JP4554660B2 - Storage processing device, information providing server, operation method, and program - Google Patents

Description

  The present invention relates to a storage processing device, an information providing server, an operation method, and a program to be realized on a computer that suppress unauthorized rewriting of data.

  Conventionally, in game devices, the state of a game is expressed using various numerical parameters. There are various numerical parameters such as various ability values such as the physical strength and level of the character operated by the player, the number of cleared faces, and past score history. The numerical parameter is typically recorded on a non-volatile storage medium locally owned by the user's game device, such as a memory card or a hard disk. Thus, the form of storing numerical parameters in the external memory is widely adopted in network battle games.

On the other hand, fraudulent acts (cheat acts) that frequently modify numerical parameters in an advantageous manner are carried out. Unauthorized rewriting of numerical parameters is a problem particularly in a network game where a plurality of users battle each other. A numerical value recording apparatus for detecting such an illegal act is disclosed in Patent Document 1, for example.
JP 2006-72825 A

According to the technique described in Patent Document 1, a float type numerical value to be saved is promoted to a double type (upcast) and stored in an external memory. When loading, double type demotion conversion (downcast) is performed on the double type numerical value read from the external memory. Then, double-type value of having the same exponent as compared to the float-number, by utilizing the fact that with a redundancy of 2 ^29, and a value obtained by converting demoted converted results further promoted, from the external storage Compare the read results, and if they differ, report that there was fraud.

  This method is effective in detecting fraud because it is checked whether or not it is fraudulent at all loads, but the calculation load increases. On the other hand, there is a demand for a method of suppressing fraud without applying a calculation load in an environment where calculation resources are limited, such as a game machine.

  The present invention is to solve the above-described problems, and provides a storage processing device, an information providing server, an operation method, and a program to be realized on a computer that suppress unauthorized rewriting of data. With the goal.

  In order to achieve the above object, a storage processing device according to a first aspect of the present invention includes a parameter storage unit, a table storage unit, an address acquisition unit, a read / write unit, and an update unit.

  The parameter storage unit stores a parameter group. As will be described later, a non-volatile storage medium such as a memory card is assumed as the parameter storage unit, and various play states of the game are stored. For example, various information such as ability values such as the level of each character operated by the player, held money and items, and a cleared stage are stored as parameters. That is, once it is ascertained which parameter is stored at which address, fraud can be easily performed by rewriting the data at that address. For example, if the level of a character is rewritten illegally, a character having a high level can be instantaneously obtained without gaining experience.

  The table storage unit stores an address conversion table that associates a real address in the parameter storage unit in which each parameter of the parameter group is stored with a virtual address that is designated to access the parameter.

  That is, in the present embodiment, in order to prevent a misbehavior from easily estimating where the parameter is stored on the memory card, a virtual address designated to access the parameter storage unit and The actual address at which the parameter is stored in the parameter storage unit is different. The association between the virtual address and the real address is stored in an address conversion table stored in the table storage unit.

  The parameter storage unit is managed in 1-byte units, and a virtual address for accessing data in the parameter storage unit can be specified in byte units. The table storage unit stores the real address in association with each virtual address.

  The address acquisition unit receives the designated virtual address as an input, refers to the address conversion table, and acquires the real address of the parameter storage unit. That is, the address acquisition unit acquires different real addresses for the same virtual address when the address conversion tables are different.

  When the read / write unit receives a read / write request for the specified virtual address, the read / write unit controls the address acquisition unit to acquire a real address corresponding to the virtual address, and for the acquired real address of the parameter storage unit Read and write.

  That is, the reading / writing unit is responsible for the actual reading / writing of the parameter storage unit in the process of saving or loading the game state in the parameter storage unit which is a nonvolatile storage medium. In these save and load processes, an access request specifying a virtual address is issued to the read / write unit. The read / write unit actually reads and writes the real address associated with the designated virtual address.

  The update unit updates the address conversion table at a predetermined timing, and when each virtual address is specified, the data stored in the real address obtained by referring to the address conversion table before update and the address after update The data stored in the real address is updated so that the data stored in the real address obtained by referring to the conversion table matches.

  That is, when the address conversion table is updated by the update unit, the actual address that the read / write unit actually accesses is different even if the same virtual address is accessed. If the actual address in the parameter storage unit where the parameters are stored is changed at a predetermined timing, it is difficult to estimate which parameter is stored in which actual address, and it is difficult to rewrite data illegally. Become. However, in order to maintain the consistency of data, when accessing the same virtual address, the update unit is a parameter storage unit so that the same data can be obtained before and after updating the address conversion table. Replace the data.

  As described above, the storage processing device according to the present invention can prevent the unauthorized person from easily grasping the position of each data stored in the parameter storage unit by performing the address conversion process at the time of data access. It is. Further, the address conversion table is updated at a predetermined timing so that it is not easily grasped by an unauthorized person.

  The updating unit may update the address conversion table by randomly changing the association between the real address and the virtual address at a predetermined timing. That is, the update unit may generate the address conversion table by itself.

  The storage processing device may be connected to the information providing server via a network, and the receiving unit may further include a table receiving unit that receives the address conversion table from the information providing server. That is, assuming that the storage processing apparatus is connected to a game machine or the like that can be connected to the network, the address conversion table may be received from the information providing server connected via the network.

  The updating unit may update the address conversion table with the received address conversion table. That is, the update unit saves the address conversion table transmitted from the information providing server in the table storage unit, and creates a new address conversion table.

  The storage processing device may further include a reply unit. When the updating unit updates the address conversion table and the data stored in the real address, the reply unit identifies itself from the address conversion table stored in the table storage unit immediately before the update. The storage processing device identification information to be returned may be returned to the information providing server.

  Here, when the information providing server sends a new address conversion table to the storage processing device, the old address is sent from the storage processing device to determine whether the address conversion table has been illegally rewritten on the storage processing device side. Have the conversion table sent. Then, the information providing server compares the transmitted table with the address conversion table transmitted from the information providing server to the storage processing device, and determines that illegal writing has been performed if the two tables are different.

  At this time, the information providing server cannot compare with the address conversion table sent from the storage processing device unless it stores which address conversion table it sent to which storage processing device. Therefore, the information providing server stores the address conversion table and the identification information of the storage processing device that has transmitted the address conversion table in association with each other. Then, the return unit of the storage processing device can refer to the address conversion table and the storage processing for identifying itself so that the information providing server can refer to the conversion table transmitted to the storage processing device from the stored identification information of the storage processing device. The device identification information is transmitted to the information providing server.

