Security system
1 Assignment
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Accused Products
Abstract
A safety system including an electronic key that has a transmitter, and a protected object having a radio base station which includes a receiver, is provided. The transmitter and the receiver are designed to communicate in order to exchange authentication data. The radio base station regularly monitors the natural high frequency (HF) signal level received on the part of the receiver and detects interferences in the natural HF signal level, so as to make possible the detection of a relay station.
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Citations
18 Claims
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1-9. -9. (canceled)
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10. A safety system, comprising:
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an electronic key having a transmitter; and
a secured object having a radio base station that includes a receiver, wherein the receiver communicates with the transmitter of the electronic key in order to exchange authentication data, and wherein the radio base station monitors a natural high frequency signal level received by the receiver, and wherein the radio base station detects an interference in the natural high frequency signal level in order to detect a relay station. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method for performing a security monitoring by a safety system including an electronic key that has a transmitter and a radio base station that includes a receiver, the radio base station being associated with a protected object, the method comprising:
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transmitting authentication data from the transmitter to the receiver;
monitoring by the radio base station a natural high frequency signal level received by the receiver; and
detecting an interference in the natural high frequency signal level, whereby the interference is used to determine an existence of a relay station.
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Specification