SEMICONDUCTOR DEVICE, METHOD OF AUTHENTIFYING AND SYSTEM

摘要

The semiconductor device (11) of the invention comprises a circuit and a protecting structure (50). It is provided with a first and a second security element (12A, 12B) and with an input and an output (14, 15). The security elements (12A, 12B) have a first and a second impedance, respectively, which impedances differ. The device is further provided with measuring means, processing means and connection means. The processing means transform any first information received into a specific program of measurement. Herewith a challenge-response mechanism is implemented in the device (11) and a reader in order to check the authenticity or establish the identity of the device (e.g. smartcard).