JP2001212350A - Data memory device and data writing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data memory device capable of preventing fraudulent actions such as the rewriting of a game control program and the replacement of a ROM to the utmost and to provide a data writing device for writing data in this data memory device. SOLUTION: The game control program for controlling actions on the game of this slot machine is coded and stored in a coded data memory ROM 13 as coded data. The coded data stored in the coded data memory ROM 13 are decoded with a decoding key different from a coding key used for coding the game control program to be used for controlling the actions of the slot machine. The decoding key is stored in a decoded data memory ROM 14 formed separately from the coded data memory ROM 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data storage device provided in a gaming machine and a data writing device for writing data to the data storage device.

[0002]

2. Description of the Related Art A gaming machine such as a slot machine or a pachinko machine is provided with a game control board including a CPU, a RAM, and a ROM.
The game is controlled by executing a game control program stored in the OM.

[0003]

Therefore, the game control program stored in the ROM is required to be modified to allow a player to acquire a large number of medals or game balls, or to significantly increase the profit of the game store. If the program is rewritten as an unauthorized program, it is possible to execute a game content which is unilaterally advantageous to the player or the game store. Therefore, a game control program stored in the ROM is rewritten to the above-described unauthorized program, or a legitimate ROM mounted on the game control board is replaced with a back ROM storing the unauthorized program. It was done.

It is an object of the present invention to provide a data storage device capable of preventing illegal acts such as rewriting of a game control program and ROM exchange as much as possible, and a data writing device for writing data to the data storage device. To provide.

[0005]

According to a first aspect of the present invention, there is provided a data storage device provided in a game machine, comprising a predetermined encryption key and an encryption program. Encrypted data storage means for storing game control data at least partially encrypted by the same, and decryption data storage means for storing a decryption key different from the encryption key and a predetermined decryption program And a data storage device comprising:

The game control data is data relating to control of the gaming machine. The game control data may include a program (game control program) for controlling the gaming machine. According to the present invention, at least a part of the game control program is encrypted and stored in the encrypted data storage means. The decryption key for decrypting the encrypted game control data stored in the encrypted data storage means is different from the encryption key used when encrypting the game control program. Yes, and stored in the decrypted data storage means together with the decryption program.

With this configuration, for example, even if the encrypted data is read from the encrypted data storage means for an unauthorized purpose, it is difficult to decrypt the read encrypted data. In addition, since the encryption key and the decryption key are different, even if the decryption key can be read and the encrypted data can be decrypted, the encrypted data is stored in the encrypted data storage means using the decryption key. It is not possible to rewrite the existing encrypted data or create new encrypted data and write it to the encrypted data storage means. Therefore, rewriting of the game control program by a third party can be prevented as much as possible.

[0008] Even if the decrypted data storage means is constituted by, for example, two storage elements, one of the storage elements stores a decryption key and the other storage element stores a decryption program. Good. Further, it is preferable that the encrypted data storage unit and the decrypted data storage unit are provided in different storage elements, respectively. By doing so, if one of the encrypted data storage means and the decrypted data storage means is exchanged improperly, the decryption using the decryption key will not be performed properly. The illegal acquisition of the ball can be prevented as much as possible.

Further, the writing of data into the data storage device according to the first or second aspect can be achieved, for example, by using the data writing device according to the third aspect. That is, an invention according to claim 3 is a data writing device for writing data in the data storage device according to claim 1 or 2, wherein the encryption key for determining an encryption key for encrypting game control data is provided. Key determination means, encryption means for encrypting game control data based on the encryption key determined by the encryption key determination means and a predetermined encryption program, and game control encrypted by the encryption means Encrypted data writing means for writing data to encrypted data storage means provided in the data storage device, and decryption for determining a decryption key corresponding to the encryption key determined by the encryption key determination means Key determining means;
Decryption data writing means for writing the decryption key determined by the decryption key determination means and a predetermined decryption program to the decryption data storage means provided in the data storage device. It is a writing device.

According to a third aspect of the present invention, in the data writing device, the encryption key determining means determines a different encryption key for each data storage device. It is preferred that In this case, even if an encryption key for one data storage device (encrypted data storage means) is illegally obtained, the encrypted data stored in the data storage device is rewritten using the encryption key. Can not. Therefore, it is possible to prevent the back ROM in which the unauthorized program is written from being circulated in large quantities.

It is preferable that the encryption key determination means determines an encryption key by random number drawing. In this case, since the encryption key is determined by random number lottery, there is no correlation between the encryption keys between different data storage devices (encrypted data storage means), and the possibility of unauthorized acquisition of the encryption key is further reduced. be able to.

[0012]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a block diagram schematically showing a configuration of a game control board to which a data storage device according to one embodiment of the present invention is applied. The game control board 1 is, for example, a circuit board provided in a slot machine for controlling the basic contents of the game of the slot machine.

The game control board 1 has a control center C
PU 11, RAM 12 in which data necessary for control by the CPU 11 is written, ROM 13 for storing encrypted data, in which a game control program for controlling operations related to the game of this slot machine is stored as encrypted data. ROM for storing encrypted data
A decryption data storage ROM 14 storing a decryption program and a decryption key necessary for decrypting the encrypted data stored in the storage 13 is provided. In this embodiment, as shown in FIG.
PU11, RAM12 and ROM for storing decoded data
14 is realized by a one-chip microcomputer integrating these functions on one chip.

The CPU 11, RAM 12, ROM 13 for storing encrypted data, and RO for storing decrypted data.
M14 are mutually connected by a common bus 15. The bus 15 has an I / O (Input / Output) port 16.
Is connected. For example, the I / O port 16
Probability setting device 2 for setting the probability of winning being determined by a lottery for determining whether to execute a special game mode advantageous to the player (winning or non-winning), provided in this slot machine Each part of the slot machine such as a start lever 3 for instructing the start of rotation of the rotating reel and a stop button 4 for instructing stop of the rotating reel is connected.

When the power of the slot machine is turned on, the CPU 11 reads out the decryption program from the ROM 14 for storing decrypted data, stores the decrypted program in the RAM 12, and executes the decrypted program. In the decryption program,
First, the encrypted data is read from the encrypted data storage ROM 13 and stored in the RAM 12. The decryption key is read out from the decryption data storage ROM 14 and stored in the RAM 12. Then, the encrypted data is decrypted by using the read decryption key, and the decrypted game control program is stored in the RAM 12. This completes the decoding program. Thereafter, according to the game control program stored in the RAM 12, based on the signals output from the probability setting device 2, the start lever 3, and the stop button 4, the I / O port 16 The operation of each part of the slot machine connected to is controlled.

After the encrypted data is decrypted by the game control program, the decryption program and the decryption key stored in the RAM 12 are preferably deleted. By doing so, it is possible to prevent the decryption program and the decryption key from being read from the RAM 12 and being illegally used. FIG. 2 shows a ROM 1 for storing encrypted data.
3 and the decrypted data storage ROM 1 mounted on the game control board 1 together with the encrypted data storage ROM 13.
FIG. 4 is a diagram for describing data writing to a data No. 4;
Writing of data to the ROM 13 for storing encrypted data and the ROM 14 for storing decrypted data is achieved by a dedicated data writer 5, and the function of the data writer 5 is shown in FIG. It is shown blocked.

The data writing device 5 includes a serial number determining unit 51 for determining a serial number to be assigned to the ROM 13 for storing encrypted data. Serial number determination unit 5
1 determines a different serial number for each encrypted data storage ROM 13. This determined serial number is
Game control board 1 together with ROM 13 for storing encrypted data
Is also commonly used for the ROM 14 for storing decoded data. The serial number determined by the serial number determination unit 51 is provided to the encryption key / decryption key determination unit 52. The encryption key / decryption key determination unit 52 is configured to encrypt the game control program based on the serial number given from the serial number determination unit 51 and to use the encrypted game control program. Determine the decryption key used when decrypting the program. For example, the encryption key / decryption key determination unit 52 performs a random number lottery using the serial number determined by the serial number determination unit 51 as an input value, and uses the random number selected in the random number lottery to generate an encryption key and a random number. Determine the decryption key.