  The reply unit may return, to the information providing server, a result of applying a predetermined hash function to the address conversion table stored in the table storage unit immediately before the update, instead of the address conversion table. . That is, when a new address conversion table is sent from the information providing server, the reply unit transmits a result of applying a predetermined hash function to the old address conversion table, not the old address conversion table itself. Then, the information providing server side determines whether the old address conversion table has been illegally rewritten by comparing the hash values.

  The table receiving unit further receives table identification information associated with the address conversion table from the information providing server, and the reply unit provides the received table identification information instead of the storage processing device identification information for identifying itself. You may make it reply to a server. That is, as described above, instead of managing which address conversion table is transmitted to which storage processing device on the information providing server side, which address conversion table is transmitted from the information providing server on the storage processing device side. You may manage.

  On the other hand, the information providing server side may store table identification information for identifying the table for a plurality of address conversion tables held. If the reply unit of the storage processing device transmits the address conversion table and the table identification information to the information providing server, the information providing server side determines which conversion table is transmitted to the storage processing device based on the table identification information. I can grasp. This enables the information providing server to compare the address conversion table transmitted to the storage processing device with the address conversion table transmitted from the storage processing device, and whether or not the address conversion table has been illegally rewritten. Can be determined.

  In the storage processing device, the parameter storage unit is a nonvolatile storage medium, and the table storage unit is a volatile storage medium. That is, as described above, the parameter storage unit is assumed to be a memory card or the like that is often used in games.

  On the other hand, when the information providing server provides the address conversion table, the storage processing device suffices to have the information providing server retransmit the address conversion table as necessary. Therefore, the table storage unit includes a volatile storage medium. Adopted.

  However, when the storage processing device creates its own address conversion table, it is necessary to recover the address conversion table before turning off the power when the power is turned on. Therefore, a nonvolatile storage medium such as a RAM is used as the table storage unit at the time of execution, and a nonvolatile storage medium such as a memory card is employed when the power is turned off.

  An information providing server according to another aspect of the present invention is an information providing server connected to a storage processing device via a network, and includes a candidate storage unit, a table transmission unit, a transmission information storage unit, and a reception unit. And a determination unit.

  Here, the candidate storage unit stores a plurality of address conversion tables associating the real addresses of the storage processing device with the virtual addresses designated for accessing each of the real addresses. That is, the information providing server stores a plurality of address conversion tables in the candidate storage unit in order to provide the above-described address conversion table to the storage processing device.

  The table transmission unit transmits the address conversion table to the storage processing device at a predetermined timing. As described above, the table transmission unit selects one address conversion table from the candidate storage units and transmits it to the storage processing device. The storage processing device side uses the transmitted address conversion table as a new address conversion table.

  The transmission information storage unit stores the address conversion table and storage processing device identification information for identifying the storage processing device that is the transmission destination of the address conversion table in association with each other.

  As mentioned when explaining the storage processing device, the information providing server transmits the address conversion table from the storage processing device in order to determine whether the address conversion table has been illegally rewritten on the storage processing device side. do that for me. The information providing server compares the transmitted table with the address conversion table transmitted from the information providing server to the storage processing device, and determines that illegal writing has been performed if the two tables differ. Accordingly, in order to store which address conversion table is transmitted to which storage processing device, the information providing server stores the address conversion table in the transmission information storage unit and the storage of the destination to which the address conversion table is transmitted. The identification information of the processing device is stored in association with each other.

  The receiving unit receives the address conversion table returned from the storage processing device and the storage processing device identification information for identifying the transmission source storage processing device. Then, the determination unit refers to the transmission information storage unit, acquires the address conversion table associated with the received storage processing device identification information, and compares the address conversion table with the received address conversion table. If both tables match, it is determined that the data has not been falsified, and if both tables do not match, it is determined that the data has been falsified.

  In other words, it is possible to detect an illegal act of rewriting data by replacing the original address conversion table with a table created by determining the rewriting of the address conversion table.

  The receiving unit may receive a result of applying a predetermined hash function to the address conversion table from the storage processing device instead of the address conversion table. That is, the receiving unit may receive a value obtained by applying a hash function to the address conversion table and identification information of the storage processing device from the storage processing device.

  The determination unit refers to the transmission information storage unit, acquires an address conversion table associated with the received storage processing device identification information, and applies a predetermined hash value function to the address conversion table. The received hash value may be compared, and if both match, it may be determined that the data has not been falsified, and if both do not match, it has been determined that the data has been falsified.

  That is, the address conversion table is compared by comparing the hash value received from the storage processing device with the result of applying the hash function to the address conversion table transmitted to the storage processing device without comparing the address conversion table itself. The presence or absence of fraud may be determined. Note that it is possible to reduce network traffic by transmitting a hash value instead of the table itself.

  Thus, by providing the address conversion table on the information providing server side, it is possible to detect fraud on the information providing server side even if the storage processing device side has illegally written to the address conversion table. .

  An information providing server according to another aspect of the present invention is an information providing server connected to a storage processing device via a network, and similar to the information providing server, a candidate storage unit, a table transmission unit, and a reception unit And a determination unit.

  The candidate storage unit stores a plurality of address conversion tables for associating the real addresses of the storage processing device with the virtual addresses designated for accessing each of the real addresses, and for each of the address conversion tables, the address conversion Table identification information for identifying a table is stored. The table transmission unit transmits the address conversion table and corresponding table identification information to the storage processing device at a predetermined timing.

  The receiving unit receives the address conversion table returned from the storage processing device and the corresponding table identification information. Then, the determination unit acquires an address conversion table corresponding to the table identification information from the candidate storage unit, compares the address conversion table with the received address conversion table, and if both tables match, the data If there is no falsification and the two do not match, it is determined that the data has been falsified.

  That is, the difference from the information providing server is that it does not have a transmission information storage unit. The information providing server includes table identification information for identifying each address conversion table, instead of storing which address conversion table is transmitted to which storage processing device. The table transmission unit transmits the table identification information together with the address conversion table to the storage processing device.

  On the other hand, the storage processing device side transmits identification information for identifying the address conversion table together with the address conversion table so that the information providing server side determines whether or not the address conversion table has been illegally rewritten. On the information providing server side, when the receiving unit receives this information, the determining unit acquires a correct address conversion table to be compared based on the table identification information, and determines the presence or absence of unauthorized writing.

