Multi-frequency identification device
First Claim
1. In vehicle tracking system comprising a reader that operates on multiple frequencies and an RFID tag that operates on multiple frequencies, a method for secure vehicle identification, comprising:
- the tag engaging in a non-secure interaction with the reader over a first frequency;
the tag engaging in a secure interaction with the reader over a second frequency; and
the tag receiving authentication based on the non-secure and secure interaction.
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Accused Products
Abstract
The present invention comprises a radio frequency identification device that utilizes multiple operating frequencies. In one embodiment of the present invention, one frequency (e.g., an ultra-high frequency such as 915 MHz, 800 MHz, 915 MHz, or microwave frequency such as 2.45 GHz) is used for data transmission, and another frequency (e.g., a low or high frequency such as 13.56 MHz) is used for field penetration. In another embodiment, one frequency is used for reading information received from the multi-frequency identification device, and another frequency is used for writing to the multi-frequency identification device. In an additional embodiment, the multi-frequency identification device utilizes one antenna for all frequencies. In another embodiment, the multi-frequency identification device utilizes two or more antennas for different frequencies, and one common memory. In other embodiments, one or two digital parts, analog parts, antennas, and memories can be used.
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Citations
29 Claims
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1. In vehicle tracking system comprising a reader that operates on multiple frequencies and an RFID tag that operates on multiple frequencies, a method for secure vehicle identification, comprising:
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the tag engaging in a non-secure interaction with the reader over a first frequency; the tag engaging in a secure interaction with the reader over a second frequency; and the tag receiving authentication based on the non-secure and secure interaction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. In a vehicle tracking system an RFID system comprising a Radio Frequency Identification (RFID) reader that operates on multiple frequency bands and an RFID transponder that operates on multiple frequency bands, a method for secure vehicle identification, the method comprising:
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the RFID transponder engaging in a non-secure interaction with the reader over a first frequency band, the non-secure interaction comprising a first signal modulation technique; the RFID transponder engaging in a secure interaction with the reader over a second frequency band, the secure interaction comprising the first signal modulation technique, wherein the second frequency band limits the range of the system to a shorter distance relative to the first frequency band; and the RFID transponder receiving authentication based on the non-secure and secure interaction. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification