JP5115749B2 - Key input device and key input method - Google Patents

Description

  The present invention relates to a key input device to which information requiring confidentiality is input.

  In recent years, with the spread of credit cards and point cards for each store, there are increasing opportunities to enter a personal identification number (PIN) in a public place. A key input device for inputting a password, such as a credit card payment terminal or a PIN pad for inputting the password, is required to protect the password from leaking. In particular, when a user inputs a personal identification number, there is a high risk of leakage due to a third party in the vicinity stealing the input operation, and various measures are taken to prevent this.

  For example, as one of the countermeasures, there is one in which a key input unit is attached to a key input unit to prevent a third party from seeing the password when the user inputs the password. However, with this configuration, there is a possibility that the order of key input is inferred from the arrangement of the keys and the movement of the hand or finger, and the password is determined.

  Patent Document 1 proposes a method for preventing the leakage of a personal identification number by using a liquid crystal display with a touch panel as a keyboard for inputting the personal identification number, and changing the numeric keypad arrangement when inputting the personal identification number. In Patent Document 1, the user is required to input a personal identification number after changing the numeric keypad arrangement. Even if a third party steals the movement of the user's hand or finger, the arrangement of the key is not known, so that the risk of leaking the personal identification number is reduced.

Japanese Patent Laid-Open No. 11-161749

  In Patent Document 1 described above, a display device having a touch panel function is required, which increases the cost of the device. Moreover, in order to specify the position designated by the fingertip, a touch panel screen having a predetermined size is required, and it is difficult to reduce the size of the apparatus. There is a method of using a stylus pen so that a small touch panel screen can be used. However, when a payment terminal or the like is carried with the user, it is necessary to always carry the stylus pen with the user, which is not convenient.

  An object of the present invention is to provide a technique for preventing leakage of input information while suppressing the size and cost of the device in a key input device to which information requiring confidentiality is input.

In order to achieve the above object, a key input device of the present invention has a plurality of keys in a predetermined arrangement, and generates a key for generating operation key information representing the operated key when a user performs a key operation. Input information that includes an input unit and a plurality of display portions corresponding to each of the plurality of keys of the key input unit, and to be recognized by operating the key corresponding to the display portion in each of the display portions And a table representing the correspondence between each of the plurality of keys and the input information to be recognized when the key is operated, and is operated by the key input unit. When the key information is generated, based on the table, it is recognized that the input information corresponding to the key represented by the operation key information has been input, and the table corresponding to the key is displayed on the display unit. Have a control unit for changing the display part, the display of the change of the display portion is to display the operation key information generated by the key input unit around the input information shown in the display portion .

In order to achieve the above object, a key input method of the present invention is a key input method of a key input device having a key input unit having a plurality of keys in a predetermined arrangement, a display unit, and a control unit. The control unit holds a table representing a correspondence relationship between each of the plurality of keys and input information to be recognized when the key is operated, and the display unit receives the key input Including a plurality of display portions corresponding to each of the plurality of keys of a portion, and displaying each of the display portions describing input information to be recognized by operating a key corresponding to the display portion, When the key input unit performs a key operation by a user, the key input unit generates operation key information representing the operated key. When the control unit generates the operation key information by the key input unit, the table Based on , While recognizing that the input information corresponding to the key represented by the manipulation key information is entered, on the display unit, a shall alter the display of the display portion corresponding to the key, the display portion The change of the display is to display the operation key information generated by the key input unit around the input information shown in the display portion .

  According to the present invention, in a key input device to which information requiring confidentiality is input, it is possible to prevent leakage of input information while suppressing the size and cost of the device.

It is a block diagram which shows the structure of the key input device in one Embodiment of this invention. It is a flowchart which shows a process when the control part 3 shown in FIG. 1 acquires input information. It is a figure which shows the example of the key arrangement | positioning of the key input part 1 shown in FIG. 1, and the operation key information produced | generated when each key is operated. It is a figure which shows the example of arrangement | positioning and key position of the key of the key input part 1 shown in FIG. It is a figure which shows the example of the conversion table of the key position of each key, operation information, and input information. It is a figure which shows the example of arrangement | positioning of a key allocation table, and each input information. It is a figure which shows the example of the position corresponding to arrangement | positioning of a key allocation table, and the key position of the key input part 1. FIG. It is a figure which shows the relationship between a PIN code, a key position, and the key which a user should press. It is a figure explaining the method to change the character color of a key allocation table. It is a figure explaining the method to change the background color of a key allocation table. It is a figure explaining the method of displaying a predetermined symbol around the character of a key allocation table. It is a figure explaining the method of displaying an input key around the character of a key allocation table. It is a figure explaining the method of displaying an input key instead of the character of a key allocation table. It is a figure explaining the method of inverting the character color and background color of a key allocation table.

  Next, the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of a key input device according to an embodiment of the present invention.

  The key input device is a device to which information requiring confidentiality is input. The key input device has a function of authenticating a personal identification number input by the user, for example.

  As shown in FIG. 1, the key input device includes a key input unit 1, a display unit 2, and a control unit 3.

  The key input unit 1 is an input device having a plurality of keys in a predetermined arrangement. When the user performs a key operation, the key input unit 1 generates operation key information indicating the operated key. Note that examples of key operations include key pressing. FIG. 3A shows an example of key arrangement of the key input unit 1 and operation key information generated when each key is operated. Further, FIG. 3b shows an example of the key position indicating the key arrangement of the key input unit 1 and the position of each key. In the example shown in FIGS. 3a and 3b, the keys are arranged in 4 rows and 3 columns. The key positions of the keys of the key input unit 1 are indicated by “A” to “L”. When each key is pressed, “1” to “9”, “cancel”, “0”, and “confirm” Input information is generated. The key input device according to the present embodiment enables key input using the key arrangement displayed on the display unit 2. For example, if the key input device is dedicated to such key input, Nothing may be imprinted on the key top of the key of the key input unit 1. If this key input device is also used for key input with a key layout displayed on the key top as usual, “1” to “9”, “Cancel”, “0” and “ Characters such as “confirmed” may be engraved.

  The control unit 3 converts the operation key information acquired from the key input unit 1 into a predetermined value (hereinafter referred to as input information).

  The operation key information is information corresponding to each key of the key input unit 1 and is an array having the same number of elements as the keys of the key input unit 1. The input information is information corresponding to each operation information, and is an array having the same number of elements as the operation information. The array of input information is obtained by randomly rearranging the array of operation information. FIG. 4 shows a conversion table, which is a table showing the key position of each key, operation information, and input information. In the example shown in FIG. 4, the values of the operation information and the input information are the same for “5” and “confirmed”, but it may be allowed that the values of the operation information and the input information are the same. However, the values of the operation information and the input information may be limited to be different. Also, “cancel” and “confirm” may be subject to rearrangement, and “cancel” and “confirm” may not be symmetric in the rearrangement.

  In addition, the control unit 3 causes the display unit 2 to display a key assignment table indicating the correspondence between the keys of the key input unit 1 and the input information. An example of the arrangement of the key assignment table and each input information is shown in FIG. Further, FIG. 5b shows an example of a position corresponding to the arrangement of the key assignment table and the key position of the key input unit 1. As shown in FIGS. 5 a and 5 b, the key assignment table shows input information corresponding to each key of the key input unit 1, and therefore has a 4-row, 3-column arrangement similar to the key arrangement of the key input unit 1. ing. Further, the position of each display portion is indicated by “A” to “L”, and input information converted based on the table shown in FIG. 4 is shown as each element of the key assignment table.

  By referring to the key assignment table displayed on the display unit 2, the user can recognize which key of the key input unit 1 is pressed and which value is input to the key input device.

  For example, a key to be operated when the user inputs the personal identification number “3824” to the key input device will be described.

  FIG. 6 is a diagram showing a relationship between a password, a key position, and a key to be pressed by the user.

  In the key assignment table, the value “3” exists at the position “A”, and the key “1” corresponding to the key position “A” of the key input unit 1 is a key to be pressed by the user. Similarly, the values “8”, “2”, and “4” exist in the positions “F”, “D”, and “H” in the key assignment table, respectively, and the key positions “F”, “F”, Keys “6”, “4”, and “8” corresponding to “D” and “H” are keys to be pressed by the user. That is, when the user sequentially presses the key “1648” of the key input unit 1, the operation key information “1648” is generated by the key input unit 1, and is converted into the input information “3824” by the control unit 3. “3824” is used as a password for authentication.

  The display unit 2 displays a key assignment table in response to a request from the control unit 3.

  Next, processing when the control unit 3 shown in FIG. 1 acquires input information will be described.

  FIG. 2 is a flowchart showing processing when the control unit 3 shown in FIG. 1 acquires input information.

  First, the control unit 3 generates an input information array by randomly rearranging the operation information array, and a conversion table indicating the key position of each key of the key input unit 1, the operation information, and the input information array. Is created (step S1). The conversion table may be changed every time the user inputs a series of operation information, or may not be changed until the user inputs the series of operation information a predetermined number of times.

  Next, the control unit 3 creates a key assignment table based on the conversion table, and displays the created key assignment table on the display unit 2 (step S2).

  Next, the control unit 3 prompts the user to operate the keys to input predetermined information. The user operates the keys while referring to the key assignment table displayed on the display unit 2. When a key is operated by the user, the key input unit 1 generates operation key information representing the operated key. When the operation key information is generated, the key input unit 1 provides the operation key information to the control unit 3.

  When acquiring the operation key information from the key input unit 1 (step S3), the control unit 3 converts the operation key information into input information based on the conversion table (step S4).

  When converting the operation key information into the input information, the control unit 3 performs a predetermined process based on the converted input information. For example, when the acquired input information is a personal identification number, the control unit 3 performs a personal identification number authentication process using the input information.

  The acquisition and conversion of the operation key information may be performed every time the user operates one key, or may be performed collectively at the timing when the user operates the confirmation key.

  In the present embodiment, the user operates the keys of the key input unit 1 while looking at the key assignment table displayed on the display unit 2. Hereinafter, in order to prevent a user's input error, a method for clearly indicating the operated key to the user when the user operates the key will be described.

  In this embodiment, when a user operates a key, the character color of the character at the position corresponding to the operated key in the key assignment table is changed. For example, as shown in FIG. 7a, when the key “1” of the key input unit 1 is operated, the control unit 3 sets the character color of the character “3” at the position “A” in the key assignment table for a predetermined time. Change to the color. Although the predetermined time may be a short time, it is preferable that the time is sufficient for the user to confirm the input characters.

  As another example of the method of indicating the operated key to the user, there is a method of changing the background color of the position corresponding to the operated key in the key assignment table. For example, as shown in FIG. 7b, when the key “1” of the key input unit 1 is operated, the control unit 3 changes the background color of the position “A” in the key assignment table to a predetermined color for a predetermined time. .

  As another example of the method of indicating the operated key to the user, there is a method of displaying a predetermined symbol around the character at the position corresponding to the operated key in the key assignment table. For example, as shown in FIG. 7c, when the key “1” of the key input unit 1 is operated, the control unit 3 causes a predetermined time around the character “3” at the position “A” in the key assignment table. Display the symbol.

  As another example of the method of indicating the operated key to the user, there is a method of displaying the input key around the character at the position corresponding to the operated key in the key assignment table. For example, as shown in FIG. 7d, when the key “1” of the key input unit 1 is operated, the control unit 3 is input around the character “3” at the position “A” in the key assignment table for a predetermined time. Key “1” is displayed.

  Further, as another example of the method of indicating the operated key to the user, there is a method of displaying the input key instead of the character at the position corresponding to the operated key in the key assignment table. For example, as shown in FIG. 7e, when the key “1” of the key input unit 1 is operated, the control unit 3 is input instead of the character “3” at the position “A” in the key assignment table for a predetermined time. Key “1” is displayed.

  Further, as another example of the method of indicating the operated key to the user, there is a method of inverting the character color and the background color at the position corresponding to the operated key in the key assignment table. For example, as shown in FIG. 7f, when the key “1” of the key input unit 1 is operated, the control unit 3 inverts the character color and the background color at the position “A” in the key assignment table for a predetermined time. To display.

  As described above, according to the present embodiment, when information is input from the user, the key input device indicates correspondence between a plurality of keys and input information assigned to each key to the user. . As a result, even if a display device having a touch panel function is not used, the user can input information by operating different keys each time, thus preventing leakage of input information while suppressing the size and cost of the device. be able to.

