JP3480080B2 - Disc-shaped recording medium, disc-shaped recording medium recording method, and disc-shaped recording medium reproducing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc-shaped recording medium applicable to, for example, a file lock system for secretly retaining data recorded on a disc-shaped recording medium such as a magneto-optical disc, a compact disc and a magnetic disc. The present invention relates to a recording method for a disc-shaped recording medium and a reproducing method for the disc-shaped recording medium.

[0002]

2. Description of the Related Art Today, various file lock methods have been put into practical use in order to prevent illegal use of software information recorded on distribution media such as optical disks.

First, there is known a one-machine-one-software type file locking method which permits use only to a specific machine that has read (installed) software information recorded in the distribution medium. In this file locking method, immediately after the installation, data indicating that the installation has been completed is written in the distribution medium. As a result, after that, another machine cannot read the software information recorded on the distribution medium, and it is possible to prevent illegal use of the software information recorded on the distribution medium. This one-machine, one-software file locking method has an advantage that, if the software information recorded in the distribution medium is installed on a specific machine, the software information can be used by a plurality of users.

Next, only the machine that has received the token server, which is the data indicating the permission to use the software information, by installing the software information in each machine on the network and setting the respective machines in the standby state,
A file locking method based on a floating license method is known in which the software information can be actually used. In this floating license system, software information cannot be used unless one token server is passed over the network and the token server is received. Therefore, since the token server is not handed over to a person who attempts to illegally use the software information, illegal use of the software information can be prevented.

Next, the number of users who use the network is predetermined, each user is given a unique token for permitting the use of software information, the software information is installed on the server, and the installed software information is stored. A file lock method based on a client / server model method is known in which the token is provided only to the user who has received the token. This client / server model scheme cannot use the software information unless the server receives a unique token given to each user. Therefore, a person who attempts to illegally use the software information cannot receive the software information from the server unless he / she knows the token unique to the user, and it is possible to prevent the illegal use of the software information.

[0006]

However, the file locking method of the one-machine-one-software method can be used only in the specific machine in which the software information is installed, and therefore, is created using the software information. However, there was a problem that the individual data was not portable. Furthermore, by recording the software information on another medium, it is possible to easily create a so-called dead copy of the distribution medium. For this reason, it has not been possible to completely prevent illegal use of software information.

On the other hand, in the file locking method based on the floating license method, software information is installed in advance in each machine on the network.
By disconnecting the machine from the network,
The software information can be used without receiving the token. For this reason, it is possible to separate the machine from the network and simultaneously use a plurality of pieces of software information at the same time, thus making it impossible to completely prevent the illegal use of the software information.

Further, in the file lock method based on the client / server model, the server in which the software information is installed can use the software information by receiving the token unique to the user from the user. Teaches the unique token to other users, users other than the registered users can also use the software information by using the token. Therefore, it has not been possible to completely prevent illegal use of software information.

The present invention has been made in view of the above problems, and is a disk-shaped recording medium capable of completely preventing illegal use of software information, a recording method for the disk-shaped recording medium, and a disk-shaped recording. The purpose is to provide a method for reproducing a medium.

[0010]

A disk-shaped recording medium according to the present invention comprises a reproduction-only area provided with an identification information recording area in which identification information unique to a medium and file is recorded, In addition, the block information calculated by a predetermined encoding algorithm based on the file-specific identification information and each block number for recording the data is the data for forming at least one file, which is recorded together with the data of each block. It has a recordable and reproducible area which is a data recording area recorded for each block.

The disc-shaped recording medium recording method according to the present invention is such that a predetermined number is determined based on the medium-specific identification information unique to the file formed by the data of each block and the block number of the block. Calculate the block information for each block by the encoding algorithm,
The identification information is recorded in a predetermined area of the disk-shaped recording medium, and the data for each block of the file is recorded in the data recording area of the disk-shaped recording medium together with the block information.

In this disc-shaped recording medium recording method, the disc-shaped recording medium is a ROM which is a read-only area.
It has an area and a RAM area which is a recordable / reproducible area, and the identification information is recorded in the ROM area.

