JP2000331419A - Recording medium which prevents the use of unlawfully duplicated program or data on computer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the installation of a duplicated application program from its duplicated recording medium by making plural sectors that are other than the sectors, in which the application program and an install program are recorded, into special sectors having special data that make a reading device of a recording medium to generate an error. SOLUTION: In a CD-R, a lead-in of a CD-ROM20, a pregap and a PVD are successively duplicated. In the CD-ROM20, special sectors are arranged next to the PVD having special data. When the special sectors are accessed by a reading device, it generates an error message and a duplicating device responds to the message and stops a duplicating process to the CD-R of the CD-ROM20. Thus, the program and the data recorded outside the position, where the special sectors of the CD-ROM20 are recorded, are not duplicated into the CD-R, Thus, an install program does not exist in the CD-R obtained by duplication.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium for preventing a computer or a computer from using (for example, installing) an illegally copied program or data.

[0002]

2. Description of the Related Art CD-ROMs, which have a relatively large recording capacity of about 650 MB and are inexpensive to manufacture, are widely used as media for recording computer programs and data. In recent years, a medium (C) for duplicating a program or data recorded on a CD-ROM as it is
Devices such as DR (Compact disk Recordable) and devices for copying (CD-R drive and the like) are widely used. For this reason, it is no longer difficult for ordinary users to copy the contents (programs and data) of the CD-ROM.

Further, the recording capacity of a CD-ROM (about 650)
Computers (especially personal computers) with hard disks having storage capacities exceeding MB) have become popular. A hard disk having a storage capacity that exceeds the storage capacity of a CD-ROM includes a CD-ROM.
It is also possible to copy all of the contents of

In such a situation, a CD-ROM
It is difficult to prevent copying of the contents. However, even if copying cannot be prevented,
For example, if the copied program cannot be installed on the computer, it cannot be used eventually, so that the contents of the original CD-ROM can be substantially protected.

[0005]

DISCLOSURE OF THE INVENTION The present invention relates to a method for copying a copied application program from a copy recording medium to a computer even if the application program recorded on the original recording medium is copied to a copy recording medium such as a CD-R. It is an object of the present invention to provide an original recording medium that can not be installed on a personal computer.

Further, according to the present invention, an application program recorded on an original recording medium is hard-coded.
The object of the present invention is to provide an original recording medium that can prevent a duplicated application program from being installed in a computer from the duplicated recording medium even if the application program is duplicated on a large-capacity recording medium such as a disk. It is.

Further, the present invention more generally relates to a method for copying a program or data recorded on an original recording medium even if the program or data is copied to a CD-R or the like or a hard disk. An object of the present invention is to provide an original recording medium that can be made unusable on a computer.

[0008] A recording medium (original recording medium) according to the present invention is provided with a plurality of sectors defined as a unit area including position information on the recording medium, and an application recorded over one or more sectors is provided.
An installation program for installing the program on a computer is recorded over one or more sectors. One or more sectors other than the sector in which the application program and the installation program are recorded are special sectors having special data that causes an error in the reading device of the recording medium. The installation program includes a description of the position information of the special sector, further attempts to access the special sector according to the description of the position information of the special sector, and executes the application program if no error occurs from the reading device. Installation of the application is stopped, and if an error occurs in the reader, the application
And a process for continuing the installation of the program.

The original recording medium includes a recording medium such as a CD-ROM. The original recording medium will cause the reader to generate an error when accessed by the reader,
It contains one or more special sectors.

[0010] The special sector is a kind of defective sector. The following are examples of special sectors. When the recording medium is an optical recording medium, a pit representing data obtained by encoding a signal of a predetermined frequency is formed in a portion excluding a synchronization signal recording region, and a pit is formed in a portion excluding a synchronization signal recording region. Are not formed, pits having irregular dimensions are formed in portions other than the synchronization signal recording area, and pits indicating data other than data indicating a predetermined mode are formed in a header area. Things.

[0011] The application program recorded on the original recording medium is installed on the computer according to the installation program recorded on the same original recording medium. The installation program recorded on the original recording medium includes a description of the position information of the special sector, and can access the special sector according to this description. In the case of the original recording medium,
If a special sector is accessed by the installation program, the reader will generate an error. At this time, the installation program continues installation of the application program. An application program is installed on the computer.

