JP2008204409A - Password input display device and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reliably prevent a password from being acquired by a third party and improve security by displaying dummy input keys other than genuine password input keys on a password input screen, thereby preventing the third party from recognizing which of the genuine password input keys have been chosen. <P>SOLUTION: This device has an input display part which can display the password input keys and an input display control part which controls operation of the input display part. The input display part displays the dummy input keys together with the password input keys. When the password input key is pressed, it is treated as an input of the password, and when the dummy input key is pressed, it is treated as an ineffective input of the password. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a password input display apparatus and method.

  Conventionally, users of financial institutions such as banks, credit unions, post offices, etc., when conducting financial transactions such as deposits, withdrawals, transfers, balance inquiries, etc., have been arranged at the branch of the financial institution, that is, a sales office. When operating automatic transaction devices such as ATM (Automatic Teller Machine) and CD (Cash Dispenser), use a cash card and for authentication to authenticate the person It is necessary to enter a password as data. In this case, the personal identification number is generally constituted by a combination of arbitrary four numbers selected in advance by the person among numbers from 0 to 9.

  When a user inputs a password, a numeric keypad is displayed near the center of the screen or at a predetermined position on a display unit having an input function including a touch sensor type keyboard panel. Then, the user touches a predetermined numeric key on the displayed numeric keypad and inputs a personal identification number.

  However, in recent years, from the back of a user who is operating an automatic transaction apparatus using a cash card, he / she steals the operation of entering a PIN and confirms the PIN before stealing or forging the cash card. Thus, fraudulent acts such as pretending to be a user and withdrawing money from a customer's account have frequently occurred.

  Therefore, in order to prevent the user from seeing the number being entered when entering the personal identification number, the layout of the numeric keypad for entering the personal identification number, the size of the key, the numerical arrangement, etc. are changed, A technique has been proposed in which the arrangement of each key is not known to anyone other than the operating person (see, for example, Patent Documents 1 to 3).

As a result, even if the operation for entering the PIN number is voyeurized by a camera illegally installed around the automatic transaction apparatus or seen from behind the user, the location of the numeric keypad is not known. It will not be known to the person. If the security code is not known to a third party, it is possible to prevent unauthorized use of the cash card by a third party even if the cash card is stolen or forged.
JP 09-212716 A JP 05-334334 A Japanese Patent Laid-Open No. 10-105781

  However, in the conventional automatic transaction apparatus, since the arrangement of the numeric keypad for entering the password is only changed, it is possible to know where the numeric keypad is arranged on the screen, so that the security can be sufficiently increased. Can not. For this reason, the personal identification number is grasped by a third party, and the cash card is illegally used.

  The present invention solves the above-mentioned conventional problems, and displays a dummy input key in addition to the genuine password input key on the password input screen, and which of the genuine password input keys is selected. It is an object of the present invention to provide a personal identification number input display device and method that can prevent the third party from visually recognizing the personal identification number, reliably prevent the third party from grasping the personal identification number, and increase security. To do.

  For this purpose, the personal identification number input display device of the present invention has an input display unit capable of displaying a personal identification number input key, and an input display control unit for controlling the operation of the input display unit, the input display unit comprising: A dummy input key is displayed together with the code number input key, and when the code number input key is pressed, it is handled as an input of the code number, and when the dummy input key is pressed, it is handled as invalid input of the code number.

  In another personal identification number input display device of the present invention, the personal identification number input key and the dummy input key are displayed in different font sizes, font types, or colors.

  In yet another personal identification number input display device of the present invention, the personal identification number input key and the dummy input key are displayed with the same font size, font type and color.

  In the security code input display method of the present invention, a dummy input key is displayed together with a security code input key on the input display section, and when the security code input key is pressed, it is handled as input of the security code, and the dummy input key is pressed. If this is done, it will be treated as invalid input of the PIN.

  In another password input / display method according to the present invention, the password input key and the dummy input key are displayed in different font sizes, font types, or colors.

  In still another PIN code input display method of the present invention, the PIN code input key and the dummy input key are displayed with the same font size, font type and color.

  According to the present invention, the personal identification number input display device displays a dummy input key in addition to the genuine personal identification number input key on the personal identification number input screen. This makes it impossible for a third party to visually recognize which of the genuine PIN code input keys has been selected, ensuring that the PIN code is not comprehended by the third party, and increasing security. Can do.

