JP6137808B2 - Gaming machine control board, chip, and related method - Google Patents

Description

  The present invention relates to a gaming machine control board and a gaming machine control chip that can be mounted on the board, and is particularly configured to control activation of a central processing unit (CPU) mounted on the board. The present invention relates to a substrate and a chip. Furthermore, the present invention relates to a method for controlling activation of a central processing unit mounted on a gaming machine control board.

  A gaming machine such as a pachinko or pachislot machine installed in a game hall (game hall) has conventionally been provided with various means for preventing unauthorized manipulation of control programs and control data for game operations. . As an example, Patent Document 1 describes a main CPU (main chip) mounted on a main board in a gaming machine and a chip identification number given to a sub CPU (sub chip) mounted on a sub board, and then the operation of the gaming machine. An invention is described in which these identification numbers are exchanged and authenticated between chips at any timing including the inside, and when the processing cannot be performed properly, the operation of the gaming machine is stopped.

  However, the specifications of gaming machines are strictly regulated in order to prevent fraud, fairness among players, etc., and the means described in Patent Document 1 may not be able to be taken. Specifically, the invention described in Patent Document 1 is based on the premise that bidirectional communication is performed between the main chip and the sub chip in an embodiment. Data transmission to the main chip is prohibited, and the identification number cannot be exchanged by bidirectional communication between the chips.

  In the invention described in Patent Document 1, on the premise that the main CPU and the sub CPU are activated, the recognition numbers are exchanged and authenticated by the operation of these CPUs. If a security check is performed on the external memory of the gaming machine and the CPU is not activated if it cannot be confirmed that it is safe, a game with illegal tampering It is possible to more reliably prevent the machine from operating.

JP 2007-89942 A

  In view of the above, the present invention is used in a gaming machine or the like as a gaming machine control board that controls the effect of a gaming machine based on a control signal transmitted from a main board, before the CPU mounted on the game machine operates. Providing a gaming machine control board capable of performing a security check of an external memory and controlling the operation of the CPU according to the result, and a chip mounted on the board and responsible for such operation control processing It is an object to provide an operation control method.

  In order to solve the above-described problems, the present invention provides a gaming machine control board for controlling a display of a picture by liquid crystal of a gaming machine based on a control signal transmitted from a main board, and the control signal in an encrypted state is used as a main control signal. An encryption communication unit that receives and decrypts from the board, a central processing unit that controls the display of the game machine's picture based on the decrypted control signal, and an operation used to control the display of the game machine's picture by the central processing unit A memory unit for storing control data, the memory unit further stores data for authenticating the memory unit for authenticating the memory unit, and the memory unit is authentic using the memory unit authentication data. Is configured to notify the encryption communication unit of the memory unit authentication result in response to an inquiry from the encryption communication unit. The cryptographic communication unit operates the central processing unit so that the central processing unit can operate only when the cryptographic communication unit is notified of the memory unit authentication result indicating that the memory unit is genuine. Provided is a gaming machine control board configured to be controlled.

  In the gaming machine control board configured as described above, a memory unit that stores operation control data such as an operation program for the gaming machine control board performs its own authentication process. Further, when the power is turned on, the central processing unit is prevented from being activated by the cryptographic communication unit responsible for cryptographic communication processing from the main board until the memory unit can be confirmed to be authentic by the authentication processing. . After startup, periodically or at any time (by an instruction from the main board, etc.), the cryptographic communication unit communicates with the memory unit to check the status of the authentication process, and if there is an abnormality in the authentication of the memory unit The operation of the central processing unit is stopped or a special operation such as an alarm is performed. Thus, the cooperation of the memory unit and the cryptographic communication unit can prevent the central processing unit on the substrate from operating while the memory unit that has been tampered with is mounted on the substrate.

  Control of the operation of the central processing unit by the cryptographic communication unit at the time of start-up, etc., sends a reset signal to the central processing unit, queries the memory unit for the memory unit authentication result, It can be implemented by stopping the transmission of the reset signal in response to the memory unit authentication result indicating that the memory unit is notified from the memory unit. This reset enables the processor in the memory unit to inspect the internal memory while avoiding contention when accessing the internal memory with the central processing unit. By continuing to transmit the reset signal, the central processing unit can be stopped until it is confirmed that the memory unit is legitimate, and the authentication result is inquired from the encryption communication unit to the memory unit after activation. If constituted in this way, it is possible to prevent an illegal act such as replacing a memory unit after activation.

  The inquiry from the encryption communication unit to the memory unit and the notification from the memory unit to the encryption communication unit performed in response to the inquiry are preferably performed by transmission / reception of a signal encrypted using the encryption key. If communication between units is encrypted communication in this manner, the risk of authentication of the memory unit according to the present invention and the operation control of the central processing unit in conjunction with this is reduced.

  After storing mutual authentication data for authenticating each other in the cryptographic communication unit and the memory unit, an inquiry from the cryptographic communication unit and a notification of a memory unit authentication result from the memory unit are sent to the cryptographic communication unit and the memory. It is preferable that the gaming machine control board according to the present invention is configured so that the mutual authentication with the unit is performed after it is confirmed that each other is a valid communication partner. If communication between units is such mutual authentication communication, the encryption communication unit and the memory unit correspond to the original gaming machine product prior to the inquiry and notification of the memory unit authentication result between the units. I can confirm that there is. In this way, the memory unit authentication process is performed using the memory unit for the other product, and after the authentication process is completed, the memory unit for the original product is connected by connecting a modified memory unit for the original product. It is possible to prevent fraud such as avoiding the authentication process for. However, if priority is given to the simplification of the entire process, such mutual authentication can be omitted.

  In addition, the control signal transmitted from the main board to the gaming machine control board includes first gaming machine identification data for identifying the gaming machine corresponding to the main board. The memory unit authentication result notified to the memory unit includes the second gaming machine identification data for identifying the gaming machine corresponding to the memory unit. The game machine identified by the first and second gaming machine identification data is the same when the cryptographic communication unit is notified from the memory unit of the memory unit authentication result indicating that The central processing unit may be controlled so that the central processing unit is operable only in such a case. With such a configuration, if it is confirmed that the main board and the memory unit are compatible with the same gaming machine product, illegal actions such as replacing the sub board only during the authentication process and avoiding the authentication process may be performed. Can be prevented.

  Authentication of whether or not the memory unit is authentic by the memory unit, inquiry of the memory unit authentication result by the encryption communication unit, notification of the memory unit authentication result in response to the inquiry, and control of the operation of the central processing unit by the encryption communication unit The above process is preferably executed every time after the gaming machine is turned on and before the game operation is executed.

  The cryptographic communication unit may be included as a part of the central processing unit.

  Further, the present invention is a gaming machine control chip that can be mounted on a gaming machine control board that controls a picture display by liquid crystal of a gaming machine based on a control signal transmitted from a main board, and is in an encrypted state. The control signal is received from the main board, decrypted, and the decrypted control signal is transmitted to the central processing unit mounted on the gaming machine control board, thereby operating as an encryption communication unit of the gaming machine control board and The memory unit mounted on the machine control board is inquired about the authentication result of whether or not the memory unit is authorized, and the gaming machine control chip receives the authentication result indicating that the memory unit is authorized from the memory unit. It is configured to control the operation of the central processing unit so that the central processing unit can be operated only when notified. To provide the work machine control chip. If a chip according to the present invention is used as a chip for encryption communication with a main board in a sub-board of a gaming machine or the like, it is combined with a memory unit having an authentication function for itself until authentication of the memory unit is completed. Control that the central processing unit is not operated is possible.

  Note that the gaming machine control chip may be included in the central processing unit as a part thereof.

  The present invention is also a method for controlling the operation of a central processing unit mounted on a gaming machine control board that controls picture display by liquid crystal of the gaming machine based on a control signal transmitted from the main board, Memory unit authentication for authenticating the memory unit stored in the memory unit, which is stored in the memory unit, which stores display operation control data used for controlling the display of the game machine's picture by the unit From the encryption communication unit mounted on the gaming machine control board that authenticates whether the memory unit is legitimate using the data for use, and receives and decrypts the encrypted control signal from the main board In response to the inquiry, the memory unit notifies the encrypted communication unit of the memory unit authentication result, and the encrypted communication unit The operation of the central processing unit is controlled so that the central processing unit can be operated only when the cryptographic communication unit is notified of the result of authentication of the memory unit by the memory unit. I will provide a.

  Control of the operation of the central processing unit by the cryptographic communication unit is performed by sending a reset signal to the central processing unit, inquiring the memory unit authentication result to the memory unit, and confirming that the memory unit is authentic. In response to the notification of the memory unit authentication result shown from the memory unit, the transmission of the reset signal is stopped. Thus, as described above, the central processing unit can be kept stopped until it can be confirmed that the memory unit is genuine, and the encryption communication unit can query the memory unit for the authentication result. It is possible to prevent an illegal act of replacing the memory unit after authentication at the time of activation is completed.

  The inquiry from the encryption communication unit to the memory unit and the notification from the memory unit to the encryption communication unit performed in response to the inquiry are preferably performed by transmission / reception of a signal encrypted using the encryption key. As described above, if communication between units is encrypted communication in this way, the risk of being known to others by authentication of the memory unit according to the present invention and operation control of the central processing unit linked thereto is reduced.

  The cryptographic communication unit and the memory unit used in the method according to the present invention further store mutual authentication data for authenticating each other, and the inquiry from the cryptographic communication unit and the memory unit authentication result from the memory unit are stored. It is preferable that the operation control method according to the present invention is configured so that the notification is performed after mutual authentication between the encryption communication unit and the memory unit is confirmed as a valid communication partner. As described above, if communication between units is such mutual authentication communication, memory unit authentication processing is performed using the memory unit for other products, and the memory unit for the original product is connected after the authentication processing is completed. Thus, fraudulent acts such as avoiding authentication processing for the original memory unit for the product can be prevented.

  Further, the control signal transmitted from the main board to the gaming machine control board includes first gaming machine identification data for identifying the gaming machine corresponding to the main board. The memory unit authentication result notified to includes the second gaming machine identification data for identifying the gaming machine corresponding to the memory unit, and the operation of the central processing unit by the cryptographic communication unit The memory unit authentication result indicating that the memory unit is legitimate is notified from the memory unit to the encryption communication unit, and is identified by the first and second gaming machine identification data. The central processing unit may be configured to be operable only when the gaming machines to be played are the same. As already described, such a configuration can also prevent illegal acts such as changing the sub-board only during the authentication process to avoid the authentication process.

  Authentication of whether or not the memory unit is authentic by the memory unit, inquiry of the memory unit authentication result by the encryption communication unit, notification of the memory unit authentication result in response to the inquiry, and control of the operation of the central processing unit by the encryption communication unit In the operation control method according to the present invention, the above-described process is preferably executed every time after the game machine is turned on and before the game operation is executed.

  The cryptographic communication unit may be included as a part of the central processing unit.

  In the above description, the control of the operation of the central processing unit by the cryptographic communication unit is performed by transmitting a reset signal to the central processing unit, but this authentication may be performed by disconnecting the signal line for transmitting this reset. There is a possibility of invalidating. For this purpose, the encryption communication unit and the central processing unit may be integrated as an IC so that this signal line does not come out. Therefore, it is more effective to carry out the above method in a unit in which a cipher that integrates a central processing unit by a cryptographic communication unit and a central processing unit.

Also, in the operation control method of the central processing unit according to the present invention, instead of using the reset signal to the central processing unit, the encryption communication unit does not decrypt the encryption communication sent from the main board, The central processing unit may be configured so that no instruction is given from any main board. That is, the present invention is a countermeasure against unauthorized tampering by preventing the operation of the central processing unit mounted on the gaming machine control board that controls the effect of the gaming machine based on the control signal transmitted from the main board. To do.

  According to the present invention, the operation control of authenticating the memory unit before the operation of the central processing unit of the control board for gaming machines and not operating the central processing unit until it can be confirmed that the memory unit is genuine. It becomes possible. Thereby, it is possible to effectively prevent an illegal act of operating a gaming machine using an external memory that has been illegally altered.

1 is a block diagram showing a schematic configuration of a gaming machine including a main board 1 and an image control sub board 2 which is an embodiment of a gaming machine control board according to the present invention. FIG. 2 is a block diagram showing an internal configuration of a main CPU 6 and an encryption communication unit 7 mounted on a main board 1. FIG. 3 is a block diagram showing an internal configuration of an image processing CPU 9 mounted on the image control sub-board 2. FIG. 3 is a block diagram showing a configuration of an encryption communication unit 7 mounted on the main board 1. FIG. 3 is a block diagram showing a configuration of an encryption communication unit 8 mounted on an image control sub-board 2. FIG. 2 is a block diagram showing a configuration of a memory unit 10 mounted on an image control sub-board 2. FIG. It is a flowchart showing the procedure of the operation control process of CPU9 for image processing by this invention. FIG. 8 is a diagram illustrating details of mutual authentication in step S703 in the flowchart of FIG. FIG. 8 is a diagram for explaining the details of the inquiry and response of the authentication result in step S705 in the flowchart of FIG. It is a flowchart showing the procedure of the 1st modification of the operation control process of CPU9 for image processing by this invention. In the flowchart of FIG. 10, it is a figure explaining the detail of the inquiry of an authentication result of step S1005, and a response. It is a flowchart showing the procedure of the 2nd modification of the starting control processing of CPU9 for image processing by this invention. FIG. 13 is a diagram for explaining the details of the inquiry and response of the authentication result in step S1204 in the flowchart of FIG.

  Hereinafter, an embodiment of a gaming machine control board, a chip, and a related method according to the present invention will be described with reference to FIGS. However, the configuration of the gaming machine control board, the chip, and the related method according to the present invention is not limited to the specific specific configuration shown in each drawing, and can be appropriately changed within the scope of the present invention. It is. For example, in the following description, the gaming machine control board according to the present invention is described as being an image control sub-board, but the gaming machine control board according to the present invention can be operated by mounting a memory unit such as a voice control sub-board. Any substrate can be used. In the following description, a pachinko machine will be described as an example of the gaming machine, but the gaming machine control board, chip, and related method according to the present invention control any other gaming machine (pachinko, pachislot, etc.). Can be used for Further, in the figure, the image processing CPU and the cryptographic communication unit are depicted as separate chips, but the functions of both may be performed by a single chip. The processing shown in the flowchart of FIG. 7 and the like is not limited to when the gaming machine is activated or restored, and may be performed at an arbitrary timing.

  FIG. 1 is a block diagram showing a schematic configuration of a pachinko machine including a main board 1 and an image control sub-board 2 which is an embodiment of a gaming machine control board according to the present invention (board storage member). Various display lamps, various mechanisms for ball discharge operation, operation buttons, etc. are omitted.) When the winning sensor 4 detects that a ball has entered the winning slot 3 of the pachinko machine after the game starts, a signal instructing the lottery start from the winning sensor 4 to the main CPU 6 mounted on the main board 1 is input / output circuit. 5 is sent through. A ROM built in the main CPU 6 stores a control program for game machine operation, and lottery is performed according to this control program. If the main CPU 6 determines that the game play has entered a winning state by lottery, an instruction for displaying a winning image to the player is sent to the image processing CPU 9 of the image control sub-board 2 via the encryption communication units 7 and 8. Sent to. The control signal responsible for this command is transmitted from the encryption communication unit 7 to the encryption communication unit 8 in a state encrypted with a common key or the like stored in advance in the encryption communication units 7 and 8, and the encryption communication unit 8 After decoding, it is transmitted to the image processing CPU 9. The image processing CPU 9 typically uses a graphics LSI (Large Scale Integration) while using data such as an image control program stored in the memory unit 10 mounted on the image control sub-board 2 as an external memory. (GPU) 11, picture image data ROM 12, DRAM (Dynamic Random Access Memory) 13 are used to display a winning picture image on a liquid crystal display (LCD) 14 mounted on the gaming machine.

  FIG. 2 is a block diagram showing the internal configuration of the main CPU 6 and the encryption communication unit 7. As shown in the figure, a watchdog timer circuit, an illegal address execution prohibition circuit, a timer circuit, and a security check circuit are connected to the CPU bus inside the main CPU 6, and are also connected to the bus. Various operations are performed while reading data stored in the memory, boot ROM, boot RAM, user ROM, and user RAM, or writing data to these memories. The watchdog timer circuit forcibly resets the CPU when the timer circuit is not reset for a certain period of time. The illegal address execution prohibition circuit forcibly resets the CPU to prevent the gaming machine from operating with data read from an illegal address due to malfunction caused by ESD or noise. The timer circuit is a circuit for controlling the operation of the gaming machine control CPU at a specific timing, for example, notifying the gaming machine control CPU of the opening / closing timing of the winning sensor. The security check circuit checks at an arbitrary timing whether or not the data stored in each memory is illegal, and if it is illegal, performs an operation such as outputting a signal to that effect. The shared memory is a memory used when performing communication with another board such as the image control sub-board 2 via the encryption communication unit 7.

  FIG. 3 is a block diagram showing the configuration of the image processing CPU 9. The configuration of the image processing CPU 9 is almost the same as that of the main CPU 6. As described above, the image processing CPU 9 receives a picture image display command corresponding to the pachinko machine from the main board 1 via the encryption communication unit 8, and the image control program stored in the memory unit 10 performs image processing. While using the data in the data memory 12, a picture image corresponding to the state of the pachinko machine at that time is displayed on the LCD 14 by a device such as a graphics LSI (GPU) 11 and a DRAM 13.

  FIG. 4 is a block diagram showing a configuration of the cryptographic communication unit 7 mounted on the main board 1. In addition to the CPU, RAM, and ROM, the encryption communication unit 7 includes a communication control circuit, a transmission / reception circuit, a communication result storage circuit, an encryption / decryption circuit, a random number generation circuit, a random value storage circuit, an encryption key storage circuit, and a communication monitor. A timer and shared memory are included.

  The communication control circuit controls a communication sequence (protocol) by a communication control program stored in the ROM. The transmission / reception circuit is a circuit that transmits / receives data to / from another board such as the image control sub-board 2 and receives the clock signal from the clock circuit and monitors the data, and detects a framing error, a parity error, and the like. . The communication result storage circuit is a circuit for storing a communication state (line connection, line disconnection, game machine operation, error occurrence number, etc.). The encryption / decryption circuit encrypts and decrypts communication data. The random number generation circuit generates a random number used for generating an encryption key and spreading communication data. The random value storage circuit stores a random value sent from a chip on a substrate to be communicated, a random value generated by the own chip, and the like. The encryption key storage circuit stores the encryption common key calculated from the chip on the communication target substrate and the data of the own chip. The communication monitoring timer monitors the response data time during communication and the transmission data transmission time. The shared memory is used for data transfer from the main CPU 6 to the encryption communication unit 8.

  FIG. 5 is a block diagram showing the configuration of the encryption communication unit 8 mounted on the image control sub-board 2. The encryption communication unit 8 includes the communication control circuit, the transmission / reception circuit-1, the communication result storage circuit, the encryption / decryption circuit, the random number generation circuit, the random number storage circuit, the encryption key storage circuit, the communication monitoring timer, and the shared memory. In addition, an input / output circuit that outputs a stop signal for stopping the image processing CPU 9, a memory unit authentication transmission / reception circuit-2, and a mutual authentication information storage circuit are included.

  The input / output circuit that transmits the image processing CPU stop signal is notified of an authentication result indicating that the memory unit 10 is genuine from the memory unit 10 when the gaming machine is started or restored. In the meantime, the signal is continuously sent to the reset circuit of the image processing CPU 9 to stop the operation of the image processing CPU 9 so that the verification operation in the memory unit 10 can be performed quickly. The transmission / reception circuit-2 makes an inquiry about the memory unit authentication result to the memory unit 10 at an arbitrary timing (the communication control circuit that receives the clock signal from the clock circuit of the image processing CPU 9 controls the inquiry timing). Typically, an inquiry is made at regular intervals.) In addition, an authentication result or a signal indicating that the authentication is not yet completed is received from the memory unit 10 (the encryption communication unit 8 itself is a memory unit). When the authentication of 10 is performed, the memory unit authentication data is requested and received.) The mutual authentication described above is also performed prior to the request. The mutual authentication information storage circuit is used for mutual authentication by the cryptographic communication unit 8 to authenticate each other with the memory unit 10. This stores the code that represents the product model of the unit.

  FIG. 6 is a block diagram showing the configuration of the memory unit 10 mounted on the image control sub-board 2. The memory unit 10 includes a memory unit authentication CPU, a transmission / reception circuit, an authentication program storage memory, and the like in the CPU chip. In addition, an image control program ROM (memory) and image processing A bus switching circuit for arbitrating access to the image control program memory between the CPU 9 for memory and the CPU for memory unit authentication is mounted.

  The memory unit authentication CPU executes the program stored in the authentication program storage memory (ROM) to thereby verify the validity of the image control program data stored in the image control program ROM (memory), for example, the image Authentication is performed by comparing the hash value of the area storing the control program data with the authentication data (the hash value of the image control program calculated in advance). At the time of initial authentication such as after power-on, the image processing CPU 9 is stopped by reset by the encryption communication unit, so that the memory switching CPU can be switched to the memory unit authentication CPU without any problem and high speed. It is possible to authenticate the validity of the image control program data. The transmission / reception circuit receives an inquiry of the authentication result from the encryption communication unit 8 (or a request for authentication data from the encryption communication unit 8), and responds to the encryption communication unit 8 (the authentication result or authentication is not completed). In the case where the cryptographic communication unit 8 itself authenticates the memory unit 10, the above-mentioned mutual authentication performed prior to such bidirectional communication is also performed. The image control program ROM stores image control data such as an image control program in the overwriting prohibited area. The mutual authentication information storage circuit stores mutual authentication information (a product model of the memory unit 10 or a code representing a product model of a compatible game machine or the like). Note that the authentication program storage memory stores, for example, image control program data that has not been tampered with in the overwriting prohibited area for storing the image control program data in the image control program ROM. ID for authentication given as a hash value at a certain time) is stored. The authentication program storage memory stores a program for the above-mentioned authentication by the memory unit authentication CPU and a program for performing mutual authentication prior to the authentication. Encryption communication with the encryption communication unit 8 is performed by the encryption / decryption circuit and the transmission / reception circuit using the encryption key stored in the encryption key storage circuit, the random value stored in the random value storage circuit, and the like. Each of the CPUs and cryptographic communication units shown in FIGS. 2 to 5 performs various processes mainly by ASIC (Application Specific Integrated Circuit), whereas the memory unit 10 performs the above-described authentication. The processing is mainly performed by the CPU for memory unit authentication by executing the program stored in the authentication program storage memory. However, this is not an essential aspect of the present invention. Various processing is performed by the ASIC or the CPU. It is optional whether to execute the program stored in the ROM.

