Securitisation of the supply of a control means of a chip card in the event of attack

摘要

The microcircuit card (100) has a detector for detecting an attack aiming to cut off power supply to the card, and a command unit (130) for charging a charge pump (120) to apply a programming voltage to command a write operation into a one time programmable (OTP) cell (110) of an electrically EPROM memory when the attack is detected. A capacitor (140) is arranged so as to be supplied with power during normal operation to supply power to the charge pump only when the attack is detected, where the capacitor supplies the power to the command unit when the attack is detected.