  An operation method according to another aspect of the present invention is an operation method of a storage processing device including a parameter storage unit, a table storage unit, an address acquisition unit, a read / write unit, and an update unit. A process is provided.

In the parameter storage step, the parameter storage unit stores the parameter group.
In the table storage step, the table storage unit stores an address conversion table that associates a real address in the parameter storage unit in which each parameter of the parameter group is stored with a virtual address designated to access the parameter.
In the address acquisition step, the address acquisition unit receives the designated virtual address as input and refers to the address conversion table to acquire the real address of the parameter storage unit.

In the read / write process, when the read / write unit receives a read / write request for the designated virtual address, the read / write unit controls the address acquisition unit to acquire a real address corresponding to the virtual address of the parameter storage unit, and stores the parameter storage Read and write the acquired real address of the part.
In the update process, the update unit updates the address conversion table at a predetermined timing, and further, when each virtual address is designated, data stored in the real address obtained by referring to the address conversion table before the update, Then, the data stored in the real address is updated so that the data stored in the real address obtained by referring to the updated address conversion table matches.

  An operation method according to another aspect of the present invention is connected to a storage processing device via a network, including a candidate storage unit, a table transmission unit, a transmission information storage unit, a reception unit, and a determination unit. An information providing server operating method comprising the following steps.

In the candidate storage step, the candidate storage unit stores a plurality of address conversion tables for associating the real address of the storage processing device with the virtual address designated for accessing each real address.
In the table transmission step, the table transmission unit transmits the address conversion table to the storage processing device at a predetermined timing.
In the transmission information storage step, the transmission information storage unit stores the address conversion table and the storage processing device identification information for identifying the storage processing device that is the transmission destination of the address conversion table in association with each other.

In the receiving step, the receiving unit receives the address conversion table returned from the storage processing device and the storage processing device identification information for identifying the storage processing device of the transmission source.
In the determination step, the determination unit refers to the transmission information storage unit, acquires an address conversion table associated with the received storage processing device identification information, the address conversion table, the received address conversion table, If both tables match, it is determined that the data has not been falsified, and if both tables do not match, it is determined that the data has been falsified.

An operation method according to another aspect of the present invention is an operation method of an information providing server connected to a storage processing device via a network, including a candidate storage unit, a table transmission unit, a reception unit, and a determination unit. Because
The candidate storage unit stores a plurality of address conversion tables that associate a real address of the storage processing device with a virtual address designated for accessing each real address, and the address conversion is performed for each of the address conversion tables. A candidate storage step for storing table identification information for identifying a table;
A table transmission step in which the table transmission unit transmits the address conversion table and the corresponding table identification information to the storage processing device at a predetermined timing;
A receiving step in which the receiving unit receives the address conversion table returned from the storage processing device and the corresponding table identification information;
The determination unit acquires an address conversion table corresponding to the table identification information from the candidate storage unit, compares the address conversion table with the received address conversion table, and if both tables match, the data is falsified. And a determination step for determining that the data has been falsified if they do not match,
Comprising
It is characterized by that.

  A program according to another aspect of the present invention is configured to cause a computer to function as the above storage processing device and the above information providing server.

  The program of the present invention can be recorded on a computer-readable information recording medium such as a compact disk, flexible disk, hard disk, magneto-optical disk, digital video disk, magnetic tape, and semiconductor memory. The above program can be distributed and sold via a computer communication network independently of the computer on which the program is executed. The information recording medium can be distributed and sold independently of the computer.

  According to the present invention, it is possible to provide a storage processing device, an information providing server, an operation method, and a program that prevent unauthorized rewriting of data.

  Embodiments of the present invention will be described below. In the following, for ease of understanding, an embodiment in which the present invention is applied to a game device will be described. However, the present invention is similarly applied to information processing devices such as various computers, PDAs, and mobile phones. Can do. That is, the embodiment described below is for explanation, and does not limit the scope of the present invention. Accordingly, those skilled in the art can employ embodiments in which each or all of these elements are replaced with equivalent ones, and these embodiments are also included in the scope of the present invention.

(Embodiment)
FIG. 1 is a schematic diagram showing a schematic configuration of a typical game device in which a storage processing device according to one embodiment of the present invention is realized. Hereinafter, a description will be given with reference to FIG.

  The game apparatus 100 includes a CPU (Central Processing Unit) 101, a ROM (Read Only Memory) 102, a RAM (Random Access Memory) 103, an interface 104, a controller 105, an external memory 106, an image processing unit 107, A DVD (Digital Versatile Disk) -ROM drive 108, a NIC (Network Interface Card) 109, and an audio processing unit 110.

  A DVD-ROM storing a game program and data is loaded into the DVD-ROM drive 108 and the game apparatus 100 is turned on to execute the program, thereby realizing the storage processing apparatus of the present embodiment. The

  The CPU 101 controls the overall operation of the game apparatus 100 and is connected to each component to exchange control signals and data.

The ROM 102 stores an IPL (Initial Program Loader) that is executed immediately after the power is turned on. When the CPU 101 executes this IPL, the program recorded on the DVD-ROM is read to the RAM 103, and execution by the CPU 101 is started.
The ROM 102 stores an operating system program and various data necessary for operation control of the entire game apparatus 100.

  The RAM 103 is for temporarily storing data and programs, and holds programs and data read from the DVD-ROM, other data necessary for game progress and chat communication, and the like.

  The controller 105 connected via the interface 104 receives an operation input performed when the user executes the game.

  For example, chat communication log data is rewritably stored in the external memory 106 detachably connected via the interface 104. The user can store these data in the external memory 106 as appropriate by inputting an instruction via the controller 105.

  The DVD-ROM mounted on the DVD-ROM drive 108 stores a program for realizing the game and image data and audio data associated with the game as described above. Under the control of the CPU 101, the DVD-ROM drive 108 performs a reading process on the DVD-ROM mounted on the DVD-ROM drive 108 to read out necessary programs and data. The read data is temporarily stored in the RAM 103 or the like.

  The image processing unit 107 processes the data read from the DVD-ROM by an image arithmetic processor (not shown) included in the CPU 101 or the image processing unit 107, and then processes the processed data on a frame memory ( (Not shown). The image information recorded in the frame memory is converted into a video signal at a predetermined synchronization timing and output to a monitor (not shown) connected to the image processing unit 107. Thereby, various image displays are possible.

