INFORMATION STORAGE MEDIUM, IC CHIP EQUIPPED WITH MEMORY AREA, INFORMATION PROCESSOR HAVING IC CHIP EQUIPPED WITH MEMORY AREA, AND MEMORY MANAGING METHOD FOR INFORMATION STORAGE MEDIUM

摘要

PROBLEM TO BE SOLVED: To efficiently control the right to access each application allocated to the memory area of an IC card. SOLUTION: By introducing a hierarchical structure into memory areas on the IC card, applications allocated to the memory areas are registered in directories to manage the memory areas by directories. Password codes are set by the applications or directories to control the right to access. If a portable terminal is lost, the right to access applications in the IC card is automatically lost.