In this embodiment, the RSA encryption method is adopted as the encryption method of the game control program, and the encryption key and the decryption key determined by the encryption key / decryption key determination unit 52 are different from each other. Different from each other. Encryption key /
The encryption key determined by the decryption key determination unit 52 is provided to the encrypted data creation unit 53. Also, the encryption key /
A master ROM 6 storing a game control program is connected to the decryption key determination unit 52, and the game control program is input from the master ROM 6. The encrypted data creation unit 53 encrypts the game control program input from the master ROM 6 based on the encryption key provided from the encryption key / decryption key determination unit 52 according to a predetermined encryption program. Create encrypted data. Then, the created encrypted data is written into the encrypted data storage ROM 13.
Thereby, data writing to the encrypted data storage ROM 13 is achieved.

After the encrypted data is created, the encryption key used to create the encrypted data may be deleted. On the other hand, the encryption key / decryption key determination unit 52
The decryption key determined in step 4 is the decryption data storage ROM
14 is written. The decryption program is written in the decryption data storage ROM 14 by the decryption program writing unit 54 in advance, and the data writing to the decryption data storage ROM 14 is achieved by writing the decryption key.

The ROM 13 for storing the encrypted data and the ROM 1 for storing the decrypted data in which the data has been written as described above.
4 is mounted on the same game control board 1 in a mounting step performed thereafter. As described above, according to this embodiment, the game control program for controlling the operation related to the game of the slot machine is encrypted and stored in the encrypted data storage ROM 13 as encrypted data. Then, the encrypted data stored in the encrypted data storage ROM 13 is decrypted by using a decryption key different from the encryption key used when encrypting the game control program. It is used for operation control.

Therefore, for example, even if the encrypted data is read from the encrypted data storage ROM 13 for an unauthorized purpose, it is difficult to decrypt the read encrypted data. In addition, since the encryption key and the decryption key are different, even if the decryption key can be read to decrypt the encrypted data, the decryption key is used to store the encrypted data in the encrypted data storage ROM 13. It is not possible to rewrite the encrypted data or to create new encrypted data and write it to the encrypted data storage ROM 13. Therefore, rewriting of the game control program by a third party can be prevented as much as possible.

In this embodiment, the decryption key and the decryption program are stored in the decryption data storage ROM 14 provided separately from the encrypted data storage ROM 13 in which the encrypted data is stored. . As a result, if one of the encrypted data storage ROM 13 and the decrypted data storage ROM 14 is exchanged improperly, the decryption of the encrypted data using the decryption key will not be performed properly. Can be prevented as much as possible.

Further, according to this embodiment, a different encryption key is set for each encrypted data storage ROM 13, so that even one encrypted data storage ROM 13 is used.
Even if an encryption key related to the encrypted data is illegally acquired, it is not possible to rewrite the encrypted data stored in another encrypted data storage ROM 13 using this encryption key. Therefore, it is possible to prevent the back ROM in which the unauthorized program is written from being circulated in large quantities.

Still further, according to this embodiment, a random number lottery using the serial number determined by the serial number determination unit 51 as an input value is performed, and an encryption key and a random number are selected using the random numbers selected in the random number lottery. Since the decryption key is determined, there is no correlation between the encryption key and the decryption key between different encrypted data storage ROMs 13, and the possibility that the encryption key is illegally acquired is reduced. The serial number determined by the serial number determination unit 51 is stored on the chip surface of the encrypted data storage ROM 13 and the decrypted data storage ROM.
It is preferably printed on the surface of a chip (one-chip microcomputer) including OM14. By doing this,
ROM 13 for storing encrypted data created by using an encryption key, and ROM 14 for storing decrypted data corresponding to the encrypted key.
You can easily find the chip that is stored in
It is possible to reduce the trouble when mounting these on the game control board 1.

