JPH10283270A - Reproducing permission method, recording method, and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reproducing permission method which protects the copyright of information recorded in a recording medium without raising the production cost of the recording medium. SOLUTION: Information (product constitution ID) peculiar to recording information (contents P) recorded in a recording medium 10 is used to encipher a first cipher key K to first encryption information (consent code L1), and the first cipher key is used to encipher recording information (contents P) to first encryption recording information (contents C), and peculiar information (product constitution ID) is recorded in a rewrite disable disable area on the recording medium 10, and first encryption information (consent code L1) and first encryption recording information (contents C) are recorded in the rewritable area on the recording medium 10; and at the time of reproducing, read-out peculiar information (product constitution ID) is used to decode first encryption information (consent code L1) to the first cipher key K, and the decoded first cipher key is used to decode first encryption recording information (contents C) to recording information (contents P).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium, such as a DVD (Digital Video Disc), a CD-ROM, and an MO (Magneto-Optical), for protecting copyrights. Permission method for permitting reproduction of recorded information, a recording method on a recording medium applied to the method, a recording medium applied to the method, and a computer program directly used for implementing the method. It relates to a recording medium.

[0002]

2. Description of the Related Art At present, software and contents (recording information, hereinafter referred to as contents) recorded on a recording medium are recorded using unique information (medium ID) different for each recording medium provided in the recording medium. Various reproduction permission methods are used to protect copyright. 16 and 17
FIG. 3 is an explanatory diagram for describing an example of a conventional reproduction permission method. FIG. 16 is an explanatory diagram when recording content on a recording medium. In this reproduction permission method, first, hardware or software 72 having an encryption algorithm is used.
, The content P is encrypted with an appropriate encryption key K, and the encrypted content C is recorded on the recording medium 70.

[0003] Next, using a hardware or software 71 having a license code generation algorithm, the medium I
A license code L0 is generated from D and the encryption key K, and is stored by the copyright holder of the content P. Here, the recording medium 7
Using the medium ID of 0 as the encryption key, the encryption key K may be encrypted to generate the permission code L0. License code L0
Is given only to the person who has authorized the use of the content P by the copyright owner of the content P.

FIG. 17 is an explanatory diagram when using the content C of the recording medium 70. First, the content user receives a permission from the copyright holder of the content P,
It is necessary to obtain the permission code L0. License code L
If 0 can be obtained, the encryption key K can be obtained from the medium ID and the license code L0 using hardware or software 73 having an encryption key generation algorithm. Using the medium ID as an encryption key, a license code L0
To obtain the encryption key K. The content user obtains the encryption key K, and decrypts the encrypted content C into the content P using the encryption key K and the medium ID using the hardware or software 74 having a decryption algorithm, and uses the content P. It becomes possible.

The feature of this reproduction permission method is that the recording medium 70
Since a different medium ID is used for each content, to use the content P, the recording medium 7 on which the content C is recorded is used.
That is, a permission code L0 is required for each 0. For example, a content user having a license code for the recording medium A copies the content from the recording medium A to the recording medium B, and attempts to use the content copied to the recording medium B, and changes the license code for the recording medium A. Even if it is used, since the medium ID is different, hardware or software 73 having an encryption key generation algorithm cannot generate a correct encryption key K and cannot decrypt the content correctly. In order to use the content recorded on the recording medium B, a license code for the recording medium B is required. A content user having only a permission code for the recording medium A is permitted to use the content only on the recording medium A.

Further, if this playback permission method is applied,
The following methods are possible. Rewritable exchangeable recording media (DVD media, CD-R
An encrypted content is recorded in a rewritable area such as an OM medium or an MO medium, and a license code is recorded in a non-rewritable area. The content user pays the usage fee of the content recorded on the exchangeable recording medium to the copyright holder of the content, and receives the exchangeable recording medium. The content user can freely use the content on the exchangeable recording medium by using the license code already recorded on the exchangeable recording medium, but can transfer the content from the exchangeable recording medium to another exchangeable recording medium. When the content is copied, the license code is not copied, so that the content on another exchangeable recording medium cannot be correctly decrypted.

[0007]

Since the exchangeable recording medium is easy to carry, the exchangeable recording medium on which the content and the permission code are recorded by the above-described method is extremely effective as a means for distributing the content. However, this method has a problem in that a large cost is required to manufacture a replaceable recording medium on which a license code and content are recorded.

More specifically, in a manufacturing process of a replaceable recording medium, a general CD-ROM is used such as generating a license code that changes for each medium and recording the generated license code on the corresponding replaceable recording medium. It requires more complicated equipment than the manufacturing equipment. Also, in the inspection process performed after the manufacturing process, since the license code is different for each exchangeable recording medium, it is necessary to inspect whether the license code on the exchangeable recording medium is correct one by one. Therefore, the manufacturing cost is higher than that of a CD-ROM. The present invention has been made in view of the above-described circumstances, and a reproduction permission method and a reproduction permission method capable of protecting the copyright of information recorded on a recording medium without increasing the manufacturing cost of the recording medium. It is intended to provide a recording medium.

[0009]

According to a first aspect of the present invention, there is provided a method for permitting reproduction of recorded information recorded on a recording medium or reproduction of the duplicated recorded information by a predetermined information recorded on the recording medium. In the permitted reproduction permission method, wherein information unique to the recorded information to be recorded is recorded on the recording medium, and reproduction of the recorded information requires the specific information.

According to the reproduction permission method, information unique to the recording information recorded on the recording medium is recorded on the recording medium, and the reproduction of the recorded information requires the unique information. Only when the information can be output, the reproduction of the recorded information can be permitted. As a result, since the recording medium having the same recording information has the same other content configuration,
Manufacturing and inspection can be performed collectively, and the copyright of the information recorded on the recording medium can be protected without increasing the manufacturing cost.

[0011] The reproduction permission method according to the second aspect of the present invention is the method of the first aspect, wherein predetermined first information is used by using information unique to recording information recorded on a recording medium.
Is encrypted to first encrypted information, and the recording information is encrypted to first encrypted recording information using the first encryption key, and the unique information is not re-writable on the recording medium. The first encrypted information and the first encrypted recorded information are recorded in a rewritable area on the recording medium, and the first encrypted information is read out by using the read unique information during reproduction. Decrypting the encrypted information into a first encryption key, and decrypting the first encrypted recording information into the recording information using the decrypted first encryption key.

In this reproduction permission method, the first encryption key is encrypted to the first encryption information by using information unique to the recording information recorded on the recording medium, and the recording is performed by using the first encryption key. The information is encrypted into first encrypted record information. And
Information unique to the recording information is recorded in a non-rewritable area on the recording medium, and the first encrypted information and the first encrypted recording information are recorded in a rewritable area on the recording medium. At the time of reproduction, the first encrypted information is decrypted into a first encryption key using information unique to the read recording information, and the first encrypted recording information is recorded using the decrypted first encryption key. Decode into information.

Thus, when the information is copied to another recording medium, the information unique to the recorded information is not copied, so that the first encryption key cannot be decrypted and the recorded information cannot be reproduced. Therefore, the copyright of the recording information recorded on the recording medium can be protected. In addition, the recording medium having the same recording information has the same other content configuration, and is manufactured and manufactured collectively.
Since the inspection can be performed, the production cost does not increase.

According to a third aspect of the present invention, there is provided a reproduction permission method for permitting reproduction of recorded information recorded on a recording medium or reproduction of the recorded information by using predetermined first information. Information unique to the drive device recorded on the recording medium drive device is required for reproducing the recorded information.

In this reproduction permission method, information unique to the drive device recorded in the drive device for the recording medium is required to reproduce the recorded information recorded on the recording medium. However, reproduction cannot be performed by a different drive device, and the copyright of the recording information recorded on the recording medium can be protected. In addition, the recording medium on which the encrypted information is recorded in the same drive device with the unique information has substantially the same other structure, and can be manufactured and inspected in a lump, resulting in an increase in manufacturing cost. There is no.

According to a fourth aspect of the present invention, in the reproduction permission method, the first encryption key is encrypted to the first encryption information using the unique information, and the recording information is converted to the first encryption key using the first encryption key. , The first encrypted information and the first encrypted recorded information are recorded in a rewritable area on the recording medium, and at the time of reproduction, the first It is characterized in that the encrypted information is decrypted into a first encryption key, and the first encrypted recording information is decrypted into the recording information using the decrypted first encryption key.

