JP5006897B2 - Password judgment device - Google Patents

Description

  The present invention relates to, for example, a technique for determining a password (password) in an ATM (Automated Teller Machine) such as a bank or an Internet bank, and a technique for displaying a password input screen.

  Conventionally, an ATM password has a numerical value of 4 digits and has low security strength. Therefore, the security strength is improved by using biometric authentication. However, many costs are required to introduce biometric authentication. In addition, some users have disgust about biometric authentication. Therefore, in many cases, biometric authentication is not used, and conventional authentication methods are continuously used.

In addition to biometric authentication, the security strength is improved by using a one-time password or increasing the number of digits entered for the password.
Patent Documents 1 and 2 describe not only numerical values but also password input methods using colors.

Japanese Patent Laid-Open No. 9-212459 Japanese Patent Application Laid-Open No. 2002-287871

As described above, biometric authentication is costly to introduce and difficult to accept by users. In addition, it is necessary to distribute a dedicated device to the user for the one-time password, which is expensive to introduce as in the case of biometric authentication. In addition, increasing the number of input digits of a password requires a user to memorize a password with an increased number of digits, although the security strength is not improved so much, and the burden on the user is large.
An object of the present invention is, for example, to increase the security strength while suppressing the introduction cost and the burden on the user.

The password determination device according to the present invention is, for example,
A plurality of character information arranged in a predetermined arrangement is displayed on the display device, and a predetermined background image information selected from the plurality of background image information is displayed on the display device as a background of each character information of the plurality of character information. An input button display unit for displaying on the display device an input button array in which input buttons on which background image information is displayed as a background of character information are arranged in the predetermined array;
A password storage unit that stores a password indicating character information and background image information in a storage device;
When an input button of the input button array displayed by the input button display unit is selected, a character background specifying unit that specifies character information and background image information constituting the selected input button;
A determination unit that determines whether or not the character information and background image information indicated by the password stored in the password storage unit matches the character information and background image information specified by the character background specifying unit by the processing device; It is characterized by that.

The input button display unit changes background image information to be displayed as a background of at least some character information of the plurality of character information each time the input button array is displayed.

The input button display unit displays the input button array in a partial area of the display area of the display device, and each time the input button array is displayed, the input button array is displayed in a different area of the display area. Is displayed.

The input button display unit transmits the character information and background image information to be displayed as a background of the character information to the display device as different image data, and the transmitted image data of the character information and the background image Information image data is displayed on the display device in an overlapping manner.

The character background specifying unit acquires position information of the selected input button from the display device, and specifies character information and background image information constituting the input button from the acquired position information.

The input button display unit displays a plurality of pieces of character information including the same character information.
The password determination device further includes:
An identification information acquisition unit for acquiring user identification information;
A character array storage unit that stores an array of character information in a storage device for each user identification information;
Based on the identification information acquired by the identification information acquisition unit, an array search unit that searches the processing device for an array of character information stored in the character array storage unit,
The input button display unit displays background image information superimposed on character information arranged in the array searched by the array search unit.

The password determination program according to the present invention is, for example,
A plurality of character information arranged in a predetermined arrangement is displayed on a display device, and a predetermined background image information selected from a plurality of background image information is overlapped as a background of each character information of the plurality of character information. An input button display process for displaying an input button array in which input buttons displayed with background image information superimposed as a background of character information are arranged in the predetermined array,
When the input button of the input button array displayed in the input button display process is selected, the character background specifying process for specifying the character information and the background image information constituting the selected input button;
Character information and background image information indicated by a password stored in advance and a determination process for determining whether or not the character information and background image information specified in the character background specifying process match, To do.

An input screen display device according to the present invention is, for example,
An input screen display device that displays a password input screen,
A character information display unit for displaying a plurality of character information in a predetermined arrangement;
The background image information is displayed as the background of the character information by displaying predetermined background image information selected from the plurality of background image information as the background of each character information of the plurality of character information displayed by the character information display unit. And a background image information display unit for displaying an input button array in which the input buttons are arranged in the predetermined array.

The background image information display unit changes background image information to be displayed as a background of at least some character information of the plurality of character information each time the input button array is displayed.

The background image information display unit displays the input button array in a part of a display area of the display device, and each time the input button array is displayed, the input button array is displayed in a different area of the display area. An array is displayed.

An input screen display program according to the present invention is, for example,
An input screen display program that displays a password input screen.
A character information display process for displaying a plurality of character information in a predetermined arrangement;
The background image information as the background of the character information is displayed by overlapping the predetermined background image information selected from the plurality of background image information as the background of each character information of the plurality of character information displayed in the character information display processing. And a background image information display process for displaying an input button array in which input buttons displayed in a superimposed manner are arranged in the predetermined array.

  The password determination device according to the present invention arranges input buttons on which background image information is superimposed as a background of character information and displays them as an input button array. Then, the displayed input button array is operated to input a password indicating character information and background image information. Since the password indicates character information and background information, the security strength is higher than when a password indicating only character information is used. In addition, there is no need to distribute a dedicated device for each user, and there is no introduction cost.

The figure which shows an example of the password determination system. The figure which shows an example of the password determination system. The figure which shows an example of the input button arrangement | sequence 30. Explanatory drawing of the password input method using the input button arrangement | sequence 30. FIG. FIG. 2 is a functional block diagram showing functions of a password determination system 100. 5 is a flowchart showing the operation of the password determination system 100. The figure which shows an example of the information which the character arrangement memory | storage part 13 memorize | stores. The figure which shows an example of the information which the password memory | storage part 16 memorize | stores. The figure which shows an example of the image data 31 of character information. The figure which shows an example of the image data 32 of background image information. Explanatory drawing of the positional information on an input button. The figure which shows an example of the hardware constitutions of the password determination apparatus 10 and the input screen display apparatus 20. FIG.

Embodiment 1 FIG.
A password determination system 100 including the password determination device 10 and the input screen display device 20 will be described.
The password in the password determination system 100 is composed of a permutation of information indicating character information and image information. Here, description will be made assuming that the character information is a numerical value from 0 to 9.
For example, the password in the password determination system 100 includes a set of character information “1” and image information “A” (set 1), a set of character information “2” and image information “B” (set 2), and character information. Permutation “set 1 → set 2 → set 3 → set 4” of a set of “3” and image information “C” (set 3) and a set of character information “4” and image information “D” (set 4) Consists of. That is, when “set 1” is input first, “set 2” is input next, “set 3” is input next, and “set 4” is input last, the password determination system 100 Be authenticated.

First, an example of the password determination system 100 will be described.
FIG. 1 is a diagram illustrating an example of a password determination system 100.
In FIG. 1, the password determination system 100 includes a host 1 and an ATM 2. The host 1 is an example of the password determination device 10. ATM 2 is an example of the input screen display device 20. In FIG. 1, only one ATM 2 is shown, but a plurality of ATMs 2 may be provided.
For example, when a user performs a transfer process or the like using ATM 2, the user inserts a cash card from the card reader 3 and operates a password input screen displayed on the display unit 4 to enter the password. Enter. The user identification information stored in the cash card and the input password are transmitted to the host 1. If the transmitted identification information and password match a set of identification information and password registered in advance in the host 1, authentication is performed and a transfer process or the like can be performed.
Here, in the password determination system 100, the password input screen displayed on the display unit 4 is transmitted from the host 1. In particular, the input screen displayed on the display unit 4 is a preset input screen that is different for each user. That is, the host 1 displays an input screen on the ATM 2 in accordance with the user identification information stored in the cash card.