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

  FIG. 2 is a block diagram showing the configuration of the automatic transaction apparatus according to the first embodiment of the present invention, FIG. 3 is a diagram showing the appearance of the automatic transaction apparatus according to the first embodiment of the present invention, and FIG. 4 is the present invention. It is a figure which shows the structure of the system of the automatic transaction apparatus in 1st Embodiment of this.

  In the figure, reference numeral 10 denotes an automatic transaction apparatus as a personal identification number input / display apparatus, which is arranged at a branch of a financial institution such as a bank, a credit union, a post office, etc. It is a device for conducting transactions such as money, passbook entry, balance inquiry, transfer, transfer, remittance, that is, financial transactions. The automatic transaction apparatus 10 is a store of a store such as a convenience store, a supermarket, a department store, an underground mall, a station premises, a city hall, a public facility such as a hospital, a private company such as a factory or an office, a parking lot, a roadside ( It may be arranged outdoors such as aside).

  The personal identification number input display device is not necessarily limited to an automatic transaction device for performing financial transactions, for example, unmanned contract terminals operated by themselves to perform loan contracts such as unsecured loans and card loans, Shopping terminals for ticket reservations and product purchase applications, vending machines that sell cigarettes and beverages, POS (Point of Sales) terminals for paying for the prices at store cash registers, station premises, etc. It may be a ticket vending machine for issuing tickets for railways arranged at the airport, a ticket issuing machine for issuing boarding passes for aircraft arranged at airports, and the like. Here, for convenience of explanation, only the case where the personal identification number input display device is the automatic transaction device 10 will be described.

  Reference numeral 11 denotes a main control unit of the automatic transaction apparatus 10, which is connected to a host computer 31 as a billing system upper apparatus disposed in a computer center or the like of a financial institution via an interface unit 21 via a network 32. . The network 32 includes a dedicated line, a telephone line, and the like. Reference numeral 33 denotes a database serving as a storage unit connected to the host computer 31 and stores various information such as the address, name, password, account balance, and account number information of a user who is a customer of a financial institution. ing.

  Reference numeral 22 denotes a memory unit serving as a storage unit, which stores a program executed by the main control unit 11, a processing result by the main control unit 11, and the like.

  Furthermore, 40 is an input display unit as an operation unit operated by the user, and is disposed on the front surface of the automatic transaction apparatus 10. The input display unit 40 includes a combination of a display device such as a CRT or LCD (Liquid Crystal Display) and an input device including position signal detection means such as a touch panel. That is, the input display unit 40 has both a display function and an input function. On a screen such as a transaction selection screen, a screen for inquiring user's wishes, a screen for prompting the user's operation, etc. Displays input means and accepts user input.

  Reference numeral 12 denotes a card processing unit that processes cards. The card processing unit 12 is a customer identification card issued by a financial institution and storing customer information such as a code for each financial institution, a user account number, and a name, that is, a cash card 34 or a code of a transfer destination institution. It has a function of reading information stored in the card from a transfer-dedicated card in which transfer information such as the transfer card is recorded, that is, a card such as the transfer card 35.

  A card insertion / return port 12a is connected to the front side of the card processing unit 12, and a cash card 34 and a transfer card 35 are inserted and discharged through the card insertion / return port 12a. The cash card 34 and the transfer card 35 are provided with magnetic stripes for storing information such as customer names and account numbers. Further, the storage means for storing the information may be an IC embedded in the cash card 34 and the transfer card 35 instead of the magnetic stripe.

  Further, the automatic transaction apparatus 10 has a passbook processing unit 15 for writing in a passbook such as a deposit passbook. Here, the bankbook is a booklet bankbook such as a bankbook issued by a financial institution to a customer, and records of financial transactions such as deposits, withdrawals, transfers, transfers, remittances, and periodic deposit settings are printed. It is what is done. The front cover or back cover of the passbook is provided with a magnetic stripe for storing information such as the user's name and account number. Further, the storage means for storing the information may be an IC embedded in a passbook instead of the magnetic stripe.

  The bankbook processing unit 15 includes a bankbook insertion / return port 15a into which a bankbook is inserted. In the passbook insertion / return port 15a, a transport device (not shown) for transporting the passbook, a print head for printing a record of the financial transaction on the passbook, reading of the information stored in the magnetic stripe of the passbook and IC, and overwriting In addition, a magnetic head, an IC contact, etc. for erasing and the like are provided.

  Further, the automatic transaction apparatus 10 includes a receipt processing unit 13 that issues a statement slip on which transaction details are printed. The statement slip is a piece of paper on which information related to financial transactions performed by the customer such as deposit, withdrawal, balance inquiry, transfer, transfer, remittance, fixed deposit, etc. is printed, account number, type of financial transaction, transaction The amount is printed. The statement slip may be issued only when the user desires.

  Reference numeral 16 denotes a bill depositing / withdrawing unit, which authenticates and counts the bills deposited by the user, stores the bill in a temporary storage unit (not shown), feeds it out from the temporary storage unit, conveys it, and denominations (not shown) Banknotes stored in a safe or paid to a user are paid out from a denomination safe. Further, 17 is a coin deposit / withdrawal unit, which authenticates and counts coins deposited by the user, transports them and stores them in a denomination safe deposit box (not shown), or coins paid to the users as gold It is delivered from the type storage safe.

  In addition, 16a is a banknote depositing / withdrawing port of the said banknote depositing / withdrawing part 16, and functions as a banknote depositing port for accepting the banknote inserted by the user, and a banknote dispensing port for delivering a banknote to a user. Reference numeral 17a denotes a coin deposit / withdrawal port of the coin deposit / withdrawal unit 17, which functions as a coin deposit / receiver port for receiving a coin inserted by the user and a coin / withdrawal port for delivering the coin to the user.

  Next, the operation of the automatic transaction apparatus 10 having the above configuration will be described.

  FIG. 1 is a diagram showing an example of a password input screen according to the first embodiment of the present invention.

  Here, the operation of the automatic transaction apparatus 10 when the user performs a withdrawal transaction will be described. In the memory unit 22 of the automatic transaction apparatus 10, a “service for executing a withdrawal transaction process in which a process for delivering a banknote in a normal withdrawal transaction is changed and other ordinary transaction processes are executed. It is assumed that an “execution program” is stored in advance. Then, when a staff member such as a financial institution turns on the power of the automatic transaction apparatus 10 at the time of starting business, power is supplied to each part of the automatic transaction apparatus 10. Thereby, the “business execution program” stored in the memory unit 22 of the automatic transaction apparatus 10 is automatically activated.

  When the “business execution program” is activated, the main control unit 11 of the automatic transaction apparatus 10 functions as an input display control unit, displays a transaction selection screen on the input display unit 40, and stands by. In the transaction selection screen, a message prompting to press the transaction button, a button for selecting a withdrawal transaction, a button for selecting a deposit transaction, a button for selecting a transfer transaction, a transfer transaction, For selecting various financial transactions, such as a button for selecting, a button for selecting a balance inquiry transaction for inquiring an account balance, a button for selecting a passbook filling transaction for filling transaction data not filled in the passbook The transaction button is displayed.

  Here, it is assumed that the user selects a withdrawal transaction from the screen of the input display unit 40 and presses the corresponding button.

  Subsequently, when the main control unit 11 recognizes the transaction selected by the user by a position signal or the like from the touch panel of the input display unit 40, the main control unit 11 determines whether or not the withdrawal transaction is selected. If the withdrawal transaction is not selected, it is determined whether or not the deposit transaction is selected. Then, when the deposit transaction is selected, the deposit transaction process is executed. When the deposit transaction is not selected, it is determined whether or not the transfer transaction is selected. If the transfer transaction is selected, the transfer transaction process is executed, and if not selected, the other transaction process is executed and the process ends. In addition, description about a payment transaction process, a transfer transaction process, and another transaction process is abbreviate | omitted.

  Further, when the withdrawal transaction is selected by determining whether or not the withdrawal transaction is selected, the main control unit 11 takes in the card. In this case, the main control unit 11 displays on the input display unit 40 a card insertion request screen on which a word prompting the insertion of the cash card 34, an illustration of the cash card 34, and a cancel button for canceling the transaction are displayed. To do.

  Then, the user inserts the cash card 34 into the card insertion / return port 12a of the card processing unit 12 according to the card insertion request screen. Then, the card processing unit 12 takes in the cash card 34 and reads card information such as an account number recorded in the magnetic stripe.