  Hereinafter, the operation control processing of the image processing CPU 9 performed when the gaming machine shown in FIG. 1 is activated or restored will be described with reference to the flowchart of FIG.

  When the gaming machine is turned on, or when the gaming machine recovers from a failure or the like, first, the input / output circuit of the cryptographic communication unit 8 (FIG. 5) is included in the input / output circuit for the reset circuit of the image processing CPU 9. Then, transmission of a reset signal via the parallel port or the like is started (S701). While the reset signal is being transmitted, the CPU continues to be reset from the reset circuit in the image processing CPU 9 (FIG. 3), so that the operation of the CPU remains stopped and the image processing CPU 9 cannot operate.

  Next, the memory unit 10 authenticates the image control program ROM (FIG. 6) (S702). Note that this authentication is different from the order shown in FIG. 7, at the same time as the mutual authentication (S 703) between the cryptographic communication unit 8 and the memory unit 10 and the inquiry and response (S 705) of the authentication result between them, or You may start after either. This is because, even if an authentication result inquiry is received from the cryptographic communication unit 8 in a state where the authentication in step S702 has not been completed, the memory unit 10 may respond with “WAIT” as described later.

  In this embodiment, the memory unit 10 stores an authentication ID given as a hash value at the time of manufacture of the overwriting prohibited area for storing the image control program in the image control program ROM. The memory unit 10 can recalculate the hash value of the overwriting prohibited area and perform authentication based on whether or not it matches the authentication ID. In this case, if the authentication ID matches the hash value, it is determined that the memory unit 10 is authentic, and if it does not match, the memory unit 10 is determined not to be authentic. However, the authentication of the image control program ROM by the memory unit 10 may be performed by, for example, comparing the value of the specific address range of the overwriting prohibited area with the authentication ID stored as the value of the address range at the time of manufacture. Any method can be used.

  Next, prior to inquiring and responding to the authentication result, the cryptographic communication unit 8 and the memory unit 10 perform mutual authentication to confirm that each other is a valid communication destination (S703).

  FIG. 8 is a diagram for explaining encryption in the case of performing communication for exchanging mutual mutual authentication data at the time of mutual authentication in step S703. A common default common key k0 is assigned to the cryptographic communication unit 8 and the memory unit 10 in advance, and the cryptographic key storage circuit of the cryptographic communication unit 8 (FIG. 5) and the cryptographic key storage circuit of the memory unit 10 (FIG. 6). ) Respectively. In the mutual authentication between the cryptographic communication unit 8 and the memory unit 10, the mutual authentication data of the cryptographic communication unit 8 using the common key k0 (product model of the cryptographic communication unit 8, compatible game machines, memory units, etc.) The code etc. which represent the product model etc. of FIG.8 The transmission data which consists of Spe.Code (8)) and transmission random number Rx (it is stored in the random-value storage circuit in the encryption communication unit 8) in FIG. This is transmitted to the memory unit 10 from the transmission / reception circuit-2 (FIG. 5). Similarly, the memory unit 10 uses the common key k0 to store mutual authentication data of the memory unit 10 (in FIG. 6, the mutual authentication information storage circuit stores the product model of the memory unit 10 and compatible game machines, A code representing the product model of the encryption communication unit, etc. In FIG. 8, the transmission data composed of Spe.Code (10)) and transmission random number Rx (in FIG. 6, random value storage circuit) is encrypted, and this is encrypted. It transmits to the communication unit 8 from a transmission / reception circuit (FIG. 6).

  Each of the encryption communication unit 8 and the memory unit 10 decrypts the data received from the other party with the common key k0 and checks the validity of the obtained mutual authentication data. As an example, the cryptographic communication unit 8 includes cryptographic product communication, which is indicated by the mutual authentication data obtained by the decryption, the product model of the gaming machine that the memory unit 10 can handle, and the mutual authentication data of the cryptographic communication unit 8. The product models of the gaming machines that can be handled by the unit 8 are compared, and if they match, it is determined that the memory unit 10 is a valid communication partner. The memory unit 10 performs the same check.

  As a result of the mutual authentication, when it is determined that the encryption communication unit 8 and the memory unit 10 are valid communication partners (the result of S704 is “YES”), an authentication result inquiry by the encryption communication unit 8 and A response is made by the memory unit 10 (S705). Note that if it is determined that mutual communication is not a valid communication partner for the encryption communication unit 8 and the memory unit 10 as a result of mutual authentication (the result of S704 is “NO”), the activation control process ends. In this case, since the reset signal is continuously transmitted from the encryption communication unit 8 to the image processing CPU 9, the image processing CPU 9 cannot be activated.

  The inquiry and response of the authentication result performed in step S705 are also performed by encrypted communication in the same manner as the mutual authentication in step S703 (FIG. 9). When the mutual authentication is completed, the encryption communication unit 8 and the memory unit 10 have mutual and mutual authentication data (Spe. Code (8), Spe. Code (10)). Each of the encryption communication unit 8 and the memory unit 10 performs an operation of k1 = fk (Spe. Code (8), Spe. Code (10)) from the two mutual authentication data by a predetermined function fk, and newly A common key k1 is generated. The communication performed in step S705 is performed as encrypted communication in which data encrypted with the common key k1 is transmitted / received (in the embodiment in which mutual authentication is not performed, the common key k1 is previously stored in the encryption communication unit 8 and the memory). It may be stored in the unit 10).