When an attempt is made to copy the contents of an original recording medium to another recording medium (hereinafter referred to as a copy medium) using a duplication device, a reading device in the duplication device accesses a special sector (defective sector). Since an error sometimes occurs, even if the application program and the installation program are duplicated, at least the special sector cannot be duplicated on the copy medium. The copy medium will not have any special sectors.

When an application program copied to such a copy medium is to be installed in a computer, the installation program copied to the copy medium accesses the position of the special sector. In addition, since there is no special sector in the copy medium, the reading device does not generate an error.
Therefore, the installation program stops installing the application program. No application programs are installed on the computer.

According to the present invention, even if the application program on the original recording medium is duplicated and the copy medium is created, the application program cannot be installed in the computer by using the copy medium. Since the application program that cannot be installed cannot be used after all, the contents of the original recording medium can be protected.

When the original recording medium is a disk-shaped recording medium, the special sector may be recorded inside the recording position of the application program. In general, a copying apparatus copies the contents of an original recording medium from the inside to the outside as it is. Generally, in such a copying apparatus, if a special sector (defective sector) is included in the original recording medium, the copying operation is stopped when the special sector is detected. At this point, the duplication of the original recording medium is interrupted, and the duplication of the application program itself is not performed.

If the special sector is recorded inside the recording position of the installation program, even if the application program is duplicated,
Since the installation program is not copied, the application program cannot be installed on the computer using the copy medium.

The original recording medium can be more generally defined as a medium that can prevent unauthorized use of data and programs of the original recording medium. The recording medium according to the present invention is provided with a plurality of sectors defined as a unit area including position information on the recording medium,
A program for a preparation process for enabling a program or data recorded over one or more sectors is recorded over one or more sectors.
One or more sectors other than the sector in which the program or the data and the program for the preparatory processing are recorded are special sectors having special data in which the reading device of the recording medium causes an error. The program for the preparatory processing includes a description of the position information of the special sector, further attempts to access the special sector according to the description of the position information of the special sector, and if no error occurs from the reading device, the program Alternatively, the computer controls the computer to stop the preparatory processing for making the data usable and to continue the preparatory processing for making the program or data usable when the reading device generates an error.

The program for the preparatory processing includes:
There are installation programs and decryption programs described above. For example, it is assumed that encrypted data is recorded on an original recording medium, and a decryption program for decrypting the encrypted data is recorded as a program for preparation processing. When the original recording medium is used, the special sector is accessed by the decryption program and an error occurs from the reading device, so that the preparation process is continued, that is, the encrypted data is decrypted. If the copy medium is used, the special sector cannot be accessed, so that no error occurs from the reading device, and the preparatory processing, that is, the decryption of the encrypted data is stopped. The contents of the original recording medium are substantially protected.

[0019]

Embodiment An application program and an installation program are recorded on a CD-ROM in this embodiment. Installation means CD-RO
CD-RO according to M installation program
Transfer the programs and data in M to the hard disk of the computer system and record the directory information in the main directory. This CD
-ROM is a CD-R (Compact Disk Recordable) application program recorded on a CD-ROM.
For example, even if it is copied as it is, it has a data structure that can prevent an application program from being installed in a computer system from the CD-R or the like. This CD-ROM stores an application program of the CD-ROM on a hard disk (HD).
D) Even if the CD-ROM is copied on a file-by-file basis without using the CD-ROM installation program, the CD-ROM on which the application program is further copied from the HD device or the HD device is copied.
It has a data structure that can prevent application programs from being installed in a computer system from R or the like.

FIG. 1 shows a data recording surface of a CD-ROM. FIG. 2 shows a data arrangement structure of the CD-ROM.

Helical pits (not shown) are formed on the substrate of the CD-ROM 20. CD by pit
-ROM 20 stores programs and data.

The CD-ROM 20 includes a plurality of sectors (indicated by sectors # 1 to #n). The sector is CD-
This is a recording area that can be used in the ROM 20 and whose position can be specified.

When the CD-ROM 20 is viewed from the viewpoint of the data arrangement structure, a lead-in (area) (sector # 1), a user area (sector # 2 to sector # n-1), a read-out (area) (sector) ♯n). Lead
The in (sector # 1) is located inside the disk, and the lead-out (sector #n) is located outside. The first sector (sector #) of the user area (sector # 2 to sector # n-1)
2) is a pre-gap for buffering. User programs and data are described in sectors (sector # 3 to sector # n-1) excluding the pre-gap in the user area. A unit called a session or a track may be created by grouping a plurality of sectors.