In this reproduction permission method, the first encryption key is encrypted into the first encrypted information using information unique to the drive device, and the recorded information is first encrypted using the first encryption key. Encrypt the recorded information. Then, the first encrypted information and the first encrypted recording information are recorded in a rewritable area on the recording medium. At the time of reproduction, the first encrypted information is decrypted into a first encryption key using information unique to the drive device,
Using the decrypted first encryption key, the first encrypted recording information is decrypted into the recording information.

[0018] Thus, reproduction by a drive device having information unique to the drive device cannot be performed, and the copyright of the record information recorded on the recording medium can be protected. In addition, the recording medium on which the encrypted information is recorded in the same drive device with the unique information has substantially the same other structure, and can be manufactured and inspected in a lump, resulting in an increase in manufacturing cost. There is no.

According to a fifth aspect of the present invention, in the reproduction permission method, the first encryption key is encrypted into the first encrypted information using the unique information, and the recorded information is first encrypted using the first encryption key. , And the first encrypted information and the first encrypted recorded information are recorded in a rewritable area on the recording medium, and before the first reproduction, the unique information is used. Decrypts the first encrypted information into a first encryption key, encrypts the decrypted first encryption key into second encrypted information using predetermined second information, The encrypted information is recorded in a rewritable area on the recording medium in place of the first encrypted information, and at the time of reproduction, the second encrypted information is decrypted into a first encryption key using the second information. Decrypting the first encrypted recording information into the recording information using the decrypted first encryption key. To.

In this reproduction permission method, the first encryption key is encrypted into the first encrypted information using information unique to the drive device, and the recorded information is first encrypted using the first encryption key. Encrypt the recorded information. Then, the first encrypted information and the first encrypted recording information are recorded in a rewritable area on the recording medium. Prior to the first reproduction, the first encryption information is decrypted into a first encryption key using information unique to the drive device, and the decrypted first encryption key is used by using predetermined second information. To encrypt the second encrypted information. Then, the second encrypted information is recorded in a rewritable area on the recording medium instead of the first encrypted information. At the time of reproduction, the second encrypted information is decrypted into a first encryption key using the second information, and the first encrypted recording information is decrypted into the recording information using the decrypted first encryption key. I do.

Thus, the encryption information prior to the first reproduction cannot be changed by the drive device having information unique to the drive device, and after the encryption information is changed, the encrypted information is copied to another recording medium. If the second information does not exist, the recording information cannot be decrypted, so that the copyright of the recording information recorded on the recording medium can be protected. In addition, the recording medium on which the encrypted information is recorded in the same drive device with the unique information has substantially the same other structure, and can be manufactured and inspected in a lump, resulting in an increase in manufacturing cost. There is no.

According to a sixth aspect of the present invention, in the reproduction permission method, the first encryption key is encrypted into the first encryption information using the unique information, and the recording information is converted into the first encryption key using the first encryption key. , And the first encrypted information and the first encrypted recorded information are recorded in a rewritable area on the recording medium, and before the first reproduction, the unique information is used. Decrypts the first encrypted information into a first encryption key, decrypts the first encrypted recording information into the recording information using the decrypted first encryption key, and decrypts the decrypted recording information. , Second
The second encryption key is encrypted to the second encryption record information using the second encryption information, the second encryption key is encrypted to the third encryption information using the second information, and the third encryption information is converted to the first encryption information. In place of the encryption information, the second encryption recording information is recorded in a rewritable area on the recording medium, and at the time of reproduction, the third encryption information is converted to the second encryption information using the second information. The second encrypted recording information is decrypted into an encryption key, and the second encrypted recording information is decrypted into the recording information using the decrypted second encryption key.

In this reproduction permission method, the first encryption key is encrypted into the first encrypted information using information unique to the drive device, and the recorded information is first encrypted using the first encryption key. Encrypt the recorded information. Then, the first encrypted information and the first encrypted recording information are recorded in a rewritable area on the recording medium.

Prior to the first reproduction, the first encryption information is decrypted into a first encryption key using information unique to the drive device, and the first encryption information is decrypted using the decrypted first encryption key. The decrypted record information is decoded into record information. The decrypted recording information is encrypted to second encrypted recording information using a second encryption key, and the second encryption key is encrypted to third encryption information using the second information. Then, the third encrypted information is replaced with the first encrypted information, and the second encrypted recording information is recorded in a rewritable area on the recording medium. At the time of reproduction, the third encrypted information is decrypted into a second encryption key using the second information, and the second encrypted recording information is decrypted into the recording information using the decrypted second encryption key. I do.

As a result, the encryption information and the encryption recording information prior to the first reproduction cannot be changed by the drive device having information unique to the drive device, and after the encryption information and the encryption recording information are changed. Cannot be decoded into recorded information without the second information when copied to another recording medium, so that the copyright of the recorded information recorded on the recording medium can be protected. In addition, the recording medium on which the encrypted information is recorded in the same drive device with the unique information has substantially the same other structure, and can be manufactured and inspected in a lump, resulting in an increase in manufacturing cost. There is no.

According to a seventh aspect of the present invention, in the reproduction permission method, the unique information is encrypted with a first encryption key, and the recording information is encrypted with the first encryption key into first encrypted recording information. The first encrypted recording information is recorded in a rewritable area on the recording medium, and before the first reproduction, the unique information is encrypted with a first encryption key, and the first encrypted key is used to encrypt the unique information. First
Is decrypted into the recording information, the second information is encrypted with a second encryption key, and the decrypted recording information is converted into a second encrypted recording information using a second encryption key. And the second encrypted record information is recorded in a rewritable area on the recording medium. At the time of reproduction, the second information is
And encrypting the second encrypted recording information into the recording information using the second encryption key.

In the reproduction permission method, information unique to the drive device is encrypted with a first encryption key, and the recording information is encrypted with the first encryption key into first encrypted recording information. Then, the first encrypted recording information is recorded in a rewritable area on the recording medium. Prior to the first reproduction, information unique to the drive device is encrypted into a first encryption key, and the first encrypted recording information is decrypted into recording information using the first encryption key. And encrypting the second information into a second encryption key,
The decrypted recording information is encrypted into second encrypted recording information using a second encryption key, and the second encrypted recording information is recorded in a rewritable area on a recording medium. During playback,
The second information is encrypted with a second encryption key, and the second encrypted record information is decrypted into the record information using the second encryption key.

As a result, it is impossible to change the encrypted recording information prior to the first reproduction in a drive device having information unique to the drive device, and after the encryption recording information is changed, copy the information to another recording medium. In this case, if there is no second information, the information cannot be decoded into the recorded information, so that the copyright of the recorded information recorded on the recording medium can be protected. Further, the recording medium on which the encrypted recording information encrypted by the encryption key based on the information unique to the same drive device is recorded has substantially the same other structure, and can be manufactured and inspected collectively. Therefore, the production cost does not increase.

[0029] In a reproduction permission method according to an eighth aspect of the present invention, the second information is information unique to each recording medium read from the recording medium.

According to this reproduction permission method, the second information is information unique to each recording medium read from the recording medium, so that the second information is changed after the encryption information or the encrypted recording information is changed prior to the first reproduction. When the information is copied onto a recording medium, the information unique to each recording medium is not copied and cannot be decoded into the recorded information, so that the copyright of the recorded information recorded on the recording medium can be protected. .

[0031] A reproduction permission method according to a ninth invention is characterized in that the second information is information unique to each user.

In this reproduction permission method, since the second information is information unique to each user, after the encryption information or the encryption recording information is changed prior to the first reproduction, the second information is copied to another recording medium. In this case, if the user is different, the information cannot be decoded into the recording information, so that the copyright of the recording information recorded on the recording medium can be protected.

[0033] A reproduction permission method according to a tenth aspect is characterized in that the second information is information unique to a computer that controls the drive device.

In this reproduction permission method, since the second information is information unique to the computer that controls the drive device, after the encryption information or the encryption recording information is changed prior to the first reproduction, another recording is performed. When copied to a medium, if the computer that controls the drive device is different, it cannot be decoded into recorded information, so that the copyright of the recorded information recorded on the recording medium can be protected.

[0035] In the recording method according to the eleventh invention, the predetermined first encryption key is stored in the first storage medium by using information unique to the recording information to be recorded.
Encrypting the recording information into first encrypted recording information using a first encryption key, recording the unique information in a non-rewritable area, The information and the first encrypted recording information are recorded in a rewritable area.