FIG. 2 is a diagram illustrating an example of the password determination system 100.
In FIG. 2, the password determination system 100 includes a server 5 and a PC 6 (Personal Computer). The server 5 is an example of the password determination device 10. The PC 6 is an example of the input screen display device 20. In FIG. 2, only one PC 6 is shown, but a plurality of PCs 6 may be provided.
For example, when the user logs in to the system provided by the server 5 using the PC 6, the user operates the identification information input screen and the password input screen displayed on the display unit 7 of the PC 6, Enter the user's identification information and password. The input identification information and password are transmitted to the server 5. If the transmitted identification information and password match a set of identification information and password registered in advance in the server 5, authentication is performed and the system provided by the server 5 can be logged in.
If the system provided by the server 5 is an Internet bank system, the user can log in to the Internet bank system using the PC 6. In the Internet bank system, when performing a transfer process, it may be required to enter a password different from that used when logging into the system. Also in this case, as in the case of logging in to the system, the user operates the input screen displayed on the display unit 7 of the PC 6 and inputs the password. The entered password is transmitted to the server 5. If the transmitted password matches the password registered in advance in the server 5, the password is authenticated and transfer processing can be performed.
As in the case of FIG. 1, in the password determination system 100, the password input screen displayed on the display unit 7 is transmitted from the server 5. In particular, the input screen displayed on the display unit 7 is a preset input screen that is different for each user. For example, when logging in to the system, the server 5 first displays an identification information input screen to input identification information. Then, the server 5 displays an input screen on the PC 6 according to the input identification information. Further, in the case of performing a transfer process in the Internet bank system, the server 5 displays an input screen on the PC 6 according to the identification information acquired at the time of login.

Next, a password input screen displayed on the input screen display device 20 by the password determination device 10 will be described.
FIG. 3 is a diagram illustrating an example of the input button array 30 displayed on the password input screen.
In the input button array 30 shown in FIG. 3, character information from 0 to 9 is displayed in 48 squares of 6 rows × 8 columns. In addition, in each character information, one background image information selected from a plurality of background image information (here, seven background image information from A to G) is displayed.
Each square of 48 squares is an input button. That is, each square on which background image information is displayed as the background of the character information is an input button. The user selects an input button and inputs a password.
Each input button is indicated by an input button (row number, column number). For example, in the case of the input button (1, 1), the background image information “E” is displayed in the character information “2”. The input button (1, 2) is an input button in which the background image information “B” is displayed in the character information “0”.
In FIG. 3, since there are 48 squares, at least a part of the character information from 0 to 9 is displayed redundantly. For example, “0” is displayed at five locations.
There may be a plurality of input buttons in which the same background information is displayed in the same character information. For example, the input button (1, 8) and the input button (2, 1) are both input buttons in which the background image information “C” is displayed in the character information “9”.

FIG. 4 is an explanatory diagram of a password input method using the input button array 30 shown in FIG. Here, it is assumed that the password is the above-described permutation “set 1 → set 2 → set 3 → set 4”.
The user first selects the input button (1, 7) or the input button (3, 5) as shown in FIG. 4 (b) from the input button array 30 shown in FIG. 4 (a). Next, as shown in FIG. 4C, the input buttons (4, 7) are selected. Next, as shown in FIG. 4D, the input button (1, 3) or the input button (4, 3) is selected. Finally, as shown in FIG. 4E, the input button (2, 8) is selected.
Then, the permutation “set 1 → set 2 → set 3 → set 4” is input. Then, information input from the input screen display device 20 to the password determination device 10 is transmitted and authenticated by the password determination device 10.

Next, functions and operations of the password determination system 100 will be described.
FIG. 5 is a functional block diagram illustrating functions of the password determination system 100.

The password determination device 10 includes an identification information acquisition unit 11, an array search unit 12, a character array storage unit 13, an input button display unit 14, a character background identification unit 15, a password storage unit 16, and a determination unit 17.
The input screen display device 20 includes an identification information input unit 21, a character information display unit 22, a background image information display unit 23, and an input button selection unit 24.

FIG. 6 is a flowchart showing the operation of the password determination system 100.
As a premise of the process shown in FIG. 6, the character arrangement storage unit 13 of the password determination device 10 stores an arrangement of character information in advance in the storage device for each user identification information as shown in FIG. 7. . The character information array is information defining the arrangement order of character information.
Further, as a premise of the process shown in FIG. 6, the password storage unit 16 of the password determination device 10 stores a password indicating character information and background image information in advance in the storage device for each identification information as shown in FIG. is doing.