Further, in the disc-shaped recording medium reproducing method according to the present invention, the medium-specific and file-specific identification information is recorded in the identification information recording area, and the identification information and the data are recorded in the data recording area. Block information calculated by a predetermined encoding algorithm based on each block number is used together with the data of each block to record a disc-shaped recording medium, and the identification information is recorded from the identification information recording area of the disc-shaped recording medium. read out. Then, the block information, the block number, and the data are read from the data recording area of the disk-shaped recording medium, and the identification information is calculated based on the read block information and the block number by a predetermined decoding algorithm corresponding to a predetermined encoding algorithm. Then, the identification information read from the identification information recording area is compared with the identification information calculated by the decoding algorithm, and the data read from the data recording area is output only when the two match.

[0014]

The disk-shaped recording medium according to the present invention is a read-only area provided with an identification information recording area and a data recording area in which data forming at least one file is recorded in predetermined blocks. There is a feasible area.

The recording method for the disc-shaped recording medium according to the present invention is a recording method for recording the following information in the identification information recording area and the data recording area of the disc-shaped recording medium.

That is, in the identification information recording area, for example, a secret code unique to the medium and unique to the file,
Record identification information such as microcode. Further, in the data recording area, block information calculated by a predetermined encoding algorithm based on each block number for recording the identification information and data is recorded together with the data of each block.

On the other hand, the disc-shaped recording medium reproducing method according to the present invention is a method of reproducing data from the disc-shaped recording medium in which each information is recorded as described above. First, the disc-shaped recording medium is identified. The identification information is read from the information recording area, and the block information, the block number and the data are read from the data recording area.

Next, based on the read block information and block number, the identification information is calculated by a predetermined decoding algorithm corresponding to a predetermined encoding algorithm.

Then, the identification information read from the identification information recording area is compared with the identification information calculated by the decoding algorithm, and the data read from the data recording area is read only when the two match. Output.

As a result, even if the data of each file recorded on the disk-shaped recording medium is copied to a different medium, the identification information recorded in the identification information recording area cannot be copied. It is not possible to release the lock (file lock) applied to each file at the time of reproduction, it is possible to prevent illegal reproduction, and it is possible to completely prevent illegal copying.

Further, in a disk-shaped recording medium having a ROM area which is a reproduction-only area and a RAM area which is a recordable / reproducible area, data of a file recorded in the ROM area is copied to the RAM area. Also the RA
File block number and RA recorded in the M area
Since the block number of the file recorded in the M area is different, it is still impossible to release the file lock,
It is possible to prevent illegal reproduction and completely prevent illegal copying.

In addition, today, a plurality of files (software) are recorded on one medium, and in exchange for the price, the user is provided with a personal identification number or the like for unlocking the file lock of the software, and the personal identification number or the like is given. A new method of selling software that allows only software to unlock a file is known, but even in such a new method, the identification information given to the user as a personal identification number differs for each medium and Since the information is valid only for that medium, the file lock cannot be released even if the same medium is purchased and the identification information obtained illegally by another person is used. Therefore, even in the above-mentioned new system, it is possible to completely prevent illegal reproduction.

Further, even if the identification information and the file recorded on the disk-shaped recording medium are once stored in the semiconductor memory and read out and recorded on another medium, the block number recorded on the other medium is In addition, it cannot be unlocked because the decoding algorithm is unknown because it is different. Therefore, in cooperation with such an operating system, it is possible to completely prevent illegal reproduction.

In this way, since illegal copying by general users can be completely prevented, illegal copying which is currently flooding all over the world can be completely prevented.
It is possible to fulfill social responsibility as a media and drive manufacturer.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a disc-shaped recording medium, a disc-shaped recording medium recording method and a disc-shaped recording medium reproducing method according to the present invention will be described below in detail with reference to the drawings.

The recording method of the disc-shaped recording medium according to the present invention can be applied to the recording unit 1 shown by the one-dot chain line in the drawing of the information processing apparatus as shown in FIG. 1, and the disc-shaped recording medium according to the present invention. The reproducing method of can be applied to the reproducing unit 2 shown by a dotted line in the figure, and the disc-shaped recording medium according to the present invention can be applied to the medium 3 which is an optical disc.

The recording system 1 of the information processing apparatus is connected to an external device such as a computer, and a first external interface 4 to which vendor key generation designation data for designating generation of a vendor key described below is supplied. When,
A vendor key generation circuit 5 for generating a file-specific vendor key attached to each file recorded on the medium 3 according to the vendor key generation designation data, and the vendor key are provided on the medium 3. And a vendor unique area access controller 6 for recording and reproducing in the vendor unique area 3a.

