| 摘要 |
<P>PROBLEM TO BE SOLVED: To semipermanently use an internal battery of an IC card in an authentication system using sound. <P>SOLUTION: In the authentication system using sound, the IC card is provided with a microprocessor, a memory, a second memory storing authentication information data encrypted by a program in the memory by the microprocessor, a speaker transmitting the authentication information data to the outside as sound waves, and a coil generating electric power to be supplied to the microprocessor and the speaker, and the authentication terminal device is provided with a card insertion opening, a housing space housing the IC card inserted from the card insertion opening, a magnetic field generating means for having a magnetic field act on an electric power generating means of the IC card housed in the housing space to generate electric power, and a microphone receiving the authentication information data transmitted by the speaker in the housing space. <P>COPYRIGHT: (C)2007,JPO&INPIT |