(S1: Identification information input process (identification information acquisition process))
The identification information input unit 21 causes the user to input identification information, and transmits the input identification information to the password determination device 10 via the network.
For example, in the example shown in FIG. 1, the identification information input unit 21 reads user identification information from a cash card or the like inserted into the card reader 3 and transmits the read identification information to the password determination device 10. . In the example shown in FIG. 2, the identification information input unit 21 causes the identification information to be input to the input field displayed on the display unit 7 using the keyboard of the PC 6 and the like, and the input identification information is input to the password determination device 10. Send.
And the identification information acquisition part 11 acquires the identification information which the identification information input part 21 transmitted via a network.

(S2: Sequence search process)
The sequence search unit 12 acquires the sequence of character information corresponding to the identification information by searching the character sequence storage unit 13 with the processing device using the identification information acquired by the identification information acquisition unit 11 as a search key.

(S3: Character image generation process)
The input button display unit 14 generates image data in which character information is arranged (image data 31 of character information) by the processing device in accordance with the character information array acquired by the array search unit 12.
FIG. 9 is a diagram illustrating an example of the image data 31 of character information.

(S4: Background image generation process)
The input button display unit 14 generates image data 32 of background image information to be displayed as a background of the image data 31 of character information by the processing device. In particular, the input button display unit 14 generates the image data 32 of the background image information so that the background image information selected from the plurality of background image information is displayed on the background of each character in the image data 31 of the character information. .
FIG. 10 is a diagram illustrating an example of the image data 32 of the background image information.
The input button display unit 14 generates the image data 32 of the background image information so that the input buttons necessary for inputting the password are always included in the input button array 30. That is, the input button display unit 14 includes a set of character information and background image information forming a password stored in the password storage unit 16 corresponding to the identification information acquired by the identification information acquisition unit 11 as an input button. To be.

(S5: Image data transmission process)
The input button display unit 14 transmits the generated image data 31 of character information and image data 32 of background image information to the input screen display device 20 via the network. Then, an input button array 30 in which the image data 31 of character information and the image data 32 of background image information are overlapped is displayed on the input screen display device 20.
That is, the input button display unit 14 transmits the image data 31 of character information and the image data 32 of background image information to the input screen display device 20 as different (separate) data.

  Note that (S3) to (S5) are referred to as input button display processing.

(S6: Image data display process)
The character information display unit 22 displays the image data 31 of the character information transmitted by the input button display unit 14 on the display device (character information display process).
Further, the background image information display unit 23 displays the image data 32 of the background image information transmitted from the input button display unit 14 so as to overlap the image data 31 of the character information displayed by the character information display unit 22 (background image information). Display processing). In particular, the background image information display unit 23 stores the background image information so that each character information in the image data 31 of the character information displayed by the character information display unit 22 overlaps each character information in the image data 32 of the background image information. The image data 32 is displayed.
When the character information display unit 22 displays the image data 31 of the character information shown in FIG. 9 and the background image information display unit 23 displays the image data 32 of the background image information shown in FIG. 10, the input button arrangement shown in FIG. 30 will be displayed.
For example, in the example shown in FIG. 1, the character information display unit 22 and the background image information display unit 23 display the image data 31 of character information and the image data 32 of background image information on the display unit 4 of ATM2. . In the example shown in FIG. 2, the character information display unit 22 and the background image information display unit 23 display the image data 31 of the character information and the image data 32 of the background image information on the display unit 7 of the PC 6. .

(S7: Input button selection process)
The input button selection unit 24 causes the user to select the input button array 30 displayed on the display device, and inputs the password. The input button selection unit 24 transmits information on the input button selected by the user to the password determination device 10 via the network. Here, the input button selection unit 24 transmits the position information of the input button selected by the user to the password determination device 10.

