claim 7, comprising: 13. A data format of a digital work, which manages a distributed digital work and rights information in association with each other.
A data management device including a copyright information storage unit that stores in advance rights information including at least reproduction right information indicating whether or not to permit reproduction of a digital work, and a copyrighted work storage unit. A computer-readable recording medium storing a data management program to be used, wherein the data management program is a literary work obtaining step of obtaining a digital work which is distributed and to which rights information is not added from the outside. A format determining step of determining a type indicating the data format of the obtained digital work; a rights information reading step of reading, from the rights information storage means, rights information corresponding to the type indicating the data format of the obtained digital work. Writing the obtained digital work in the work storage means; Work the written in the storage means in association with the digital work, the recording medium characterized in that it comprises a rights information writing step of writing the right information read in the work memory means. 14. The work writing step may further include:
14. The recording medium according to claim 13, wherein the read right information is added to the digital work written in the work storage unit. 15. The rights information further includes recording rights information, wherein the recording rights information indicates whether to permit check-out, and the check-out includes reproduction rights information corresponding to the digital work. 14. The recording medium according to claim 13, wherein the recording medium is copied outside. 16. The recording right information includes a checkout upper limit number, and the checkout upper limit number indicates an upper limit of the number of times of checkout.
6. The recording medium according to 5. 17. The moving right information further includes moving right information, wherein the moving right information indicates whether to permit moving the digital work and the corresponding right information to the outside. 14. The recording medium according to claim 13, wherein: 18. The data management program, further comprising: reading the digital work and right information corresponding to the digital work from the work storage means; and reproducing the read digital work based on the read right information. 14. The recording medium according to claim 13, comprising: