JP2017091496A - Information processing device, information processing method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To establish a method that effectively functions even when a falsification detection method becomes publicly known or a detection program code itself is falsified, as a new countermeasure technique against falsification of operation history.SOLUTION: A vibration information acquisition unit 111 acquires, from a player terminal 1, vibration history information showing time series of detection results by a vibration detection unit 31 of the player terminal 1. An operation information acquisition unit 113 acquires, from the player terminal 1, vibration history information showing time series of detection results by a touch operation input unit 26 of the player terminal 1. An operation information legitimacy determination unit 114 determines legitimacy of the operation history information by comparing the operation history information acquired by the operation information acquisition unit 113 with the vibration history information that has been determined to be legitimate by a vibration information legitimacy determination unit 112.SELECTED DRAWING: Figure 6

Description

  The present invention relates to an information processing apparatus, an information processing method, and a program.

  Conventionally, as a game that can be executed on a terminal such as a smartphone, there is a game having a ranking function in which a plurality of players compete, a battle function between players, and a battle function between groups of players (see, for example, Patent Document 1).

In such games, the act of falsifying the program code, data stored in the terminal, data sent to the server through the network, for example, falsifying the operation history as if gaining a high score The existence of a person who illegally obtains an item, alters the number of items, and obtains a large number of rare items becomes a problem (see, for example, Patent Document 2).
Hereinafter, these actions are collectively referred to as “operation history falsification actions”. Also, a person who performs an operation history falsification action or the like is hereinafter referred to as a “falsifier”.
Such manipulation history manipulation is a problem that applies not only to games but also to general information processing.

  Conventionally, various methods have been proposed for countermeasure techniques such as manipulation history falsification. As typical techniques, there are a technique for detecting falsification of application software to binary data and a technique for detecting falsification of storage and memory areas read / written by the application software.

JP 2013-587 A Japanese Patent No. 4385863

However, with the conventional methods for countermeasure techniques such as tampering actions of these operation histories, when the method of detecting the tampering is publicly known, or when the program code that performs the detection itself is subject to tampering, Did not work effectively.
Therefore, there is a demand for new countermeasure technology such as manipulation history manipulation that works effectively even when the tampering detection method becomes publicly known or when the detection program code itself is subject to tampering. It is a situation.

  The present invention has been made in view of such a situation, and when a technique for detecting falsification is known in a new countermeasure technique such as manipulation history falsification or the like, a program code itself for performing detection is provided. The purpose is to establish a method that works effectively even if it is subject to tampering.

In order to achieve the above object, an information processing apparatus of one embodiment of the present invention provides:
In an information processing apparatus including a plurality of terminals capable of executing a game by receiving operations of a plurality of players and a server,
A first detection unit for detecting vibrations generated by the own machine;
A display unit for displaying an image on a predetermined display surface;
A second detector that is stacked on the display surface and detects contact of an object in a predetermined manner;
An execution unit that executes predetermined processing based on a touch operation by contact of the object;
A device containing
In an information processing apparatus that communicates and receives information,
First acquisition means for acquiring vibration history information indicating a time series of detection results of the first detection unit from the terminal;
Second acquisition means for acquiring operation history information indicating a time series of the touch operation from the terminal;
First determination means for determining the legitimacy of the operation history information by comparing the vibration history information and the operation history information;
Is provided.

  An information processing method and program according to one embodiment of the present invention are an information processing method and program corresponding to the information processing apparatus according to one embodiment of the present invention described above.

  According to the present invention, in a new countermeasure technique such as manipulation history falsification and the like, it is effective even when a falsification detection method becomes publicly known or when a program code to detect is subject to falsification. A working approach can be established.

It is a block diagram which shows the structure of the information system which concerns on one Embodiment of this invention. It is a block diagram which shows the hardware constitutions of the player terminal as one Embodiment of the terminal of this invention among the information processing apparatuses of FIG. It is a block diagram which shows the hardware constitutions of the server which concerns on one Embodiment of this invention among the information processing apparatuses of FIG. It is a timing chart of the detection result of the acceleration sensor of the player terminal of FIG. It is a figure which compares and verifies the legitimacy of the operation history information of a player terminal with the vibration history information in which the legitimacy is confirmed. It is a functional block diagram which shows the functional structural example for performing operation history alteration detection control among the functional structures of the player terminal of FIG. 2, and the server of FIG. 7 is a flowchart for explaining an example of a flow of operation history alteration detection processing executed by a server having the functional configuration of FIG. 6.

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

FIG. 1 shows the configuration of an information processing system according to an embodiment of the present invention.
The information processing system shown in FIG. 1 is a system that includes player terminals 1-1 to 1 -m used by m players (m is an arbitrary integer value of 1 or more) and a server 2. Each of the player terminals 1-1 to 1-m and the server 2 are connected to each other via a predetermined network N such as the Internet.

