Patent ID: 6669098
Filing Date: 2003-12-30
Classification: G06K

Abstract:
A data carrier (1) including a chip (10) having a supply voltage generating means (5) for energizing the chip (10) through circuit point (12), from which a supply voltage (V) can be taken, and including at least one integral circuit component (24, 29) which is designed for communicating with a component communication means (17) which is spatially separated from the chip (10) and which has a supply voltage input (25, 30), to which a supply voltage (V1, V2) can be applied, characterized in that the chip (10) has a supply voltage output (21, 22), and the supply voltage input (25, 30) of the component (24, 29) is connected to the supply voltage output (21, 22) of the chip (10) via a connection lead (27, 32), and the chip (10) includes controllable potential control means (35, 49) to which a control signal (S) can be applied and with the aid of which the supply voltage output (21, 22) can be set to different potential values in accordance with the control signal (S) and in response to attempted data access by an unauthentic user such that said user cannot access data.