  When the user presses a cancel button for canceling the transaction, the main control unit 11 ends the withdrawal transaction process, returns to the original, displays the transaction selection screen on the input display unit 40, and waits. . When the cash card 34 is inserted into the card insertion / return port 12a, the cash card 34 is discharged and returned to the user.

  Subsequently, the main control unit 11 that has read the card information causes the input display unit 40 to display a personal identification number input screen 41 as shown in FIG. 1 and prompts the user to input the personal identification number. The personal identification number input screen 41 has a character string composed of a genuine numeric key 42 serving as a genuine personal identification number input key, a non-numeric character string 43 composed of characters other than numerals, and a dummy numeric key 44 serving as a dummy input key. Is displayed. The genuine number key 42 and the dummy number key 44 include keys indicating numbers 0 to 9, respectively. The dummy numeric keys 44 are displayed with a font size different from that of the genuine numeric keys 42.

  In the example shown in FIG. 1, four character strings are displayed, and each line is configured to include all of the genuine numeral key 42, the non-numeric character string 43, and the dummy numeral key 44. The character string in the first line is, for example, “December 12 is Thanksgiving Day every year!” In the character string, the number “12” of “December” consists of a genuine number key 42, and the number “12” of “12 days” consists of a dummy number key 44. In this case, the number “12” of “12 days” composed of the dummy number keys 44 is displayed in a font size (in the example shown in FIG. 1, a larger font size) different from the true number key 42. The user can surely recognize the dummy numeric key 44. The arrangement of the genuine numeral key 42, the non-numeric character string 43, and the dummy numeral key 44 in the four lines of character strings is changed every time the password input screen 41 is displayed.

  Then, the user reads the character string of the four lines, identifies the genuine number key 42 included therein, and inputs the code number by pressing the genuine number key 42 corresponding to the code number. If the user accidentally presses the dummy number key 44, it is handled as invalid input of the password. In this case, for example, when the pressed dummy number key 44 is highlighted, the user can recognize that it is the dummy number key 44.

  The personal identification number input screen 41 may include a correction button for correcting an input error, a confirmation button for confirming the input of the personal identification number, a cancel button for canceling the transaction, and the like. . In this case, after the user inputs the password by pressing the genuine number key 42, the user presses the confirmation button for confirmation.

  Subsequently, the main control unit 11 that has recognized the input of the personal identification number displays a withdrawal amount input screen on the input display unit 40 and prompts the user to input the withdrawal amount. On the withdrawal amount input screen, a message prompting you to enter the withdrawal amount, a withdrawal amount input field, a numeric keypad for entering the withdrawal amount, a digit key such as “10,000”, and an incorrect entry A correction button for correcting, a confirmation button for confirming input of the withdrawal amount, a cancel button for canceling the transaction, and the like are displayed. Then, the user operates the numeric keypad to input the withdrawal amount and presses the confirmation button.

  Subsequently, the main control unit 11 that has recognized the input of the withdrawal amount displays a standby request screen on the input display unit 40 and communicates with the host computer 31. In this case, the main control unit 11 creates a transaction message by attaching the PIN number, payment amount, etc. input to the card information of the cash card 34, and transmits the transaction message to the host computer 31 via the network 32. Inquire about whether or not there is a problem with the PIN and payment amount.

  Then, the host computer 31 that has received the transaction message determines whether or not there is a problem by referring to the managed customer information, determines whether or not the transaction is possible, and returns the determination result to the main control unit 11 as a transaction approval / disapproval message. To do.

  Subsequently, the main control unit 11 determines whether or not there is a problem with the personal identification number and the payment amount based on the received transaction propriety message, that is, whether or not the transaction is permitted. If there is a problem with the password and the payment amount, the main control unit 11 displays a card receipt request screen on the input display unit 40 and urges the user to receive the cash card 34 as a transaction impossible. On the card receipt request screen, a word prompting receipt of the cash card 34 and an illustration of the cash card 34 are displayed. Further, the card processing unit 12 discharges the cash card 34 from the card insertion return port 12a. When it is confirmed that the user has received the cash card 34, the main control unit 11 ends the withdrawal transaction process.

  Further, if the transaction is possible by determining whether or not the transaction is possible, the main control unit 11 displays a standby request screen on the input display unit 40. On the other hand, the banknote deposit / withdrawal unit 16 counts banknotes. That is, the denomination corresponding to the input withdrawal amount is selected, the banknotes are drawn out one by one from the banknote safe of the denomination by the separation mechanism, and conveyed to the banknote discrimination unit, and the denomination of the banknote is discriminated. Are counted and conveyed to the banknote deposit / withdrawal port 16a. And the banknote corresponded to the amount of money to pay is integrated | stacked on the said banknote depositing / withdrawing port 16a with a separation and accumulation mechanism.

  In parallel with this, the main control unit 11 creates print data based on the transaction contents and sends it to the receipt processing unit 13. Then, the receipt processing unit 13 prints the print data on the statement slip. Then, the main control unit 11 causes the input display unit 40 to display a card statement slip request screen, and prompts the user to receive the cash card 34 and statement slip. On the card statement slip request screen, a word prompting receipt of the cash card 34 and the statement slip and an illustration of the cash card 34 and the statement slip are displayed. Then, the card processing unit 12 discharges and returns the cash card 34 from the card insertion return port 12a. The receipt processing unit 13 issues a statement slip.

  Subsequently, the main control unit 11 confirming that the user has received the cash card 34 or the like displays a shutter opening instruction screen on the input display unit 40 and prompts the user to press the shutter open button. On the shutter opening instruction screen, a bill receiving method and a shutter opening button for instructing to open the shutter of the banknote deposit / withdrawal port 16a are displayed.

  Subsequently, the main control unit 11 repeats the determination of whether or not there is an instruction to open the shutter, and waits until the user presses the shutter open button and instructs to open the shutter of the banknote deposit / withdrawal port 16a. When the user presses the shutter open button, the main control unit 11 causes the input display unit 40 to display a bill receipt request screen, prompts the user to accept bills, and opens the shutter of the bill deposit / withdrawal port 16a. Open.

  Subsequently, the main control unit 11 that has opened the shutter of the banknote deposit / withdrawal port 16a repeats the determination of whether or not the banknote has been completely extracted until the user removes the banknotes accumulated at the banknote deposit / withdrawal port 16a. stand by.

  When the withdrawal of the banknote is completed, the main control unit 11 displays a transaction end screen on the input display unit 40, closes the shutter of the banknote deposit / withdrawal port 16a, and ends the withdrawal transaction process.

  Thus, in the present embodiment, since the character string composed of the genuine numeral key 42, the non-numeric character string 43, and the dummy numeral key 44 is displayed on the personal identification number input screen 41, the third party It is impossible to visually recognize which of the keys 42 has been selected and the password has been entered. Further, when the dummy numeric key 44 is pressed, it is handled as invalid input of the password. For this reason, it is possible to reliably prevent the third party from ascertaining the personal identification number and increase the security.

  In the present embodiment, only an example in which the genuine number key 42 and the dummy number key 44 are displayed with different font sizes will be described so that the user can identify the genuine number key 42 and the dummy number key 44. However, the genuine number key 42 and the dummy number key 44 may be displayed in different font types or in different colors.

  Next, a second embodiment of the present invention will be described. In addition, about the thing which has the same structure as 1st Embodiment, the description is abbreviate | omitted by providing the same code | symbol. The description of the same operation and the same effect as those of the first embodiment is also omitted.

  FIG. 5 is a diagram showing an example of a personal identification number input screen according to the second embodiment of the present invention.

  In the present embodiment, the character string display mode on the password input screen 41 is different from that of the first embodiment. Since the configuration and operation of other points are the same as those in the first embodiment, description thereof is omitted.

  As shown in FIG. 5, the password input screen 41 is a character string including a dummy number key 44 in addition to a character string composed of a genuine number key 42, a non-numeric character string 43 and a dummy number key 44. A dummy instruction display 45 is displayed as a display indicating this. The genuine number key 42 and the dummy number key 44 include keys indicating numbers 0 to 9, respectively. The dummy instruction display 45 includes a non-numeric character string 43 indicating that the character string includes the dummy numeric key 44, and is displayed as, for example, “dummy text”. In the present embodiment, the genuine number key 42 and the dummy number key 44 are displayed with the same font size, font type, and color.