The server 2 provides a game execution environment to each of the player terminals 1-1 to 1-m, and provides various services related to the game executed on each of the player terminals 1-1 to 1-m. To do.
Each of the player terminals 1-1 to 1-m includes a smartphone or the like operated by each player, and executes various processes such as game execution.
Hereinafter, when it is not necessary to individually distinguish each of the player terminals 1-1 to 1-m, these are collectively referred to as “player terminal 1”.

  FIG. 2 is a block diagram showing a hardware configuration of the player terminal 1 in the information processing system of FIG.

The player terminal 1 is configured by a smartphone or the like as described above.
The player terminal 1 includes a CPU (Central Processing Unit) 21, a ROM (Read Only Memory) 22, a RAM (Random Access Memory) 23, a bus 24, an input / output interface 25, a touch operation input unit 26, a display Unit 27, input unit 28, storage unit 29, communication unit 30, vibration detection unit 31, and drive 32.

The CPU 21 executes various processes according to a program recorded in the ROM 22 or a program loaded from the storage unit 29 to the RAM 23.
The RAM 23 appropriately stores data necessary for the CPU 21 to execute various processes.

  The CPU 21, ROM 22, and RAM 23 are connected to each other via a bus 24. An input / output interface 25 is also connected to the bus 24. A touch operation input unit 26, a display unit 27, an input unit 28, a storage unit 29, a communication unit 30, a vibration detection unit 31, and a drive 32 are connected to the input / output interface 25.

The touch operation input unit 26 includes, for example, a capacitance type or resistive film type (pressure sensitive) position input sensor stacked on the display surface of the display unit 27, and detects coordinates of a position where the touch operation is performed.
Here, the touch operation refers to an operation of contacting an object with respect to the touch operation input unit 26. The object that comes into contact with the touch operation input unit 26 is, for example, a player's finger or a touch pen.
The display unit 27 includes a display such as a liquid crystal display, and displays various images such as an image related to a game.
Thus, in this embodiment, the touch operation input unit 26 and the display unit 27 constitute a touch panel.

Here, as types of touch operations on the touch panel, for example, tap, swipe, and flick exist.
The tap is an operation in which an object comes into contact with a predetermined area on the display surface, and thereafter the object is separated from the same area as the predetermined area.
In addition, swipe and flick are a first state in which contact of an object with the display medium is started and a second state in which contact with the display medium is maintained and the position of the object is changed (second state in which the touch position is changed). State), a series of operations from the contact of the object to the display medium to the third state (third state in which the object is separated from the display medium).
Although details will be described later, when these touch operations are performed on the touch panel of the player terminal 1, the player terminal 1 is vibrated.

The input unit 28 is configured with various hardware buttons and the like, and inputs various information according to the player's instruction operation.
The storage unit 29 is configured by a DRAM (Dynamic Random Access Memory) or the like and stores various data.
The communication unit 30 controls communication performed with other devices (the server 2 and other player terminals 1 in the example of FIG. 1) via the network N including the Internet.

The vibration detection unit 31 detects vibration generated by a touch operation on the touch panel. For example, when the player terminal 1 is configured by a smartphone, the vibration detection unit 31 is configured by an acceleration sensor built in the smartphone.
More precisely, the acceleration sensor detects a triaxial acceleration component by a piezoresistive type or a capacitance type detection mechanism, and outputs acceleration data for each triaxial component representing the detection result. Then, the server 2 or the like recognizes the vibration of the player terminal 1 based on the acceleration data. However, in this specification, such acceleration data is recognized as a kind of vibration information because vibration can be recognized. That is, in this specification, the vibration detection is a broad concept including not only detecting the vibration itself but also detecting information (for example, acceleration) capable of recognizing the vibration.

  The drive 32 is provided as necessary. A removable medium 41 composed of a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is appropriately attached to the drive 32. The program read from the removable medium 41 by the drive 32 is installed in the storage unit 29 as necessary. The removable medium 41 can also store various data stored in the storage unit 29 in the same manner as the storage unit 29.

  FIG. 3 is a block diagram showing a hardware configuration of the server 2 according to an embodiment of the information processing apparatus of the present invention in the information processing system of FIG.

The server 2 includes a CPU 51, a ROM 52, a RAM 53, a bus 54, an input / output interface 55, an output unit 56, an input unit 57, a storage unit 58, a communication unit 59, and a drive 60. .
Since the configuration of the server 2 is basically the same as the configuration excluding the vibration detection unit 31 and the touch panel of the player terminal 1, the description thereof is omitted here.

The game can be executed on the player terminal 1 by the cooperation of the various hardware and various software of the player terminal 1 of FIG. 2 and the server 2 of FIG.
That is, the information processing system according to the present embodiment can execute various controls on a game in which a plurality of players can participate, such as a multi-battle. In particular, the information processing system can execute the following control as control for detecting manipulation history falsification or the like or the risk thereof (hereinafter referred to as “operation history alteration detection control”).

That is, many tamperers use a program that automatically performs a touch operation without an operation by a natural person (player) by making a computer determine the location and timing at which the touch operation should be performed. The information is falsified or counterfeited, and the operation history is falsified. Therefore, the manipulation data of the tamper is different from the information related to the regular touch operation physically input by the natural person.
Therefore, if it is possible to detect whether or not the touch operation is a normal input physically input by a natural person, it is possible to detect the manipulation history falsification action or the like or the risk thereof.