The recording system 1 is connected to an external device such as the computer device, and the second external interface 7 to which the data to be recorded on the medium 3 is supplied.
And the vendor key from the vendor key generation circuit 5 above,
And an encoder 8 for calculating a file to be recorded on the medium 3 and a file block key specific to a write block number of the file based on an encoding algorithm supplied from an external computer device or the like via the interface 7, It has a write control circuit 9 for recording the data supplied from the computer according to the control program and the control command supplied from the external computer in the corresponding write block together with the file block key.

The reproduction system 2 of the information processing device is supplied from the computer device and a vendor key detection circuit 10 for detecting the vendor key read from the vendor unique region 3a by the vendor unique region access controller 6 during reproduction. The vendor key is calculated from the file block key read from the medium 3 and the block number in which the file block key was recorded, based on the decoding algorithm that is generated, and from the calculated vendor key and the vendor unique area 3a. And an encoder 8 for comparing the read vendor key.

In the reproducing system 2, when reproducing, first,
The file block key and the block number are read from the medium 3, and when the encoder 8 obtains a comparative output indicating that the vendor keys match, the data of the block number is read, and the vendor key is read. A read control circuit 11 that outputs a read error output or 0 data instead of the above data when a comparison output indicating that they do not match is obtained, and the read control circuit 11 sends the data from the read control circuit 11 to the control program and control from the computer device. Third external interface 1 for supplying to the computer device in response to a command
3 and 3.

The medium 3 is of a hybrid type composed of a ROM area provided in a predetermined area on the inner circumference side of the medium 3 and a RAM area provided in a predetermined area on the outer circumference side of the medium 3. Has become. The vendor unique area is provided in the ROM area, is not open to general users, and can be accessed only by the vendor.

Next, the operation of the information processing apparatus according to this embodiment having such a configuration will be described.

First, the vendor who records data on the medium 3 records a unique vendor key attached to each file prior to recording the data.

This vendor key is, for example, a vendor arbitrary microcode, personal identification number, or the like, and is input by a computer device externally connected to the first external interface 4. The vendor key input from the computer device is supplied to the vendor key generation circuit 5 via the first external interface 4. The vendor key generation circuit 5 converts the vendor key supplied by the computer device into a format suitable for recording, and supplies this to the vendor unique area access controller 6 and the encoder 8. The vendor unique area access controller 6 records the vendor key in the vendor unique area 3 a of the medium 3.

Specifically, the vendor unique area 3
In a, as shown in FIG. 2, the first file (File-
a) vendor key (Key1-a), second file (File-b) vendor key (Key1-b)
A unique vendor key is recorded for each file, such as.

Next, the vendor operates the computer device to input a predetermined encoding algorithm and a control program necessary for writing data.
As the above-mentioned encoding algorithm, a vendor-desired encoding algorithm can be applied. As a result, the encoding algorithm is loaded into the encoder 8 via the second external interface 7, and the control program is loaded into the write control circuit 9 via the second external interface 7.

Next, the vendor operates the computer device to input the data of each file. The data of each file is supplied to the encoder 8. The encoder 8 calculates a file block key unique to the file and the block number of the file based on the loaded encoding algorithm, and supplies this to the write control circuit 9.

Next, the vendor operates the computer device to input the data of each file and the control command for designating the recording of the data of each file. The data of each file and the control command are supplied to the write control circuit 9 via the encoder 8. The write control circuit 9 controls the R of the medium 3 based on the loaded control program and control command.
The data of each file is recorded in the AM area, and the file block key calculated by the encoder 8 is added and recorded for each block of each file.

Specifically, as shown in FIG. 2, each block B of the first file File-a is stored in the RAM area.
The file block keys Key2-a1 to Key2-am are attached to the respective ida1 to Bidam, and the data Dt-a1 to Dt-am of the blocks are recorded. Similarly, the file block keys Key2-b1 to Key2-bm are attached to the blocks Bidb1 to Bidbm of the second file File-b, respectively.
Data Dt-b1 to Dt-bm of each block are recorded.

The file block key may be calculated in advance based on the vendor key, and the vendor key and the file block key may be recorded together with the data by stamping.

Next, when reproducing the data thus recorded, first, the third external interface circuit 1
A decoding algorithm and a control program at the time of reproduction are input from the computer device via the computer 3.
The decoding algorithm is loaded into the decoder 12, and the control program is loaded into the read control circuit 11.

