JP2002260329A - Optical recording medium and read control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical recording medium on which a read control program to protect a copyright and secrecy when the medium is copied is recorded, and to provide a read control program. SOLUTION: The read control program which reads substrate information recorded on an optical recording medium on which information is recorded, judges whether the read substrate information coincides with information set in advance, and stops the read of information recorded on the optical recording medium in a negative case, is recorded on the optical recording medium.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical recording medium on which a read control program for controlling reading of information recorded on an optical recording medium is recorded together with the recorded information, and a read control program.

[0002]

2. Description of the Related Art Recording information on optical recording media such as CDs and DVDs has become widespread today. CD-R, CD-RW, DVD-R, D
VD-RW and the like have become widespread.

[0003]

As described above, with the spread of recordable optical recording media, illegal copying is rampant, and the protection of copyrights of software such as music, images, and programs has become a problem. ing.

An object of the present invention is to provide an optical recording medium and a read control program in which a read control program for controlling reading of information recorded on an optical recording medium is recorded together with the record information.

[0005]

According to the first aspect of the present invention, in an optical recording medium on which information is recorded, substrate information recorded on the optical recording medium is read, and the read substrate information is set in advance. It is determined whether or not the information matches the information. If the information does not match, a read control program for stopping reading of the information recorded on the optical recording medium is recorded.

[0006] In the invention of claim 2, the read control program automatically starts operation when reading of information from the optical recording medium is started. In the invention according to claim 3, the preset information is a part or all of the board information.

In the invention according to claim 4, the preset information is a start time of a lead-in area, a start time of a lead-out area, and a part or all of parameters of a recording strategy.

[0008] In the invention of claim 5, the preset information is encrypted and set, and the read control program decrypts the encrypted information to obtain the preset information.

In the invention according to claim 6, a key for decrypting the encrypted information is the substrate information read from the optical recording medium.

According to a seventh aspect of the present invention, there is provided a read control program for controlling reading of information recorded on an optical recording medium, comprising: reading substrate information recorded on the optical recording medium; It is determined whether the information matches the preset information. If the information does not match, the reading of the information recorded on the optical recording medium is stopped.

[0011] In the invention according to claim 8, the read control program automatically starts operation when reading of information from the optical recording medium is started. In the ninth aspect, the preset information is a part or all of the board information.

According to a tenth aspect of the present invention, the predetermined information includes a start time of a lead-in area,
The start time of the lead-out area and part or all of the parameters of the recording strategy.

In the eleventh aspect of the present invention, the preset information is encrypted and set, and the read control program decrypts the encrypted information to obtain the preset information.

In a twelfth aspect of the present invention, a key for decrypting the encrypted information is the substrate information read from the optical recording medium.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. FIG. 1 is an operation flowchart of the first embodiment of the present invention. Generally, in an optical disk on which information is recorded by irradiating a laser beam, a guide groove meandering at 22.05 KHz is formed at the time of manufacturing the optical disk, and the substrate information is recorded in a meandering manner of the guide groove after being frequency-modulated at ± 1 KHz. ing.

As shown in FIG. 2, the physical format of the optical disc is composed of a lead-in area, a program area and a lead-out area. A start time, recording strategy parameters, and the like are recorded.

The lead-in start time is set to a time unique to each manufacturer as a vendor code, and the lead-out start time is set to a value corresponding to the recording capacity. These board information cannot be copied to another optical disk. .

According to the present invention, substrate information of an optical disk on which software whose copyright is to be protected is recorded is different from substrate information of a generally sold optical disk.

A read control program is also recorded on an optical disk on which software whose copyright is to be protected is recorded. When an optical disk reproducing apparatus reads software recorded on an optical disk, the read control program is read. The program is automatically read and operation starts.

Next, a first embodiment of the present invention will be described with reference to FIG. In step S1, the board information recorded on the optical disk is read, and the process proceeds to step S2.