In this recording method, the first encryption key is encrypted into the first encryption information by using information unique to the recording information to be recorded on the recording medium, and the recording information is encrypted by using the first encryption key. Encrypted to 1 encrypted record information. Then, information unique to the recording information is recorded in a non-rewritable area on the recording medium, and the first encrypted information and the first encrypted recording information are recorded in a rewritable area on the recording medium. This allows
When the information is copied to another recording medium, the information unique to the recorded information is not copied, so that the first encryption key cannot be decrypted and the recorded information cannot be reproduced. Therefore, the copyright of the recording information recorded on the recording medium can be protected. Further, the recording medium having the same recording information has the same other content configuration and can be manufactured and inspected in a lump, so that the production cost does not increase.

According to a twelfth aspect of the present invention, in the recording method, the first encryption key is encrypted into the first encryption information by using information specific to the drive device recorded in the drive device, and the recording information to be recorded is converted to the first encryption information. The first encrypted recording information is encrypted using the first encryption key, and the first encrypted information and the first encrypted recording information are recorded in a rewritable area.

In this recording method, the first encryption key is encrypted into the first encrypted information by using information unique to the drive device, and the recorded information is subjected to the first encrypted recording by using the first encryption key. Encrypt information. Then, the first encrypted information and the first
Is recorded in a rewritable area on a recording medium. As a result, reproduction cannot be performed by a drive device having information unique to the drive device, and the copyright of the recorded information recorded on the recording medium can be protected.
In addition, the recording medium on which the encrypted information is recorded by the same information unique to the drive device has substantially the same other structure, and can be manufactured and inspected in a lump, resulting in an increase in manufacturing cost. There is no.

According to a thirteenth aspect of the present invention, in the recording method, information unique to the drive device recorded in the drive device is encrypted into a first encryption key, and the recording information to be recorded is encrypted using the first encryption key. The first encrypted recording information is encrypted in a rewritable area, and the first encrypted recording information is recorded in a rewritable area.

In this recording method, information unique to the drive device is encrypted with a first encryption key, and the recording information is encrypted with the first encryption key into first encrypted recording information. Then, the first encrypted recording information is recorded in a rewritable area on the recording medium. As a result, it is not possible to change the encrypted recording information prior to the first reproduction by the drive device having information unique to the drive device, so that the copyright of the recording information recorded on the recording medium can be protected. Further, a recording medium for recording encrypted recording information encrypted with an encryption key based on information unique to the same drive device,
Other contents and configurations are also substantially the same, and manufacturing and inspection can be performed collectively, so that manufacturing costs do not increase.

According to a fourteenth aspect of the present invention, there is provided a recording medium applied to the reproduction permission method according to the first aspect, wherein information unique to the recorded information is recorded. And

In this recording medium, information unique to the recording information is recorded on the recording medium, and the reproduction of the recording information requires the specific information. Therefore, the recording information can be read only when the specific information can be read. Playback can be allowed. As a result, when the recorded information is the same, the other contents and structures are also the same, so that the production and inspection can be performed collectively, and the copyright of the recorded information can be copyrighted without increasing the production cost. Can be protected.

A recording medium according to a fifteenth aspect of the present invention is characterized in that encrypted information encrypted from a predetermined encryption key using the unique information is recorded.

In this recording medium, encrypted information encrypted from a predetermined encryption key using information unique to the recorded information is recorded. Even if the information is copied, the information unique to the recorded information is not copied. Since the encrypted information cannot be decrypted into an encryption key, if the record information is the same, the other content configuration will be the same,
Manufacturing and inspection can be performed collectively, and the copyright of the recorded information can be protected without increasing the manufacturing cost.

A recording medium according to a sixteenth aspect of the present invention is a recording medium applied to the reproduction permission method according to claim 4 and uses a specific information recorded on the drive device and specific to the drive device. It is characterized in that encryption information encrypted from an encryption key is recorded.

In this recording medium, the first encrypted information and the first encrypted recorded information are recorded in a rewritable area. Therefore, at the time of reproduction, the first encrypted information is written using information unique to the drive device. Encrypted information can be decrypted into a first encryption key, and the first encrypted recording information can be decrypted into recording information using the decrypted first encryption key. As a result, playback cannot be performed by a drive device having information unique to the drive device,
The copyright of the recorded information can be protected. In addition, the recording medium on which the encrypted information is recorded in the same drive device with the unique information has substantially the same other structure, and can be manufactured and inspected in a lump, resulting in an increase in manufacturing cost. There is no.

According to a seventeenth aspect of the present invention, there is provided a recording medium recording a computer program for reproducing recording information recorded on an applicable recording medium applied to the reproduction permission method according to claim 2. And read out,
Decrypting the first encrypted information into a first encryption key using information unique to the recorded information;
Decrypting the first encrypted record information into the record information using the encryption key of (1).

In the computer controlled by the computer program recorded on the recording medium, when reproducing the recording information recorded on the applicable recording medium, the first information is used by using the information unique to the read recording information. The encrypted information is decrypted into a first encryption key, and the first encrypted record information is decrypted into the record information using the decrypted first encryption key. As a result, when the information is copied to another recording medium, the information unique to the recorded information is not copied, so that the first encryption key cannot be decrypted and the recorded information cannot be reproduced. Therefore, the copyright of the recording information recorded on the recording medium can be protected.

A recording medium according to an eighteenth aspect of the present invention is a recording medium on which a computer program for reproducing recorded information recorded on an applicable recording medium applied to the reproduction permission method according to claim 4 is recorded. Decrypting the first encrypted information into a first encryption key using information specific to the drive device recorded on the drive device for the applied recording medium; and Decrypting the first encrypted record information into the record information by using an encryption key.

In the computer controlled by the computer program recorded on the recording medium, when reproducing the recording information recorded on the applicable recording medium, the first encryption is performed using the information unique to the drive device. The information is decrypted into a first encryption key, and the first encrypted recording information is decrypted into the recording information using the decrypted first encryption key. As a result, reproduction cannot be performed by a drive device having information unique to the drive device, and the copyright of the recorded information recorded on the recording medium can be protected.

A recording medium according to a nineteenth aspect of the present invention is a recording medium storing a computer program for reproducing recorded information recorded on an applicable recording medium applied to the reproduction permission method according to claim 5. Decoding the first encryption information into a first encryption key using information specific to the drive device recorded in the drive device for the applicable recording medium, prior to the first reproduction. Encrypting the decrypted first encryption key into second encrypted information using predetermined second information; and replacing the second encrypted information with the first encrypted information. Recording in a rewritable area on the applicable recording medium;
Decrypting the second encrypted information into a first encryption key by using the information of (1), and decrypting the first encrypted recording information into the recording information by using the decrypted first encryption key. And a computer program including steps.

In the computer controlled by the computer program recorded on the recording medium, prior to the first reproduction of the recording information recorded on the applicable recording medium, the first information is used by using the information unique to the drive device. The encrypted information is decrypted into a first encryption key, and the decrypted first encryption key is encrypted into second encrypted information using predetermined second information. Then, the second encrypted information is recorded in a rewritable area on the recording medium instead of the first encrypted information.
At the time of reproducing the recorded information, the second encrypted information is decrypted into a first encryption key by using the second information, and the first encrypted recording information is decrypted by using the decrypted first encryption key. To decrypt.

As a result, the encryption information prior to the first reproduction cannot be changed by the drive device having different information unique to the drive device, and after the encryption information is changed, it is copied to another recording medium. If the second information does not exist, the recording information cannot be decrypted, so that the copyright of the recording information recorded on the recording medium can be protected.

According to a twentieth aspect of the present invention, there is provided a recording medium recording a computer program for reproducing recorded information recorded on an applicable recording medium applied to the reproduction permission method according to claim 6. Decoding the first encryption information into a first encryption key using information specific to the drive device recorded in the drive device for the applicable recording medium, prior to the first reproduction. Decrypting the first encrypted record information into the record information using the decrypted first encryption key, and converting the decrypted record information into a second cipher using the second cryptographic key. Encrypting the encrypted recording information, encrypting the second encryption key into third encrypted information using predetermined second information, and encrypting the third encrypted information with the first encrypted information. In place of the information, the second encrypted record information Is recorded in a rewritable area on the recording medium, at the time of reproduction, the step of decrypting the third encrypted information into the second encryption key using the second information, Decrypting the second encrypted record information into the record information using the encryption key of (1).

In a computer controlled by a computer program recorded on the recording medium, prior to the first reproduction of the recording information recorded on the applicable recording medium, the first information is used by using information unique to the drive device. The encrypted information is decrypted into a first encryption key, and the first encrypted record information is decrypted into the record information using the decrypted first encryption key. The decrypted record information is stored in the second
To the encrypted record information of the second
Is encrypted into third encrypted information. Then, the third encrypted information is replaced with the first encrypted information, and the second encrypted recording information is recorded in a rewritable area on the recording medium. At the time of reproducing the recorded information, the third encrypted information is decrypted into a second encryption key using the second information, and the second encrypted recording information is converted into the recorded information using the decrypted second encryption key. To decrypt.