The data arrangement structure of sectors # 4 to #n differs depending on the mode. Mode 0, Mode 1 and Mode 2
There are three modes. The data arrangement structure of the sector is the same in mode 0 and mode 2, which is shown in FIG. FIG. 4 shows the data arrangement structure of the mode 1 sector. 3 and 4, the numbers in parentheses indicate the number of bytes.

The mode 0 sector is used as a dummy sector. Mode 2 sectors are generally used for recording image data, compressed data, and the like. In these modes, each sector consists of a synchronization signal recording area, header area, user data area, and EDC (Error Detecting).
Code) area, ECC (Error Correcting Code) area, and control byte (Control Byte) area.

In the synchronization signal recording area, a synchronization signal (synchronization pattern) for finding the head of a sector is described.

In the header area, time information (minute, second, frame) indicating the recording position of the sector and data indicating the mode type (either mode 0 or mode 2) are described. The recording position of the sector can be specified based on the time information described in the header area.

In the user data area, user programs and data are described. This user data area contains 23
36 bytes of programs and data can be described.

An error detection code is described in the EDC area, and an error correction code is described in the ECC area. The codes described in these areas are used for detecting and correcting the presence or absence of an error in a program or data in the user data area (double error correction).

In the control byte area, time information indicating the recording position of the sector in the track (overlapping with the time information in the header area) and the like are described.

The sector of mode 1 is generally used for recording a program and data for a computer. FIG.
In the same manner as in the mode 0 and 2 sectors, the mode 1 sector includes a synchronization signal recording area, a header area, a user data area, an EDC area (referred to as an “EDC area (392)”), and an ECC area. And the control byte area. In the header area, data indicating a mode 1 sector is described. In addition, the sector of mode 1 has an EDC area between its user data area and EDC area (392).
Area (referred to as “EDC area (4)”), a blank area, a P parity area, and a Q parity area. EDC area (4),
288 bytes are used for the blank area, P parity area, and Q parity area. Therefore, the user data area of the mode 0 and 2 is stored in the user data area of the mode 1 sector.
2048 bytes of programs and data are recorded, which is 288 bytes less than the data area.

In the mode 1 sector, the EDC area (39
The codes described in 2) and the ECC area are used to detect and correct the presence or absence of errors in programs and data described in the user data area, EDC area (4), blank area, P parity area, and Q parity area. Used. EDC area
(4) The data described in the P parity area and the Q parity area are used for detecting and correcting the presence or absence of an error in the program or data described in the user data area. The ability to correct programs and data described in the user data area of the mode 1 sector is higher than that of the modes 0 and 2 sectors (triple error correction).

Sectors # 1 to # 2 included in CD-ROM 20
n, sector # 1 (lead-in), sector # 2
(Pre-gap) and sector #n (lead-out) data arrangement structure is mode 0 (or mode 2)
Is the same as Dummy data that has no meaning is described in the user data area of sector # 1 (lead-in), and the CD-R is written in its control byte area.
TOC (Table Of Cont) showing the outline (table of contents) of the contents of OM20
ent) is described. Dummy data is described in the user data area of sector # 2 (pre-gap).
Dummy data having no meaning is described in the user data area of the sector #n. In sector # 3, generally P
CD-RO such as VD (Primary Volume Discriptor)
Important data regarding M is described. Therefore, the data arrangement structure of sector # 3 is the same as that of mode 1.

FIG. 5 shows a special sector (defective sector) included in the CD-ROM 20.

One of a plurality of sectors included in the user area is a special sector. Special sector is CD-R
CD-R for reading programs and data recorded in OM
The OM drive (reading device) is a sector having special data for outputting an error message. Examples of special sectors include:

Excluding the synchronization signal recording area (header area in modes 0 and 2, user data area, EDC
Area (392), ECC area and control byte area, or header area, user data area, EDC area (4), blank area, P parity area in mode 1
A signal of a predetermined frequency in the Q parity area, EDC area (392), ECC area, and control byte area (the frequency may be any level as long as it can be recorded, such as a sine wave having a constant frequency, a pulse signal, etc.) A pit representing data obtained by encoding is formed (recorded). Pits are formed (recorded) except for the sync signal recording area
It has not been. A pit having an unspecified size (for example, longer or shorter than the specified size) is formed (recorded) in a portion excluding the synchronization signal recording area. Data other than the data representing mode 0, mode 1 or mode 2 is recorded in the header area (pits representing data are formed).

