Patent ID: 7780083

Claim:
A device for identifying metallic foreign components which are fitted to an input and output device of a self-service machine, by third parties with fraudulent intent in order to spy-out information, characterized by a control unit with a central processor and a working memory, a sound card with an interface to the control unit and at least one output and at least one input; whereby the output of the sound card is connected to a first coil for generating a primary electromagnetic field to the output; and whereby the input of the sound card is connected to a second coil for detecting a secondary electromagnetic field which is generated by the interaction of the primary electromagnetic field with the metallic foreign components, and the sound card being actuated by the control unit via the interface in order to generate the primary electromagnetic field and an analog output signal been forwarded to the coil, and, when the secondary electromagnetic field is generated by metallic foreign components, an analog input signal being passed to the sound card by the second coil, and the sound card processing the signal further and forwarding the signal to the control unit, the control unit analyzing and evaluating the incoming signal to determine whether metallic foreign bodies are present; wherein the coil for generating the primary electromagnetic field and the coil for detecting the second electromagnetic field are arranged in the region of the input and output device of the self-service machine; and wherein the input and output device of the self-service terminal is a card-reading machine.