As a result, the encryption information and the encryption record information prior to the first reproduction cannot be changed by the drive device having different information unique to the drive device, and after the change of the encryption information and the encryption record information. Cannot be decoded into recorded information without the second information when copied to another recording medium, so that the copyright of the recorded information recorded on the recording medium can be protected.

A recording medium according to a twenty-first aspect of the present invention is a recording medium on which a computer program for reproducing recording information recorded on an applicable recording medium applied to the reproduction permission method according to claim 7 is recorded. Prior to the first playback, encrypting information specific to the drive device recorded in the drive device for the applicable recording medium into a first encryption key, and using the first encryption key. Decrypting the first encrypted record information into the record information, encrypting predetermined second information into a second encryption key,
The decrypted recording information is stored in a second storage medium using a second encryption key.
Encrypting the information into encrypted recording information, recording the second encrypted recording information in a rewritable area on the recording medium, and encrypting the second information with a second encryption key during reproduction. And recording a computer program including a step of decrypting the second encrypted record information into the record information by using a second encryption key.

In the computer controlled by the computer program recorded on the recording medium, prior to the first reproduction of the recording information recorded on the applicable recording medium, the information unique to the drive device is stored in the first encryption key. And decrypts the first encrypted record information into record information using the first encryption key. Then, the second information is encrypted with the second encryption key, and the decrypted recording information is encrypted with the second encryption key into the second encryption recording information. Recording is performed in a rewritable area on the recording medium.
When reproducing the recorded information, the second information is encrypted with a second encryption key, and the second encrypted recording information is decrypted into the recorded information using the second encryption key.

As a result, it is impossible to change the encrypted recording information prior to the first reproduction in a drive device having different information unique to the drive device, and after the encrypted recording information is changed, copy it to another recording medium. In this case, if there is no second information, the information cannot be decoded into the recorded information, so that the copyright of the recorded information recorded on the recording medium can be protected.

[0060]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing an embodiment. Embodiment 1 FIG. FIG. 1 is an explanatory diagram for explaining Embodiment 1 of the reproduction permission method according to the first and second inventions, the recording method according to the eleventh invention, and the recording medium according to the fourteenth and fifteenth inventions. FIG. 4 is an explanatory diagram for describing a method of generating information to be recorded on a replaceable recording medium. This generation method is
A product configuration ID (information unique to recording information) corresponding to the content configuration and type to be recorded on the replaceable recording medium 10 (recording medium), and an encryption key K (first encryption key) for the content P (recording information) Then, the license code L1 (first encrypted information) is generated by the hardware or software 11 having the license code generation algorithm. Product configuration ID
The medium ID of each exchangeable recording medium is recorded in the non-rewritable area of the exchangeable recording medium 10.

The content P is encrypted by the hardware or software 12 having an encryption algorithm from the encryption key K for the content P to generate the content C (first encrypted recording information), and the content C (first encrypted recording information) is generated together with the above-described permission code L1. , In the rewritable area of the exchangeable recording medium 10.

In the conventional reproduction permission method (FIG. 16), the permission code L0 depending on the medium ID is generated. However, since the permission code L0 must be generated for each medium ID, manufacturing equipment becomes complicated. , Leading to an increase in manufacturing costs. On the other hand, in the reproduction permission method shown in FIG. 1, the license code L1 and the content C are common data for each product configuration ID, and the manufacturing equipment is simpler than the conventional reproduction permission method (FIG. 16). It is possible to keep it low.

FIG. 2 is an explanatory diagram for explaining a method of using the content C recorded on the exchangeable recording medium 10. In this usage method, the product configuration ID and the license code L1 are read from the exchangeable recording medium 10, and the encryption key K is obtained from the product configuration ID and the license code L1 using hardware or software 13 having an encryption algorithm. Next, using the obtained encryption key K, the encrypted content C is decrypted into the content P using hardware or software 14 having a decryption algorithm. This allows
The content P can be used.

FIG. 3 is an explanatory diagram for explaining a manufacturing process of a replaceable recording medium used in the reproduction permission method according to the first and second inventions. In this manufacturing process, first, a manufacturing plan is made. In the manufacturing plan, the type and configuration of the content to be recorded on the exchangeable recording medium are determined, the product configuration ID corresponding to the type and configuration of the content is determined, and the correspondence between the type and configuration of the content and the product configuration ID is determined. Is registered in the database of the main computer 80. Next, the main computer 80 creates a production plan table. In the production plan table, the product configuration ID, the start medium ID of the first replaceable recording medium to be produced, and the number of production sheets are recorded.

At the start of production, the main computer 80 obtains the product configuration ID of the exchangeable recording medium to be produced and the number of products to be produced according to the production plan table.
1 and an instruction to manufacture an exchangeable recording medium is issued to the ID recording device 85. The ID recorder 85 receives the number of manufactured sheets, the start medium ID, and the product configuration ID from the main computer 80, and sets the start medium ID as an initial value of the medium ID counter. Next, the ID recording device 85 stores the medium I in the non-rewritable area of the exchangeable recording medium 84 on which no ID is recorded.
The medium ID and the product configuration ID indicated by the D counter are recorded. The medium ID counter stores the medium I in the exchangeable recording medium 84.
It is incremented each time D is recorded. Thereby, it is possible to obtain the exchangeable recording medium 86 in which the medium ID and the product configuration ID are recorded.

On the other hand, the database server 81 generates a content encryption key by the above-described method (FIG. 1), and encrypts the content group using the generated encryption key. At this time, the correspondence between the encryption key and the product configuration ID is stored in the database. Next, a permission code depending on the product configuration ID is generated. Thereby, the exchangeable recording medium 86
Is determined (encrypted content group and permission code), and the entire data is provided to the copying machine 82. In the copying machine 82, the encrypted content group and the license code are replaced with the exchangeable recording media 8 for the number of sheets to be manufactured.
6 is copied to a rewritable area to manufacture a replaceable recording medium 83 as a product.

Embodiment 2 FIG. 4 shows third to fifth, eighth to first.
FIG. 31 is an explanatory diagram for describing Embodiment 2 of the reproduction permission method according to the 0th invention, the recording method according to the twelfth invention, and the recording medium according to the 16th invention; FIG. 4 is an explanatory diagram for describing a method of generating a slash.
This generation method is performed by a drive device manufacturer 2 for exchangeable recording medium.
1 and a drive ID (information unique to the drive device) recorded in the drive device for the exchangeable recording medium, and an encryption key K (first information) for the content P (recorded information).
A license code L1 (first encryption information) is generated from the encryption key) and hardware or software 22 having a license code generation algorithm.

The content P is encrypted by hardware or software 23 having an encryption algorithm from the encryption key K for the content P to generate the content C (first encrypted recording information), and the content C (first encrypted recording information) is generated together with the above-described permission code L1. , In the rewritable area of the exchangeable recording medium 20. The medium ID (second information, information unique to each recording medium) of each exchangeable recording medium is recorded in the non-rewritable area of the exchangeable recording medium 20.

In the conventional reproduction permission method (FIG. 16), the permission code L0 depending on the medium ID is generated. However, since the permission code L0 must be generated for each medium ID, manufacturing equipment becomes complicated. , Leading to an increase in manufacturing costs. On the other hand, in the reproduction permission method shown in FIG. 1, the permission code L1 and the content C are common data for each drive ID, so that the manufacturing equipment is simpler than the conventional reproduction permission method (FIG. 16), and the production cost is lower. It becomes possible to hold down.

FIG. 5 is an explanatory diagram for explaining a method of changing the permission code performed before the content recorded on the exchangeable recording medium 20 is used for the first time. When the content user uses the content C recorded on the exchangeable recording medium 20, the exchangeable recording medium drive device 24 first
By referring to the content usage information recorded on the exchangeable recording medium 20, it is checked whether the content is already used. When the content is not used, the license code L1 depending on the drive ID is changed to a license code L2 (second encrypted information) dependent on the medium ID.

The change from the license code L1 to the license code L2 is performed as follows. The drive ID obtained from the exchangeable recording medium drive device 24 and the exchangeable recording medium 20
Hardware or software 25 having an encryption key generation algorithm from the license code L1 read from
Is used to temporarily generate the encryption key K. This allows
In a drive device for a replaceable recording medium having a different drive ID, the encryption key K cannot be generated, and the permission code cannot be changed. Next, the license code L2 is generated from the medium ID read from the exchangeable recording medium 20 and the encryption key K using hardware or software 26 having a license code generation algorithm. Next, the obtained permission code L2 is recorded in the rewritable area of the exchangeable recording medium 20.

After recording the permission code L2 on the exchangeable recording medium 20, the content use information on the exchangeable recording medium 20 is changed to the meaning of "content has already been used". As a result, thereafter, by referring to the content usage information, it is determined that “the content has already been used”,
The license code L2 is not regenerated. As a result, even when copied from the exchangeable recording medium 20 to another exchangeable recording medium, the license code L2 is not generated by the medium ID of another exchangeable recording medium. Content copied to a medium is not used.

FIG. 6 shows that the permission code L2 is stored in the exchangeable recording medium 2.
FIG. 10 is an explanatory diagram for describing a content decryption process performed after the content is recorded in “0”. In this decryption process, first, the medium ID and the permission code L2 are read from the exchangeable recording medium 20. Next, an encryption key K is generated from the medium ID and the permission code L2 using hardware or software 27 having an encryption key generation algorithm. Next, the content C is decrypted into the content P from the encryption key K using hardware or software 28 having a decryption algorithm. As a result, the content C can be used, and after the license code is changed, the content C can be used even with a drive device for a replaceable recording medium having a different drive ID.

Note that, as shown in FIG. 2 of the first embodiment, the encrypted content C may be directly decrypted into the content P without changing the permission code shown in FIG. However, in this case, the drive ID obtained from the interchangeable recording medium drive device 24 is used instead of the product configuration ID. This makes it impossible for the interchangeable recording medium drive device having a different drive ID to use the content C.

Embodiment 2 of the reproduction permission method according to the present invention
The manufacturing process of the replaceable recording medium used in the first embodiment is almost the same as the manufacturing process (FIG. 3) of the replaceable recording medium used in the first embodiment of the reproduction permission method according to the present invention described above, and the description is omitted. I do. However, in the manufacturing process of the replaceable recording medium used in the second embodiment, a drive ID determined by a replaceable recording medium drive device maker is used instead of the product configuration ID in FIG. I to be recorded
D is only the medium ID.

Embodiment 3 FIG. 7 shows that the content recorded on the exchangeable recording medium 30 used in Embodiment 3 of the reproduction permission method according to the third, sixth, and eighth inventions and the recording method according to the twelfth invention is used before being used for the first time. FIG. 7 is an explanatory diagram for explaining a method of changing a permission code and re-encryption of content. The method of generating the information to be recorded on the rewritable exchangeable recording medium 30 is the same as the method described in the second embodiment with reference to FIG. When the content user uses the content C recorded on the exchangeable recording medium 30, the exchangeable recording medium drive device 31 first refers to the content usage information recorded on the exchangeable recording medium 30, Checks if is already used. When the content is not used, the license code L1 depending on the drive ID is changed to a license code L2 (second encrypted information) dependent on the medium ID, and the content C (first encrypted recording) is changed. Information) is re-encrypted into a content C2 (second encrypted recording information) by another encryption algorithm.

The change from the license code L1 to the license code L2 and the re-encryption from the content C to the content C2 are performed as follows. The drive ID obtained from the exchangeable recording medium drive device 31 and the exchangeable recording medium 30
Hardware or software 32 having an encryption key generation algorithm from the license code L1 read from the
Is used to temporarily generate the encryption key K. This allows
In a drive device for a replaceable recording medium having a different drive ID, the encryption key K cannot be generated, and the license code cannot be changed and the content cannot be re-encrypted.

On the other hand, using hardware or software 34 having a license code generation algorithm, the medium ID read from the exchangeable recording medium 30 and the encryption key K2 (second , A license code L2 (second encryption information) is generated from
The data is recorded in the rewritable area of the exchangeable recording medium 30.
Next, the content C is sequentially read from the exchangeable recording medium 30, and is decrypted into the content P with the encryption key K using hardware or software 33 having a decryption algorithm, and the decrypted content P is provided with the encryption algorithm. The content C2 is re-encrypted with the encryption key K2 using the hardware or software 35 and recorded in the rewritable area of the exchangeable recording medium 30.

After recording the permission code L2 and the re-encrypted content C2 on the exchangeable recording medium 30, the content use information on the exchangeable recording medium 30 is changed to the meaning of "content has already been used". As a result, thereafter, by referring to the content usage information, it is determined that “the content has already been used”, and the license code L2 is not regenerated.

As a result, even when a copy is made from the exchangeable recording medium 30 to another exchangeable recording medium, the license code L2 is not generated by the medium ID of the other exchangeable recording medium, and another The content copied to the replacement recording medium is not used. Further, after the change of the permission code and the re-encryption of the content, the exchangeable recording medium 30 can be used and the content can be read even with the exchangeable recording medium drive device having a different drive ID.

The content decoding process performed after the permission code L2 is recorded on the exchangeable recording medium 30 is the same as the decoding process described in the second embodiment with reference to FIG. Is omitted. However, in the third embodiment, the encryption key K and the content C in FIG.
Are the encryption key K2 and the content C2, respectively. Since the manufacturing process of the replaceable recording medium 30 is substantially the same as the manufacturing process of the replaceable recording medium of the first embodiment (FIG. 3),
Description is omitted. However, in the manufacturing process of the exchangeable recording medium 30, the drive I determined by the exchangeable recording medium drive device maker is replaced with the product configuration ID in FIG.
D, and the ID recorded by the ID recording device 85 is only the medium ID.

Embodiment 4 FIG. 8 is an explanatory diagram for explaining Embodiment 4 of the reproduction permission method according to the third, seventh, and eighth inventions and the recording method according to the thirteenth invention, and records on a rewritable exchangeable recording medium. FIG. 9 is an explanatory diagram for describing a method for generating information. This generation method is determined by the drive device maker 41 for the interchangeable recording medium, and from the drive ID recorded in the drive device for the interchangeable recording medium, using hardware or software 42 having an encryption key generation algorithm, An encryption key K for the content P is generated.

Next, the content P is encrypted from the encryption key K for the content P by using hardware or software 43 having an encryption algorithm, and the content C is encrypted.
Is generated and recorded in the rewritable area of the exchangeable recording medium 40. The medium ID of each exchangeable recording medium is recorded in the non-rewritable area of the exchangeable recording medium 20.

In the conventional reproduction permission method (FIG. 16), the permission code L0 depending on the medium ID is generated. However, since the permission code L0 must be generated for each medium ID, the manufacturing equipment becomes complicated. , Leading to an increase in manufacturing costs. On the other hand, in the reproduction permission method shown in FIG. 8, the content C becomes common data for each drive ID, the manufacturing equipment becomes simpler than the conventional reproduction permission method (FIG. 16), and the production cost can be reduced. Become.

FIG. 9 is an explanatory diagram for explaining re-encryption of the content performed before the content recorded on the exchangeable recording medium 40 is used for the first time. When the content user uses the content C recorded on the exchangeable recording medium 40, the exchangeable recording medium drive device 44 first
By referring to the content usage information recorded on the exchangeable recording medium 40, it is checked whether the content is already used. When the content is not used, the content C is converted to the content C2 by another encryption algorithm.
To re-encrypt.

Re-encryption from content C to content C2 (second encrypted recording information) is performed as follows. The encryption key K is temporarily generated from the drive ID obtained from the exchangeable recording medium drive device 44 by using hardware or software 42 having an encryption key generation algorithm. As a result, in the exchangeable recording medium drive device having a different drive ID, the encryption key K cannot be generated, and the license code cannot be changed and the content cannot be re-encrypted.

On the other hand, using hardware or software 47 provided with an encryption key generation algorithm, an encryption key K 2 (second Is generated. Next, the content C is sequentially read from the exchangeable recording medium 40, decrypted into the content P by the encryption key K using hardware or software 46 having a decryption algorithm, and the decrypted content P is provided with the encryption algorithm. Re-encrypted into the content C2 by the encryption key K2 using the hardware or software 48,
The data is recorded in the rewritable area of the exchangeable recording medium 40.

After the re-encrypted content C2 is recorded on the exchangeable recording medium 40, the content use information on the exchangeable recording medium 40 is changed to the meaning of "content has already been used". As a result, thereafter, by referring to the content usage information, it is determined that “the content has already been used”, and the re-encryption of the content C into the content C2 is not performed. As a result, even when the copy is performed from the exchangeable recording medium 40 to another exchangeable recording medium, the encryption key K2 is not generated by the medium ID of the other exchangeable recording medium, and another exchangeable recording medium Will not be used.