  The image calculation processor can execute a two-dimensional image overlay calculation, a transmission calculation such as α blending, and various saturation calculations at high speed.

  In addition, the polygon information arranged in the three-dimensional virtual space and added with various kinds of texture information is rendered by the Z buffer method, and a rendering image obtained by overlooking the polygon arranged in the three-dimensional virtual space from a predetermined viewpoint position is obtained. High speed execution of the obtained operation is also possible.

  Further, the CPU 101 and the image arithmetic processor operate in a coordinated manner, so that a character string can be drawn as a two-dimensional image in a frame memory or drawn on the surface of each polygon according to font information that defines the character shape. is there. The font information is recorded in the ROM 102, but it is also possible to use dedicated font information recorded in the DVD-ROM.

  The NIC 109 is for connecting the game apparatus 100 to a computer communication network (not shown) such as the Internet. The NIC 109 is based on, for example, a 10BASE-T / 100BASE-T standard used when configuring a LAN (Local Area Network), an analog modem for connecting to the Internet using a telephone line, ISDN (Integrated Services). A digital network (ADSL) modem, an ADSL (Asymmetric Digital Subscriber Line) modem, a cable modem for connecting to the Internet using a cable television line, and an interface (not shown) that mediates between these and the CPU 101. The

  The current date and time information can be obtained by connecting to an SNTP server in the Internet via the NIC 109 and acquiring information therefrom. In addition, various network game server devices may be configured and configured to perform the same functions as the SNTP server.

  The audio processing unit 110 converts audio data read from the DVD-ROM into an analog audio signal and outputs the analog audio signal from a speaker (not shown) connected thereto. Further, under the control of the CPU 101, sound effects and music data to be generated during the progress of the game are generated, and sound corresponding to this is output from the speaker.

  In addition, the game apparatus 100 may be configured to perform the same function as a DVD-ROM or the like mounted on the ROM 102, the RAM 103, and the DVD-ROM drive 108 using a large-capacity external storage device such as a hard disk. Good.

  The storage processing device according to the present embodiment is realized on game device 100 or a portable game device, but can also be realized on a general computer. On the other hand, information providing server 300 according to the present embodiment is usually realized on a general computer, but game device 100 may be used as information providing server 300. Similar to the game apparatus 100, a general computer includes a CPU, RAM, ROM, DVD-ROM drive, and NIC, an image processing unit having functions simpler than the game apparatus 100, and external storage. In addition to having a hard disk as a device, a flexible disk, a magneto-optical disk, a magnetic tape, and the like can be used. In addition, a keyboard, a mouse or the like is used as an input device instead of a controller. Then, after the program is installed, when the program is executed, it can function as a storage processing device or an information providing server.

  Hereinafter, unless otherwise noted, the storage processing device 200 and the information providing server 300 will be described using the game device 100 shown in FIG. The storage processing device 200 and the information providing server 300 can be appropriately replaced with general computer elements as necessary, and these embodiments are also included in the scope of the present invention.

  FIG. 2 is a schematic diagram showing a schematic configuration of the storage processing device 200 and the information providing server 300 according to the present embodiment. In FIG. 2, one storage processing device 200 and one information providing server 300 are shown for ease of understanding, but typically, as shown in FIG. One or more storage processing devices 200 are connected via the communication network 10. Hereinafter, the storage processing apparatus 200 will be described first with reference to this figure.

The storage processing device 200 is a device that suppresses unauthorized rewriting of data, and is typically applied to a game terminal or the like. As shown in FIG. 2, the storage processing device 200 includes a parameter storage unit 201, a table storage unit 202, an address acquisition unit 203, a read / write unit 204, an update unit 205, a table reception unit 206, a reply unit 207, and the like.
Hereinafter, each component of the storage processing device 200 will be described.

  As described above, the parameter storage unit 201 stores various parameters representing the game state. The parameter storage unit 201 is typically composed of an external memory 106 such as a memory card, that is, a nonvolatile storage device. The parameter group stored in the parameter storage unit 201 is appropriately accessed by a later-described read / write unit 204 or the like.

  The table storage unit 202 associates a virtual address for accessing various parameter data stored in the parameter storage unit 201 with a real address in the parameter storage unit 201 where the parameter data is actually stored. Remember the table. Typically, a volatile storage device such as the RAM 103 functions as the table storage unit 202.

  The address acquisition unit 203 receives a virtual address as input and refers to an address conversion table stored in the table storage unit 202 to acquire a real address corresponding to the address. The CPU 101, the RAM 103, and the like work together to function as the address acquisition unit 203.

  As described above, the reading / writing unit 204 is responsible for the part that actually accesses the parameter storage unit 201 in the process of saving or loading the game state in the parameter storage unit 201. The execution of the save or load process is typically instructed by the player operating an input device connected via the interface 104. In response to the instruction, the save / load program in the game program is expanded in the RAM 103, and the CPU 101 executes a save / load process according to the expanded program. In these save / load processes, an access request designating a virtual address is issued to the read / write unit 204. The read / write unit 204 acquires a real address associated with the designated virtual address with reference to the address conversion table, and performs actual read / write on the real address. As described above, the CPU 101, the RAM 103, and the like operate in cooperation to function as the reading / writing unit 204.

  The table receiving unit 206 receives an address conversion table and the like from the information providing server 300. The NIC 109 or the like functions as the table receiving unit 206.

  The updating unit 205 overwrites and updates the address conversion table stored in the table storage unit 202 with the new address conversion table received by the table receiving unit 206. Even if the address conversion table changes, the updating unit 205 replaces the data in the parameter storage unit 201 so that the data consistency is maintained, that is, the same data can be accessed when the same virtual address is designated. . Details of the consistency maintenance will be described later in the operation explanation section. In this way, the CPU 101, the RAM 103, and the like cooperate to function as the update unit 205.

  When the reply unit 207 newly receives an address conversion table from the information providing server 300, the reply unit 207 performs the following processing. In other words, in order to have the information providing server 300 determine whether there has been an illegal write in the address conversion table, the address conversion table and identification information for identifying itself are transmitted to the information providing server 300. As described above, the CPU 101, the RAM 103, the NIC 109, and the like cooperate to function as the reply unit 207.

  Next, the information providing server 300 will be described with reference to FIG. Here, the information providing server 300 will be described as realizing the information providing server 300 by the game device 100 different from the storage processing device 200.

