Patent ID: 7167077
Filing Date: 2007-01-23
Classification: G06K,H01L

Abstract:
1. A portable data carrier system having a control unit, a body giving the data carrier system its external form, a means for permitting information exchange between the control unit and an external access unit, and a data memory integrated in a chip, in which security-relevant data can be stored, a security device for transmitting a security signal, an influencing means integrated in the body and connected with the security device for influencing the security signal, a detection means of the stated security device for detecting the security signal influenced by the influencing means, an evaluation means for evaluating the detected, influenced security signal, and a blocking means for blocking a security-critical operating state of the data carrier system if the evaluation means does not recognize a security signal influenced in the expected way, characterized in that the security device is connected non-electrically with the influencing means, the transmitted security signal contains a bit string as the information, and the influencing means is designed to transmit a bit string altered from said bit string in a way predictable for the evaluation means to the detection means.