Here, when a touch operation on the touch panel of the player terminal 1 is performed, a fine vibration is always applied to the player terminal 1 main body. If this vibration can be detected, it is possible to detect whether or not the touch operation is a regular touch operation physically input by a natural person.
Specifically, when the player terminal 1 is a smartphone, an acceleration sensor is incorporated. From the time-series information of the output value (or processed value) of the acceleration sensor, it is possible to grasp whether or not the player terminal 1 vibrates, and if so, how much it vibrates.
Further, even when the player terminal 1 is provided with a vibration detection unit 31 other than the acceleration sensor, whether or not the player terminal 1 vibrates from the time series information of the detection result of the vibration detection unit 31. How much it vibrates.
Therefore, hereinafter, the time series information of the detection result of the vibration detection unit 31 including the acceleration sensor is referred to as “vibration history information”.
By using this vibration history information, it is possible to detect whether or not the touch operation is a regular touch operation physically input by a natural person. The reason is as follows. That is, the value output from the vibration detection unit 31 is observed from a physical phenomenon. The value of the vibration detection unit 31 is determined by various factors such as how to hold the player terminal 1, the size and weight of the player terminal 1 main body, and the type of the vibration detection unit 31 mounted on the player terminal 1. Therefore, it is difficult to accurately and automatically reproduce the history of output values of the vibration detection unit 31 using a program.
Hereinafter, the time series information of the output result of the acceleration sensor will be described as appropriate as an example of vibration history information.

In summary, in the operation history alteration detection control of the present embodiment, the following control process is executed. That is, the player terminal 1 (smart phone) detects vibration when a touch operation on the touch panel is performed using the acceleration sensor (vibration detection unit 31) of the smartphone, and vibrates time series information of the detection result. It is transmitted to the server 2 as history information. That is, the server 2 acquires the time series information of the detection result of the acceleration sensor of the player terminal 1 as the vibration history information of the player terminal 1.
The server 2 also acquires information indicating a history of touch operations on the player terminal 1 (hereinafter referred to as “operation history information”).
Then, the server 2 compares the operation history information with the vibration history information to determine whether the operation history information is information related to a regular touch operation physically input by a natural person, or automatically by a program or the like. Whether the information has been generated or altered. That is, the server 2 can verify the legitimacy of the operation history information related to the touch operation that can be easily falsified and counterfeited using the vibration history information that is difficult to falsify and counterfeit.

Here, as described above, it is difficult for a program or the like to imitate the detection result of the acceleration sensor resulting from the touch operation physically input by the natural person. However, it cannot be said that a program or the like cannot be imitated.
Therefore, in the present embodiment, the server 2 holds information (hereinafter referred to as “index information”) that serves as an index for determining whether or not the vibration history information is valid. The index information of the present embodiment is generated based on vibration history information obtained from the detection result of the acceleration sensor resulting from the touch operation physically input by a natural person.
Then, the server 2 verifies the legitimacy of the vibration history information by comparing the vibration history information transmitted from the player terminal 1 with the index information.
As described above, in this embodiment, two types of information sources, vibration history information and operation history information, are used to check the validity of the operation history information after confirming the validity of the vibration history information. The validity is confirmed. That is, the server 2 can verify the legitimacy of the operation history information related to the touch operation that can be easily falsified and counterfeited using the vibration history information verified that the falsification and counterfeiting have not been performed.

  Further, such operation history alteration detection control will be described below with reference to FIGS. 4 and 5.

FIG. 4 is a timing chart of the detection result when the vibration generated by the tap operation on the touch panel of the player terminal 1 is detected by the acceleration sensor (vibration detection unit 31) of the player terminal 1.
In order to implement the operation history alteration detection control of the present embodiment, it is necessary to accurately detect minute vibrations when a touch operation on the touch panel of the player terminal 1 is performed. For this purpose, it is assumed that the acceleration sensor of the player terminal 1 has sufficient resolution. FIG. 4 is a diagram showing a result of verification by the present inventor as to whether or not this premise is satisfied.
Specifically, FIG. 4A is a timing chart when the experimenter holds the player terminal 1 with his hand and performs a tap operation three times. FIG. 4B is a timing chart when the experimenter performs the tap operation three times with the player terminal 1 placed on the desk.
In the example of FIG. 4, the detection result of the acceleration sensor is drawn as an analog continuous curve, but actually, the acceleration value of each axis is acquired every 10 milliseconds. When a general smart phone currently on the market is adopted as the player terminal 1, the acceleration sensor built in it has a measurement frequency of 100 Hz (100 times per second), and is acquired every 10 ms.

As shown in the three ellipse frames in FIG. 4, the three tap operations on the touch panel of the player terminal 1 can be detected as fluctuation (amplitude fluctuation) of the output level (Acceleration) of the acceleration sensor of the player terminal 1. You can see that
It should be noted that at the end of FIGS. 4 (A) and 4 (B) (a waveform with a sample value on the horizontal axis of 300 or later), the minute amplitude fluctuation is repeated due to vibration for the screen capture operation. Yes, unrelated to touch operation.

The maximum difference between the vibration that occurs when the player terminal 1 is held in the hand and the vibration that occurs when the player terminal 1 is fixed on the desk and the tap is operated is the amplitude of the output level of the acceleration sensor. is there.
Specifically, the swing range of the output level of the acceleration sensor when the player terminal 1 is held in the hand in FIG. 4A shows a swing from 0 gal to 200 gal. On the other hand, the swing range of the output level of the acceleration sensor when the player terminal 1 is fixed on the desk and touched in FIG. 4B is 0 gal to 50 gal.
Here, 1 gal is the magnitude of acceleration of 1 centimeter per second (cm / s). Note that the gravitational acceleration generated when the player terminal 1 is dropped is about 981 gal, and it can be seen that the acceleration sensor of the player terminal 1 captures a very fine change in acceleration.

  As described above, in order to accurately detect the premise for carrying out the operation history alteration detection control of the present embodiment, that is, the minute vibration when the touch operation on the touch panel of the player terminal 1 is performed, the acceleration of the player terminal 1 is detected. It was verified that the premise that the sensor has sufficient resolution was established.

FIG. 5 is a diagram for verifying the validity of the operation history information of the player terminal 1 by comparing it with the vibration history information whose validity has been confirmed.
A timing chart (that is, vibration history information) indicating the detection result of the acceleration sensor (vibration detection unit 31) built in the player terminal 1 when the player T performs a tap operation on the touch panel of the player terminal 1 three times is shown in the upper right. The operation history information by the tap operation of the player terminal 1 is shown in the lower right.

The vibration history information (upper right) is composed of respective timing charts of x-axis acceleration, y-axis acceleration, and z-axis acceleration output from the acceleration sensor built in the player terminal 1. In the example of FIG. 5, as in the example of FIG. 4, the vibration history information is drawn as an analog continuous curve, but in reality, the acceleration value of each axis is acquired every 10 milliseconds. Yes. When a general smart phone currently on the market is adopted as the player terminal 1, the acceleration sensor (vibration detection unit 31) incorporated therein has a measurement frequency of 100 Hz (100 times per second), so every 10 ms. Will be acquired. Specifically, for example, the data structure of the vibration history information A is defined as the following equation (1), for example.
A: = {x1, y1, z1, x2, y2, z2,..., Xm, ym, zm} (1)
Here, the acceleration sensor measures acceleration at a constant frequency, and each of xk, yk, zk (k is an integer value of 1 to m) is an x-axis acceleration, y-axis measured at timing k. , And z-axis acceleration, respectively. That is, the timing m indicates the latest measurement result.

The operation history information is information indicating the timing at which the player T performs a touch operation on the player terminal 1.
Specifically, information on an input event including a position on the x axis and a position on the y axis is obtained from the touch panel. Such input event information is stored in the memory of the player terminal 1 or in a secondary storage. For the input event information, information including time information (information indicating when each input event has occurred) is adopted as operation history information. Specifically, for example, the data structure of the operation history information T is defined as in the following formula (2), for example.
A: = {x1, y1, t1, x2, y2, t2,..., Xn, yn, tn} (2)
Here, xp, yp, and tp (p is an integer value of 1 to n) are the x-axis position, the y-axis position, and the time at which these positions are recorded, measured at timing p. Showing each one. As described above, since the history (each element) of the input event information is recorded at the timing input by the user, unlike the vibration history information, the time information recorded for each event is the operation history information. Adopted.

In the vibration history information indicating the detection result of the acceleration sensor of the player terminal 1 (upper right in FIG. 5), regarding the waveform W1 at the first tap, the waveform W2 at the second tap, and the waveform W3 at the third tap, It can be seen that the output level (Acceleration) variation (amplitude variation) of the acceleration sensor is clearly shown. Waveforms W1, W2, and W3 are aggregates of a plurality of element data xk, yk, and zk in the vibration history information A of the above formula (1).
In the operation history information of the player terminal 1 (lower right in FIG. 5), there are event information T indicating the first tap, event information T2 indicating the second tap, and event information T3 indicating the third tap. I understand that. The event information T1, T2, T3 is one element data xp, yp, tp in the operation history information T of the above formula (2).
Here, the time axis (horizontal axis) of the vibration history information A (upper right in FIG. 5) and the operation history information T (lower right in FIG. 5) coincide. Then, the generation timing (position on the time axis) of the waveforms W1, W2, and W3 in the vibration history information A and the generation timing (position on the time axis) of the event information T1, T2, and T3 in the operation history information T ) Is almost the same.
Thus, by comparing the vibration history information A (upper right in FIG. 5) and the operation history information T (lower right in FIG. 5), the correctness of the operation history information T can be determined. It can be seen from A that it can be verified.
In other words, by confirming that the timing at which the acceleration (vibration) change in the vibration history information A occurs and the occurrence timing of the event in the operation history information T are substantially the same, the operation history information T It can be verified that each event to be performed is based on a regular touch operation physically input by a natural person.

