JP2004103027A - Game controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely prevent falsification of a game program. <P>SOLUTION: This game controller 1 controls operations of a game machine based on game program information Pr and constituted so that it has a memory 2 for storing the game program information Pr, a decoding means having a prescribed decoding key K and decoding algorithm A and for decoding information, a switching means 4 for switching writing information SP so that it is transmitted to the decoding means 3 when the writing information SP to the memory 2 is inputted from the outside and the decoding means 3 generates decoded writing information P by decoding the writing information SP from the switching means 4, outputs and writes the decoded writing information P in the memory 2. <P>COPYRIGHT: (C)2004,JPO

Description

The present invention relates to a game control device provided in each game machine for controlling the operation of the game machine based on game program information.

In recent years, gaming machines such as pachinko machines have been widely computerized and controlled by computers, and the contents of the games have been diversified by incorporating “big hits” into the game, and the entertainment as a game has become popular. Sex is also increasing. The game content is in accordance with a game program stored in a ROM, which is a nonvolatile memory.

By the way, in the computer-controlled gaming machine, the content of the game can be changed by replacing the ROM and replacing the game program, so that a new illegal operation of replacing and falsifying the game program so that the game content is advantageous to the player is provided. Acts began to occur. Then, once the game program is tampered with, the damage to the game store becomes extremely large, such as abnormal occurrence of "big hits". In addition, due to such misconduct, the soundness of the game is impaired, and the trust of the player is lost.

Therefore, in order to solve such a problem, for example, a ROM is formed integrally with the substrate, and the ROM itself cannot be replaced. However, even in this case, the game program is falsified by writing to the ROM. The tampering of the game program is still occurring.

(4) In order to prevent such a falsified game program from being written, for example, the following game program verification is performed. That is, a result obtained by performing a calculation process using a predetermined function on a regular game program is stored in advance in a memory as authentication data, and every time the game machine is started up, a calculation process using the same function is performed on the ROM game program. It is determined whether the calculation result matches the authentication data stored in advance, and if the two do not match, it is determined that the game program has been tampered with and a predetermined fraud handling process is performed. I have.

However, in the above-mentioned conventional game program verification method, authentication data having a large data amount irrelevant to the operation of the device is added to the memory, so not only the use range of the memory is narrowed, but also the authentication data itself is Since it is meaningless data, it becomes a hindrance to inspections such as debugging and disassembling.

Also, since the tampering of the game program itself is not prevented, the tampered game program will be operated until the next verification after the tampering of the game program, resulting in a great loss during that time. Was inviting.

検 証 In addition, since the verification is performed every time the game machine is started, it takes time to start the game machine, and the start-up is complicated.

Furthermore, the time required for each verification of the game program also increases in proportion to the data length, so that the device start-up time is variable depending on the data length, which hinders control of the entire device.

The present invention has been proposed in view of the above, and it is unnecessary to write authentication data having a large data amount in a memory, and it is possible to reliably prevent a game program from being tampered without performing a game program verification at the time of startup. It is an object of the present invention to provide a game control device capable of performing the game.

In order to achieve the above object, an invention according to claim 1 is provided in a game control device provided in each game machine for controlling the operation of the game machine based on the game program information, and a ROM storing the game program information. A decryption means for decrypting information by previously non-rewriting and non-accessing a predetermined decryption key and a predetermined decryption algorithm managed as a secret key, and information written to the memory. And a switching means for switching the write information to be sent to the decryption means when the information is input from the outside. The game program information of the original information has the same encryption key and encryption as the decryption key and the decryption algorithm, respectively. When writing information is generated by encrypting with the algorithm and this writing information is written to the game control device, A ROM writer is connected to the switching means, and the write information is input from the ROM writer through the switching means, and the decoding means decodes the write information from the switching means to generate decoded write information, and outputs the decoded write information. Is output to a memory as game program information and written, and thereafter, the ROM writer is separated and used.