The serial number determined by the serial number determining unit 51 may be stored in the encrypted data storage ROM 13 and the decrypted data storage ROM 14. By reading the serial number from the encrypted data storage ROM 13 and the decrypted data storage ROM 14, the encrypted data storage ROM 13 and the corresponding decrypted data storage RO
M14.

Further, in this embodiment, all of the game control program is encrypted and the encrypted data storage RO is stored.
Although it is assumed that the game control program is stored in the M13, it is not always necessary to encrypt the entire game control program.
13 may be stored. The encryption method is R
In addition to the SA encryption method, for example, various encryption methods in which an encryption key and a decryption key are different from each other, such as an ElGamal encryption method and an elliptic curve encryption method, can be adopted.

Further, the present invention can be embodied in other forms. For example, in the above embodiment, the CPU
11, RAM 12, and ROM 14 for storing decrypted data
Is realized by a one-chip microcomputer, for example, as shown in FIG. 3, the CPU 11, the RAM 12, and the ROM 13 for storing encrypted data may be realized by a one-chip microcomputer, or the CPU 11, the RAM 12, the encrypted data ROM 13 for storage and RO for storage of decoded data
M14 may be composed of different chips.

In the above-described embodiment, both the decryption program and the decryption key are stored in the decryption data storage RO.
Although it is assumed that the decryption program or the decryption key is stored in the M14, one of the decryption program and the decryption key is stored in the decryption data storage ROM 14, and the other is stored in the newly provided ROM separately from the decryption data storage ROM 14. You may. Further, in the above-described embodiment, the slot machine has been described. However, the present invention can be widely applied to gaming machines other than the slot machine, such as a pachinko machine.

In addition, various design changes can be made within the scope of the matters described in the claims.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically showing a configuration of a game control board to which a data storage device according to one embodiment of the present invention is applied.

FIG. 2 is a diagram for explaining ROM for storing encrypted data and writing data to a ROM for storing decrypted data mounted on a game control board together with the ROM for storing encrypted data.

FIG. 3 is a block diagram for explaining another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Game control board 11 CPU 12 RAM 13 ROM for storing encrypted data (encrypted data storage means) 14 ROM for storing decrypted data (decrypted data storage means) 5 Data writing device 51 Serial number determination unit 52 Encryption key / Decryption key determination unit (encryption key determination unit, decryption key determination unit, decryption data writing unit) 53 Encrypted data generation unit (encryption unit, encryption data writing unit) 54 Decryption program writing Section (decryption data writing means)

Claims (5)

[Claims] 1. A data storage device provided in a gaming machine, comprising: encrypted data storage means for storing game control data at least partially encrypted by a predetermined encryption key and an encryption program; A data storage device, comprising: a decryption key different from the encryption key and a decryption data storage unit for storing a predetermined decryption program. 2. The data storage device according to claim 1, wherein said encrypted data storage means and said decrypted data storage means are provided in different storage elements. 3. A data writing device for writing data to a data storage device according to claim 1 or 2, wherein encryption key determining means for determining an encryption key for encrypting game control data; Encryption means for encrypting game control data based on the encryption key determined by the encryption key determination means and a predetermined encryption program; and game control data encrypted by the encryption means, Encryption data writing means for writing to encrypted data storage means provided in the storage device; decryption key determination means for determining a decryption key corresponding to the encryption key determined by the encryption key determination means; The decryption key determined by the encryption / decryption key determination means and a predetermined decryption program are written in the decryption data storage means provided in the data storage device. Data writing apparatus which comprises a non-decoded data write means. 4. The data writing device according to claim 3, wherein said encryption key determining means determines a different encryption key for each data storage device. 5. The data writing device according to claim 3, wherein said encryption key determining means determines an encryption key by random number drawing.