  The candidate storage unit 301 stores a plurality of address conversion tables for transmission to the storage processing device 200. For example, the address conversion table may be created in advance and stored in the external memory 106 such as a hard disk, and may be read and used in the RAM 103 or the like at the time of activation. As described above, the CPU 101, the RAM 103, the external memory 106, and the like cooperate to function as the candidate storage unit 301.

  The table transmission unit 302 selects one of a plurality of address conversion tables stored in the candidate storage unit 301 in the storage processing device 200 at a predetermined timing, for example, at a predetermined time interval or at a predetermined time. Send. Which address conversion table is to be transmitted from a plurality of addresses may be selected at random, for example. As described above, the CPU 101, the RAM 103, the NIC 109, and the like cooperate to function as the table transmission unit 302.

  As illustrated in FIG. 9, the transmission information storage unit 303 stores the address conversion table transmitted by the table transmission unit 302 and the storage processing device 200 of the transmission destination in association with each other. For example, the candidate storage unit 301 may store a table identification number that identifies the table in association with the address conversion table. Then, the transmission information storage unit 303 stores the table identification information and the identification information for identifying the destination storage processing device 200 in association with each other. The contents of the transmission information storage unit 303 are stored in an external memory 106 such as a hard disk and accessed via the RAM 103 as appropriate. As described above, the CPU 101, the RAM 103, and the external memory 106 cooperate to function as the transmission information storage unit 303.

  The reception unit 304 receives an address conversion table and identification information for identifying the storage processing device 200 from the storage processing device 200. Thus, the NIC 109 mainly functions as the receiving unit 304.

  The determination unit 305 determines whether or not there is any unauthorized writing in the address conversion table received from the reception unit 304 by comparing with the address conversion table stored in the candidate storage unit 301. Although details of the operation will be described later, since the determination unit 305 refers to the candidate storage unit 301, the CPU 101, the RAM 103, and the like function as the candidate storage unit 305 in cooperation.

  Operations of the storage processing device 200 and the information providing server 300 having the above-described configurations will be described below.

(Update address translation table)
FIG. 4 is a diagram illustrating a flow in which the storage processing device 200 updates the address conversion table transmitted from the information providing server 300 as its own address conversion table.

  First, the table transmission unit 302 of the information providing server 300 is configured at a predetermined timing (for example, a predetermined time interval, a predetermined time, or a timing at which the storage processing device 200 is connected to the network and transmits a signal to the information providing server 300). Then, for example, one address conversion table is randomly selected from the candidate storage unit 301 (step S101). Then, the table is transmitted to the storage processing device 200 (step S102).

  Here, it is assumed that the identification information (for example, serial number) of the storage processing device 200 is registered in advance in the information providing server 300 by the player. Alternatively, the storage processing device 200 stores the network address of the information providing server 300 in the ROM 102 and the like, and when the storage processing device 200 is connected to the communication network 10 for the first time, the storage processing device identification information is always sent to the information providing server 300. You may make it transmit. The received information providing server 300 may store the information in the external memory 106 such as a hard disk. The table transmission unit 302 of the information providing server transmits an address conversion table to each of the registered storage processing devices 200 at a predetermined timing.

  The transmission information storage unit 303 stores the table identification information for identifying the address conversion table selected in step S101 and the identification information of the storage processing device that is the transmission destination of the address conversion table in association with each other (step S103). Note that step S103 may be performed in parallel with step S102 or before step S102.

  Next, when the table receiving unit 206 of the storage processing device 200 receives the address conversion table (step S121), the updating unit 205 temporarily stores the received table in the RAM 103 (step S122). When the same virtual address is designated, the data stored in the real address obtained by referring to the address conversion table currently stored in the table storage unit 202 and the newly received address conversion table are obtained. The data stored in the real address is switched so that the data stored in the real address matches the data stored in the real address (step S123).

  FIG. 5 shows how data in the parameter storage unit 201 is exchanged. The old address conversion table is A, and the new address conversion table is B. At this time, for example, if virtual address 0 is specified, when referring to table A, real address 1 is acquired, and 0x01 stored in real address 1 in parameter storage unit 201 is read (0x means hexadecimal) ). On the other hand, even if the virtual address 0 is designated in the same manner, when the table B is referred to, the real address n is obtained. Therefore, in the address n of the parameter storage unit 201 ′ after the data exchange, the data stored in the address 1 of the parameter storage unit 201 before the data exchange, the data in the parameter storage unit 201 so that 0x01 is stored. Need to be replaced.

Similarly, when referring to the table A and referring to the virtual address 1, the real address n is acquired. When referring to the table B and referring to the virtual address 1, the real address 0 is acquired. Therefore, the data is replaced so that the data 0x12 stored in the actual address n of the parameter storage unit 201 is stored in the actual address 0 of the parameter storage unit 201 ′.
When all the data are replaced in the same manner, a parameter storage unit 201 ′ having a data configuration as shown in the lower part of FIG. 5 is obtained. During the data replacement process, data reading / writing with respect to the parameter storage unit 201 is not performed.

  When the replacement of the real address data is completed, the updating unit 205 stores the new table temporarily stored in the RAM 103 in step S122 in the table storage unit 202 (step S124), and ends the address conversion table updating process.

(Judgment of fraud against address translation table)
When the storage processing device 200 transmits its own address conversion table to the information providing server 300, the information providing server 300 determines whether the table has been illegally rewritten. This fraud determination process will be described with reference to FIG.

  When the new address conversion table is stored in the table storage unit 202 in step S124, the reply unit 207 of the storage processing device 200 sends the old address conversion table and the storage processing device identification information for identifying itself to the information providing server 300. Transmit (step S201). When the update unit 205 stores a new address conversion table in the table storage unit 202, the update unit 205 temporarily stores the old address conversion table in the RAM 103, and the update unit 205 transmits the table stored in the RAM 103. It shall be.

  Next, when the reception unit 304 of the information providing server 300 receives the data transmitted from the reply unit 207 (step S221), the determination unit 305 refers to the transmission information storage unit 303 and receives the received storage processing device. The table identification information associated with the identification information is acquired. Then, an address conversion table associated with the acquired table identification information is acquired (step S222). The determination unit 305 compares the acquired address conversion table with the address conversion table received from the storage processing device in step S221) (step S223). If the two tables match (step S224; Yes), the determination unit 305 determines that there has been no unauthorized rewriting of the address conversion table in the storage processing device 200 (step S225), and ends the process. On the other hand, if the two do not match (step S226; No), it is determined that there has been an unauthorized rewrite, and for example, a countermeasure is taken such as issuing a warning to the storage processing device having the storage processing device identification information. .