FIG. 11 is an explanatory diagram of the position information of the input button.
For example, the coordinates of a predetermined position (for example, the lower left corner) of the selected input button when a predetermined corner (the lower left corner in FIG. 11) of the display device 40 is the origin (0, 0). The value is the position information of the input button. For example, in the case of the character information [3] of the input button (1, 3) and the position information of the background image information “C”, (xn, yn) shown in FIG.
It is assumed that the display position of the input button array 30 in the display area 40 is specified by the input button display unit 14. For example, it is assumed that the coordinate value (x1, y1) of the corner of the input button array 30 (lower left corner in FIG. 11) is designated by the input button display unit 14.

(S8: Character background specifying process)
The character background specifying unit 15 acquires the position information of the input button selected by the user transmitted by the input button selection unit 24 via the network. Then, from the position information of the input button selected by the user, a set of character information and background image information constituting the selected input button is specified by the processing device, and the input password is specified.
This can be easily calculated from the coordinate value (x1, y1), the image data 31 of character information, and the image data 32 of background image information.

(S9: Password determination process)
The determination unit 17 determines whether or not the password specified by the character background specifying unit 15 matches the password stored in advance by the password storage unit 16. That is, the determination unit 17 searches the password from the password storage unit 16 using the processing device using the identification information acquired in (S1) as a search key, and acquires a password corresponding to the identification information. Then, the determination unit 17 determines whether or not the password specified by the character background specifying unit 15 matches the password acquired from the password storage unit 16.
The determination unit 17 authenticates the user when the passwords match. On the other hand, if the passwords do not match, the user is not authenticated.

  As described above, the password determination device 10 causes the input screen display device 20 to display the input button array 30 in which the input buttons displaying the background image information as the background of the character information are arranged. The input screen display device 20 inputs a password which is a permutation of a set of character information and background image information by selecting an input button from the displayed input button array 30. The password determination device 10 determines whether to authenticate based on the input password.

  In the password determination system 100, the password is not a permutation of character information as in the prior art, but a permutation of a set of character information and background image information. For this reason, password information is increased and security strength is higher than in the past.

Further, conventionally, there is a case where the password is leaked from the position of the selected input button when it is looked into from behind in ATM 2 or the like. However, the input button array 30 displayed as the password input screen has a larger number of input buttons than the general input button array in which 10 numerical values from 0 to 9 are displayed. Therefore, it is difficult for the password to be leaked by looking into it.
Further, every time the input button array 30 is displayed, part or all of the background image information may be changed. By changing the background image information, the position of the input button to be selected every time is changed even when the same user inputs the same password. For this reason, it is possible to prevent the password from being leaked by looking into it.
Note that the arrangement of the character information is determined for each user and is not changed in principle (for example, the arrangement of the character information is changed only when a change instruction is given from the user). Therefore, the user can memorize | store the arrangement | sequence of character information gradually. Therefore, as the password is input, the password can be easily input, and the burden on the user is reduced.

  In (S5), the input button display unit 14 transmits the image data 31 of character information and the image data 32 of background image information to the input screen display device 20 as separate data. Therefore, even if a third party acquires the image data 31 of character information flowing through the network and the image data 32 of background image information, the input button array 30 is difficult to leak. As described above, when background image information is displayed every time the input button array 30 is displayed, the input button array 30 is particularly difficult to leak.

  Also, in (S6), the input button selection unit 24 does not transmit the character information and background image information of the selected input button to the password determination device 10, but uses the position information of the selected input button as the password determination device 10. Send to. Therefore, even when a third party acquires data transmitted from the input screen display device 20 to the password determination device 10, it is difficult for the third party to leak the password.

  The input button display unit 14 may change the display position of the input button array 30 in the display area 40 every time the input button array 30 is displayed. That is, the input button array 30 may be displayed in a different area of the display area 40 each time the input button array 30 is displayed. Thus, even if the third party acquires the position information flowing through the network and the image data 31 of the character information and the image data 32 of the background image information, the third party specifies the selected input button. Can not do it. Therefore, it is difficult for the password to be leaked to a third party.

