MODULE AND METHOD WITH SECURE PASSWORD INPUT FUNCTION USING THE BUTTON SOUND OF CELLULAR PHONE

摘要

PURPOSE: An input module with a safe password input function for using the mobile button sound and an input method thereof are provided to minimize the size of device by applying the input module. CONSTITUTION: A control unit(240) interlinks an application(300) and a sound signal processing unit(220). The control unit transmits a random mapping table according to the random mapping table request for transmission indicating the mapping function interlinking a virtual keyboard arbitrarily produced to a physical child board in the application. By replacing with the digital information coping with the included digital information with the response message of the sound signal processing unit, the control unit produces the new response message. A microphone(210) transmits a sound signal of a cellular phone keyboard in the sound signal processing unit. The sound signal processing unit changes an analog sound signal transmitted from micro into a digital signal. The sound signal processing unit transmits the digital information corresponding to the digital signal in the control unit. A storage unit(230) stores the digital signal and digital information.