FIG. 10 shows the re-encrypted content C2.
FIG. 9 is an explanatory diagram for describing a content decryption process performed after is recorded on the replaceable recording medium 40. In this decoding process, first, the medium ID is read from the exchangeable recording medium 40. Next, from this medium ID, using hardware or software 49 having an encryption key generation algorithm,
An encryption key K2 is generated. Next, from the encryption key K2, hardware or software 50 having a decryption algorithm is used.
To decrypt the content C2 into the content P.
This makes it possible to use the content C,
After the change of the permission code and the re-encryption of the content, the content C can be used even with a drive device for a replaceable recording medium having a different drive ID.

Embodiment 4 of the reproduction permission method according to the present invention
The manufacturing process of the replaceable recording medium used in the first embodiment is almost the same as the manufacturing process (FIG. 3) of the replaceable recording medium used in the first embodiment of the reproduction permission method according to the present invention described above, and the description is omitted. I do. However, in the manufacturing process of the replaceable recording medium used in the fourth embodiment, instead of the product configuration ID in FIG. I to be recorded
D is only the medium ID. The information copied by the copying machine 82 is only an encrypted content group.

Embodiment 5 FIG. 11 is an explanatory diagram for describing a configuration example of an embodiment of a recording medium according to the seventeenth invention. In this embodiment, a step ST10 of decrypting the first encrypted information into a first encryption key by using the read information unique to the recording information, and a step of using the decrypted first encryption key. A CD-ROM (CD1) on which a computer program PR1 including a step ST11 of decrypting the first encrypted record information into the record information is recorded.
Is loaded into the disk drive DD, and the content is read into the personal computer PC.

After the computer program PR1 is read, the CD-ROM (CD1) is taken out from the disk drive DD, and the disk drive DD is loaded with, for example, a replaceable recording medium 10 (FIG. 1) and its contents are read. Is read into the personal computer PC. Other operations of the personal computer PC are the same as those of the method of using the content C described in the first embodiment, and thus the description is omitted.

Embodiment 6 FIG. FIG. 12 is an explanatory diagram for describing a configuration example of an embodiment of a recording medium according to the eighteenth invention. In this embodiment, the disk drive DD
Step ST20 of decrypting the first encrypted information into a first encryption key using information unique to the disk drive DD recorded in the (applied recording medium drive device), and the decrypted first encryption A step ST21 of decrypting the first encrypted record information into the record information using a key.
M (CD2) is loaded in the disk drive DD, and the content is read into the personal computer PC.

After the computer program PR2 is read, the CD-ROM (CD2) is taken out from the disk drive DD, and the disk drive DD is loaded with, for example, a replaceable recording medium 20 (FIG. 4) and its contents are read. Is read into the personal computer PC. Other operations of the personal computer PC are the same as those of the method of using the content C described in the second embodiment, and a description thereof will be omitted.

Embodiment 7 FIG. FIG. 13 is an explanatory diagram for describing a configuration example of an embodiment of a recording medium according to the nineteenth invention. In this embodiment, prior to the first playback,
Step ST30 of decrypting the first encryption information into a first encryption key using information unique to the disk drive DD recorded in the disk drive DD (the drive device for the applicable recording medium); A step ST31 of encrypting the first encryption key into second encrypted information using predetermined second information; and replacing the second encrypted information with the first encrypted information by using the applied recording medium. A step ST32 of recording in the upper rewritable area, a step ST33 of decrypting the second encrypted information into a first encryption key using the second information at the time of reproduction, and a step ST33 of decrypting the first encrypted key. A CD-ROM (CD3) storing a computer program PR3 including a step ST34 of decrypting the first encrypted recording information into the recording information using a key is loaded into the disk drive DD. , The contents of which are read into the personal computer PC.

After the computer program PR3 is read, the CD-ROM (CD3) is taken out from the disk drive DD, and the disk drive DD is loaded with, for example, a replaceable recording medium 20 (FIG. 4) and its contents are read. Is read into the personal computer PC. Other operations of the personal computer PC are the same as those of the method of using the content C described in the second embodiment, and a description thereof will be omitted.

Embodiment 8 FIG. FIG. 14 is an explanatory diagram for describing a configuration example of an embodiment of a recording medium according to the twentieth invention. In this embodiment, prior to the first playback,
Step ST40 of decrypting the first encryption information into a first encryption key by using information unique to the disk drive DD recorded in the disk drive DD (the drive device for the applicable recording medium), and Step ST41 of decrypting the first encrypted record information into the record information using the first encryption key, and converting the decrypted record information into the second encrypted record information using the second encryption key. Step ST42 for encrypting the second encryption key into third encrypted information using predetermined second information.
A step ST44 of replacing the third encrypted information with the first encrypted information and recording the second encrypted recording information in a rewritable area on the recording medium;
Step ST45 of decrypting the third encrypted information into a second encryption key using the second information, and adding the second encrypted recording information to the recording information using the decrypted second encryption key. A CD-ROM (CD4) in which a computer program PR4 including a decryption step ST46 is recorded is loaded in the disk drive DD, and the content is read into the personal computer PC.

After the computer program PR4 is read, the CD-ROM (CD4) is taken out from the disk drive DD, and the disk drive DD is loaded with, for example, a replaceable recording medium 30 (FIG. 7) and its contents are read. Is read into the personal computer PC. Other operations of the personal computer PC are the same as those of the method of using the content C described in the third embodiment, and thus the description is omitted.

Embodiment 9 FIG. FIG. 15 is an explanatory diagram for describing a configuration example of an embodiment of a recording medium according to the twenty-first invention. In this embodiment, prior to the first playback,
Step ST50 of encrypting information unique to the disk drive DD recorded in the disk drive DD (the drive device for the applicable recording medium) into a first encryption key, and performing a first encryption using the first encryption key. Step ST51 of decrypting the encrypted record information into the record information, step ST52 of encrypting predetermined second information into a second encryption key, and using the second encryption key to decrypt the decrypted record information. ST53 for encrypting the second encrypted record information into second encrypted record information, recording the second encrypted record information in a rewritable area on the recording medium, and ST52 for reproducing the second information during reproduction. Step ST55 for encrypting to the encryption key of
CD-ROM (CD5) storing a computer program PR5 including a step ST56 of decrypting the second encrypted record information into the record information using the encryption key of
Is loaded into the disk drive DD, and the content is read into the personal computer PC.

After the computer program PR5 is read, the CD-ROM (CD5) is taken out from the disk drive DD, and the disk drive DD is loaded with, for example, a replaceable recording medium 40 (FIG. 8) and its contents are read. Is read into the personal computer PC. Other operations of the personal computer PC are the same as those of the method of using the content C described in the fourth embodiment, and thus the description is omitted.

In FIG. 5, the license code L1 dependent on the drive ID is changed from the license code L2 dependent on the medium ID.
Although the method for changing to the medium ID has been described, a permission code depending on information unique to each content user may be used instead of the medium ID. Information unique to each content user
Specifically, the user ID is a user ID managed by the OS of the computer or a user ID recorded on an IC card. As a result, the content recorded on the exchangeable recording medium 20 cannot be used except by a specific computer or a specific user.

In addition to the permission code depending on the medium ID or the information dependent on the information unique to each user,
The license code may be changed to a permission code depending on information unique to the computer that controls the drive for the interchangeable recording medium. The information unique to the computer is, specifically, a machine ID or the like of a BIOS (Basic Input Output System) of the computer. As a result, the content recorded on the exchangeable recording medium cannot be used except by a specific computer. As described above, various content use ranges can be set depending on what information the license code depends on, but these are left to the copyright holder of the content. Also, it goes without saying that the recording medium described in the fifth to ninth embodiments is not limited to a CD-ROM, but may be a hard disk or a replaceable recording medium.

[0103]

According to the reproduction permission method according to the first invention,
Recording media with the same recording information can be manufactured and inspected in a lump, without increasing manufacturing costs.
The copyright of the information recorded on the recording medium can be protected.

According to the reproduction permission method of the second invention, when the information is copied to another recording medium, the information unique to the recorded information is not copied, so that the first encryption key cannot be decrypted and the recorded information is decrypted. Can not be converted. Therefore, the copyright of the recording information recorded on the recording medium can be protected. In addition, since the recording media having the same recording information can be manufactured and inspected collectively, the production cost does not increase.