  The encryption communication unit 8 encrypts the inquiry (ASK) of the authentication result with the common key k1 in the encryption / decryption circuit, and transmits it from the transmission / reception circuit-2 to the memory unit 10. The memory unit 10 decrypts the received data with the common key k1, and responds to the obtained ASK signal.

  The content of the response differs depending on whether the memory unit authentication process in step S702 is completed in the memory unit 10 and if it is completed. If the memory unit authentication process has not been completed, the response content from the memory unit 10 is WAIT, and if it is determined that the memory unit 10 is genuine, the response content is OK. If it is determined that it is complete and the memory unit 10 is not legitimate, the response content is NG. The memory unit encrypts a signal representing one of the response contents with the common key k1, and transmits the encrypted signal from the transmission / reception circuit to the encryption communication unit 8.

  The encryption communication unit 8 receives the response signal encrypted by the transmission / reception circuit-2 and decrypts it with the common key k1. If the response content is WAIT, the encryption communication unit 8 waits for a predetermined time under the control of the communication monitoring timer (FIG. 5), encrypts the ASK signal again with the common key k1, and then re-encrypts the memory unit 10 Send to. In this way, the cryptographic communication unit 8 typically repeats the inquiry at regular intervals until an OK or NG response is obtained.

  When an OK response is obtained (the result of S706 is “YES”), the input / output circuit of the cryptographic communication unit 8 stops transmitting the reset signal (S707). As a result, the image processing CPU 9 is not reset from the reset circuit, and the image processing CPU 9 is activated. When an NG response is obtained (the result of S706 is “NO”), the operation control process ends. In this case, since the reset signal is continuously transmitted from the encryption communication unit 8 to the image processing CPU 9, the image processing CPU 9 cannot be activated.

  The example of the activation control of the image processing CPU 9 performed according to the present invention has been described above, but the activation control can be performed in a different manner. As an example, FIG. 10 shows a modification of the operation control process flow shown in FIG. Hereinafter, activation control according to this modification will be described.

  When the gaming machine is turned on or when the gaming machine recovers from a failure or the like, the cryptographic communication unit 8 receives control information from the main board 1 by the transmission / reception circuit-1 (FIG. 5) (S1000). This control information is transmitted in one-way communication from the encryption communication unit 7 of the main board 1 to the encryption communication unit 8 of the image control sub-board 2 when the gaming machine is started, restored, or in operation. It may be a control command (for example, a command for instructing the image processing board CPU 9 to perform initial setting, or a command for instructing other arbitrary operations). In the present embodiment, it is assumed that the control information includes first gaming machine identification data (product model code or the like) for identifying the gaming machine corresponding to the main board 1. The encryption communication unit 8 receives this in an encrypted state (in one example, the encryption key storage circuit of the encryption communication units 7 and 8 stores the common key k2 in advance, and the encryption communication is performed using this. The first game machine identification data obtained by the decryption is temporarily stored in the RAM (FIG. 5) or the like.

  In the gaming machine shown in FIG. 1, control signals are transmitted from the main board 1 to the image control sub-board 2 at various timings, and step S1000 is also an arbitrary order different from the order shown in the flowchart of FIG. It is possible to execute at the timing.

  The process of FIG. 10, step S1001-S1005 is the same as the process of step S701-S705 in FIG. However, the OK or NG response from the memory unit 10 to the inquiry from the encryption communication unit 8 (step S1005) includes the second gaming machine identification data for identifying the gaming machine corresponding to the memory unit 10. (FIG. 11). The OK or NG response and the second gaming machine identification data are both encrypted with the common key k1 and transmitted to the encryption communication unit 8.

  The encryption communication unit 8 receives the response signal encrypted by the transmission / reception circuit-2 and decrypts it with the common key k1. If the response content is WAIT, the encryption communication unit 8 waits for a predetermined time under the control of the communication monitoring timer (FIG. 5), encrypts the ASK signal again with the common key k1, and then re-encrypts the memory unit 10 Send to. The encryption communication unit 8 typically repeats the inquiry at regular intervals until an OK or NG response is obtained.

  When an OK response is obtained (the result of S1006 is “YES”), the cryptographic communication unit 8 is further transmitted together with the first game machine identification data stored in the RAM and the OK response. The second game machine identification data is compared. If the gaming machines identified by both data are the same (the result of S1007 is “YES”), the input / output circuit of the cryptographic communication unit 8 stops transmitting the reset signal. As a result, the image processing CPU 9 is not reset from the reset circuit and the image processing CPU 9 is activated. When an NG response is obtained (the result of S1006 is “NO”), or an OK response is obtained, but the gaming machines identified by the first and second gaming machine identification data are not the same. In the case (the result of S1007 is “NO”), the operation control process ends. In this case, since the reset signal is continuously transmitted from the encryption communication unit 8 to the image processing CPU 9, the image processing CPU 9 cannot be activated.

  According to the above aspect, the startup control processing is completed in a state where the image control sub-board 2 is replaced with another game machine product sub-board that does not correspond to the main board 1, and then the original control unit has a tampered memory unit. It is possible to prevent an illegal act of playing a game by changing to a sub board for a gaming machine product.

  In the operation control of the image processing CPU 9 performed according to the present invention, the memory unit authentication data stored in the memory unit 10 is transmitted to the encryption communication unit 8, and then the authentication of the memory unit 10 is performed by the encryption communication unit 8. It is also possible to do this. An example of such an embodiment will be described according to the flow of FIG.

  When the gaming machine is turned on or when the gaming machine recovers from a failure or the like, first, the input / output circuit (FIG. 5) of the cryptographic communication unit 8 is connected via a parallel port or the like to the reset circuit of the image processing CPU 9. Transmission of the reset signal is started (S1201). While the reset signal is being transmitted, the CPU continues to be reset from the reset circuit in the image processing CPU 9 (FIG. 3), so that the operation of the CPU remains stopped and the image processing CPU 9 cannot be activated.

