JPH06161901A - Information processor - Google Patents

Abstract

PURPOSE:To provide an information processor which can reduce the danger of leakage of the information to the outsiders and also can guard the copies at a low cost. CONSTITUTION:An information processor includes a connection/control means 150 which includes a 1st area 101 where the read-only fixed information is recorded and a 2nd rewritable area 102, a display control means 140 which performs the connection and control of a display device 110, a processing means 120 which processes the data based on the fixed information of the area 101, and a restoring means 130 which restores the processing result based on the fixed information of the area 101. When the data are written into a recording medium 100, the processing result is written in the area 102. Then the processing result read out of the area 102 is restored by the means 130 when the data are read out of the means 100 and displayed. The restored data are shown on the device 110.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing device,
In particular, it relates to an information processing device for preventing illegal copying of a medium.

[0002]

2. Description of the Related Art With the progress of speeding up of lines, it is possible to provide an information delivery service in which the speeding up is differentiated. For example, it becomes possible to store a huge amount of data such as a book in a center device and send the required data to each home via a high-speed line as needed. in this case,
A portable medium for storing a large amount of data sent from the center device is connected to the terminal device installed in each home. In that case, how to prevent illegal copying of a portable medium is an important issue. Conventionally, the following method has been performed as a method for preventing unauthorized copying of a portable medium.

This method of giving a personal identification number is to give a personal identification number such as a password to a file, and only a person who knows the personal identification number can access the file. That is, even if the portable medium is copied, it cannot be used unless the personal identification number is known.

Physical Guard This method uses a special writing device to perform physically special writing such as forcibly causing a hard error at a specific portion of a portable medium. With a soft copy tool such as a commercially available copy tool, the physical state such as a hard error cannot be copied.Therefore, by creating a program with this hard error occurrence as a prerequisite for file access, it is possible to File access can be prevented.

[0005]

However, in the information delivery service, the following problems occur when these conventional copy guard methods are used.

Assigning a personal identification number The personal identification number is assigned to the person who receives the information delivered from the center (that is, the personal identification number).
Only the person who paid the fee) will be notified, but if this person maliciously teaches the secret code to another person, the guard will be broken. If it is disadvantageous for the person to teach the secret code to others, such as a cash card, the secret code is worth it, but in the case of the information delivery service, it does not directly disadvantage the person, so it is easy to tell the secret code to others. There is a great risk of giving a number.

Physical Guard This method requires a special writing device. In the case of selling the medium itself in which the content of the file is written in advance like the conventional software sale, it suffices to have this special writing device in one place. However, in the information delivery service system, since each home terminal device writes data on the medium, a special writing device is required for all the terminal devices.
Therefore, there is a problem that the terminal device becomes expensive.

The present invention has been made in view of the above points,
An object of the present invention is to provide an information processing device which has a low risk of leaking information to another person and can perform copy guard at low cost.

[0009]

FIG. 1 is a block diagram showing the principle of the present invention.

According to the first aspect of the present invention, in an information processing apparatus for writing data to a recording medium, reading data from the recording medium, and displaying the fixed information, fixed information is recorded in advance by using a read-only recording method. Connection / control means 150 for connecting / controlling a recording medium composed of an area 101 and a second area 102 using a rewritable recording method.
A display control means 140 for connecting and controlling the display device 110 for displaying data, a processing means 120 for processing the data using the fixed information of the first area 101, and a processing means 1.
The recording medium 1 includes a reducing unit that restores the processing result processed by 20 using the fixed information of the first area 101.
When writing the data to 00, the processing result by the processing unit 120 is written to the second area 102, and the recording medium 100
During the data read / display operation from the second area 1,
The processing result read from 02 is returned to the original by the reducing means 130, and the restored data is displayed on the display device 110.

[0011]

The information processing apparatus of the present invention uses a medium having a rewritable area and an area using a read-only recording method, and the fixed information previously recorded for each medium in this read-only area. Is a device for encrypting and decrypting data to be written in the rewritable area by using, and thereby easily preventing illegal copying of the medium.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 2 shows the overall configuration of an information processing apparatus according to an embodiment of the present invention.

In the figure, in the information processing apparatus, a large-capacity file 2 for data storage is connected under the control of a center apparatus 1, and further, a terminal apparatus 4 is connected to the center apparatus 1 via a high speed line 3. A recording medium 5 for storing data and a display 6 for displaying data are connected under the terminal device 4.

The center device 1 comprises an encryption ID section 11, a key generation processing section 12, a key section 13, a data storage buffer 14, an encryption processing section 15, and an encrypted data storage buffer 16.

