JPH0721697A - Method for protecting information processor, optical disk and data - Google Patents

Abstract

PURPOSE:To protect a program recorded on an original disk, for instance, with respect to the method for protecting an information processor, an optical disk and data. CONSTITUTION:A discoid recording medium 3 is formed by recording an identification data ID in a management data recording area ARR which is formed as a preformat and difficult to be rewritten. Then, when the prescribed identification data ID is not recorded, data processing of a data recording area ARP is stopped.

Description

Detailed Description of the Invention

[0001]

【table of contents】

 The present invention will be described in the following order. Field of Industrial Application Conventional Technology (FIGS. 4 and 5) Problem to be Solved by the Invention Means for Solving the Problem (FIG. 1) Action (FIG. 1) Embodiment (1) First Embodiment (FIG. 1 and FIG. 2) (2) Second embodiment (FIG. 3) (3) Other embodiments Effect of the invention

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing apparatus, an optical disk and a data protection method, and can be applied to protect a program recorded on an original disk, for example.

[0003]

2. Description of the Related Art Conventionally, optical disc devices have been proposed which are capable of reproducing recording media having different properties. That is, this kind of recording medium is a read-only optical disk created by applying a method similar to that of a compact disk, and a magneto-optical recording medium capable of recording and reproducing desired data by applying a thermomagnetic recording method. There are a composite type optical disk that is a combination of a disk, a magneto-optical disk, and an optical disk.

Among them, as shown in FIG. 4, in a magneto-optical disc, an information area formed on a disc surface is divided into a lead-in area, a recordable area and a lead-out area, and desired data is recorded in the recordable area. To enable thermomagnetic recording. On the other hand, the lead-in area and the lead-out area are formed by pre-formatting in advance, and the lead-in area is adapted to record the type of the magneto-optical disk and the information specifying the recordable area. .

On the other hand, the recordable area is UT
It is divided into an OC area and a program area, and management data of data recorded in the program area can be recorded in the UTOC area. As a result, when recording / reproducing a magneto-optical disk, the optical disk device first reproduces the lead-in area to detect various data necessary for recording / reproducing, and accesses the UTOC area and the program area based on the detection result. UT
The program area is recorded and reproduced based on the management data of the OC area.

Further, the optical disk device is adapted to update the management data of the UTOC area when the data in the program area is updated, and when the data is recorded in the program area, so that the U data is reproduced at the subsequent reproduction.
The data in the program area can be reproduced by referring to the TOC area.

On the other hand, as shown in FIG. 5, a read-only optical disc is formed by pre-formatting the entire information area. In addition, the playback-only optical disk is a lead-in area that leads to the information area.
It is divided into a program area and a lead-out area, and in the lead-in area, information such as the type of the disk, as in the case of the magneto-optical disk, and the UT
While data corresponding to OC is recorded, desired data is recorded in the program area.

Thus, when reproducing a reproduction-only optical disk, the optical disk device reproduces the lead-in area as in the case of reproducing a magneto-optical disk, and then accesses the program area based on the reproduction result. It is designed so that desired data can be reproduced. As a result, a read-only optical disk can be mass-produced by forming a stamper, for example, a computer program can be supplied in large quantities, while a magneto-optical disk can be used as an external memory of the computer. It is adapted to record a large amount of data when applied to a device or the like.

[0009]

When supplying a computer program using this type of recording medium, the program may be illegally copied. In this case, a method of prohibiting this kind of illegal copy by copy protection like a program supplied via a floppy disk or the like is conceivable, but it is not perfect.

The present invention has been made in consideration of the above points, and an object thereof is to propose an information processing apparatus, an optical disk, and a data protection method capable of effectively avoiding this kind of illegal copy. .

[0011]

In order to solve such a problem, according to the present invention, a predetermined disk-shaped recording medium 3 is irradiated with a light beam to record desired processing data on the disk-shaped recording medium 3, and In the information processing apparatus 1 that reproduces the processing data recorded on the disk-shaped recording medium 3 and executes the predetermined processing procedure P based on the processing data, it is difficult to rewrite the recording area of the disk-shaped recording medium 3 with the data recording area ARP. The information processing apparatus 1 divides the management data recording area ARR, records the processing data in the data recording area ARP, and preformats and records the identification data ID corresponding to the processing data in the management data recording area ARR. When reproducing and executing the processing procedure, the management data recording area ARR is accessed to detect the identification data ID corresponding to the processing data, If not detect the corresponding identification data ID based on the detection result, to abort the procedure.