A state in which data obtained by encoding a signal of a predetermined frequency is recorded, a state in which no pit is formed, a state in which a non-defined pit is formed, mode 0, mode 1 or mode 2 It is said that special data is recorded or that a special sector has special data, including all states where data other than data is recorded.

FIG. 6 shows the file structure of the CD-ROM 20.
It is shown including special data.

The CD-ROM 20 includes a lead-in, a pre-gap, a PVD (Primary Volume Descriptor),
Special data and files 1 to 4 are recorded.

The playback time of the PVD (Primary Volume Descriptor) is 00 minutes 02 based on the standard for CD-ROM.
Recording is started from a position corresponding to 16 frames per second (00: 02.16) (1 second corresponds to 75 frames). The PVD stores information on data and files stored in the CD-ROM 20, such as the total data amount of the CD-ROM 20, a path table, a root directory, and the like, and information on an overview of programs and data recorded on the CD-ROM 20. Is stored.

File 2 is a program file in which an application program is described. File 3 and file 4 are data files in which data (data 1 and data 2) used for this application is described. The application programs include those that realize a word processing function in a computer system, those that realize a spreadsheet function, and those that realize other processes.

File 1 is an installation file used to install an application program (file 2) and application data (file 3 and file 4) into a computer system.
It is a program file that describes a program.
The installation program consists of multiple DLLs (Dynamic Linnk
Library: Dynamic Link Library) (not shown).

If the length of these programs and data exceeds the number of bytes (2336 bytes or 2048 bytes) of the user data area of one sector, they are recorded over a plurality of sectors. A special sector having special data is located between the PVD and the file 1 on the CD-ROM 20, and has a reproduction time of 00:03:00 frame (00: 03.00)
Recording is started from a position corresponding to. The installation program describes the position information of the 00:03:00 frame.

FIG. 7 shows a CD-R (Compact Disk Recordable).
e) A block diagram showing an electrical configuration of a general computer system (personal computer) having a drive.
The above-described CD-ROM is shown as a CD-ROM 20 in FIG.

The computer system includes a computer (CPU) 10, an input device (keyboard, mouse, etc.) 11 for receiving an input, a display device 12 for displaying processing results, a work area, a buffer A memory 13 for providing an area or the like, a CD-ROM drive 14 for reading programs and data recorded on a CD-ROM 20 (or a general CD-ROM), and a CD-R for reading / writing programs and data on a CD-R 17 A drive 16 and a hard disk (HD) device 18 for reading / writing programs and data from / to the hard disk are connected. The HD device 18 stores a program such as an operating system (OS) for controlling the entire computer system through the CPU 10.

The computer system converts application programs and data (files 2, 3 and 4) recorded on the CD-ROM 20 according to an installation program (file 1) operating on an OS (operating system). Can be stored in a usable state in the HD device 18 of the computer system. For example, compressed application programs and data are stored on a CD-ROM.
If they are stored in the folder 20, they are decompressed (decompressed) and transferred to the HD, stored in a predetermined location in the HD (as managed by the main directory), and a directory is created.

FIG. 8 is a block diagram schematically showing a portion of a reproducing circuit of the CD-ROM drive 14.

Pick-up of CD-ROM drive 14
The data read by 30 is input to the decoder 31. A program and data represented by 8-bit data are recorded in the CD-ROM 20 after being modulated into 14-bit data (EFM: Eight Forteen Modula).
tion). The decoder 31 demodulates the 14-bit data to the original 8-bit data.

The 8-bit data output from the decoder 31 is input to the synchronization signal detection circuit 32. Sync signal detection circuit
Reference numeral 32 detects a synchronization signal (synchronization pattern) described in the sector and finds the head of data described in the sector.

The 8-bit data output from the synchronization signal detection circuit 32 is input to the descrambling processing circuit 33.
The programs and data recorded on the CD-ROM 20 are scrambled for each sector, and the descramble processing circuit 33 returns the data of the scrambled sector to the original data. Further, the descramble processing circuit 33
Described in the user data area using the error detection code in the EDC area (392) and the error correction code in the ECC area (for modes 0 and 2), or in the user data area, EDC
Detection and correction of the presence or absence of an error in the program or data described in the area (4), the blank area, the P parity area, and the Q parity area (in the case of mode 1) are performed.