The player terminal 1 in FIG. 2 and the server 2 in FIG. 3 have a functional configuration as shown in FIG. 6 in order to execute the operation history alteration detection control described with reference to FIGS.
FIG. 6 is a functional block diagram illustrating an example of a functional configuration for executing the operation history alteration detection control among the functional configurations of the player terminal 1 and the server 2.

As shown in FIG. 6, a transmission control unit 141 and a game execution unit 142 function in the CPU 21 of the player terminal 1.
The game execution unit 142 executes a predetermined game. It is assumed that the game requires a touch operation on the touch panel.
The transmission control unit 141 controls transmission of the vibration history information output from the vibration detection unit 31 from the communication unit 30. The transmission control unit 141 controls transmission of operation history information for the touch panel from the communication unit 30.

As shown in FIG. 6, in the CPU of the server 2, the vibration information acquisition unit 111, the vibration information validity determination unit 112, the operation information acquisition unit 113, the operation information validity determination unit 114, and the index function The generation / update unit 121 and the index function management unit 122 function.
In the storage unit 58 of the server 2, the index function DB 131 functions.

The vibration information acquisition unit 111 acquires vibration history information indicating a time series of detection results of the vibration detection unit 31 of the player terminal 1 from the player terminal 1 via the communication unit 59.
The vibration information validity determination unit 112 determines the validity of the vibration history information acquired by the vibration information acquisition unit 111 based on the index function managed by the index function management unit 122.
Here, the index function is a function that outputs information indicating a determination result as to whether or not the vibration indicated by the vibration history information is a vibration based on a touch operation by a natural person, or information capable of deriving the determination result. Say.
Therefore, any function having such characteristics can be adopted as the index function.
For example, a function that only confirms that the output of the acceleration sensor indicated by the vibration history information does not change linearly may be adopted as the index function.
In addition, since the vibration history information is time-series information of the detection result of the acceleration sensor, a function obtained using a model that defines a feature quantity of acceleration obtained when a natural person has actually performed a touch operation in the past can be obtained. The index function may be employed.
That is, for a set of vibration history information of touch operations by natural persons, a pattern recognition model using supervised learning such as a support vector machine or a machine learning algorithm such as random forest is applied. Thus, a function for identifying vibration history information by a natural person and vibration history information mechanically generated or tampered with may be output, and this function may be adopted as an index function.
That is, an index function may be generated and stored in the index function DB 131 based on vibration history information whose validity has been confirmed among vibration history information obtained in the past.
Note that the index function generation method and generation location are not particularly limited, and in this embodiment, a method generated by the index function generation / update unit 121 provided in the server 2 as described later is employed. Regular and irregular vibration history information collected from the player terminal 1 of the player is stored as so-called big data on the server 2 side, and machine learning for these vibration history big data (motion big data) is targeted. A classification method may be employed. Specifically, in the present embodiment, the vibration information validity determination unit 112 uses the index stored in the index function DB 131 to indicate the value of the acceleration sensor at each timing indicated by the vibration history information acquired by the vibration information acquisition unit 111. Based on the input to the function and the output of the index function, it is confirmed whether or not the value of the acceleration sensor at each timing indicated by the vibration history information is not unnatural as a natural person touch-operated. That is, the vibration history information that is confirmed to be not unnatural as a natural person touch-operated is the vibration history information that is confirmed to be correct.

The operation information acquisition unit 113 acquires operation history information indicating a time series of touch operations of the player terminal 1 from the player terminal 1 via the communication unit 59.
The operation information validity determining unit 114 compares the operation history information acquired by the operation information acquiring unit 113 with the vibration history information determined to be correct by the vibration information validity determining unit 112, so that the operation history is obtained. Determine the legitimacy of the information.
Specifically, the operation information validity determination unit 114 compares the input event history by the touch operation indicated by the operation history information with the value of the acceleration sensor at each timing indicated by the vibration history information whose validity is confirmed, Check that the input event history has not been tampered with.
More specifically, for example, the operation information validity determination unit 114 uses a function for confirming that a change in acceleration corresponding to the time when the touch operation is performed occurs simultaneously with the input history event. It can be confirmed that the history has not been tampered with.

The index function generation / updating unit 121 generates or updates an index function using vibration history information whose validity has been determined in the past.
Specifically, the index function generation / update unit 121 generates or updates an index function based on the acceleration feature amount detected by the natural person's touch operation on the player terminal 1. The method of generation or update is not particularly limited as described above, but it is preferable to employ a method using machine learning or the like so that it can be updated to an appropriate one.
The index function management unit 122 manages the index function generated or updated by the index function generation / updating unit 121 in this manner by accumulating in the index function DB 131.

