Device for detecting attempts at fraud on an apparatus for reading and writing on a chip card
AssigneeLandis & Gyr Business Support AG
InventorPhilippe Vauclin
Life of this patent
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Abstract
A device for detecting attempts at fraud by connection of an electric feed line (13) to an apparatus for reading and writing on a chip card (3) essentially comprises a resonance unit (6) coupled to a contacting element (2) of the apparatus, and a measuring device (7). In the resonance unit (6) a generator (4) which is coupled to a resonator (1) by way of an impedance converter (5) generates a standing wave. The feed line (13) disturbs the properties of the resonator (1), that being detected by the measuring device (7) and evaluated.
Claims13
A detector-device for detecting attempts at fraud by varying the electrical properties of a connecting point (12) of a chip card (3) in an apparatus for reading and writing in a memory on said chip card (3) via an electric feed line (13) connected to said connecting point (12), said detector-device comprising:
- a resonance unit (6) and a measuring unit (7) connected to said resonance unit (6) wherein said resonance unit (6) has a resonator (1) that is coupled to said connecting point (12), said resonance unit (6) having electrical properties that are varied by said feed line (13) and detected by said measuring device (7).
Dependencies are inferred from the claim text.