According to the reproduction permission method according to the third aspect of the present invention, reproduction cannot be performed by a drive device having information unique to the drive device, and the copyright of the recorded information recorded on the recording medium can be protected. In addition, a recording medium in which encrypted information is recorded by information unique to the same drive device,
Since manufacturing and inspection can be performed collectively, an increase in manufacturing cost does not occur.

According to the reproduction permission method according to the fourth aspect of the present invention, reproduction cannot be performed by a drive device having information unique to the drive device, and the copyright of the recorded information recorded on the recording medium can be protected. In addition, a recording medium in which encrypted information is recorded by information unique to the same drive device,
Since manufacturing and inspection can be performed collectively, an increase in manufacturing cost does not occur.

According to the reproduction permission method according to the fifth aspect of the present invention, the encryption information cannot be changed prior to the first reproduction in a drive device having information unique to the drive device. , When copied to another recording medium,
Without the second information, it is not possible to decrypt the recorded information, so that the copyright of the recorded information recorded on the recording medium can be protected. In addition, a recording medium in which encrypted information is recorded by information unique to the same drive device,
Since manufacturing and inspection can be performed collectively, an increase in manufacturing cost does not occur.

According to the reproduction permission method according to the sixth aspect of the invention, the encryption information and the encryption record information prior to the first reproduction cannot be changed by the drive device having different information unique to the drive device. After the information and the encrypted recording information have been changed, if they are copied to another recording medium and cannot be decrypted into the recording information without the second information, the recording information recorded on the recording medium cannot be decrypted. Copyright can be protected. In addition, recording media for recording encrypted information based on information unique to the same drive device are manufactured and manufactured collectively.
Since the inspection can be performed, the production cost does not increase.

According to the reproduction permission method according to the seventh aspect of the present invention, the change of the encrypted record information prior to the first reproduction cannot be performed by the drive device having information unique to the drive device, and the change of the encrypted record information cannot be performed. Thereafter, when copied to another recording medium, the recording information cannot be decoded without the second information, so that the copyright of the recording information recorded on the recording medium can be protected. . In addition, a recording medium in which encrypted recording information encrypted with an encryption key based on information unique to the same drive device is recorded can be manufactured and inspected at once, which may increase manufacturing costs. Absent.

According to the reproduction permission method of the eighth invention, after the encryption information or the encryption recording information is changed prior to the first reproduction, when the information is copied to another recording medium, the information unique to each recording medium is obtained. Is not copied and cannot be decoded into recorded information, so that the copyright of the recorded information recorded on the recording medium can be protected.

According to the reproduction permission method according to the ninth aspect, after the encryption information or the encryption recording information is changed prior to the first reproduction, if the recording information is copied to another recording medium and the user is different, the recording information is changed. Therefore, the copyright of the recording information recorded on the recording medium can be protected.

According to the reproduction permission method of the tenth aspect,
After the encryption information or the encryption recording information is changed prior to the first reproduction, when the data is copied to another recording medium, if the computer controlling the drive device is different, it cannot be decrypted into the recording information. The copyright of the recorded information recorded on the medium can be protected.

According to the recording method of the eleventh aspect, when the information is copied to another recording medium, the information unique to the recorded information is not copied, so that the first encryption key cannot be decrypted and the recorded information cannot be reproduced. . Therefore, the copyright of the recording information recorded on the recording medium can be protected. Further, the recording medium having the same recording information has the same other content configuration and can be manufactured and inspected in a lump, so that the production cost does not increase.

According to the recording method of the twelfth aspect, reproduction cannot be performed by a drive device having information unique to the drive device, and the copyright of the record information recorded on the recording medium can be protected. In addition, the recording medium on which the encrypted information is recorded by the same information unique to the drive device has substantially the same other structure, and can be manufactured and inspected in a lump, resulting in an increase in manufacturing cost. There is no.

According to the recording method of the thirteenth aspect, the change of the encrypted recording information prior to the first reproduction cannot be performed by the drive device having information unique to the drive device.
The copyright of the recording information recorded on the recording medium can be protected. Further, the recording medium on which the encrypted recording information encrypted by the encryption key based on the information unique to the same drive device is recorded has substantially the same other structure, and can be manufactured and inspected collectively. Therefore, the production cost does not increase.

According to the recording media of the fourteenth and fifteenth aspects, if the recording information is the same, the production and inspection can be performed collectively, and the recording information can be recorded without increasing the production cost. Copyright can be protected.

According to the recording medium of the sixteenth aspect, reproduction cannot be performed by a drive device having information unique to the drive device, and the copyright of the recorded information can be protected. In addition, since a recording medium in which encrypted information is recorded in the same drive device by using unique information can be manufactured and inspected collectively, the manufacturing cost does not increase.

According to the computer controlled by the program recorded on the recording medium according to the seventeenth aspect, when the information is copied to another recording medium, the information unique to the recorded information is not copied. Cannot be decoded and the recorded information cannot be reproduced. Therefore, the copyright of the recording information recorded on the recording medium can be protected.

According to the computer controlled by the program recorded on the recording medium according to the eighteenth aspect, the information unique to the drive cannot be reproduced by the drive, and the information recorded on the recording medium cannot be reproduced. Copyright can be protected.

According to the computer controlled by the program recorded on the recording medium according to the nineteenth aspect, the encryption information prior to the first reproduction cannot be changed by the drive device having different information unique to the drive device. In addition, after the encryption information is changed, if it is copied to another recording medium,
Without the second information, it is not possible to decrypt the recorded information, so that the copyright of the recorded information recorded on the recording medium can be protected.

According to the computer controlled by the program recorded on the recording medium according to the twentieth aspect, the change of the encryption information and the encryption recording information prior to the first reproduction is performed by using different information unique to the drive device. It cannot be performed by the drive device, and after the encryption information and the encryption recording information are changed, if the information is copied to another recording medium, the recording information cannot be decrypted without the second information. The copyright of the recording information recorded on the recording medium can be protected.

According to the computer controlled by the program recorded on the recording medium according to the twenty-first aspect, the encryption record information can be changed prior to the first reproduction in the drive device having information unique to the drive device. In addition, after the encrypted recording information is changed, if the information is copied to another recording medium and cannot be decrypted into the recording information without the second information, the recording information recorded on the recording medium cannot be decrypted. Copyright of information can be protected.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram for explaining Embodiment 1 of a reproduction permission method according to first and second inventions, a recording method according to an eleventh invention, and a recording medium according to fourteenth and fifteenth inventions.

FIG. 2 is an explanatory diagram for explaining a method of using content recorded on a replaceable recording medium.

FIG. 3 is an explanatory diagram for explaining a manufacturing process of a replaceable recording medium.

FIG. 4 is a reproduction permission method according to the third to fifth, eighth to tenth inventions;
FIG. 21 is an explanatory diagram for describing Embodiment 2 of a recording method according to a twelfth invention and a recording medium according to a sixteenth invention.

FIG. 5 is an explanatory diagram for explaining a method of changing a permission code performed before the content recorded on a replaceable recording medium is used for the first time.

FIG. 6 is an explanatory diagram for explaining a content decryption process performed after a permission code L2 is recorded on a replaceable recording medium.

FIG. 7 is an explanatory diagram for explaining a method of changing a permission code and re-encryption of content.

FIG. 8 is a reproduction permission method according to the third, seventh, and eighth inventions and the first invention.
FIG. 9 is an explanatory diagram for describing a recording method according to a fourth embodiment of the present invention.

FIG. 9 is an explanatory diagram for explaining re-encryption of content performed before the content recorded on the exchangeable recording medium is used for the first time.

FIG. 10 is an explanatory diagram for explaining a content decryption process performed after the re-encrypted content is recorded on a replaceable recording medium.

FIG. 11 is an explanatory diagram for explaining a configuration of an embodiment of a recording medium according to a seventeenth invention.

FIG. 12 is an explanatory diagram for explaining a configuration of an embodiment of a recording medium according to the eighteenth invention.

FIG. 13 is an explanatory diagram for explaining a configuration of an embodiment of a recording medium according to the nineteenth invention.

FIG. 14 is an explanatory diagram illustrating a configuration of an embodiment of a recording medium according to a twentieth invention.

FIG. 15 is an explanatory diagram for explaining a configuration of an embodiment of a recording medium according to the twenty-first invention.

FIG. 16 is an explanatory diagram illustrating an example of a conventional reproduction permission method.

FIG. 17 is an explanatory diagram illustrating an example of a conventional reproduction permission method.

