SECURITY TOKEN AND HANDLER ROUTINE EXECUTION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a security token capable of preventing a malfunction which is problematic in a security point of view, even if a laser is irradiated on a program counter.SOLUTION: A security token 1 is configured to: set time required for processing with respect to a handler routine 12 when starting execution of the handler routine 12 at a timer 104 as time-out time; stop the timer 104 after the timer 104 is activated, when all the processing with respect to the handler routine 12 is complete; and execute error processing when timer interruption occurs at the timer 104.