GRAPHIC KEY PAD, METHOD FOR CHANGING KEY ARRANGEMENT OF GRAPHIC KEY PAD, AND METHOD FOR PASSWORD AUTHENTICATION USING THE GRAPHIC KEY PAD

摘要

PURPOSE: A graphic keypad, a key arrangement modification method thereof, and a password authentication method using the same are provided to prevent leakage of a password or a secret number by modifying a key arrangement of the keypad. CONSTITUTION: A display unit(100) includes a virtual graphic keypad unit(101) for user input. A storage unit(170) stores software needed for modification of key arrangement change, and the software or a program needed for operating a portable terminal. If a user requests modification of the key arrangement, a controller(150) provides a key arrangement modification mode. A sensor(160) detects the user input for rearranging the keystroke of a default keypad. The graphic keypad includes a plurality of keys. The keys are rearranged according to sensing from the sensor.