The data output from the descramble processing circuit 33 is input to the mode detection circuit 34. Mode detection circuit
34 determines whether the input sector is a sector having a data arrangement structure of mode 1 or a sector having a data arrangement structure of mode 0 or mode 2, based on the description of the header area of the sector.

When it is determined that the sector has the mode 0 or mode 2 data arrangement structure, the data described in the user data area is transferred to the computer 10. If it is determined that the sector has the mode 1 data arrangement structure, the data of that sector is given to the error detection and correction circuit 35. The error detection and correction circuit 35 detects the presence or absence of an error in the data described in the user data area using the data described in the EDC area (4), the P parity area, and the Q parity area. If there is no error, the data is sent to the computer 10 as it is. If there is an error, it is corrected, and the corrected program or data is output from the error detection and correction circuit 35 and transferred to the computer 10.

When data other than the data representing Mode 0, Mode 1 or Mode 2 is described in the header area of the sector input to the mode detection circuit 34, the mode detection circuit 34 outputs an error message. The error message is given from the CD-ROM drive 14 to the OS of the computer system. Users in such sectors
The data described in the data area is not transferred from the CD-ROM drive 14 to the computer 10.

As described above, the special sectors are
The special data is recorded in the form of or. In any of these cases, the mode detection circuit 34 determines that data other than mode 0, mode 1, or mode 2 has been recorded based on the special data at the recording location of the mode in the header area of the special sector. -A message will be output.

FIG. 9 is a flowchart showing a processing procedure of the computer according to the installation program (file 1) stored in the CD-ROM 20.

The CD-ROM 20 is a CD-ROM drive 14
The OS controls the CD-ROM drive 14 to access the PVD (sector in which the PVD is described) recorded at a position corresponding to a reproduction time of 00:02:16. The first thing to access PVD is CD-R
It is defined in the standard regarding OM. PVD content is C
Read by PU10. OS based on PVD contents
Thus, the total data amount of the data (including the program) recorded on the CD-ROM 20 is recognized.
The files and directories stored in the CD-ROM 20 are recognized based on the path table in D.

When a start command for the installation program (file 1) is input from the input device 11, the OS
According to the path table in D, the CD-ROM drive 14 is controlled to access the installation program. The installation program is transferred to the memory 13. CPU 10 is installed in memory 13
The following processing is started according to the program.

The installation program includes a CD-R
The recording position (00:03:00 frame (00: 03.00)) of the special sector of the OM 20 is described by the logical address, and the logical address is written to the drive (here, the CD-ROM drive 14) from which the installation program is read. A control instruction for accessing an address is described. C
Upon receiving this control command from the CPU 10, the D-ROM drive 14 calculates (converts) time information from the logical address and accesses a sector recorded at a position corresponding to the time information (step 41).

When the sector at the position of 00:03:00 frame is accessed by the CD-ROM drive 14,
If it is a special sector, the CD-ROM drive 14 outputs to the OS an error message indicating that the data recorded in that sector cannot be read. An error message is given from the OS to the installation program (step 42).

The installation program provided with the error message from the OS is installed in the CD-ROM drive 14.
The CD-ROM loaded in the is a regular CD-ROM
(That is, the CD-ROM 20 itself) (YES in step 42). The installation program continues the installation, reads the application program and data (file 2, file 3 and file 4) from the CD-ROM 20 and stores them on the HD of the computer system (step 43).

As described above, a CD-RO having a special sector
When the M20 is loaded into the CD-ROM drive 14 and the installation program is executed, the application programs and data recorded on the CD-ROM 20 are installed on the HD. Computer with application programs and data installed on HD
The system operates as a device that realizes predetermined functions (word processing function, spreadsheet function, etc.) based on the application program by executing the application program.

FIG. 10 shows a CD-R obtained by copying the contents of the CD-ROM 20 as it is (this CD-R is inserted into a CD-R17A).
) Is shown together with the file structure of the CD-ROM 20 (same as FIG. 6). CD-R
Has the same disk shape as a CD-ROM and is writable.