According to a second aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the decryption / writing information decrypted and generated by the decryption means is compared with regular game program information. There is provided a coincidence determining means for determining whether or not the information coincides with each other, and when the decrypted write information matches the regular game program information, the decrypted write information is written to a memory.

According to a third aspect of the present invention, there is provided a game control device provided in each game machine for controlling the operation of the game machine based on the game program information, a memory serving as a ROM for storing the game program information, Decryption means for preliminarily and without inaccessibility of a predetermined decryption key and a predetermined decryption algorithm managed as a public key to decrypt information, and information written to the memory is externally input. Switching means for switching the write information to be sent to the decryption means, wherein the game program information of the original information is generated by using an authentication key issued by an authentication and certification organization and the same encryption key as the decryption key. Generates the write information by encrypting with the same composite encryption key and the same encryption algorithm as the above-mentioned decryption algorithm. When an encrypted authentication key is generated by encrypting with the encryption algorithm and this write information is written to the game control device, a ROM writer is connected to the switching means, and the write information and the encrypted authentication key are written in the ROM writer. The decryption means decrypts the input encrypted authentication key according to the decryption algorithm to generate a decryption authentication key, and then generates the decryption authentication key and the predetermined decryption key. A composite decryption key is generated, the input write information is decrypted using the decryption algorithm by the composite decryption key obtained in the composite key generation procedure, and the decrypted write information obtained by the decryption is stored in the memory. It is characterized by outputting and writing, and thereafter using the ROM writer separately.

In the game control device of the present invention, the write information is decrypted by using the built-in decryption key and the algorithm. Therefore, as long as the decryption key of the decryption means is not disclosed to a third party, the third information is decrypted. Even if a player creates and inputs write information, the decrypted write information is not correctly decrypted, cannot be legitimate game program information, and reliably prevents tampering of game program information stored in the memory. be able to.

In addition, by adding a configuration for decrypting the write information using the synthetic decryption key, the encryption process at the stage of creating the write information requires the prior knowledge of the decryption authentication key, the decryption key, and the decryption algorithm. Therefore, the possibility that a third party can perform the encryption process in advance is further reduced, and the tampering of the game program information stored in the memory can be more reliably prevented. .

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a principle block diagram of the game control device of the present invention. In the figure, a game control device 1 of the present invention is a device provided in each game machine for controlling the operation of the game machine based on game program information Pr, and a memory 2 for storing game program information Pr, The decryption means 3 having a decryption key K and a decryption algorithm A for decrypting information, and switching so as to send the write information SP to the decryption means 3 when write information SP to the memory 2 is input from outside. Switching means 4, wherein the decoding means 3 decodes the write information SP from the switching means 4 to generate decoded write information P, and outputs the decoded write information P to the memory 2 for writing. , Is characterized.

In this case, if the game program information Pr has been written in the memory 2 in advance, the decrypted write information P is overwritten on the game program information Pr. If nothing has been written in the memory 2, the decryption write information P is newly written. Thereafter, the game control device 1 treats the decrypted write information P as game program information, and controls the operation of the gaming machine based on the decrypted write information P.

As described above, in this embodiment, when the write information SP to the memory 2 is externally input, the write information SP is always sent to the decryption means 3 and the decrypted write information Information P is written to the memory 2.

Here, the write information SP will be described. As described above, obtaining the decrypted write information P by decrypting the write information SP means that the write information SP is obtained by encrypting the decrypted write information P. . Then, as shown in the figure, the write information SP for obtaining the desired decrypted write information P as the game program information is, as shown in FIG. 6 and can be obtained by encryption. The encryption in the encryption means 6 must be performed on the original information P using the encryption algorithm A with the encryption key K.

Note that the encryption key K and the decryption key K in this case are the same key K, and differ only in whether they are used for encryption or decryption. Similarly, the encryption algorithm A and the decryption algorithm A are the same algorithm A, and differ only in whether the algorithm is used for encryption or decryption.