(Reading data)
Processing for reading data using the address conversion table updated as described above will be described with reference to FIG.

  When the storage processing device 200 is powered on and the external memory 106 such as a memory card is inserted, the player operates the operation unit such as the controller 105 to load the parameter group stored in the parameter storage unit 201. Suppose you have instructed In accordance with the instruction, the CPU 101 executes the load program as described above, and the load process is started.

  The CPU 101 of the storage processing device 200 first determines whether an address conversion table is stored in the table storage unit 202 according to the load program (step S301). In the storage processing device 200 according to the present embodiment, the address conversion table is stored only in the RAM 103 in order to make rewriting difficult. Therefore, when the power is turned off, the information in the table is lost. Therefore, when the reading process is the first reading process after turning on the power, it is necessary to receive the address conversion table used before turning off the power from the information providing server 300.

When it is determined that the address conversion table is not stored in the table storage unit 202 (step S301; No), the reply unit 207 of the storage processing device 200 sends the storage processing device identification information for identifying itself to the information providing server 300. Transmit (step S302). The receiving unit 304 of the information providing server 300 receives the storage process identification information (step S321). The table transmission unit 302 acquires the address conversion table specified by the table identification information stored in association with the received storage process identification information from the candidate storage unit 301 (step S322). Then, the specified table is transmitted to the storage processing device 200 (step S323). The table reception unit 206 of the storage processing device receives the table (step 303) and stores it in the table storage unit 202 (step S304).
If it is determined as Yes in step S301, the process proceeds to step S305.

  Next, the CPU 101 of the storage processing device 200 designates the stored virtual address and data length of each parameter, and transmits a read request to the read / write unit 204 (step S305). The read / write unit 204 controls the address acquisition unit 203 to acquire a real address corresponding to the virtual address (step S306). The read / write unit 204 reads data stored at the acquired real address (step S307). Steps S305 to S307 are repeated until all parameters have been read.

  For example, as described in the address conversion table update process, when the address conversion table A shown in FIG. 5 is held, a read request is issued by designating data stored in the virtual address 0. The real address 1 is acquired, and 0x01 stored in the real address 1 in the parameter storage unit 201 is read (0x means hexadecimal).

  Next, for example, when referring to the address conversion table A, it is assumed that the virtual address 1 is specified and short type data (that is, 2 bytes are required for storage) is read. In this case, the load program issues a read request to the read / write unit 204 to read 2-byte length data from the virtual address 1. When receiving the read request, the read / write unit 204 controls the address acquisition unit to acquire the virtual address 1, the real address n corresponding to the virtual address 2, and the real address 0. Then, the data (0x12 and 0x00) stored in each of the real addresses n and 0 are acquired, arranged in the correct byte order, and returned as 2-byte length data. For example, if the byte order is big endian, 0x12 is the upper byte and 0x00 is the lower byte, and 0x1200 (that is, 4608 in decimal) is obtained.

  Similarly, for the data that requires n bytes, the data of the real addresses corresponding to the virtual addresses from the start address to n−1 are obtained, arranged in the correct byte order, and returned as n-byte length data.

(Data writing)
In the state where the storage processing device 200 is turned on and the external memory 106 such as a memory card is inserted, the player operates the operation unit such as the controller 105 and various parameters representing the game state are stored in the parameter storage unit. Suppose that an instruction is given to save to 201. The CPU 101 executes the save program according to the instruction.

  In accordance with the save program, the CPU 101 of the storage processing device 200 first determines whether or not an address conversion table is stored in the table storage unit 202 as in step S301 of the read process (step S401). If it is determined that the conversion table is not stored in the table storage unit 202, steps S402, S421 to S423, and S402 to S403, which are the same processes as steps S302, S321 to S323, and S302 to S304, are executed. The address conversion table is received from the information providing server 300.

  Next, the CPU 101 of the storage processing device 200 designates a virtual address for storing each parameter, a data length, and data to be written, and transmits a write request to the read / write unit 204 (step S405). The read / write unit 204 controls the address acquisition unit 203 to acquire a real address corresponding to the virtual address (step S406). The read / write unit 204 obtains the real address across the specified number of bytes in the reverse manner to the time of reading, divides the data to be written into bytes, and writes the data to the corresponding real address (step) S407). Steps S405 to S407 are repeated until all parameters have been written.

  As described above, the above embodiment adopts the address conversion table and updates it at a predetermined timing, thereby making it difficult to estimate at which position on the memory card the parameter is stored. As a result, it is possible to suppress rewriting of illegal parameters. In the above embodiment, the parameter storage unit that is a non-volatile storage medium is read and written by specifying a virtual address, but the same suppression effect can be obtained even if this method is applied to a volatile storage medium. .

  As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment mentioned above, A various deformation | transformation and application are possible. Moreover, it is also possible to freely combine the constituent elements of the above-described embodiments.

  For example, in the above-described embodiment, only one address conversion table is used. However, an address conversion table may be prepared for each game or for each saved file created in each game.

  In the above embodiment, an example is shown in which a plurality of storage processing devices are connected to one information providing server. However, a plurality of information providing servers are prepared and each information providing server is provided with each information providing server. A plurality of storage processing devices may be connected. In this case, each storage processing device is uniquely determined as to which information providing server receives the address conversion table, and the information providing server assigned to the storage processing device also determines whether or not the address conversion table is invalid. Should do.

  In the above embodiment, the information providing server includes a transmission information storage unit to manage which address conversion table is transmitted to which storage processing device, and to determine fraudulent acts on the address conversion table. went. However, instead, the storage processing device may store which address conversion table is used.

  That is, the information providing server side does not include a transmission information storage unit. Instead, the table transmission unit transmits table identification information for identifying the address conversion table together with the address conversion table to the storage processing device. It is assumed that the table identification information is stored in the candidate storage unit or the like.

  On the other hand, on the storage processing device side, the received table identification information is temporarily stored in the RAM 103 or the like. When the power is turned off, the table identification information is transferred from the RAM 103 to a nonvolatile storage medium such as a card memory. The reply unit transmits the stored table identification information together with the address conversion table to the information providing server. And the information provision server side should just acquire the address conversion table matched with the received table identification information from a candidate memory | storage part, and should compare the acquired address conversion table with what was received from the memory | storage processing apparatus, for example. .