A copying apparatus for copying a program or data recorded on a CD-ROM as it is to a CD-R,
A reading device for reading ROM programs and data, and a writing device for writing the read programs and data directly to the recording layer of the CD-R by laser light.

When the contents of the CD-ROM 20 are directly copied to the CD-R 17 using a copying device, the data (including the program) recorded on the CD-ROM 20 by the reading device of the copying device is stored in the CD-ROM 20. The data is read in order from the inside, and the read data is sequentially recorded spirally from the inside to the outside of the CD-R 17 by the writing device of the duplication device.

On the CD-R, the lead-in, pre-gap, and PVD of the CD-ROM 20 are sequentially copied. However, the CD-ROM 20 has a special sector having special data next to the PVD. The reader outputs an error message when accessing the special sector. In response to this error message, the copying apparatus stops copying the contents of the CD-ROM 20 to the CD-R. A program or data recorded outside the position where the special sector of the CD-ROM 20 is recorded is stored in a CD-R.
Will not be duplicated. Therefore, the CD-R17A obtained by duplication does not have special data, installation programs, application programs and data, and no lead-out.

Lead-in, pre-gap and PV
Even if such a CD-R17A in which only D is duplicated is loaded into the CD-ROM drive 14 of the computer system, the CD-R17A does not have an installation program (including application programs and data). Application programs and data (file 2, file 3 and file 4) from CD-R17A to HD device of computer system, etc.
Will not be installed.

FIG. 11 shows an H which is a copy of the contents of the CD-ROM 20.
A part of the file structure of the HD of the D device 18 (the HD in this state is referred to as HD 18A) and a CD-R (this CD-R) obtained by further copying the contents of the HD of the HD device 18
Is assumed to be CD-R17B).
This is shown together with the file structure of OM20 (same as FIG. 6).

Copying the contents of the CD-ROM 20 to the HD
This is performed on a file basis according to the file copy function of the OS.

As described above, even if an instruction to copy the entire contents of the CD-ROM 20 to the HD of the HD device 18 is given to the computer system, the reading device (CD-R
The OM drive 14) outputs an error message when accessing the special sector. The special data described in the special sector is not read by the CD-ROM drive 14 and transferred to the computer 10, and therefore, the special data is not copied to the HD. Only the file 1, the file 2, the file 3 and the file 4 are simply copied to the HD 18A in file units. Since the lead-in, pre-gap, PVD and lead-out are not recognized as files by the OS, they are not copied to the HD.

A program (generally, a writing program (software) for copying programs and data from the HD to the CD-R using the HD 18A obtained by copying the files 1 to 4 of the CD-ROM 20 in file units. Is called CD-R, the CD-R17B
Is obtained. CD-R17B has no CD-R except special data.
The contents of the ROM 20 will be duplicated. This CD-R
In 17B, files 1-4 and PVD are created by writing software, and the lead-in, pre-gap and lead-out are created by the CD-R drive 14.

When such a CD-R17B is loaded into the CD-ROM drive 14 and the installation program recorded on the CD-R17B is started, the position where the special sector should exist, that is, 00 minutes Since there is no special sector at the position corresponding to the playback time of 03 seconds 00 frames,
Even if the recording position corresponding to the reproduction time of 00 minute 03 second 00 frame is accessed by the D-ROM drive 14, the CD-ROM drive 14
No error message is output from the ROM drive 14, and therefore the installation program does not receive the error message (FIG. 9, N in step 42).
O). The installation program that has not received the error message stops the installation process (step 44). Application copied to CD-R17B
The program and data (file 2, file 3, and file 4) are not installed in the HD device or the like of the computer system.

The installation program (file 1) copied to the HD 18A shown in FIG.
If you try to install the application program and data (file 2, file 3 and file 4) copied to another HD device,
Installation is aborted. This is because it is assumed that the data is read from the CD-ROM drive 14 or the like.
The installation program stored in OM20 is CD
-It operates only when it is read from the ROM drive 14 or the like and executed, and if it is read from the HD or the like and executed, it requests the OS to stop the processing. Dynamic link
Because it contains a library. That is, CD-
When the installation program (file 1) stored in the ROM 20 is copied to the HD 18A, and an instruction to read out and start the installation program from the HD 18A is externally input to the computer system, the CD-R
Install from HD18A instead of OM drive 14, etc.
The reading of the program is detected by the dynamic link library included in the installation program. The dynamic link library notifies the OS of a request to stop the processing of the installation program. The OS stops the processing of the installation program. Therefore, even the first step (step 41) of the installation program is not executed, and the application program and data are installed in the HD device or the like of the computer system based on the installation program copied to the HD 18A. Never.