Next, the vendor unique area access controller 6 reproduces the vendor key recorded in the vendor unique area 3a of the medium 3,
This is supplied to the vendor key detection circuit 10 and
The read control circuit 11 is a file block key attached to each file data and each block data recorded in the medium 3 according to the control program and the control command supplied from the computer device at appropriate time. Is read out and is supplied to the decoder 12.

Specifically, the vendor unique area access controller 6 reads out the vendor key Key1-a or Key1-b peculiar to the file designated for reproduction from the vendor unique area 3a shown in FIG. The vendor key Key1-a or Key1-b is supplied to the decoder 12 via the vendor key detection circuit 10. Further, when the reproduction of the first file File-a is designated, the read control circuit 11 makes the block number B of the first file File-a.
side-a1 to side-am and file block keys Key2-a1 to Key assigned to each block.
y2-am is read and these are supplied to the decoder 12.

The decoder 12 determines the vendor key assigned to each file from the block number of the data read by the read control circuit 11 and the file block key based on the loaded decoding algorithm. calculate. Then, the calculated vendor key is compared with the vendor key from the vendor key detection circuit 10, and only when they match each other, the data read by the read control circuit 11 is used by the decoder and the third device. It is output to the computer device side via the interface circuit 13.

If the above two do not match,
The decoder 12 outputs, for example, all 0 data or data indicating a data read error.

As described above, the information processing apparatus according to the present embodiment records the vendor key unique to the medium in the vendor unique area 3a which is not open to general users, and the vendor key and the write block number are used to determine a predetermined value. A file block key unique to each block of each file is calculated based on the encoding algorithm of 1., and each file block key is recorded together with the data of each block. Also, at the time of reproduction, a vendor key is reproduced from the vendor unique area 3a based on the block number of the file to be reproduced and the file block key attached to the block based on a decoding algorithm corresponding to the encoding algorithm. Compare with the played vendor key. Then, the data of each file is output only when the vendor key reproduced based on the decoding algorithm matches the vendor key reproduced from the vendor unique area 3a.

Therefore, even if the data of each file recorded in the medium 3 is copied to a different medium, the vendor key recorded in the vendor unique area 3a cannot be copied. The lock applied to the file (file lock) cannot be released, illegal reproduction can be prevented, and illegal copying can be completely prevented.

Further, in the medium having the ROM area and the RAM area like the medium 3, the RO
The data of the file recorded in the M area is stored in the RAM
Even if the data is copied to the area, since the block number of the file recorded in the RAM area is different, the file lock cannot be released, and illegal reproduction can be prevented to completely prevent illegal copying. .

In addition, today, a plurality of files (software) are recorded on one medium, and in exchange for the price, the user is given a personal identification number or the like for unlocking the file lock of the software, and the personal identification number or the like is given. A new method of selling software that allows only software to unlock a file is known.However, even in such a new method, the vendor key given to the user as the personal identification number is different for each of the above media, and the personal identification number is different. Since the number is valid only for that medium, it is not possible to unlock the file even by using the PIN number that was illegally known from another person by purchasing the same medium. Therefore, even in the above-mentioned new system, it is possible to completely prevent illegal reproduction.

By providing a user unique area other than the vendor unique area 3a, and recording a user key corresponding to the vendor key for file-locking a file created by the user in this user unique area, A file created by the user can be locked privately, and personal confidentiality can be maintained.

Even if the vendor key and file recorded on the medium 3 are once stored in the semiconductor memory and read out and recorded on another medium, the block numbers recorded on the other medium are different. , Unable to release the file lock. Therefore, in cooperation with such an operating system, it is possible to completely prevent illegal reproduction.

In addition, since illegal copying by general users can be completely prevented in this manner, illegal copying, which is currently flooding all over the world, can be completely prevented.
It is possible to fulfill social responsibility as a media and drive manufacturer.

In the encoder 8, the write control circuit 9, the decoder 12, and the read control circuit 11, the encoding process, the decoding process, the decoding process, and the like according to the encoding algorithm, the decoding algorithm, the control command, etc. supplied from the externally connected computer device. Since the writing and reading processes are performed, it is possible to function as a secondary storage device having good compatibility with various operating systems while maintaining versatility.

In the above description of the embodiment, the vendor key is recorded in the vendor unique area 3a. However, this is for example a neodymium yag laser (N
The far-ultraviolet laser beam of 190 nm to 370 nm (d: YAG) may be used to record in a location other than the data recording area, and at the time of reproduction, this may be reproduced to perform the above-described decoding processing. As a result, a completely unique vendor key can be attached to each medium, and a stronger file lock can be achieved.