The terminal device 4 includes a rewriting area display register 41, a write data buffer 42, a read data buffer 43, a decryption processing unit 44, a data display buffer 45, an ID encryption processing unit 46, an encryption ID unit 47, It is composed of a key generation processing unit 48 and a key unit 49.

The encryption ID section 11 of the center device 1 holds the encrypted ID number sent from the terminal device 4.
The key generation processing unit 12 generates a key for data encryption based on the encrypted ID number from the encryption ID unit 11.

First, the processing of each part of the center device 1 will be described.

The key unit 13 holds the key for data encryption generated by the key generation processing unit 12. The data storage buffer 14 holds the data extracted from the data storage large capacity file 2. The encryption processing unit 15 encrypts the data stored in the data storage buffer 14 based on the key unit 13. The encrypted data storage buffer 16 holds the data encrypted by the encryption processing unit 15.

Next, the processing of each unit of the terminal device 4 will be described. The rewriting area display register 41 is used for the recording medium 5
Holds the first track number of the rewritable area of.
The write data buffer 42 holds the encrypted data sent from the center apparatus 1 in order to write it on the recording medium 5. The read data buffer 43 includes the recording medium 5
Holds the data read from. Decryption processing unit 44
Decodes the data held in the read data buffer 43. The data display buffer 45 holds the data decrypted by the decryption processing unit 44. I
The D encryption processing unit 46 uses the read data buffer 43.
The ID number of the medium read out is encrypted. The encryption ID part 47 is the ID encrypted by the ID encryption processing part 46.
Hold the number. The key generation processing unit 48 uses the encrypted I
A key for data decryption is generated based on the D number.
The key unit 49 holds the key for data decryption generated by the key generation processing 48.

FIG. 3 is a logical block diagram of a recording medium according to an embodiment of the present invention. FIG. 4 shows the physical structure of the recording medium. The recording medium 5 has the number of tracks (N) as shown in FIG.
Read-only area 51 and a rewritable area 52 having the number of tracks (M−N).

The read-only area 51 is an area in which data is recorded by forming physical pits (concavities and convexities) on the substrate at the time of manufacturing the medium, and the data cannot be rewritten thereafter.

As shown in FIG. 3, the rewritable region 52 is a region in which a magnetic film is placed on a substrate and used as a recording layer to allow rewriting of data at any time.

The recording medium 5 has a total of M tracks, of which N tracks with track numbers 0 to N-1 are in the read-only area 51 and M with track numbers N to M-1. -N tracks are in the rewritable area 52. Rewritable area 5 in track number 0
The value of the first track number N of 2 and the ID number of the medium are recorded in the track number 1 when the medium is manufactured. Medium I
The D number is different for each medium.

The operation when the required data is delivered from the center device 1 to the terminal device 4 based on the request from the terminal device 4 will be described below.

FIG. 4 is a flow chart showing the operation of delivering data from the terminal device to the center device according to the embodiment of the present invention.

Step 1: First, the terminal device 4 reads the contents of track number 0 of the recording medium 5. The value of the number of tracks N recorded in the track number 0 is read out through the read data buffer 43 and the rewriting area display register 4
Hold at 1.

Step 2: Next, the terminal device 4 reads the contents of the track number 1 of the recording medium 5, reads the medium ID number recorded therein, and reads the data buffer 43.
Hold on.

Step 3: The medium ID number held in the read data buffer 43 is encrypted by the ID encryption processing unit 46, and the result is stored in the encryption ID unit 47. After that, the terminal device 44 connects to the center device 1 and sends the contents of the cipher ID section 47 to the center device 1 via the high-speed line 3. Since the ID number is encrypted and transmitted on the line 3, it cannot be leaked to the outside.

Step 4: The terminal device 4 also notifies the center device 1 of the type of data to be delivered simultaneously via the high-speed line 3.

Step 5: The center device 1 is the terminal device 4
The contents of the cipher ID of the cipher ID section 47 sent from the device are stored in the cipher ID 11.

Step 6: Next, in the center device 1, the key generation processing unit 12 converts the contents of the encryption ID unit 11 into a key for data encryption, and stores the result in the key unit 13.

Step 7: Next, the center device 1 reads out the data to be sent to the terminal device 4 from the large-capacity data storage file 2 based on the request content from the terminal device 4, and stores it in the data storage buffer 14. To do.

Step 8: Next, the center apparatus 1 encrypts this data by the encryption processing unit 15 and stores it in the encrypted data storage buffer 16. This data encryption is performed using the contents of the key unit 13.