Further, in the second invention, the recording area is divided into a data recording area ARP and a management data recording area ARR that is difficult to rewrite, and recording / reproducing is performed so that predetermined processing data can be recorded in the data recording area ARP. A possible area is formed, and the identification data ID corresponding to the processing data is preformatted and recorded in the management data recording area ARR.

Further, in the third aspect of the present invention, in the method of protecting the data P recorded and supplied on the disk-shaped recording medium 3, rewriting of the disk-shaped recording medium 3 formed by pre-formatting when the data P is processed. The difficult management data recording area ARR is accessed at a predetermined processing timing, and the processing is stopped when the predetermined identification data ID is not recorded in the management data recording area ARR.

[0014]

That is, since the management data recording area ARR which is formed by pre-formatting and is difficult to rewrite is difficult to make and copy, the disk-shaped recording medium 3 is formed.
When reproducing and processing the recorded data recorded in (1), if the corresponding identification data ID cannot be detected, the processing procedure can be stopped to protect this kind of recorded data.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

(1) First Embodiment In FIG. 1, reference numeral 1 denotes a computer, which is adapted to execute various processes using a built-in optical disk device 2. In the case of this embodiment, a reproduction-only optical disk is used. The program P is supplied to the computer 1 by using the disk 3. That is, when the loaded recording medium is the optical disc 3, the optical disc device 2 irradiates the optical disc 3 with a light beam to receive the reflected light, and the optical disc 3 receives the reflected light based on the change in the amount of the reflected light. Play the recorded data.

As a result, the computer 1 stores the program P recorded in the optical disk 2 in the memory 4 by reproducing the optical disk 3 and storing the reproduced data in the memory 4, and executes the program P. It is designed to get you. At this time, the program P is adapted to first execute the ID confirmation processing, and thus, if the program is illegally copied, it will not operate.

That is, the optical disc 3 of this type has a feature that the inner lead-in area ARR is pre-formatted to make it difficult to rewrite, and the optical disc device does not directly output the reproduction data to the pre-formatted area. is there. Therefore, the optical disc 3 has a feature that it is difficult to make and copy the pre-formatted area.

Further, the optical disc 2 forms a PTOC in the lead-in area ARR and divides the PTOC into 32 sectors, and each sector has data specified in advance according to the standard, and further reserves. Desired data can be recorded in the sector.

For example, as shown in FIG. 2, the PT of sector 3
In OC, a header is first formed, then a data area is formed, and pointers (P-TCD1, P-TCD2, ...) Of data recorded in the program area ARP are formed.
..., P-TCD254, P-TCD255) are recorded, and then the catalog number (Catalo
gue Number), pointer (P-TCD1, P-TCD)
2, ..., P-TCD254, P-TCD255), a copyright statement (ISRC) regarding the data specified by the data is recorded.

Correspondingly, the optical disk 3 points this pointer (P-TCD1, P-TCD2, ..., P-TCD25) to the PTOC of the sector assigned to the reserve.
4, P-TCD255), the identification data ID corresponding to the data specified by P-TCD255) is recorded. Here, the identification data ID is an author, manufacturer, seller, number of the type and contents of a program or the like made of corresponding data,
It is formed by combining characters, symbols and the like. Accordingly, in the computer 1, in the ID confirmation process, the corresponding PTOC is accessed to detect the presence or absence of the identification data ID, and if the identification data ID is not recorded here, the execution of the subsequent program is stopped.

That is, in this type of optical disc 2,
This pre-formatted P made difficult to rewrite.
The TOC has a characteristic that it is difficult to copy and copy it, whereas the program area can be copied. Therefore, when the identification data ID is not recorded, the recording medium loaded in the optical disc device 2 can be determined to be a duplicate of the optical disc 3.

Incidentally, in this type of optical disk device,
Although it is physically possible to copy and copy to the lead-in area, in practice, it is necessary to prepare large-scale equipment, which is not practical. As a result, the computer 1 cancels the processing in the case of a duplicate, and the program P
Can be protected from unauthorized copying.

On the other hand, in this type of program P, it is necessary to secure a backup disk. Therefore, in this optical disk 2, a magneto-optical disk capable of recording and reproducing for backup is supplied, and the magneto-optical disk for backup is provided at the same position as the optical disk 3 in the lead-in area. The same identification data ID as 3 is recorded.

Thus, the user can receive the supply of the magneto-optical disk for the backup and copy the data of the optical disk 3 to the magneto-optical disk to form the backup disk.

At this time, there is a possibility that the optical disc 3 may be illegally copied by copying the data of the different types of optical discs 3 to the back-up magneto-optical disc that can be easily supplied. Therefore, in the ID confirmation processing, when the identification data ID is detected from the storage medium, the computer sends the identification data to the program P.
It is determined whether or not it is a correct identification data ID corresponding to.

