Electronic apparatus and recording medium storing password input program

1. An electronic apparatus that accepts password input, comprising:

a displaying unit that includes a plurality of display positions, the display positions displaying a symbol string of a plurality of digits, and displays candidate symbols for inputting a password at each of the display positions;

an input unit that includes a plurality of select buttons corresponding to the display positions of the displaying unit, and selects the candidate symbols by each operation of the select buttons corresponding to the candidate symbols displayed on the display positions; and

a processing unit that generates a plurality of the candidate symbols to display the generated candidate symbols at the display positions of the displaying unit randomly, and invalidates the operation of at least one of the select buttons of the input unit,

wherein the processing unit ignores the operation of the select button, the operation of which is invalidated, accepts selection of the candidate symbols by the operation of the select buttons, the operation of which is not invalidated, defines the candidate symbols which are accepted as an input password, and determines whether the input password is correct or not.

2. The electronic apparatus of claim 1 , further comprising:

a random-number generating unit that generates random numbers; and

a database that stores the candidate symbols of the password,

wherein, using the random numbers acquired from the random-number generating unit, the processing unit acquires the candidate symbols from the database and displays the candidate symbols at the display positions of the displaying unit.

3. The electronic apparatus of claim 1 , wherein

the processing unit sets a display permission permitting a scenario in which none of the candidate symbols displayed at the display positions correspond to a character of the password.

4. The electronic apparatus of claim 1 , further comprising:

a second display unit that displays a dialogue display screen for setting invalidation based on pressing down of the select button, selection of at least one of the select buttons where the invalidation is set, permission to display with not including a candidate character applicable to the password at the display positions, or permission to display the candidate character applicable to the password at the display position corresponding to the select button where the invalidation is set, or any combination thereof.

5. The electronic apparatus of claim 1 , wherein

the processing unit sets a select button selected from the select buttons of the input unit to the select button, the operation of which is invalidated.

6. The electronic apparatus of claim 1 , wherein

the processing unit sets permission to display the candidate symbol applicable to the password at the display position corresponding to the select button, operation of which is invalidated, so as to display the candidate symbol at the display position.

7. The electronic apparatus of claim 1 , wherein

the operation of the select button is to press down the select button, and

the processing unit selects a setting for invalidating pressing down of the select button and a setting for permitting display of the candidate symbol applicable to the password at the display position corresponding to the select button, the operation of which is invalidated, so as to make it possible to set prioritization of the settings.

8. The electronic apparatus of claim 1 , wherein

the processing unit sets input of a candidate symbol not applicable to the password after completion of input of the password.

9. The electronic apparatus of claim 1 ,

wherein the displaying unit is constituted of a portion of a main display or a sub-display, the main display or the sub-display being installed in the electronic apparatus.

10. The electronic apparatus of claim 1 ,

wherein the displaying unit is constituted of images on a display screen.

11. The electronic apparatus of claim 1 ,

wherein the select buttons are constituted of images on a display screen.

12. The electronic apparatus of claim 1 ,

wherein the candidate symbols include characters or graphics.

13. A non-transitory computer-readable recording medium storing a password input program, the program causing a computer to perform a method, the method comprising:

generating a plurality of candidate symbols for inputting a password;

displaying the generated candidate symbols at a plurality of display positions randomly;

invalidating operation of at least one of a plurality of select buttons corresponding to the display positions;

ignoring the operation of the select button, the operation of which is invalidated;

accepting selection of the candidate symbols by the operation of the select buttons, the operation of which is not invalidated; and

defining the candidate symbols which are accepted as an input password, and determining whether the input password is correct or not.

14. The recording medium of claim 13 , the method further comprising:

generating random numbers; and

using the random numbers to acquire the candidate symbols of the password stored in a database.

15. The recording medium of claim 13 , the method further comprising:

setting a display permission permitting a scenario in which none of the candidate symbols displayed at the display positions correspond to a character of the password.

16. The recording medium of claim 13 , the method further comprising:

displaying a dialogue display screen for setting invalidation based on pressing down of the select button, selection of at least one of the select buttons where the invalidation is set, permission to display with not including a candidate character applicable to the password at the display positions, or permission to display the candidate character applicable to the password at the display position corresponding to the select button where the invalidation is set, or any combination thereof.

17. The recording medium of claim 13 , the method further comprising:

setting permission to display the candidate symbol applicable to the password at the display position corresponding to the select button, the operation of which is invalidated.

18. The recording medium of claim 13 , wherein the operation of the select button is to press down the select button, the method further comprising:

selecting a setting for invalidating pressing down of the select button and a setting for permitting display of the candidate symbol applicable to the password at the display position corresponding to the select button, the operation of which is invalidated; and

setting prioritization of the settings.

19. The recording medium of claim 13 , the method further comprising:

setting input of a candidate symbol not applicable to the password after completion of input of the password.

20. The recording medium of claim 13 , the method further comprising generating the display positions on images on a display screen.

21. The recording medium of claim 13 , the method further comprising taking in one of the candidate symbols at one of the display positions with one of the select buttons selected.

22. The recording medium of claim 13 , the method further comprising generating the select buttons on images on a display screen.