In order to encrypt the original information P in the encryption means 6, it is necessary to know in advance the decryption key K of the decryption means 3 and the algorithm A, but as long as the decryption key K is managed as a secret key, The three cannot know the decryption key K. Therefore, even if a third party creates write information from the original information P in such a situation and inputs the write information from the outside, the decrypted write information obtained as a result of the decryption processing matches the original information P. Without this, it becomes meaningless information that does not hold as a program. Even if such decryption / writing information is written in the memory 2, the game control device 1 does not function properly, causing the game machine to run out of control, and cannot be used thereafter. That is, illegal rewriting of the game program information can be prevented.

Thus, as long as the decryption key K embedded in the game control device 1 is not disclosed to a third party, even if the third party creates and inputs the write information SP, use of the write information SP is prevented, and therefore, the memory 2 is used. Can be securely prevented from being falsified.

Also, even if the game program information that has been illegally encrypted is externally input and rewritten, the game machine will not operate normally and will run away, so that the illegality can be immediately detected and the illegal game program Since the game is not established, there is no loss at the game store.

Furthermore, since only the game program information is written in the memory, and the information necessary for authentication is not written, the memory can be utilized as efficiently as possible.

In the above description, the decrypted write information P is written in the memory 2 as it is. However, before the decrypted write information P is written in the memory 2, the decrypted write information P is compared with regular game program information and written only when they match. You may. In this case, the regular game program information is stored in an external storage device in advance, for example. In this way, by confirming the match before writing to the memory 2, it is possible to reliably prevent unauthorized game program information from being written.

This game control device 1 is provided with the following self-verification means 5 and authenticates the decryption key K and the decryption algorithm A stored in the decryption means 3 by itself. That is, the self-verification unit 5 outputs the self-inspection information SI to the decoding unit 3 among the self-inspection information SI and the self-inspection reference information I0 stored in advance in a non-rewritable manner.

The self-inspection information SI is information generated by encrypting the self-inspection reference information I0 with the encryption key K using the encryption algorithm A. Therefore, if the self-test information SI is decrypted using the decryption algorithm A with the decryption key K, the information matches the self-test reference information I0.

The self-verifying unit 5 receives the decoded self-check information I decoded by the decoding unit 3 from the decoding unit 3, compares the decoded self-check information I with the self-check reference information I0, and determines whether or not both match. Is determined. As described above, the decryption self-check information I and the self-check reference information I0 are originally matched, but if they do not match, the decryption key K or the decryption algorithm A is tampered with. In such a case, an unauthorized response process such as stopping the operation of the gaming machine is performed.

Even if a third party falsifies the decryption by the decryption means 3 by altering the decryption key K or the decryption algorithm A of the decryption means 3 and rewrites the game program information, in this embodiment, the self-verification is performed. Therefore, tampering in the decryption means 3 can be reliably detected.

If the authentication of the decryption key K or the like by this self-verification is performed, rewriting of the game program information in the memory 2 can be completely prevented without fail. 1 can be sufficiently maintained.

In addition, since this self-verification only decrypts and compares the self-inspection information, the amount of data to be processed is small and can be completed in a short period of time. It is possible to shift to a normal operation of the gaming machine.

FIG. 2 is a principle block diagram of the second embodiment of the present invention. In the figure, a game control device 10 of the present invention is a device provided in each game machine for controlling the operation of the game machine based on the game program information Pr, and a memory 20 for storing the game program information Pr, The decryption means 30 having the decryption key K2 and the decryption algorithm A and performing decryption of information is switched so that when the write information SP to the memory 20 is input from outside, the write information SP is transmitted to the decryption means 30. Switching means 40, and the decryption means 30 decrypts the input encrypted authentication key SK1 in accordance with the decryption algorithm A to generate a decrypted authentication key K1, and then generates the decrypted authentication key K1 and a predetermined decryption key. A composite decryption key K3 is generated with the key K2, and the decryption algorithm A is used with the composite decryption key K3 obtained by the composite key generation procedure. Decoding the force has been written information SP, and the decoded write information P obtained by the decoding to write to output to the memory 20, it is characterized in that.

