Casio Computer Co., Ltd.

Motoi Otsuka

Shigenori Morikawa

Toshiyuki Iguchi

Data containing important information are stored in DB cards separable from terminals. The terminals and mediums are placed in corresponding relationship. Multi-security measures are taken to prevent a third party not authorized to access one of the DB cards from accessing the card and its data due to loss and robbery of the DB card and the third party's malice to thereby prevent the information from leaking out from the DB card. To this end, when the terminal accesses the DB card, the terminal compares its own hardware identification number with that of the card to determine whether the terminal is authorized to access the DB card. When it is, the terminalfurther compares its own software identification number with that of the card to determine whether the terminal is further authorized to access a mobile DB in the card.

Portable terminals, servers, systems, and their program recording mediums

With a portable compact flash card retaining application software/database set in a portable terminal, the portable terminal performs data processing by accessing the application software/database in the CF card. First, the portable terminal reads terminal ID previously stored in the CF card. Then, the portable terminal compares the terminal ID in the CF card with its own terminal ID previously set, and determines whether or not to be able to access the application software/database in the CF card based on the comparison result.

Growing community of inventors

Tachikawa, Japan

Motoi Otsuka