In step S2, it is determined whether or not the board information read in step S1 matches the board information set in the read control program. If the determination is YES, the flow advances to step S3 to record the data on the optical disk. The reading of the stored information is started.

If it is determined in step S2 that they do not match, the process proceeds to step S4, in which information reading is disabled, and the process proceeds to step S5 to stop the reading operation from the optical disk and terminate.

That is, when the copied information is recorded, the board information read in step S1 is different from the board information set in the read control program, and the determination in step S2 becomes NO, and the recorded information is recorded. Information cannot be read.

As the board information for determining whether or not they match in step S2, the determination may be made by using all of the board information or by using a part of the board information. Is also good.

Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, a step S1 is performed between steps S1 and S2 of the first embodiment described with reference to FIG.
0 and S11 are inserted.

In the first embodiment, when it is determined as NO in step S2 and the read operation is stopped, the substrate information set in the read control program is read from the optical disk substrate information to easily change the setting. Can be. In the second embodiment, the set board information cannot be easily changed.

Therefore, in the read control program, the substrate information is encrypted and recorded in advance using the substrate information of the optical disk as an encryption key, and a decryption program for decrypting the encrypted substrate information is also recorded. The encryption method may be a commonly used DES method, and RAS
The method may be used, and the method is not limited to these.

In step S10, a decryption key is generated from the board information read in step S1. Step S1
In step 1, the encrypted substrate information is decrypted using the decryption key generated in step S10.

In step S2, it is determined whether the board information read in step S1 matches the board information decoded in step S11. Although the decryption key is generated from the board information read from the optical disc in step S10 of the second embodiment, the operator may input the decryption key from the input unit.

[0030]

As described above, the board information recorded on the optical recording medium is read, and it is determined whether or not the read board information matches the set board information. Since the reading operation of the information recorded on the recording medium is stopped, it is possible to protect the copyright when copied and the confidentiality of the recorded information.

[Brief description of the drawings]

FIG. 1 is an operation flowchart of a first embodiment.

FIG. 2 is a physical format of an optical disc for explaining board information.

FIG. 3 is an operation flowchart of the second embodiment.

Claims (12)

[Claims] 1. In an optical recording medium on which information is recorded, substrate information recorded on the optical recording medium is read, and it is determined whether or not the read substrate information matches predetermined information. An optical recording medium characterized by recording a read control program for stopping reading of information recorded on the optical recording medium when not performed. 2. The optical recording medium according to claim 1, wherein said read control program automatically starts operation when reading of information from said optical recording medium is started. 3. The optical recording medium according to claim 1, wherein the preset information is a part or all of the substrate information. 4. The method according to claim 1, wherein the preset information is a start time of a lead-in area, a start time of a lead-out area, or a part or all of parameters of a recording strategy. Optical recording medium. 5. The method according to claim 1, wherein the preset information is encrypted and set, and the read control program decrypts the encrypted information to obtain the preset information. The optical recording medium according to claim 1, 2, 3, or 4. 6. The optical recording medium according to claim 5, wherein a key for decrypting the encrypted information is the substrate information read from the optical recording medium. 7. A read control program for controlling reading of information recorded on an optical recording medium, comprising: reading substrate information recorded on the optical recording medium; A read control program, which determines whether or not the information matches, and when the information does not match, stops reading information recorded on the optical recording medium. 8. The non-transitory computer-readable storage medium according to claim 6, wherein the non-transitory computer-readable storage medium is configured to automatically start operation when information is read from the optical recording medium. 9. The non-transitory computer-readable storage medium according to claim 6, wherein the preset information is a part or all of the substrate information. 10. The information according to claim 6, wherein the preset information is a start time of a lead-in area, a start time of a lead-out area, and a part or all of parameters of a recording strategy. Read control program. 11. The method according to claim 11, wherein the preset information is encrypted and set, and the read control program decrypts the encrypted information to obtain the preset information. The read control program according to claim 6, 7, 8, or 9. 12. The read control program according to claim 11, wherein a key used for decrypting the encrypted information is the substrate information read from the optical recording medium.