In this case, as in the first embodiment, if the game program information Pr has been written in the memory 20 in advance, the decrypted write information P is overwritten on the game program information Pr. If nothing is written in the memory 20, the decryption write information P is newly written. Thereafter, the game control device 10 treats the decrypted write information P as game program information, and controls the operation of the gaming machine based on the decrypted write information P.

Also, as in the case of the first embodiment, in this embodiment, when the write information SP to the memory 20 is externally input, the write information SP is always sent to the decryption means 30 and the decryption is performed. The decrypted write information P decrypted by the means 30 is written to the memory 20.

Here, the encryption authentication key SK1 and the write information SP will be described. As shown in the figure, the encrypted authentication key SK1 is obtained by encrypting the authentication key K1 using the encryption algorithm A in the encryption means 61, while the write information SP is transmitted to the authentication means 62 in the encryption means 62. A composite encryption key K3 is generated using the key K1 and the encryption key K2, and the original information P as the desired decryption write information P is obtained by encrypting the composite encryption key K3 using the encryption algorithm A.

Note that the authentication key K1 and the decryption authentication key K1 in this case are the same key K1, and differ only in whether the key is used for encryption or decryption. Similarly, the encryption key K2 and the decryption key K2 are the same key K2, and differ only in that they are used for encryption or decryption. Further, as in the case of the first embodiment, the encryption algorithm A and the decryption algorithm A are the same algorithm A, and differ only in whether they are used for encryption or decryption.

As described above, the decryption means 30 in the second embodiment uses a decryption key K1 generated by decrypting the externally encrypted authentication key SK1 and a decryption key K2 previously possessed to generate a composite decryption key K3. Is generated, and the write information SP is decrypted using the composite decryption key K3. That is, in the encryption process at the stage of creating the write information SP, it is necessary to know both the decryption authentication key K1 and the decryption key K2 in advance, and therefore, a third party can perform the encryption process in advance. The possibility is further reduced, and the falsification of the game program information stored in the memory 20 is more reliably prevented.

As in the first embodiment, the game control device 10 includes a self-verification unit 50 as described below, and authenticates the decryption key K2 and the decryption algorithm A stored in the decryption unit 30 by itself. It is done in. That is, the self-verification unit 50 decodes the encrypted authentication key SK1 and the self-inspection information SI out of the encrypted authentication key SK1, the self-inspection information SI, and the self-inspection reference information I0 stored in advance in a non-rewritable manner. , And compares the decoded self-check information I decoded by the decoding means 30 with the self-check reference information I0.

The self-inspection information SI is generated by subjecting the self-inspection reference information I0 to an encryption process using an encryption algorithm A with a combined encryption key K3 generated by combining the authentication key K1 and the encryption key K2. Information. Therefore, if the self-test information SI is decrypted using the decryption algorithm A with the combined decryption key K3, the information matches the self-test reference information I0.

The decryption means 30 generates a composite decryption key K3 by the above-described composite key generation procedure based on the encrypted authentication key SK1 from the self-verification means 50, and decrypts the self-inspection information SI by using the composite decryption key K3. And outputs the decrypted self-inspection information SI to the self-verification means 50. Then, the self-verification means 50 determines whether or not the transmitted decrypted self-check information I matches the self-check reference information I0 stored in advance. As in the case of the first embodiment, the decryption self-check information I and the self-check reference information I0 originally match, but if they do not match, the decryption key in the decryption means 30 Assuming that the K2 or the decryption algorithm A has been tampered with, unauthorized processing such as stopping the operation of the subsequent gaming machine is performed.