Thus, in the computer 1, even if the programs of the optical disk 3 are illegally copied to different types of back-up magneto-optical disks, the programs recorded in the optical disk 3 can be protected.

According to the above configuration, the identification data is recorded in the lead-in area where copying is difficult, and when the program recorded in the program area is executed, the identification data is referred to and the processing is executed, whereby the optical disc is processed. The program recorded in can be surely protected.

(2) Second Embodiment In this embodiment, as shown in FIG. 3, the optical disk 6 is used.
In addition to the program P, the image data DA to be processed by the program P is recorded, and when the program P is executed to process the image data DA, the identification data ID recorded in the PTOC is referred to. Image data DA
When the correct identification data ID corresponding to can not be detected,
Stop processing.

Even with the configuration shown in FIG. 3, the same effect as that of the first embodiment can be obtained, and this type of image data can be protected.

(3) Other Embodiments In the above embodiment, the author of the program,
Although the case where the identification data is formed by combining the manufacturer, the seller, the numbers, characters, and symbols indicating the type and content has been described, the present invention is not limited to this, and any one of them may be combined as necessary. When used, various identification data can be widely applied. Further, at this time, this identification data may be encrypted and recorded.
One program may refer to this identification data multiple times.

Further, in this case, different identification data may be assigned to the identification data of the original disk and the identification data of the recording medium for which copying is permitted, and so-called grandchild copying may be prohibited.

Further, in the above-mentioned embodiment, the case where the illegal copy is prohibited for the read-only optical disc 3 is described, but the present invention is not limited to this, and the illegal copy is prohibited for the recordable and reproducible magneto-optical disc. In this case, it can be widely applied to the case where illegal copying is prohibited for a composite type recording medium.

Further, in the above embodiment, the PTOC
However, the present invention is not limited to this, and is widely applied to various disc-shaped recording media and pre-formatted to the disc-shaped recording medium to record the identification data. be able to.

Further, in this embodiment, the case where the execution of the program is simply stopped based on the identification data has been described, but the present invention is not limited to this, and in addition to this, the identification data is registered in the computer. It is also possible that only the specific optical disc is reproduced on the computer side. By doing so, copying of the program area can also be prohibited.

[0036]

As described above, according to the present invention, the disc-shaped recording medium is formed by recording the identification data in the management data recording area formed by pre-formatting and which is difficult to rewrite, and the predetermined identification data is recorded. By stopping the data processing in the data recording area when it is not in use, it is possible to protect the data recorded in the data recording area by effectively utilizing the characteristic that it is difficult to copy this kind of management data recording area. It is possible to obtain an information processing apparatus, an optical disk, and a data protection method that can be performed.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a computer according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining the operation.

FIG. 3 is a schematic diagram showing the second embodiment.

FIG. 4 is a perspective view showing a recordable / reproducible magneto-optical disk.

FIG. 5 is a perspective view showing a read-only optical disc.

[Explanation of symbols]

1 ... Computer, 2 ... Optical disk device, 3,6 ...
… Optical disk, 4… Memory.

Claims (3)

[Claims] 1. A predetermined disk-shaped recording medium is irradiated with a light beam, desired processing data is recorded on the disk-shaped recording medium, and the processing data recorded on the disk-shaped recording medium is reproduced to perform the processing. In an information processing apparatus that executes a predetermined processing procedure based on data, the disk-shaped recording medium divides a recording area into a data recording area and a management data recording area that is difficult to rewrite, and the processing data is stored in the data recording area. Pre-formatted and recorded identification data corresponding to the processing data in the management data recording area, and the information processing apparatus reproduces the recording data and executes the processing procedure, the management data recording area To detect the identification data corresponding to the processed data, and detect the corresponding identification data based on the detection result. If obtained not, the information processing apparatus, characterized in that the stop the procedure. 2. A recording area is divided into a data recording area and a management data recording area that is difficult to rewrite, and a recordable and reproducible area is formed in the data recording area so that predetermined processing data can be recorded. An optical disk in which identification data corresponding to the above-mentioned processed data is preformatted and recorded in advance in a management data recording area. 3. A method of protecting data recorded and supplied on a disk-shaped recording medium, wherein a management data recording area of the disk-shaped recording medium, which is formed by pre-formatting and is difficult to rewrite, is defined when the data is processed. The method of protecting data, characterized in that the access is made at the processing timing, and the processing is stopped when the predetermined identification data is not recorded in the management data recording area.