The CD-ROM on which the special sector is recorded is
Decryption program instead of installation program
Encrypted data may be recorded in place of the application program and data. This decryption program controls a computer system to decrypt encrypted data recorded on a CD-ROM and generate plaintext data. The decryption program also describes position information where the special sector is recorded. The decryption program further executes a CD-ROM drive 14 based on the position information of the special sector described in the decryption program.
Is controlled to access a special sector, and the CD-RO
When an error message is output from M14 drive, C
The computer system is controlled so that the encrypted data recorded in the D-ROM is decrypted, and the decryption of the encrypted data is stopped if no error message is output. When copying the contents of a CD-ROM directly to a CD-R, or copying the contents of a CD-ROM
In any case of copying to the DR, there is no special sector in the CD-R obtained by the copying.
No error message is output from the D-ROM drive 14, and even if the decryption program and the encrypted data are
Even if the data is copied to R, decryption of the encrypted data is stopped. Encrypted data is protected.

[Brief description of the drawings]

FIG. 1 is a plan view showing a data recording surface of a CD-ROM.

FIG. 2 shows a data arrangement structure of a CD-ROM.

FIG. 3 shows a data arrangement structure of mode 0 and mode 2 sectors.

FIG. 4 shows a data arrangement structure of a mode 1 sector.

FIG. 5 shows a special sector.

FIG. 6 shows a file structure of a CD-ROM.

FIG. 7 is a block diagram showing the overall structure of a computer system.

FIG. 8 is a block diagram showing an outline of a reproduction circuit of the CD-ROM drive.

FIG. 9 is a flowchart showing a processing procedure of an installation program.

FIG. 10 shows a file structure of a CD-R obtained by copying the contents of a CD-ROM, together with a file structure of the CD-ROM.

FIG. 11 shows a part of a file structure of a hard disk in which the contents of a CD-ROM are duplicated and a file structure of a CD-R in which the contents of the hard disk are duplicated.
This is shown together with the OM file structure.

[Explanation of symbols]

 10 CPU 11 Input device 12 Display device 13 Memory 14 CD-ROM drive 16 CD-R drive 17 CD-R 18 HD device 20 CD-ROM

Claims (4)

[Claims] A plurality of sectors defined as a unit area including position information on a recording medium are provided, and an installation program for installing an application program recorded over one or more sectors on a computer is provided. Alternatively, one or more sectors other than the sector in which the application program and the installation program are recorded over a plurality of sectors are special sectors having special data that causes an error in a reading device of the recording medium. The program includes a description of the position information of the special sector, further attempts to access the special sector in accordance with the description of the position information of the special sector, and loads the application program if no error occurs from the reading device. A recording medium for causing a computer to execute a process of stopping the stall and continuing the installation of the application program when the reading device generates an error. 2. The special sector, wherein when the recording medium is an optical recording medium, pits representing data obtained by encoding a signal of a predetermined frequency are formed in a portion excluding a synchronization signal recording area; This indicates the case where no pits are formed in the portion excluding the synchronization signal recording area, the case where pits having irregular dimensions are formed in the portion excluding the synchronization signal recording area, and the mode predetermined in the header area. Data other than data recorded,
The recording medium according to claim 1, wherein the recording medium is any one of the following. 3. The recording medium according to claim 1, wherein the recording medium is a disk-shaped recording medium, and the special sector is recorded inside a recording position of the application program. 4. A program for pre-preparation processing in which a plurality of sectors defined as a unit area including position information on a recording medium are provided, and a program or data recorded over one or a plurality of sectors can be used. Is recorded over one or more sectors, and one or more sectors other than the sector on which the program or the data and the program for the preparatory process are recorded have special data having a special data which causes the reading device of the recording medium to generate an error. The program for the preparatory processing includes a description of the position information of the special sector, and further attempts to access the special sector in accordance with the description of the position information of the special sector. If not, stop the preparatory processing for making the above program or data usable, and read the above A recording medium for controlling a computer so as to continue a preparation process for enabling the program or data when an error occurs in the storage device.