The input button selection unit 24 may newly establish a connection with the password determination device 10 and transmit the position information of the selected input button every time the user selects the input button. That is, only one input button information may be transmitted in one connection. For example, if AJAX (Asynchronous JavaScript + XML) or the like is used, a new connection with the password determination device 10 can be established each time the user selects an input button.
This makes it difficult for the third party to recognize the selected input button as a series of passwords even if the third party acquires data flowing through the network. As a result, passwords are difficult to leak.

In the example shown in FIG. 1, a conventional password (password) and a conventional card such as a cash card can be used as they are. Therefore, the cost for introduction can be suppressed.
When shifting from the conventional system to the password determination system 100, the user who uses the password determination system 100 for the first time after shifting to the password determination system 100, background image information combined with each character information of the password used conventionally Select. Thereby, the password determination by the password determination system 100 will be performed from the next time. That is, even during system migration, the user only selects background image information to be used, and the burden on the user is small. For example, if the background image information of all character information is the same background image information, the burden on the user is very small.
In addition, it is also possible to prompt the user to change the background image information combined with each character information at the timing when the user is prompted to change the password. Further, it is possible to prompt the user to change the background image information every time after password authentication.

  Further, when the password determination system 100 is introduced in a bank or the like, the password determination processing is common between the system of the host 1 and ATM 2 (example shown in FIG. 1) and the Internet bank system (example shown in FIG. 2). Can be Therefore, the cost for introduction can be suppressed.

In the above description, the character information is a numerical value from 0 to 9. However, the character information is not limited to a numerical value from 0 to 9, and may be other character information such as alphabets, hiragana characters, and symbols.
In the above description, at least a part of the character information is displayed in an overlapping manner. However, different character information may be displayed on all squares.
In the above description, the background image information is image information on which a predetermined pattern is drawn. However, the background image information may be monochromatic image information, for example. In this case, a predetermined color is displayed as the background of each character information.
In the above description, the password is composed of a permutation of information indicating character information and image information. However, the password may be composed of a combination of information indicating character information and image information. That is, the password may be configured so that the input order of the set of character information and image information does not matter.

Next, the hardware configuration of the password determination device 10 and the input screen display device 20 in the embodiment will be described.
FIG. 12 is a diagram illustrating an example of a hardware configuration of the password determination device 10 and the input screen display device 20.
As shown in FIG. 12, the password determination device 10 and the input screen display device 20 are also referred to as a CPU 911 (Central Processing Unit, central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, processor for executing a program. ). The CPU 911 is connected to the ROM 913, the RAM 914, the LCD 901 (Liquid Crystal Display), the keyboard 902 (K / B), the communication board 915, and the magnetic disk device 920 via the bus 912, and controls these hardware devices. Instead of the magnetic disk device 920 (fixed disk device), a storage device such as an optical disk device or a memory card read / write device may be used. The magnetic disk device 920 is connected via a predetermined fixed disk interface.

  An operating system 921 (OS), a window system 922, a program group 923, and a file group 924 are stored in the magnetic disk device 920 or the ROM 913. The programs in the program group 923 are executed by the CPU 911, the operating system 921, and the window system 922.

The program group 923 includes “identification information acquisition unit 11”, “sequence search unit 12”, “character sequence storage unit 13”, “input button display unit 14”, “character background specifying unit 15”, “ The functions described as “password storage unit 16”, “determination unit 17”, “identification information input unit 21”, “character information display unit 22”, “background image information display unit 23”, “input button selection unit 24”, etc. It stores software, programs to be executed, and other programs. The program is read and executed by the CPU 911.
The file group 924 includes information such as “character information”, “background image information”, “character information array”, “password”, and “position information” in the above description, data, signal values, variable values, and parameters. , “File” and “database” are stored as items. The “file” and “database” are stored in a recording medium such as a disk or a memory. Information, data, signal values, variable values, and parameters stored in a storage medium such as a disk or memory are read out to the main memory or cache memory by the CPU 911 via a read / write circuit, and extracted, searched, referenced, compared, and calculated. Used for the operation of the CPU 911 such as calculation / processing / output / printing / display. Information, data, signal values, variable values, and parameters are temporarily stored in the main memory, cache memory, and buffer memory during the operation of the CPU 911 for extraction, search, reference, comparison, calculation, calculation, processing, output, printing, and display. Is remembered.