As described above, since the self-verifying unit 50 outputs the encrypted authentication key SK1 to the decoding unit 30 in addition to the self-inspection information SI, the self-verification unit 50 performs the decoding using the decoding algorithm A with the combined decoding key K3. Self-verification corresponding to the configuration of the means 30 can be performed, and tampering in the decoding means 30 can be reliably detected. Therefore, the security of the decryption means 30 can be reliably ensured, and it is possible to completely prevent an unauthorized act on the game control device 1.

Next, a specific configuration example in the second embodiment will be described with reference to FIG. In the following description, a case will be described in which a gaming machine maker receives a master file from an authentication and certification organization and writes the master file in a ROM of the gaming control device.

FIG. 3 is a diagram showing a configuration example of a game control device of the present invention. In the figure, a game control device 100 is configured as a system LSI for controlling the operation of a game machine, and includes a CPU 101, an R / W (read / write) selection circuit 106, a ROM 102, a mask ROM 109, a switching circuit 104, a decoding circuit 103, It has verification circuits 105, which are commonly connected to a bus 110 for addresses and data. A ROM writer 107 having a master file 108 is provided outside the game control device 100. The ROM writer 107 is connected to a bus 110 via an R / W selection circuit 106.

The master file 108 is a storage medium such as a floppy disk, an IC memory card, or a PROM. The master file 108 includes regular game program information P0 certified by a certification / certification organization, and a certification issued by a certification / certification organization to a game machine maker. A key K1, an encrypted authentication key SK1 obtained by encrypting the authentication key K1, and write information SP to be written into the ROM 102 of the game control device 100 are stored in advance.

The game program information P0 includes the game program itself and various data necessary for the game program. The encryption authentication key SK1 is obtained by encrypting the authentication key K1 according to a data encryption (decryption) algorithm A such as DES (data encryption standard). In addition, the writing information SP is obtained by combining the authentication key K1 corresponding to the key body and the encryption key K2 corresponding to the groove shape of the key with a combined encryption key K3 formed by combining the authentication key K1 and the regular game program information using the algorithm A. This is obtained by encrypting P0.

The algorithm A and the encryption key K2 are previously stored in the decryption circuit 103 in a non-rewritable and inaccessible state. In the decryption circuit 103, the authentication key K1 is a decryption authentication key K1, the encryption key K2 is a decryption key K2, the composite encryption key K3 is a composite decryption key K3, and the algorithm A is a decryption algorithm A. Shall be used.

(4) The self-verification circuit 105 previously stores the self-check information SI, the encrypted authentication key SK1, and the self-reference information I0 in a non-rewritable manner.

(4) Further, the self-verification program PD is stored in the mask ROM 109 in advance so that it cannot be rewritten.

In the game control device 100 having the above configuration, the writing of the game program information to the ROM 102 is performed as follows. First, the master file 108 is connected to the ROM writer 107, and in the ROM writer 107, the ROM mode and the write mode W are turned on. At this time, the ROM 102 enters a writable state based on a signal from the R / W selection circuit 106. Further, the encrypted authentication key SK1 and the write information SP of the master file 108 are sent to the switching circuit 104, and further sent to the decryption circuit 103 by the operation of the switching circuit 104.

The decryption circuit 103 decrypts the input encrypted authentication key SK1 according to the decryption algorithm A to generate a decryption authentication key K1, and subsequently generates a composite decryption key K3 using the decryption authentication key K1 and the decryption key K2. The input write information SP is decrypted using the decryption algorithm A using the composite decryption key K3, and the decrypted write information P obtained by the decryption is output to the ROM 102.

(4) Since the ROM 102 at this time is in a writable state as described above, the decrypted write information P is written in the ROM 102.

The write information SP of the master file 108 is generated by performing an encryption process on the regular game program information P0 using the authentication key K1, the encryption key K2, and the algorithm A, while the decryption write information P is Since the decryption processing is performed by using the authentication key K1, the decryption key K2 and the algorithm A, and the encryption and decryption are completely associated, the decryption write information P is the same as the regular game program information P0. It will be the same.

