Radio Identification With an Additional Close-Range Check
First Claim
1. A method for radio identification with an additional close-range check, in which the following steps are carried out:
- activation of a transponder for the contactless reading of data stored in the transponder;
reading of the data by a reader for identification of the transponder wherein the following further steps are provided;
provision of a close-range status signal which indicates the close range of the reader;
detection of the close-range status signal by the transponder;
enabling of data transmission by the transponder for reading of the data stored in the transponder by the reader in reaction to the detection of the close-range status signal.
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Accused Products
Abstract
The invention relates to a method and a system for radio identification with an additional close-range check, which prevent misuse of a radio identification system and increase the security of radio identification. In particular, so-called relay attacks are to be largely prevented in passive entry systems. The method according to the invention firstly provides for activation of a transponder (S1) for reading of its data. After this step, an additional close-range status signal is provided (S2) which indicates the close range of a reader. Once the close-range status signal has been detected by a transponder (S3), data transmission for reading of the data stored in the transponder by the reader is possibly enabled in reaction to the detection of the close-range status signal (S4) and the data can be read by the reader for identification of the transponder (S5). The system according to the invention for radio identification with an additional close-range check consists of a reader for reading the data stored in a transponder and of an evaluation unit which is connected to the reader for identifying the transponder on the basis of the read data.
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Citations
13 Claims
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1. A method for radio identification with an additional close-range check, in which the following steps are carried out:
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activation of a transponder for the contactless reading of data stored in the transponder; reading of the data by a reader for identification of the transponder wherein the following further steps are provided; provision of a close-range status signal which indicates the close range of the reader; detection of the close-range status signal by the transponder; enabling of data transmission by the transponder for reading of the data stored in the transponder by the reader in reaction to the detection of the close-range status signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for radio identification with an additional close-range check, consisting of:
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a reader for the contactless reading of data stored in a transponder; an evaluation unit which is connected to the reader for identifying the transponder on the basis of the read data; a device for providing a close-range status signal which indicates the close range of the reader; at least one transponder, wherein the transponder is usually blocked against data transmission for reading of its data by the reader and wherein the transponder has a control circuit which enables data transmission in reaction to detection of the close-range status signal. - View Dependent Claims (9, 10, 11)
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12. A transponder for a radio identification system with an additional close-range check, comprising
an antenna for transmitting and receiving radio signals of the reader; -
an integrated circuit for controlling the data transmission, wherein the integrated circuit is usually blocked against data transmission; and a control circuit which is connected to the integrated circuit in order to enable the integrated circuit for data transmission for reading of the data by the reader in reaction to detection of a close-range status signal.
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13. A reader for a radio identification system with an additional close-range check, which comprises:
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a device for transmitting and receiving radio signals in order to read the data of a transponder; an evaluation unit for identifying the transponder on the basis of the read data; and a device for providing a close-range status signal in order to ensure reading of the data stored in the transponder only in close range of the reader.
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Specification