  In the example shown in FIG. 5, four lines of character strings are displayed, and the first to third lines are composed of a genuine numeric key 42 and a non-numeric character string 43, and the fourth line, that is, the bottom line is A dummy numeric key 44 and a non-numeric character string 43 are configured. That is, only the bottom line is configured to include the dummy numeric key 44. A dummy instruction display 45 is added to the bottom line.

  In this case, the character string in the first line is, for example, “Third conference room on the east side of the 12th floor”. In the character string, all numbers are made up of genuine number keys 42. Similarly, in the character strings in the second and third lines, all numbers are made up of the genuine number keys 42.

  The character string on the bottom line is, for example, “residents in room 903 of this apartment.”, Followed by a dummy instruction display 45 such as “dummy text”. In the character string on the bottom line, all numbers are made up of dummy number keys 44. The dummy instruction display 45 may be integrally included in the character string on the bottom line. For example, the character string on the bottom line may be “This sentence is a dummy 903”.

  Thus, since the dummy instruction display 45 is added to the line including the dummy number key 44, even if the genuine number key 42 and the dummy number key 44 are displayed with the same font size, font type and color, they can be used. The person can surely recognize that the number included in the row is the dummy number key 44. It should be noted that the arrangement of the genuine numeral key 42, the non-numeric character string 43, the dummy numeral key 44, and the dummy instruction display 45 in the four lines of character strings is changed each time the password input screen 41 is displayed.

  Then, the user reads the character string of the four lines, identifies the genuine number key 42 included therein, and inputs the code number by pressing the genuine number key 42 corresponding to the code number. If the user accidentally presses the dummy number key 44, it is handled as invalid input of the password. In this case, for example, when the pressed dummy number key 44 is highlighted, the user can recognize that it is the dummy number key 44.

  In this way, in the present embodiment, since the true number key 42 and the dummy number key 44 are displayed with the same font size, font type and color, the true number key 42 and the dummy number key are displayed for the third party. 44 is difficult to distinguish. For this reason, it is possible to reliably prevent the third party from ascertaining the personal identification number and increase the security.

  In the present embodiment, the example in which the dummy instruction display 45 is added to the line including the dummy number key 44 has been described. However, a special character indicating that the dummy number key 44 is included, for example,? May be included in the line including the dummy numeric key 44. That is, a line including the dummy numeric key 44 may be displayed as, for example, “?????? 903 ???”.

  Further, the character string may be fluidly displayed. In this case, since the character string is flowing, the position to be pressed changes depending on the timing at which the user presses the genuine number key 42 corresponding to the code number, so that the code number can be grasped by peeping. It becomes difficult.

  Furthermore, the present invention is not limited to the above-described embodiment, and various modifications can be made based on the spirit of the present invention, and they are not excluded from the scope of the present invention.

It is a figure which shows the example of the PIN code input screen in the 1st Embodiment of this invention. It is a block diagram which shows the structure of the automatic transaction apparatus in the 1st Embodiment of this invention. It is a figure which shows the external appearance of the automatic transaction apparatus in the 1st Embodiment of this invention. It is a figure which shows the structure of the system of the automatic transaction apparatus in the 1st Embodiment of this invention. It is a figure which shows the example of the PIN code input screen in the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Automatic transaction apparatus 11 Main control part 40 Input display part 42 True number key 44 Dummy number key

Claims (6)

(A) an input display section capable of displaying a password input key;
(B) an input display control unit for controlling the operation of the input display unit;
(C) The input display unit displays a dummy input key together with a password input key,
(D) A personal identification number input display device, wherein when the personal identification number input key is pressed, it is handled as an input of a personal identification number, and when the dummy input key is pressed, it is handled as invalid input of a personal identification number. The personal identification number input display device according to claim 1, wherein the personal identification number input key and the dummy input key are displayed with different font sizes, font types, or colors. The personal identification number input display device according to claim 1, wherein the personal identification number input key and the dummy input key are displayed with the same font size, font type, and color. (A) Display a dummy input key together with a password input key on the input display section,
(B) A code number input display method, wherein when the code number input key is pressed, the code number is handled as input, and when the dummy input key is pressed, the code number is invalidated. The password input / display method according to claim 4, wherein the password input key and the dummy input key are displayed in different font sizes, font types, or colors. The password input / display method according to claim 4, wherein the password input key and the dummy input key are displayed with the same font size, font type and color.

Images