  Further, in the above embodiment, the storage processing device transmits the address conversion table itself to the information providing server in order to determine illegal writing. Instead, the table transmission unit may transmit a result (hash value) obtained by applying a predetermined hash function to the address conversion table to the information providing server. By transmitting the hash value, it is possible to reduce the communication cost compared to transmitting the address conversion table itself. For example, instead of steps S221 to 223 in FIG. 6, the information providing server side receives the hash value and the storage processing device identification information, obtains the hash value of the acquired address conversion table, and compares both hash values. . The hash function may be an existing one such as MD5.

  In the above embodiment, the information providing server provides the address conversion table to the storage processing device. Instead, the storage processing device itself may generate the address conversion table. For example, as shown in FIG. 10, the storage processing device 200 ′ is configured not to include a table receiving unit or a reply unit. Then, the updating unit 205 ′ updates the address conversion table by randomly replacing it at a predetermined timing (for example, at a fixed time or a predetermined time interval). After that, processing similar to steps S122 to S124 shown in FIG. 4 is performed, and table update processing is executed.

  However, when the storage processing device generates the address conversion table on its own, it is necessary to restore the contents of the address conversion table before the power is turned off when the power is turned on. Therefore, at the time of execution, it is necessary to use a nonvolatile storage medium such as a RAM as the table storage unit, and to transfer the contents of the table storage unit to a nonvolatile storage medium such as a memory card when the power is turned off.

It is a mimetic diagram showing the outline composition of the typical game device in which the storage processing unit etc. concerning an embodiment of the invention are realized. It is a block diagram which shows the schematic structure of the memory | storage processing apparatus which concerns on this Embodiment, and an information provision server. It is a figure which shows the example of a connection of the memory | storage processing apparatus assumed by this Embodiment, and an information provision server. It is a flowchart explaining the update process of the address conversion table which concerns on this Embodiment. It is a flowchart explaining the example which replaced the data in a parameter memory | storage part at the time of the update of an address conversion table. It is a flowchart explaining the determination process of the fraudulent act which concerns on this Embodiment. It is a flowchart explaining the read-out process which concerns on this Embodiment. It is a flowchart explaining the write-in process which concerns on this Embodiment. It is the figure which showed the structural example of the transmission information storage part which concerns on this Embodiment. It is a block diagram which shows schematic structure of the storage processing apparatus which concerns on other embodiment of this invention.

Explanation of symbols

100 game machine 101 CPU
102 ROM
103 RAM
104 Interface 105 Controller 106 External Memory 107 Image Processing Unit 108 DVD-ROM Drive 109 NIC
DESCRIPTION OF SYMBOLS 110 Speech processing unit 200 Storage processing device 201 Parameter storage unit 202 Table storage unit 203 Address acquisition unit 204 Read / write unit 205 Update unit 206 Table reception unit 207 Reply unit 300 Information providing server 301 Candidate storage unit 302 Table transmission unit 303 Transmission information storage Unit 304 table transmission unit 305 determination unit

Claims (14)