If the write information SP is created by a third party who does not know in advance any one of the authentication key K1, the encryption key (decryption key) K2, or the algorithm A, the decryption write information P is a regular Does not match the game program information P0 of the game machine. Therefore, as described above, even if the game machine is operated, the game machine runs out of control.

In this case, before writing the decryption write information P to the ROM 102, the decryption write information P may be compared with the regular game program information P0, and may be written only when they match. In that case, in the ROM writer 107, the ROM mode and the read mode R are turned on. At this time, the decryption write information P and the decryption authentication key K1 generated by the decryption circuit 103 are fed back to the ROM writer 107 via the switching circuit 104, and the ROM writer 107 uses the regular game program information P0 and the authentication key of the master file. Each comparison with K1 is made. Then, only when the decryption / write information P matches the regular game program information P0 and the decryption authentication key K1 matches the authentication key K1 of the master file, the decryption / write information P is written to the ROM 102. . In this way, by confirming the match before writing to the ROM 102, it is possible to reliably prevent unauthorized game program information from being written.

{Circle around (1)} The game control device 100 having the above configuration authenticates the decryption key K2 and the decryption algorithm A stored in the decryption circuit 103 by itself. This self-verification is performed by a cooperative operation of an operation by software performed by the CPU 101 in accordance with the self-verification program PD in the mask ROM 109 and an operation performed by the self-verification circuit 105, and is performed every time the power is turned on.

That is, the self-verification circuit 105 first outputs the encrypted authentication key SK1 and the self-check information SI to the decryption circuit 103 based on a command from the CPU 101. Next, the decryption circuit 103 generates a composite decryption key K3 by the above-described composite key generation procedure based on the encrypted authentication key SK1, and uses the composite decryption key K3 and the decryption algorithm A to perform self-verification. The self-inspection information SI from the circuit 105 is decoded, and the decoded self-inspection information SI is output to the self-verification circuit 105. The self-verification circuit 105 determines whether or not the decrypted self-check information I matches the self-check reference information I0 stored in advance. Assuming that the K2 or the decryption algorithm A has been tampered with, unauthorized processing such as stopping the operation of the gaming machine thereafter is performed.

As described above, in the present invention, the write information is decrypted by using the built-in decryption key and the algorithm. Even if the three parties create and input the write information, the decrypted write information is not correctly decrypted and cannot be legitimate game program information. Therefore, even if the game program information is rewritten from the outside, the gaming machine cannot be operated normally and its use can be prevented, so that the tampering of the game program information stored in the memory can be reliably prevented. it can.

Also, even if an attempt is made to illegally rewrite the game program information from the outside, the gaming machine will not operate properly and will run away, so that the illegality can be immediately detected and the game in the illegal game program will not be established. Also, there is no loss of the game store.

Also, since only the game program information is written in the memory, and the information necessary for authentication is not written, the memory can be utilized as efficiently as possible.

According to the third aspect of the present invention, since the inside of the decryption means is self-verified, even if a third party falsifies the decryption key or the decryption algorithm of the decryption means, the decryption by the decryption means is skillfully performed. Even if the game program information is rewritten, the tampering in the decryption means can be reliably detected by self-verification.

If the authentication of the decryption key or the like by the self-verification is performed, the rewriting of the game program information in the memory can be completely prevented without fail. Can be kept sufficiently.

In addition, since this self-verification only decrypts and compares the self-inspection information, the amount of data to be processed is small and can be completed in a short period of time. It is possible to shift to a normal operation of the gaming machine.

Further, in the present invention, the decryption means generates a composite decryption key using a decryption authentication key generated by decrypting an externally-encrypted authentication key and a decryption key owned in advance, and writes the write information using the composite decryption key. Since decryption is performed, it is necessary to know in advance the decryption authentication key, the decryption key, and the decryption algorithm in the encryption process at the stage of creating the write information. The possibility that the three parties can perform the encryption process in advance is further reduced, and the falsification of the game program information stored in the memory can be more reliably prevented.

