| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a portable electronic device and IC card capable of preventing, for example, runaway of a program resulting from disturbance so that important data stored inside can be prevented from being leaked and altered by restricting executable program modules or accessible data in each phase (use stage). <P>SOLUTION: In the IC card capable of switching phases (stages to be used), among an initialization phase, an issuing phase and an operation phase, restricts executable program modules or accessible data in each phase (use stage). <P>COPYRIGHT: (C)2007,JPO&INPIT |