Step 9: The encrypted data thus generated is sent to the terminal device 4 via the high speed line 3. In this way, the data is encrypted on the line before being sent, so it does not leak outside.

Step 10: The terminal device 4 writes the encrypted data sent from the center device 1 into the write buffer 42.
Then, the data is written in the recording medium 5. This writing is performed in the rewritable area 52 after the track number N based on the value of N held in the rewritable area display register 41.

Next, the operation of the terminal device 4 when displaying the data stored in the recording medium 5 on the display 6 will be described. FIG. 6 is a flowchart showing the operation when displaying the data stored in the recording medium of the embodiment of the present invention.

Step 20: First, the terminal device 4 reads the medium ID number recorded in the track number 1 of the read-only area 51 of the recording medium 5.

Step 21: The terminal device 4 encrypts the read medium ID number by the ID encryption processing unit 46, and stores the result in the encryption ID unit 47.

Step 22: Next, the content of the cipher ID section 47 is converted into a key by the key generation processing section 48, and the result is stored in the key section 49. The key generation processing unit 48 of the terminal device 4 corresponds to the key generation processing 12 of the center device 1, and the content of the key 49 is determined by the key unit 13 of the center device 1 when the encrypted data is sent from the center device 1. It is capable of decrypting encrypted data.

Step 23: Next, the terminal device 4 reads the encrypted data stored in the rewritable area 52 of the recording medium 5 and stores it in the read data buffer 43.

Step 24: The decryption processing unit 44 of the terminal device 4 decrypts the encrypted data and stores the result in the data display buffer 45. This decryption is performed by the key unit 49
Is performed using the contents of. The decryption processing unit 44 performs the reverse of the encryption processing unit 15 of the center device 1, and the content of the data display buffer 45 decrypted by the decryption processing unit 44 is used for storing the data of the center device 1. Correctly matches the contents of the data stored in the large capacity file 2.

Step 25: Next, the terminal device 4 displays the contents of the data display buffer 45 on the display 6.

[0044]

As described above, according to the information processing apparatus of the present invention, there are an area using a read-only recording method and a rewritable area, and the read-only area is different for each medium. A device in which a recording medium in which an ID number is recorded in advance is connected, and the data to be written in the rewritable area of the recording medium is encrypted and decrypted using this ID number is stored. Even if the recording medium is illegally copied to another recording medium, the read-only area cannot be rewritten, so that the ID number of the other recording medium remains different from the ID number of the original recording medium. Cannot be decrypted correctly.

That is, the information processing apparatus of the present invention is more effective in preventing illegal copying than when a recording medium having only a rewritable area such as a flexible disk is used.

Further, no special writing device such as a conventional physical guard is required.

[Brief description of drawings]

FIG. 1 is a principle configuration diagram of the present invention.

FIG. 2 is an overall configuration diagram of an information processing apparatus according to an embodiment of the present invention.

FIG. 3 is a logical configuration diagram of a recording medium according to an embodiment of the present invention.

FIG. 4 is a diagram showing a physical configuration of a recording medium used in an embodiment of the present invention.

FIG. 5 is a flowchart showing an operation of delivering data from a terminal device to a center device according to an embodiment of the present invention.

FIG. 6 is a flowchart showing an operation when displaying data stored in a recording medium according to an embodiment of the present invention.

[Explanation of symbols]

 1 center device 2 large-capacity file for data storage 3 high-speed line 4 terminal device 5 recording medium 6 display 11 encryption ID section 12 key generation processing section 13 key section 14 data storage buffer 15 encryption processing section 16 encrypted data storage buffer 41 rewrite area display register 42 write data buffer 43 read data buffer 44 decryption processing unit 45 data display buffer 46 ID encryption processing unit 47 encryption ID unit 48 key generation processing unit 49 key unit 51 read only area 52 rewritable Area 100 Recording Medium 102 First Area 110 Display Device 120 Processing Means 130 Returning Means 140 Display Control Means 150 Connecting Means

Claims (1)

[Claims] 1. An information processing device for writing data to a recording medium and reading and displaying data from the recording medium, comprising: a first area in which fixed information is recorded in advance by using a read-only recording method. A connection / control means for connecting / controlling a recording medium composed of a second area using a rewritable recording system; a display control means for connecting / controlling a display device for displaying data; Processing means for processing the data using the fixed information of the first area, and reduction means for returning the processing result processed by the processing means to the original using the fixed information of the first area of the recording medium. When writing data to the recording medium, the processing result by the processing unit is written to the second area, and when reading / displaying data from the recording medium, read from the second area. An information processing apparatus, wherein the processed result is returned to the original data by the returning means, and the restored data is displayed on the display device.