Further, since the self-verification means outputs the encrypted authentication key to the decryption means in addition to the self-inspection information, the self-verification means conforms to the configuration of the decryption means for decrypting the information using the decryption algorithm with the combined decryption key. And tampering in the decryption means can be reliably detected. Therefore, the security of the decryption means can be reliably ensured, and it is possible to completely prevent an unauthorized act on the game control device.

It is a principle block diagram of the game control device of this invention. It is a principle block diagram in a 2nd embodiment of this invention. It is a figure showing an example of composition of a game control device of the present invention.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Game control device 2 Memory 3 Decoding means 4 Switching means 5 Self-verification means 6 Encryption means 10 Game control device 20 Memory 30 Decoding means 40 Switching means 50 Self-verification means 61 Encryption means 62 Encryption means 100 Game control device 101 CPU
102 ROM
103 Decoding circuit 104 Switching circuit 105 Self-verification circuit 106 R / W selection circuit 107 ROM writer 108 Master file 109 Mask ROM
A Decryption algorithm (encryption algorithm, algorithm)
I decryption self-check information I0 self-check reference information K decryption key (encryption key)
K1 decryption authentication key (authentication key)
K2 decryption key (encryption key)
K3 synthetic decryption key (synthetic encryption key)
P decryption write information (original information)
Pr game program information P0 legitimate game program information SI self-check information SK1 encryption authentication key SP write information

Claims (3)

In a game control device provided in each game machine and controlling the operation of the game machine based on game program information,
A memory as a ROM for storing the game program information,
Decryption means for decrypting information having a predetermined decryption key and a predetermined decryption algorithm managed as a private key in a non-rewriteable and inaccessible manner in advance,
Switching means for switching the write information to be sent to the decoding means when write information to the memory is externally input;
Has,
When the game program information of the original information is encrypted with the same encryption key and encryption algorithm as the above-mentioned decryption key and decryption algorithm to generate write information, and when writing the write information to the game control device, the switching means Connected to a ROM writer, and input the write information from the ROM writer through the switching means.
The decoding means decodes the writing information from the switching means to generate decoding writing information, and outputs the decoding writing information to a memory as game program information and writes the same.
After that, separate the ROM writer and use it.
A game control device characterized by the above-mentioned. Decoding write information generated by decoding by the decoding means is compared with regular game program information, and match determination means for determining whether or not both match is provided.
When the decryption write information and the regular game program information match, the decryption write information is written to the memory,
The game control device according to claim 1, wherein: In a game control device provided in each game machine and controlling the operation of the game machine based on game program information,
A memory as a ROM for storing the game program information,
A decryption means for decrypting information having a predetermined decryption key and a predetermined decryption algorithm which are managed as an undisclosed key in advance and non-rewriteable and inaccessible;
Switching means for switching the write information to be sent to the decoding means when write information to the memory is externally input;
Has,
The game program information of the original information is encrypted with a synthetic encryption key generated by using an authentication key issued by a certification authority and the same encryption key as the above-mentioned decryption key and the same encryption algorithm as the above-mentioned decryption algorithm, and the write information is written Is generated, and the authentication key is encrypted with the encryption algorithm to generate an encrypted authentication key. When writing this write information to the game control device, a ROM writer is connected to the switching means, and the write information and Input the encrypted authentication key from the ROM writer through the switching means,
The decryption means decrypts the input encrypted authentication key according to the decryption algorithm to generate a decryption authentication key, and then generates a composite decryption key using the decryption authentication key and the predetermined decryption key. Using the above-described decryption algorithm with the composite decryption key obtained in the key generation procedure, the input write information is decrypted, and the decrypted write information obtained by the decryption is output to the memory for writing.
After that, separate the ROM writer and use it.
A game control device characterized by the above-mentioned.

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