[Explanation of symbols]

10, 20, 30, 40 Recording medium (applicable recording medium) 11, 22, 26, 34 Hardware or software provided with permission code generation algorithm 12, 23, 35, 43, 48 Hardware or software provided with cryptographic algorithm 13, 25, 27, 32, 42, 47, 49 Hardware or software with encryption key generation algorithm 14, 28.33, 46, 50 Hardware or software with decryption algorithm CD1 to CD5 CD-ROM (recording Medium) DD Disk drive PR1 to PR5 Computer program PC Personal computer (computer)

Claims (21)

[Claims] 1. A reproduction permission method for permitting reproduction of recorded information recorded on a recording medium or reproduction of the recorded information by using predetermined information recorded on the recording medium. Reproducing information recorded on the recording medium, and the reproduction of the recorded information requires the specific information. 2. A method according to claim 1, further comprising: encrypting a predetermined first encryption key into first encryption information by using information unique to the recording information recorded on the recording medium; Encrypted into first encrypted recording information, the unique information is recorded in a non-rewritable area on the recording medium, and the first encrypted information and the first encrypted recording information are recorded on the recording medium. It is recorded in a rewritable area, and at the time of reproduction, the first encrypted information is decrypted into a first encryption key using the read unique information, and the decrypted first
Reproducing the first encrypted recording information into the recording information using the encryption key of (1). 3. A reproduction permission method for permitting reproduction of recorded information recorded on a recording medium or reproduced reproduction of the recorded information by using predetermined first information. A reproduction permission method, wherein information specific to the drive device is required to reproduce the recorded information. 4. Encrypting a first encryption key into first encrypted information using the unique information, and encrypting the recording information into first encrypted recording information using a first encryption key. The first encrypted information and the first encrypted recording information are recorded in a rewritable area on the recording medium, and at the time of reproduction, the first encrypted information is converted into the first encrypted information using the unique information. 4. The reproduction permission method according to claim 3, wherein the first encrypted recording information is decrypted into the recording information using the decrypted first encryption key. 5. Encrypting a first encryption key into first encrypted information using the unique information, and encrypting the recording information into first encrypted recording information using a first encryption key. , The first encrypted information and the first encrypted recording information are recorded in a rewritable area on the recording medium, and prior to the first reproduction, the first encrypted information is written using the unique information. Decrypted into a first encryption key and the decrypted first
Is encrypted into second encrypted information using predetermined second information, and the second encrypted information is replaced with the first encrypted information in a rewritable area on the recording medium. At the time of recording and reproducing, the second encrypted information is decrypted into a first encryption key using the second information, and the first encrypted recording information is recorded using the decrypted first encryption key. 4. The reproduction permission method according to claim 3, wherein the reproduction permission is performed. 6. Encrypting a first encryption key into first encrypted information using the unique information, and encrypting the recording information into first encrypted recording information using a first encryption key. , The first encrypted information and the first encrypted recording information are recorded in a rewritable area on the recording medium, and prior to the first reproduction, the first encrypted information is written using the unique information. Decrypted into a first encryption key and the decrypted first
The first encrypted recording information is decrypted into the recording information using the encryption key, and the decrypted recording information is encrypted into the second encrypted recording information using the second encryption key. Second
The second encryption key is encrypted to the third encryption information using the information of
Further, the second encrypted record information is recorded in a rewritable area on the recording medium, and at the time of reproduction, the third encrypted information is decrypted into a second encryption key using the second information, 4. The reproduction permission method according to claim 3, wherein the second encrypted recording information is decrypted into the recording information using the encrypted second encryption key. 7. The unique information is encrypted with a first encryption key, the recording information is encrypted with the first encryption key into first encryption recording information, and the first encryption recording information is The information is recorded in a rewritable area on the recording medium, and prior to the first reproduction, the unique information is encrypted with a first encryption key, and the first encrypted record information is written using the first encryption key. The recording information is decrypted into the recording information, and the predetermined second information is
The recorded information encrypted and decrypted with the encryption key of
And the second encrypted record information is recorded in a rewritable area on the recording medium. At the time of reproduction, the second information is converted to the second cipher record information. 4. The reproduction permission method according to claim 3, wherein the key is encrypted, and the second encrypted recording information is decrypted into the recording information using a second encryption key. 8. The reproduction permission method according to claim 5, wherein the second information is information unique to each recording medium read from the recording medium. 9. The reproduction permission method according to claim 5, wherein the second information is information unique to each user. 10. The reproduction permission method according to claim 5, wherein the second information is information unique to a computer that controls the drive device. 11. Encrypting a predetermined first encryption key into first encryption information using information unique to the recording information to be recorded;
Encrypting the recording information into first encrypted recording information using a first encryption key, recording the unique information in a non-rewritable area, and storing the first encrypted information and the first encrypted recording A recording method on a recording medium, characterized by recording information in a rewritable area. 12. A first encryption key is encrypted to first encryption information using information unique to the drive device recorded in the drive device, and recording information to be recorded is written using the first encryption key. A method for recording on a recording medium, comprising: encrypting first encrypted recording information; and recording the first encrypted information and the first encrypted recording information in a rewritable area. 13. Encrypting information specific to a drive device recorded in the drive device into a first encryption key, and using the first encryption key to convert recording information to be recorded into first encrypted recording information. A method for recording on a recording medium, comprising encrypting and recording first encrypted recording information in a rewritable area. 14. A recording medium applied to the reproduction permission method according to claim 1, wherein information unique to the recorded recording information is recorded. 15. Encryption information encrypted from a predetermined encryption key using the unique information is recorded.
The recording medium according to the above. 16. A recording medium applied to the reproduction permission method according to claim 4, wherein the recording medium is encrypted from a predetermined encryption key using information unique to the drive device recorded in the drive device. A recording medium on which encrypted information is recorded. 17. A recording medium on which a computer program for reproducing recording information recorded on an application recording medium applied to the reproduction permission method according to claim 2 is read, Decrypting the first encrypted information into a first encryption key using information unique to the recording information; and recording the first encrypted recording information using the decrypted first encryption key. Recording a computer program including a step of decoding into information. 18. A recording medium on which a computer program for reproducing recording information recorded on an application recording medium applied to the reproduction permission method according to claim 4 is recorded, wherein said application recording is performed. The first encrypted information is converted to the first encrypted information by using information unique to the drive device recorded in the medium drive device.
A computer program including the steps of: decrypting the first encrypted recording information into the recording information using the decrypted first encryption key; Recording medium. 19. A recording medium storing a computer program for reproducing recording information recorded on an applicable recording medium applied to the reproduction permission method according to claim 5, wherein: Prior to the step of: decrypting the first encrypted information into a first encryption key using information specific to the drive device recorded on the drive device for the applied recording medium; Encrypting the encryption key into second encrypted information using predetermined second information; and rewritable on the applicable recording medium by replacing the second encrypted information with the first encrypted information. Recording in an appropriate area; decrypting the second encrypted information into a first encryption key using the second information during reproduction; and performing first decryption using the decrypted first encryption key. Decrypts the encrypted record information into the record information Recording medium, characterized in that are recorded thereon a computer program comprising the steps that. 20. A recording medium on which a computer program for reproducing recording information recorded on an applicable recording medium applied to the reproduction permission method according to claim 6 is recorded. Prior to the step of: decrypting the first encrypted information into a first encryption key using information specific to the drive device recorded on the drive device for the applied recording medium; Decrypting the first encrypted recording information into the recording information using an encryption key, and encrypting the decrypted recording information into second encrypted recording information using a second encryption key (A) encrypting a second encryption key into third encrypted information using predetermined second information; (b) replacing the third encrypted information with the first encrypted information; Writing the second encrypted record information on the recording medium Recording the data in an available area, decoding the third encrypted information into a second encryption key using the second information during reproduction, and using the decrypted second encryption key. Decrypting the second encrypted record information into the record information. 21. A recording medium on which a computer program for reproducing recording information recorded on an applicable recording medium applied to the reproduction permission method according to claim 7 is recorded. Prior to the first step, encrypting information specific to the drive device recorded in the drive device for the applicable recording medium into a first encryption key; and using the first encryption key to generate first encrypted recording information. Decrypting the recording information into the recording information, encrypting predetermined second information into a second encryption key, and decrypting the decrypted recording information with a second encryption key using a second encryption key. Encrypting into encrypted recording information, recording the second encrypted recording information in a rewritable area on the recording medium, and encrypting the second information into a second encryption key during reproduction. Step and second encryption key Using a second recording medium, characterized in that the encoding and recording information are recorded thereon a computer program comprising the steps of decoding the recorded information.