In the above description, the arrows in the flowchart mainly indicate input / output of data and signals, and the data and signal values are recorded in a memory of the RAM 914, other recording media such as an optical disk, and an IC chip. Data and signals are transmitted online by a bus 912, signal lines, cables, other transmission media, and radio waves.
In addition, what is described as “to part” in the above description may be “to circuit”, “to device”, “to device”, “to means”, and “to function”. It may be “step”, “˜procedure”, “˜processing”. In addition, what is described as “˜device” may be “˜circuit”, “˜device”, “˜device”, “˜means”, “˜function”, and “˜step”, “ ~ Procedure "," ~ process ". Furthermore, what is described as “to process” may be “to step”. That is, what is described as “˜unit” may be realized by firmware stored in the ROM 913. Alternatively, it may be implemented only by software, or only by hardware such as elements, devices, substrates, and wirings, by a combination of software and hardware, or by a combination of firmware. Firmware and software are stored in a recording medium such as ROM 913 as a program. The program is read by the CPU 911 and executed by the CPU 911. That is, the program causes a computer or the like to function as the “˜unit” described above. Alternatively, the computer or the like is caused to execute the procedures and methods of “to part” described above.

  1 host, 2 ATM, 3 card reader, 4,7 display unit, 5 server, 6 PC, 10 password determination device, 11 identification information acquisition unit, 12 sequence search unit, 13 character sequence storage unit, 14 input button display unit , 15 character background specifying unit, 16 password storage unit, 17 determination unit, 20 input screen display device, 21 identification information input unit, 22 character information display unit, 23 background image information display unit, 24 input button selection unit, 30 input button Array, 31 Character data image data, 32 Background image information image data, 100 Password determination system.

Claims (4)

A plurality of character information arranged in a predetermined arrangement is displayed on a display device, and predetermined image information selected from the plurality of image information is displayed as background image information as a background of each character information of the plurality of character information. by displaying on, an input button display unit for displaying an input button array obtained by arranging an input button background image information is displayed as a background of the character information to the predetermined sequence on the display device, each of said character information The image information arranged in the predetermined array and the background image information to be displayed as the background of the character information are transmitted to the display device as different image data and the image information arranged in the predetermined array are transmitted. An input button display unit that displays image data of character information and image data of the background image information on the display device ;
A password storage unit that stores a password indicating character information and background image information in a storage device;
When an input button of the input button array displayed by the input button display unit is selected, a character background specifying unit that specifies character information and background image information constituting the selected input button;
A determination unit that determines whether or not the character information and background image information indicated by the password stored in the password storage unit matches the character information and background image information specified by the character background specifying unit by the processing device; ,
When displaying the input button arrangement, the input button display unit does not change the arrangement of the plurality of character information arranged in the predetermined arrangement, and does not change at least a part of the character information of the plurality of character information. A password determination apparatus characterized by changing background image information to be displayed as a background. The input button display unit displays the input button array in a partial area of the display area of the display device, and each time the input button array is displayed, the input button array is displayed in a different area of the display area. The password determination device according to claim 1, wherein the password is displayed. The character background specifying unit acquires position information of a selected input button from the display device, and specifies character information and background image information constituting the input button from the acquired position information. Item 3. A password determination device according to item 1 or 2 . The password determination device further includes:
An identification information acquisition unit for acquiring user identification information;
A character array storage unit that stores an array of character information in a storage device for each user identification information;
Based on the identification information acquired by the identification information acquisition unit, an array search unit that searches the processing device for an array of character information stored in the character array storage unit,
The input button display section, the password determination apparatus according to claim 1, wherein the sequence search unit is equal to or to be displayed superimposed background image information into character information arranged in sequence searched to 3.

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