  Next, the encryption communication unit 8 and the memory unit 10 perform mutual authentication in order to confirm that they are valid communication destinations before inquiring and responding to memory unit authentication data (S1202). This mutual authentication may be the same as that performed in step S703 (FIG. 8) in the flow of FIG.

  As a result of the mutual authentication, when it is determined that the encryption communication unit 8 and the memory unit 10 are valid communication partners (the result of S1203 is “YES”), the encryption communication unit 8 continues to query authentication data. Then, a response is made by the memory unit 10 (S1204). Note that, as a result of mutual authentication, if it is not determined that the encryption communication unit 8 and the memory unit 10 are valid communication partners (the result of S1203 is “NO”), the operation control process ends. In this case, since the reset signal is continuously transmitted from the encryption communication unit 8 to the image processing CPU 9, the image processing CPU 9 cannot be activated.

  The inquiry and response for the authentication data performed in step S1204 are also performed by encrypted communication in the same manner as the mutual authentication in step S1202 (FIG. 13). When the mutual authentication is completed, the encryption communication unit 8 and the memory unit 10 have mutual and mutual authentication data (Spe. Code (8), Spe. Code (10)). Each of the encryption communication unit 8 and the memory unit 10 performs an operation of k1 = fk (Spe. Code (8), Spe. Code (10)) from the two mutual authentication data by a predetermined function fk, and newly A common key k1 is generated. The communication performed in step S1204 is performed as encrypted communication in which data encrypted with the common key k1 is transmitted and received (in an embodiment in which mutual authentication is not performed, the common key k1 is preliminarily stored in the encryption communication unit 8 and the memory. It may be stored in the unit 10).

  The encryption communication unit 8 encrypts the inquiry for authentication data (ASK) with the common key k1 in the encryption / decryption circuit, and transmits it from the transmission / reception circuit-2 to the memory unit 10. The memory unit 10 decrypts the received data with the common key k1, and, as a response to the obtained ASK signal, encrypts the memory unit authentication data with the common key k1, and then transmits the data from the transmission / reception circuit to the encryption communication unit 8. Send.

  The encryption communication unit 8 receives the response signal encrypted by the transmission / reception circuit-2 and decrypts it with the common key k1. Further, the encryption communication unit performs authentication processing of the memory unit 10 using the memory unit authentication data obtained for the decryption. Any authentication process may be used. In a simple example, authentication processing is performed depending on whether or not the received memory unit authentication data matches arbitrary data predetermined in an authentication ID storage circuit (not shown) of the encryption communication unit 8. Can do.

  As a result of authentication, when it is determined that the memory unit 10 is authentic (the result of S1205 is “YES”), the input / output circuit of the cryptographic communication unit 8 stops transmitting the reset signal. As a result, the image processing CPU 9 is not reset from the reset circuit to the gaming machine control CPU, and the image processing CPU 9 is activated. When an NG response is obtained (the result of S1205 is “NO”), the operation control process ends. In this case, since the reset signal is continuously transmitted from the encryption communication unit 8 to the image processing CPU 9, the image processing CPU 9 cannot be activated.

  In the third embodiment, similarly to the second embodiment, using the first and second gaming machine identification data, the gaming machine corresponding to the main board 1 and the memory unit 10 of the image control sub-board 2 are used. Can be set as a condition for starting up the image processing CPU 9. In the flow of FIG. 10, the process of step S1000 is performed at an arbitrary timing in the flow of FIG. 12, and in the flow of FIG. 12, the second game machine identification data is added to the response transmitted from the memory unit 10 in step S1204. In the flow of FIG. 10, the process of step S1007 is also performed in the flow of FIG. 12, and the reset signal is transmitted only when the first and second gaming machine identification data indicate the same gaming machine. By stopping, Example 2 and 3 can be implemented in combination. In addition, the present invention can be implemented by arbitrarily combining individual configurations and modes described in different embodiments.

  The present invention can be used to control activation of an arbitrary gaming machine such as an ART machine. If an illegal act of operating a gaming machine using an illegally tampered external memory or the like is prevented according to the present invention, fairness among players is ensured and the reliability of the entire gaming machine industry is improved.

DESCRIPTION OF SYMBOLS 1 Main board | substrate 2 Sub board | substrate 3 for image control Winning slot 4 Winning sensor 5 Input / output circuit 6 Main CPU (main chip)
7 Cryptographic Communication Unit 8 Cryptographic Communication Unit 9 Image Processing CPU (Image Processing Chip)
10 Memory unit 11 Graphics LSI
12 Pattern image data ROM
13 DRAM
14 LCD

Claims (14)