The functional configuration of the player terminal 1 and the server 2 for realizing the operation history alteration detection control has been described above.
Next, the flow of the operation history alteration detection process executed by the server 2 having such a functional configuration will be described with reference to FIG.
FIG. 7 is a flowchart for explaining the flow of the operation history alteration detection process of the server 2.

In step S <b> 1, the vibration information acquisition unit 111 of the server 2 acquires vibration history information indicating the time series of detection by the vibration detection unit 31 from the player terminal 1.
In step S <b> 2, the operation information acquisition unit 113 acquires operation history information representing the time series of touch operation detection from the player terminal 1.
In step S <b> 3, the vibration information validity determination unit 112 determines the validity of the vibration history information acquired in the process of step S <b> 1 using the index function managed by the index function management unit 122.
In step S4, the vibration information validity determination unit 112 determines whether or not the vibration history information acquired in the process of step S1 is valid based on the determination result of step S3.

If it is determined that the vibration history information is not valid, that is, if it is determined that the vibration history information may have been altered by a program or the like, NO is determined in step S4, and the process Proceed to S7.
In step S <b> 7, the vibration information correctness determination unit 112 executes a request rejection process. The request here means a request for issuing a command by a combination of touch operations specified by the operation history information. Thereafter, the processing proceeds to step S8. The processing after step S8 will be described later.

On the other hand, if it is determined that the vibration history information is valid, YES is determined in step S4, and the process proceeds to step S5.
In step S5, the operation information validity determining unit 114 compares the operation history information acquired in the process of step S2 with the vibration history information determined to be correct in steps S3 and S4.
In step S6, the operation information validity determination unit 114 determines whether or not the operation history information is valid.

When it is determined that the operation history information is not valid, that is, when it is determined that the operation history information may have been altered by a program or the like, it is determined NO in step S6, and the process proceeds to step Proceed to S7.
In step S <b> 7, the vibration information correctness determination unit 112 executes a request rejection process. Thereafter, the processing proceeds to step S8. The processing after step S8 will be described later.

On the other hand, when it is determined that the operation history information is valid, it is determined as YES in Step S6, and when the request is accepted, the process proceeds to Step S8.
In step S8, the CPU 51 of the server 2 determines whether or not there is an instruction to end the process. Here, an instruction to end the process is not particularly limited, but in this embodiment, power-off of the server 2 is adopted. That is, when the power is cut off in the server 2, it is determined as YES in step S8, and the operation history alteration detection process of the server 2 is ended.
In contrast, unless the server 2 is powered off, it is determined NO in step S8, the process returns to step S1, and the subsequent processes are repeated.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within a scope that can achieve the object of the present invention are included in the present invention. is there.

For example, in the above-described embodiment, data that is normally input by a legitimate user and that cannot be easily input by a tamper is targeted for manipulation history tampering detection.
However, the present invention is not particularly limited to this, and can be applied to general purposes for verifying the validity of operation history information for general touch operations. That is, the present invention is not limited to games, and can be widely applied to verification of the legitimacy of touch operations such as smartphones.

For example, in the above-described embodiment, the operation history information of the tap on the player terminal 1 is used as an example for convenience of explanation, but the present invention is not particularly limited thereto.
That is, as described above, if the player terminal 1 is a touch operation on the touch panel, some vibration is generated in the player terminal 1. Therefore, it can be easily applied to verification of operation history information in which arbitrary types of touch operations such as tap, swipe, and flick are arbitrarily combined.

  Further, for example, in the above-described embodiment, an index function obtained using a model that defines a feature amount of acceleration input by a human is employed as information for verifying the validity of vibration history information. However, the present invention is not limited to this, and any information that is an index for determining whether or not the player terminal 1 vibrates based on a touch operation by a natural person is sufficient. Such information is hereinafter referred to as “index information”. That is, the index function is an example of index information.

Further, for example, the functional configuration of FIG. 6 is merely an example, and is not particularly limited. That is, it is sufficient that the information processing apparatus has a function capable of executing the above-described series of processes as a whole, and what functional block is used to realize this function is not particularly limited to the example of FIG. Further, the location of the functional block is not particularly limited to that shown in FIG. For example, the functional block of the server 2 may be transferred to the player terminal 1 or the like, and conversely, the functional block of the terminal 1 may be transferred to the server 2 or the like.
In addition, one functional block may be constituted by hardware alone, software alone, or a combination thereof.

When the processing of each functional block is executed by software, a program constituting the software is installed on a computer or the like from a network or a recording medium.
The computer may be a computer incorporated in dedicated hardware. The computer may be a computer capable of executing various functions by installing various programs, for example, a general-purpose smartphone or personal computer other than a server.

  The recording medium including such a program is not only constituted by a removable medium (not shown) distributed separately from the apparatus main body in order to provide the program to the player, but is also provided to the player in a state of being preinstalled in the apparatus main body. It is composed of a provided recording medium or the like.

In the present specification, the step of describing the program recorded on the recording medium is not limited to the processing performed in time series along the order, but is not necessarily performed in time series, either in parallel or individually. The process to be executed is also included.
Further, in the present specification, the term “system” means an overall apparatus configured by a plurality of devices, a plurality of means, and the like.

