Chip card with electronic security circuit

摘要

The chip card (K) has at least one semiconductor chip (6) with chip contacts (1,2) for providing operating energy for the electronic chip and allowing bidirectional data transfer. The line connection (A) between the a chip contact and the chip microprocessor (4) is divided into at least 2 current paths (B,C), with the sum of their currents held at a constant value, for preventing read-out of the microprocessor function.