  Further, according to the present embodiment, since the correspondence between each key and the input information assigned to each key can be randomly generated, high security can be maintained.

  Further, according to the present embodiment, the key input device changes the display of the display portion corresponding to the key operated by the user in the key assignment table displayed on the display unit. While operating the key, the operated key can be confirmed. Thereby, a user's input error can be suppressed.

1 Key input unit 2 Display unit 3 Control unit 10 Key input device

Claims (10)

A key input unit that has a plurality of keys in a predetermined arrangement and generates operation key information representing an operated key when a user performs a key operation;
A display that includes a plurality of display portions corresponding to each of the plurality of keys of the key input unit, and each of the display portions describes input information to be recognized when a key corresponding to the display portion is operated A display for performing
A table representing a correspondence relationship between each of the plurality of keys and input information to be recognized when the key is operated; and when the operation key information is generated by the key input unit, the table And a controller for recognizing that the input information corresponding to the key represented by the operation key information has been input, and changing the display of the display portion corresponding to the key on the display unit,
Have
The change in display of the display portion is a key input device in which operation key information generated by the key input unit is displayed around the input information indicated in the display portion. A key input unit that has a plurality of keys in a predetermined arrangement and generates operation key information representing an operated key when a user performs a key operation;
A display that includes a plurality of display portions corresponding to each of the plurality of keys of the key input unit, and each of the display portions describes input information to be recognized when a key corresponding to the display portion is operated A display for performing
A table representing a correspondence relationship between each of the plurality of keys and input information to be recognized when the key is operated; and when the operation key information is generated by the key input unit, the table And a controller for recognizing that the input information corresponding to the key represented by the operation key information has been input, and changing the display of the display portion corresponding to the key on the display unit,
Have
The display of the change in the display portion is to display the operation key information generated by the key input unit instead of the input information shown in the display portion, a key input device. The control unit randomly generates a correspondence relationship between the key and the input information and records the correspondence relationship in the table, and based on the correspondence relationship, the control unit includes a display portion corresponding to each of the keys. It displays the input information corresponding to the key, the key input device according to claim 1 or 2. Wherein the control unit authenticates the dark card number using the input information as personal identification number, the key input device according to any one of claims 1 to 3. The key operation, it is pressing the key, the key input device according to any one of claims 1 to 4. A key input method for a key input device having a key input unit having a plurality of keys in a predetermined arrangement, a display unit, and a control unit,
The control unit holds a table representing a correspondence relationship between each of the plurality of keys and input information to be recognized when the key is operated;
The display unit includes a plurality of display portions corresponding to the plurality of keys of the key input unit, and an input to be recognized when a key corresponding to the display portion is operated on each of the display portions. Display with information,
When the key operation by the user is performed, the key input unit generates operation key information indicating the operated key,
When the operation key information is generated by the key input unit, the control unit recognizes that input information corresponding to the key represented by the operation key information is input based on the table, and displays the display. To change the display of the display portion corresponding to the key ,
The change in display of the display part is a key input method in which operation key information generated by the key input unit is displayed around the input information indicated in the display part. A key input method for a key input device having a key input unit having a plurality of keys in a predetermined arrangement, a display unit, and a control unit,
The control unit holds a table representing a correspondence relationship between each of the plurality of keys and input information to be recognized when the key is operated;
The display unit includes a plurality of display portions corresponding to the plurality of keys of the key input unit, and an input to be recognized when a key corresponding to the display portion is operated on each of the display portions. Display with information,
When the key operation by the user is performed, the key input unit generates operation key information indicating the operated key,
When the operation key information is generated by the key input unit, the control unit recognizes that input information corresponding to the key represented by the operation key information is input based on the table, and displays the display. To change the display of the display portion corresponding to the key ,
The change in display of the display portion is a key input method in which operation key information generated by the key input unit is displayed instead of the input information shown in the display portion. The control unit randomly generates a correspondence relationship between the key and the input information and records the correspondence relationship in the table. On the basis of the correspondence relationship, the control unit includes a display portion corresponding to each of the keys. The key input method according to claim 6 or 7 , wherein input information corresponding to the key is displayed. Wherein the control unit authenticates the dark card number using the input information as personal identification number, a key input method according to any one of claims 6 to 8. The key operation is pressing the key, the key input method according to any one of claims 6 9.

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