In other words, the information processing apparatus to which the present invention is applied can take various embodiments including the server 2 shown in FIG.
That is, the information processing apparatus to which the present invention is applied communicates with the following terminals (for example, the player terminal 1 in FIG. 1) to exchange information.
That is, the terminal
A first detection unit (for example, the vibration detection unit 31 in FIG. 2) that detects vibration generated in the own device;
A display unit (for example, the display unit 27 in FIG. 2) that displays an image on a predetermined display surface;
A second detection unit (for example, the touch operation input unit 26 in FIG. 2) that is stacked on the display surface and detects contact of an object in a predetermined manner;
An execution unit (for example, the game execution unit 142 in FIG. 6) that executes a predetermined process based on the touch operation by the contact of the object;
including.
An information processing apparatus to which the present invention is applied is
First acquisition means (for example, vibration information acquisition unit 111 in FIG. 6) that acquires vibration history information indicating a time series of detection results of the first detection unit from the terminal;
Second acquisition means (for example, the operation information acquisition unit 113 in FIG. 6) for acquiring operation history information indicating the time series of the touch operation from the terminal;
A first determination unit (for example, the operation information validity determination unit 114 in FIG. 6) that determines the validity of the operation history information by comparing the vibration history information and the operation history information;
Is provided.

In this way, in the operation history alteration detection, a method is established that functions effectively even when the alteration detection method becomes known or when the program code that performs the detection itself is the target of alteration.
That is, there is data that is input by a contact operation (touch operation) of an object as data that a regular user inputs naturally and cannot be input easily by a tamper. This touch operation is a general-purpose operation in a smartphone or the like. Therefore, the information processing apparatus to which the present invention is applied detects the manipulation history alteration action or the like (or an action that is likely to do so) by verifying the legitimacy of this general-purpose touch operation event.
Here, when the authorized user naturally performs a touch operation on the terminal, vibration occurs in the terminal. In this case, the vibration history information indicating the time series of the detection result of the first detection unit is observed from the physical phenomenon, and it is difficult to automatically generate accurately from the program. Therefore, in the information processing apparatus to which the present invention is applied, when the above-described configuration is disclosed, the falsification detection method becomes known, or the program code that performs detection on the terminal side is subject to falsification. Even in such a case, it is possible to effectively detect an act of falsifying the operation history.

  Further, if a general smartphone is adopted as the terminal, the user's opt-in operation is not necessary. Specifically, in a general smartphone, the function to detect its orientation is implemented as a basic function of the smartphone, so an acceleration sensor with high resolution is always activated and must be explicitly turned off. I can't. By adopting this acceleration sensor as the first detection unit, it is possible to easily detect falsification of information input for all application software executed on the terminal.

  Furthermore, unlike the prior art, it is possible to improve the operation history alteration detection logic on the information processing apparatus side as a server without changing the terminal side of the client at all. For example, when a new smartphone model is announced as the terminal, operation history alteration detection logic that takes into account the vibration specific to the model can be added to the information processing apparatus (server) side at any point in time. Further, if the server stores the vibration history information as big data, it is possible to detect manipulation history alteration retroactively to past data.

More specifically, by applying the information processing apparatus, it is not necessary to continuously update application software on a terminal having a touch panel such as a smartphone, and the operation history alteration detection on the information processing apparatus side is highly accurate. Can be realized.
That is, a touch operation is used as an operation of application software that operates on a smartphone. This touch operation information has been falsified, and fraud on the application, that is, manipulation history falsification has been a major problem. In particular, in games, tampering of the operation history of easily recording a high score or winning a competition with other players by tampering with the touch operation has been a big problem.
Conventionally, there is a technique for detecting such an operation history falsification act of falsifying such touch operation information. However, in the conventional method, the application software on the terminal having a touch panel such as a smartphone needs to be continuously updated, or the accuracy of detecting fraud on the client remotely from the server side is not high.
Specifically, as a conventional technique, a technique of detecting a modification to game software through a memory scan or the like is well known. Hereinafter, such a conventional method is referred to as a “client-side alteration detection method”. The client-side modification detection method detects cheats for data that can be easily counterfeited by third parties, such as executable files and operation histories. If the user is familiar with programming, create a program to avoid it. Is possible. Therefore, when the client-side modification detection method is adopted, it is necessary to continuously update the application software in accordance with the change of the cheat method.
In addition, as a conventional method, there is a network type cheat detection method of verifying the consistency of data such as operation information transmitted from a game machine or a smartphone as a client to a server. However, the network-type cheat detection method is also easy to avoid because the cheat detection must be performed based on less information than the client-side technology. Therefore, it is difficult for the network type cheat detection method to effectively suppress cheats alone, and it is often used in combination with the client side alteration detection method.
In addition, as a conventional technique, there is a technique using biometric information (biometrics). This conventional method targets data that is difficult to counterfeit, and is a method that can easily distinguish data output by a malicious program from data input by a natural person. However, since the biometric information itself is sensitive privacy information, it is difficult to use it as a general technique for detecting falsification of application software.
Based on the above, using a non-sensitive information source and realizing a tamper detection method that accurately identifies data output by a malicious program and data input by a natural person will realize a fair application and network service usage environment. Above all, it is essential. A technique capable of realizing this is a technique of applying the information processing apparatus as described above.

