MICROCIRCUIT CARD PROTECTED FROM INVASION

摘要

PURPOSE: To perform protection from intrusion by a dynamic means by arranging at least one distortion sensor on a micro-circuit, turning it in a prestressed state and detecting the change of the prestressed state by the trial of taking out the micro-circuit from a card. CONSTITUTION: At least one distortion sensor C1 -C3 is inserted in a characteristic and artificial prestressed state and the prestressed state is destructed by the trial of taking out the micro-circuit 10 from the card. Thus, when a dishonestly acting person to access the micro-circuit tries the intrusion, the protective layer is surely damaged. Thus, the card does not function or it is decided to report to a service station to cooperate that the card is intruded.