Although the medium 3 has the ROM area and the RAM area, it is possible to use an optical disk, a magnetic disk, a magneto-optical disk or the like having only the ROM area or the RAM area. Of course.

[0056]

The disc-shaped recording medium, the disc-shaped recording medium recording method, and the disc-shaped recording medium reproducing method according to the present invention allow data of each file recorded on the disc-shaped recording medium to be recorded on different media. Even if it is copied, the identification information recorded in the identification information recording area cannot be copied. Therefore, the lock (file lock) applied to each file at the time of reproduction cannot be released, and unauthorized reproduction is prevented. It is possible to completely prevent illegal copying.

Further, in a disk-shaped recording medium having a ROM area which is a reproduction-only area and a RAM area which is a recordable and reproducible area, data of a file recorded in the ROM area is copied to the RAM area. Also the RA
File block number and RA recorded in the M area
Since the block number of the file recorded in the M area is different, it is still impossible to release the file lock,
It is possible to prevent illegal reproduction and completely prevent illegal copying.

In addition, today, a plurality of files (software) are recorded on one medium, and in exchange for the price, the user is provided with a personal identification number or the like for unlocking the file lock of the software, and the personal identification number or the like is given. A new method of selling software that allows only software to unlock a file is known, but even in such a new method, the identification information given to the user as a personal identification number differs for each medium and Since the information is valid only for that medium, the file lock cannot be released even if the same medium is purchased and the identification information obtained illegally by another person is used. Therefore, even in the above-mentioned new system, it is possible to completely prevent illegal reproduction.

Further, even if the identification information and the file recorded on the disk-shaped recording medium are once stored in the semiconductor memory and read out and recorded on another medium, the block number recorded on the other medium is In addition, it cannot be unlocked because the decoding algorithm is unknown because it is different. Therefore, in cooperation with such an operating system, it is possible to completely prevent illegal reproduction.

In addition, since illegal copying by general users can be completely prevented in this manner, illegal copying, which is currently flooding all over the world, can be completely prevented.
It is possible to fulfill social responsibility as a media and drive manufacturer.

[Brief description of drawings]

FIG. 1 is a block diagram of an information processing apparatus to which a disc-shaped recording medium, a disc-shaped recording medium recording method, and a disc-shaped recording medium reproducing method according to the present invention are applied.

FIG. 2 is a schematic diagram for explaining a vendor key, a file block key, etc. recorded on a medium applied to the information processing apparatus.

[Explanation of symbols]

1 recording system 2 reproduction system 3 media 3a Vendor unique area 4 First external interface 5 Bender key generation circuit 6 Vendor Unique Area Access Controller 7 Second external interface 8 encoder 9 Write control circuit 10 Bender key detection circuit 11 Read control circuit 12 decoder 13 Third external interface

Claims (4)

(57) [Claims] 1. A reproduction-only area provided with an identification information recording area in which identification information unique to a medium and a file is recorded, and each block for recording identification information and data unique to the medium and a file. The block information calculated by a predetermined encoding algorithm based on the number is
A disk-shaped recording medium having a recordable / reproducible area, which is a data recording area in which data forming at least one file is recorded together with the data in each block. 2. Block information is calculated for each block by a predetermined encoding algorithm based on identification information unique to the medium and file uniquely formed by data of each block, and the block number of the block, While recording the identification information in a predetermined area of the disk-shaped recording medium, the data for each block of the file is recorded in the data recording area of the disk-shaped recording medium together with the block information. Recording method. 3. The disc-shaped recording medium has a ROM area, which is a read-only area, and a RAM area, which is a recordable and reproducible area, and the identification information is recorded in the ROM area. The recording method for a disk-shaped recording medium according to claim 2. 4. Identification information unique to the medium and to the file is recorded in the identification information recording area, and is calculated by a predetermined encoding algorithm based on the identification information and each block number for recording the data in the data recording area. Block information is recorded together with the data of each block using a disk-shaped recording medium, the identification information is read from the identification information recording area of the disk-shaped recording medium, and the block is recorded from the data recording area of the disk-shaped recording medium. The information, the block number, and the data are read, based on the read block information and the block number, the identification information is calculated by a predetermined decoding algorithm corresponding to the predetermined encoding algorithm, and the identification information read from the identification information recording area is stored. Calculated by the above decoding algorithm A method for reproducing a disk-shaped recording medium, which compares the identification information and outputs the data read from the data recording area only when the two match.