The information processing apparatus includes:
Management means for managing index information that serves as an index for determining whether or not the terminal vibrates based on the touch operation by a natural person (for example, the index function management unit 122 in FIG. 6);
Second determination means for determining the validity of the vibration history information based on the index information (for example, the vibration information validity determination unit 112 in FIG. 6);
Further comprising
The first determination unit permits execution of the determination of the validity of the operation history information when the validity of the vibration history information is confirmed, and when the validity of the vibration history information is not confirmed, Execution of the validity judgment of the operation history information is prohibited (for example, the vibration information validity judgment unit 112 in FIG. 6),
be able to.

  As described above, the vibration history information indicating the time series of the detection result of the first detection unit is observed from a physical phenomenon, and it is difficult to automatically generate it accurately from a program. However, it is hard to say that it is impossible. Therefore, by introducing a step of determining the legitimacy of the vibration history information, it becomes possible to more reliably detect fraudulent acts such as manipulation history falsification.

Here, based on the one or more pieces of vibration history information whose validity has been confirmed in the past, a generation unit that generates the index information (for example, the index function generation update unit 121 in FIG. 6),
Furthermore, it can be provided.
As a result, the reliability of the index information is increased, and it is possible to more reliably detect fraudulent acts such as manipulation history falsification.
Further, as one or more pieces of vibration history information whose validity has been confirmed in the past, for example, vibration history information of all players is accumulated on the information processing device (server) side, and is stored for each model of each terminal (smartphone or the like). By counting, motion big data such as “machine learning model of natural vibration history information” can be easily generated semi-automatically. This motion big data is data that cannot be measured from the outside, and it becomes possible to more reliably detect fraudulent acts such as manipulation history falsification.

  DESCRIPTION OF SYMBOLS 1, 1-1 thru | or 1-m ... Player terminal, 2 ... Server, 21 ... CPU, 51 ... CPU, 111 ... Vibration information acquisition part, 112 ... Vibration information correctness Judgment unit, 113 ... operation information acquisition unit, 114 ... operation information validity judgment unit, 121 ... index function generation update unit, 122 ... index information management unit, 131 ... index information DB

Claims (5)

A first detection unit for detecting vibrations generated by the own machine;
A display unit for displaying an image on a predetermined display surface;
A second detector that is stacked on the display surface and detects contact of an object in a predetermined manner;
An execution unit that executes predetermined processing based on a touch operation by contact of the object;
A device containing
In an information processing apparatus that communicates and receives information,
First acquisition means for acquiring vibration history information indicating a time series of detection results of the first detection unit from the terminal;
Second acquisition means for acquiring operation history information indicating a time series of the touch operation from the terminal;
First determination means for determining the legitimacy of the operation history information by comparing the vibration history information and the operation history information;
An information processing apparatus comprising: Management means for managing index information that serves as an index for determining whether or not the terminal vibrates based on the touch operation by a natural person;
Second determination means for determining validity of the vibration history information based on the index information;
Further comprising
The first determination unit permits execution of the determination of the validity of the operation history information when the validity of the vibration history information is confirmed, and when the validity of the vibration history information is not confirmed, Prohibit execution of validity judgment of operation history information,
The information processing apparatus according to claim 1. Generating means for generating the index information based on the one or more vibration history information whose validity has been confirmed in the past;
The information processing apparatus according to claim 2, further comprising: A first detection unit for detecting vibrations generated by the own machine;
A display unit for displaying an image on a predetermined display surface;
A second detector that is stacked on the display surface and detects contact of an object in a predetermined manner;
An execution unit that executes predetermined processing based on a touch operation by contact of the object;
A device containing
In an information processing method executed by an information processing apparatus that communicates and receives information,
A first acquisition step of acquiring vibration history information indicating a time series of detection results of the first detection unit from the terminal;
A second acquisition step of acquiring operation history information indicating the time series of the touch operation from the terminal;
A determination step of determining the legitimacy of the operation history information by comparing the vibration history information and the operation history information;
An information processing method including: A first detection unit for detecting vibrations generated by the own machine;
A display unit for displaying an image on a predetermined display surface;
A second detector that is stacked on the display surface and detects contact of an object in a predetermined manner;
An execution unit that executes predetermined processing based on a touch operation by contact of the object;
A device containing
To the computer that controls the server that communicates and exchanges information,
A first acquisition step of acquiring vibration history information indicating a time series of detection results of the first detection unit from the terminal;
A second acquisition step of acquiring operation history information indicating the time series of the touch operation from the terminal;
A determination step of determining the legitimacy of the operation history information by comparing the vibration history information and the operation history information;
A program that executes control processing including

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