| 摘要 |
<P>PROBLEM TO BE SOLVED: To make it possible for a sender to correctly and easily obtain the public key of the opposite transmitter in an enciphered sending of an electronic mail by a public key system. <P>SOLUTION: In a business card, a first QR code, in which personal information such as a full name, an address, an electronic mail address or the like is encoded, a second QR code, in which a public key is encoded, and a third QR code, in which the public key is encoded together with the personal information such as the full name, the address, the electronic mail address or the like, are recorded. When the first or third QR code is photographed by the camera part 6 of a mobile phone 1, a controlling part 2 decodes the personal information of the nominee himself of the business card recorded in the photographed QR code and the public key so as to register them in the storage region 9b for an address register of a storage part 9. <P>COPYRIGHT: (C)2007,JPO&INPIT |