A parameter storage unit for storing parameter groups;
A table storage unit that stores an address conversion table that associates a real address in the parameter storage unit in which each parameter of the parameter group is stored with a virtual address that is designated to access the parameter;
With the specified virtual address as an input, referring to the address conversion table, an address acquisition unit that acquires the real address of the parameter storage unit;
Upon receiving a read / write request for the specified virtual address, the address acquisition unit is controlled to acquire a real address corresponding to the virtual address, and read / write is performed on the acquired real address of the parameter storage unit. The reading and writing section to perform,
The address conversion table is updated at a predetermined timing, and when each virtual address is specified, data stored in a real address obtained by referring to the address conversion table before update, and the address after update An update unit that updates data stored in the real address so that the data stored in the real address obtained by referring to the conversion table matches;
A storage processing device characterized by comprising :
The storage processing device is connected to an information providing server via a network;
A table receiving unit for receiving the address conversion table from the information providing server;
The update unit updates the address conversion table with the received address conversion table;
A storage processing device . The storage processing device according to claim 1 ,
When the update unit updates the address conversion table and the data stored in the real address, the address conversion table stored in the table storage unit immediately before the update and the storage processing device for identifying itself A reply unit that returns identification information to the information providing server,
A storage processing apparatus, further comprising: The storage processing device according to claim 2 ,
The reply unit returns a result of applying a predetermined hash function to the address conversion table stored in the table storage unit immediately before being updated, instead of the address conversion table, to the information providing server.
A storage processing device. The storage processing device according to claim 2 ,
The table receiving unit further receives table identification information associated with an address conversion table from the information providing server,
The reply unit returns the received table identification information to the information providing server instead of the storage processing device identification information for identifying the self.
A storage processing device. The storage processing device according to claim 1 ,
The parameter storage unit is a nonvolatile storage medium, and the table storage unit is a volatile storage medium.
A storage processing device. An information providing server connected to a storage processing device via a network,
A candidate storage unit that stores a plurality of address conversion tables that associate the real addresses of the storage processing device with the virtual addresses that are designated to access each of the real addresses;
A table transmission unit that transmits the address conversion table to the storage processing device at a predetermined timing;
A transmission information storage unit that stores the address conversion table in association with the storage processing device identification information that identifies the storage processing device that is the transmission destination of the address conversion table;
A receiving unit that receives an address conversion table returned from the storage processing device, and storage processing device identification information that identifies the storage processing device of the transmission source;
Referring to the transmission information storage unit, obtains an address conversion table associated with the received storage processing device identification information, compares the address conversion table with the received address conversion table, and both tables are A determination unit that determines that there is no data falsification if they match, and that there is data falsification if both tables do not match;
Comprising
An information providing server characterized by that. The information providing server according to claim 6 ,
The receiving unit receives a result of applying a predetermined hash function to the address conversion table instead of the address conversion table from the storage processing device,
The determination unit refers to the transmission information storage unit, obtains an address conversion table associated with the received storage processing device identification information, and results of applying a predetermined hash value function to the address conversion table; The received hash value is compared, and if both match, it is determined that the data has not been falsified, and if both do not match, it is determined that the data has been falsified.
An information providing server characterized by that. An information providing server connected to a storage processing device via a network,
Stores a plurality of address conversion tables for associating the real addresses of the storage processing device with virtual addresses designated for accessing each of the real addresses, and identifies the address conversion table for each of the address conversion tables A candidate storage unit for storing table identification information to be
A table transmission unit for transmitting the address conversion table and corresponding table identification information to the storage processing device at a predetermined timing;
A receiving unit that receives the address conversion table returned from the storage processing device and the corresponding table identification information;
An address conversion table corresponding to the table identification information is acquired from the candidate storage unit, the address conversion table and the received address conversion table are compared, and if both tables match, there is no data falsification. A determination unit that determines that data has been tampered with if the tables do not match;
Comprising
An information providing server characterized by that. An operation method of a storage processing device connected to an information providing server via a network , comprising a parameter storage unit, a table storage unit, an address acquisition unit, a read / write unit, a table reception unit, and an update unit. There,
A parameter storage step in which the parameter storage unit stores a parameter group;
A table storage step for storing an address conversion table in which the table storage unit associates a real address in the parameter storage unit in which each parameter of the parameter group is stored with a virtual address designated to access the parameter; ,
The address acquisition unit receives the specified virtual address as an input, refers to the address conversion table, and acquires an actual address of the parameter storage unit; and
When the read / write unit receives a read / write request for a designated virtual address, the address storage unit is controlled to acquire a real address corresponding to the virtual address of the parameter storage unit, and the parameter storage unit A reading and writing process of reading and writing to the acquired real address of
A table receiving step in which the table receiving unit receives the address conversion table from the information providing server;
The update unit updates the address conversion table with the received address conversion table at a predetermined timing, and further, when each virtual address is designated, is obtained by referring to the address conversion table before the update. An update process for updating the data stored in the real address so that the data stored in the address matches the data stored in the real address obtained by referring to the updated address conversion table;
A method of operating a storage processing device, comprising: A method of operating an information providing server connected to a storage processing device via a network, comprising a candidate storage unit, a table transmission unit, a transmission information storage unit, a reception unit, and a determination unit,
A candidate storage step for storing a plurality of address conversion tables in which the candidate storage unit associates a real address of the storage processing device with a virtual address designated for accessing each of the real addresses;
A table transmission step in which the table transmission unit transmits the address conversion table to the storage processing device at a predetermined timing;
A transmission information storage step in which the transmission information storage unit stores the address conversion table in association with storage processing device identification information for identifying the storage processing device that is a transmission destination of the address conversion table;
A receiving step for receiving the address conversion table returned from the storage processing device and the storage processing device identification information for identifying the storage processing device of the transmission source;
The determination unit refers to the transmission information storage unit, acquires an address conversion table associated with the received storage processing device identification information, and compares the address conversion table with the received address conversion table And a determination step for determining that the data has not been falsified when both tables match, and that the data has been falsified when both tables do not match,
Comprising
An operating method of the information providing server, characterized in that An operation method of an information providing server connected to a storage processing device via a network, comprising a candidate storage unit, a table transmission unit, a reception unit, and a determination unit,
The candidate storage unit stores a plurality of address conversion tables associating real addresses of the storage processing device and virtual addresses designated for accessing each of the real addresses, and for each of the address conversion tables, A candidate storage step for storing table identification information for identifying the address conversion table;
A table transmission step in which the table transmission unit transmits the address conversion table and corresponding table identification information to the storage processing device at a predetermined timing;
A receiving step in which the receiving unit receives an address conversion table returned from the storage processing device and corresponding table identification information;
The determination unit acquires an address conversion table corresponding to the table identification information from the candidate storage unit, compares the address conversion table with the received address conversion table, and if both tables match, A determination step for determining that the data has been falsified when there is no falsification and the two tables do not match;
Comprising
An operating method of the information providing server, characterized in that A program for causing a computer connected to an information providing server via a network to function as a storage processing device,
The program causes the computer to
A parameter storage unit for storing parameter groups;
A table storage unit that stores an address conversion table that associates a real address in the parameter storage unit in which each parameter of the parameter group is stored with a virtual address that is designated to access the parameter;
An address acquisition unit that acquires a real address of the parameter storage unit by referring to the address conversion table with a specified virtual address as input,
Upon receiving a read / write request for the specified virtual address, the address acquisition unit is controlled to acquire a real address corresponding to the virtual address, and read / write is performed on the acquired real address of the parameter storage unit. Reading and writing part,
A table receiving unit for receiving the address conversion table from the information providing server;
Based on the received address conversion table, the address conversion table is updated at a predetermined timing. Further, when each virtual address is designated, it is stored in a real address obtained by referring to the address conversion table before update. An update unit for updating the data stored in the real address so that the data matches the data stored in the real address obtained by referring to the updated address conversion table;
Function as
A program characterized by that. A program for causing a computer connected to a storage processing device via a network to function as an information providing server,
The program causes the computer to
A candidate storage unit that stores a plurality of address conversion tables that associate real addresses of the storage processing device with virtual addresses that are designated to access each of the real addresses;
A table transmission unit that transmits the address conversion table to the storage processing device at a predetermined timing;
A transmission information storage unit that stores the address conversion table in association with storage processing device identification information that identifies the storage processing device that is the transmission destination of the address conversion table;
A receiving unit that receives an address conversion table returned from the storage processing device and storage processing device identification information for identifying the storage processing device of the transmission source;
Referring to the transmission information storage unit, obtains an address conversion table associated with the received storage processing device identification information, compares the address conversion table with the received address conversion table, and both tables are A determination unit that determines that there is no data falsification if they match, and that there is data falsification if both tables do not match,
Function as
A program characterized by that. A program for causing a computer connected to a storage processing device via a network to function as an information providing server,
The program stores a plurality of address conversion tables associating the computer with real addresses of the storage processing device and virtual addresses that are designated to access the real addresses, and for each of the address conversion tables A candidate storage unit for storing table identification information for identifying the address conversion table;
A table transmission unit for transmitting the address conversion table and corresponding table identification information to the storage processing device at a predetermined timing;
A receiving unit that receives the address conversion table returned from the storage processing device and the corresponding table identification information;
An address conversion table corresponding to the table identification information is acquired from the candidate storage unit, the address conversion table and the received address conversion table are compared, and if both tables match, there is no data falsification. A determination unit that determines that the data has been altered if the tables do not match;
Function as
A program characterized by that.

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