A gaming machine control board that controls display of a picture by liquid crystal of a gaming machine based on a control signal transmitted from a main board,
An encrypted communication unit that receives and decrypts the control signal in an encrypted state from the main board;
A central processing unit for controlling the picture display of the gaming machine based on the decoded control signal;
A memory unit for storing display operation control data used for controlling the display of the picture of the gaming machine by the central processing unit;
The memory unit further stores memory unit authentication data for authenticating the memory unit, authenticates whether the memory unit is legitimate using the memory unit authentication data, and Configured to notify the encryption communication unit of the memory unit authentication result in response to the inquiry from
The cryptographic communication unit can operate the central processing unit only when the cryptographic communication unit is notified from the memory unit of a memory unit authentication result indicating that the memory unit is authentic. Configured to control the operation of the central processing unit,
The control signal transmitted from the main board to the gaming machine control board includes first gaming machine identification data for identifying a gaming machine corresponding to the main board,
The memory unit authentication result notified from the memory unit to the encryption communication unit includes second gaming machine identification data for identifying a gaming machine corresponding to the memory unit,
The encrypted communication unit is a case where the encrypted communication unit is notified from the memory unit of a memory unit authentication result indicating that the memory unit is authentic, and the first and second games. The game is configured to control the central processing unit so that the central processing unit can be operated only when the gaming machines identified by the machine identification data are the same. Machine control board. Control of the operation of the central processing unit by the cryptographic communication unit is as follows:
While sending a reset signal to the central processing unit, query the memory unit authentication result to the memory unit,
The memory unit authentication result indicating that the memory unit is genuine is performed by stopping transmission of the reset signal in response to the notification from the memory unit. The gaming machine control board according to 1.   The inquiry from the encryption communication unit to the memory unit and the notification from the memory unit to the encryption communication unit performed in response to the inquiry are performed by transmission / reception of a signal encrypted using an encryption key. The gaming machine control board according to claim 1 or 2, characterized in that   The cryptographic communication unit and the memory unit further store mutual authentication data for authenticating each other, and the inquiry from the cryptographic communication unit and the notification of the memory unit authentication result from the memory unit are: The game according to any one of claims 1 to 3, wherein the game is performed after mutual authentication between the encryption communication unit and the memory unit is confirmed as a valid communication partner. Machine control board. Authentication of the memory unit by the memory unit as to whether it is legitimate, inquiry of the memory unit authentication result by the encryption communication unit, the notification of the memory unit authentication result in response to the inquiry, and the encryption communication unit the control of the operation of the central processing unit by, after power-on of the gaming machine, and characterized in that it is configured to run every time before execution of the game operation, according to any one of claims 1 to 4 Game machine control board. The gaming machine control board according to any one of claims 1 to 5 , wherein the cryptographic communication unit and the central processing unit are stored in one chip . A gaming machine control chip that can be mounted on a gaming machine control board that controls picture display by liquid crystal of the gaming machine based on a control signal transmitted from the main board,
The control signal in the encrypted state is received from the main board and decrypted, and the decrypted control signal is transmitted to a central processing unit mounted on the gaming machine control board, thereby controlling the gaming machine While operating as a board encryption communication unit,
The memory unit mounted on the gaming machine control board is inquired about an authentication result as to whether or not the memory unit is authorized, and an authentication result indicating that the memory unit is authorized is used for controlling the gaming machine. Configured to control the operation of the central processing unit to enable the central processing unit to operate only when a chip is notified from the memory unit;
The control signal transmitted from the main board to the gaming machine control board includes first gaming machine identification data for identifying a gaming machine corresponding to the main board,
The authentication result notified from the memory unit to the gaming machine control chip includes second gaming machine identification data for identifying a gaming machine corresponding to the memory unit,
The gaming machine control chip is a case where the gaming machine control chip is notified from the memory unit of a memory unit authentication result indicating that the memory unit is genuine, and the first and second The central processing unit is controlled so that the central processing unit can be operated only when the gaming machines identified by the gaming machine identification data are the same. , Chip for gaming machine control. The gaming machine control chip according to claim 7 , wherein the gaming machine control chip is configured as a chip integrated with the central processing unit. A method for controlling the operation of a central processing unit mounted on a gaming machine control board for controlling picture display by liquid crystal of a gaming machine based on a control signal transmitted from a main board,
A memory unit mounted on the gaming machine control board for storing display operation control data used to control a picture display by liquid crystal of the gaming machine by the central processing unit is stored in the memory unit. Using the memory unit authentication data for authenticating the unit, authenticate whether or not the memory unit is authentic,
In response to an inquiry from the encryption communication unit mounted on the gaming machine control board that receives and decrypts the control signal in an encrypted state from the main board, the memory unit receives a memory unit authentication result To the cryptographic communication unit,
The cryptographic communication unit can operate the central processing unit only when the cryptographic communication unit is notified of a memory unit authentication result indicating that the memory unit is authentic by the memory unit. Control the operation of the central processing unit ,
The control signal transmitted from the main board to the gaming machine control board includes first gaming machine identification data for identifying a gaming machine corresponding to the main board,
The memory unit authentication result notified from the memory unit to the encryption communication unit includes second gaming machine identification data for identifying a gaming machine corresponding to the memory unit,
The control of the operation of the central processing unit by the cryptographic communication unit is when the memory unit authentication result indicating that the memory unit is authentic is notified from the memory unit to the cryptographic communication unit, and The operation control is performed to enable the central processing unit only when the gaming machines identified by the first and second gaming machine identification data are the same. Features, a method. Control of the operation of the central processing unit by the cryptographic communication unit is as follows:
While sending a reset signal to the central processing unit, query the memory unit authentication result to the memory unit,
The memory unit authentication result indicating that the memory unit is genuine is performed by stopping transmission of the reset signal in response to the notification from the memory unit. 9. The method according to 9 . The inquiry from the encryption communication unit to the memory unit and the notification from the memory unit to the encryption communication unit performed in response to the inquiry are performed by transmission / reception of a signal encrypted using an encryption key. The method according to claim 9 or 10 , characterized in that: The cryptographic communication unit and the memory unit further store mutual authentication data for authenticating each other, and the inquiry from the cryptographic communication unit and the notification of the memory unit authentication result from the memory unit are: The method according to any one of claims 9 to 11 , wherein the method is performed after mutual authentication between the cryptographic communication unit and the memory unit is confirmed to be a valid communication partner. . Authentication of the memory unit by the memory unit as to whether it is legitimate, inquiry of the memory unit authentication result by the encryption communication unit, the notification of the memory unit authentication result in response to the inquiry, and the encryption communication unit The method according to any one of claims 9 to 12 , wherein the control of the operation of the central processing unit is performed each time after the gaming machine is turned on and before the execution of the game operation. The method according to any one of claims 9 to 13 , wherein the cryptographic communication unit and the central processing unit are stored in one chip .

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