RF Transponder for Off-Line Authentication of a Source of a Product Carrying the Transponder
First Claim
1. A transponder of a radio frequency identification (RFID) system, the transponder comprising control circuitry, a response signal generating arrangement and a memory arrangement connected to the control circuitry;
- the memory arrangement comprising at least a first part and a second part;
the first part comprising unique identification data (UID) relating to the transponder and which is permanently stored in the first part of the memory arrangement at manufacture of the transponder;
the second part being configured to be written to, after manufacture of the transponder; and
the control circuitry being configured after energization of the transponder, to cause the response signal generating arrangement to generate a first response signal modulated with data comprising data in the first part and data in the second part, to be transmitted by the transponder.
1 Assignment
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Accused Products
Abstract
A transponder (28) of a radio frequency identification (RFID) system comprises control circuitry, a response signal generating arrangement and a memory arrangement (22) connected to the control circuitry. The memory arrangement comprises at least a first part (42) and a second part (44). The first part (42) comprises unique identification data (UID) (70) relating to the transponder and which is permanently stored in the first part of the memory arrangement at manufacture of the transponder. The second part (44) is configured to be written to, after manufacture of the transponder. The control circuitry is configured, after energization of the transponder, to cause the response signal generating arrangement automatically to generate a first response signal modulated with data in the first part and data in the second part, to be transmitted by the transponder.
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Citations
20 Claims
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1. A transponder of a radio frequency identification (RFID) system, the transponder comprising control circuitry, a response signal generating arrangement and a memory arrangement connected to the control circuitry;
- the memory arrangement comprising at least a first part and a second part;
the first part comprising unique identification data (UID) relating to the transponder and which is permanently stored in the first part of the memory arrangement at manufacture of the transponder;
the second part being configured to be written to, after manufacture of the transponder; and
the control circuitry being configured after energization of the transponder, to cause the response signal generating arrangement to generate a first response signal modulated with data comprising data in the first part and data in the second part, to be transmitted by the transponder. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
- the memory arrangement comprising at least a first part and a second part;
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19. A method of tagging an article, the method comprising the steps of, at a source of the article, applying to the article a transponder comprising control circuitry, a response signal generating arrangement and a memory arrangement connected to the control circuitry, the memory arrangement comprising at least a first part and a second part, the first part comprising unique identification data (UID) relating to the transponder and which is permanently stored in the first part of the memory arrangement at manufacture of the transponder;
- and writing second part data to the second part of the memory arrangement, the second part data comprising data resulting from mathematical processing of a least two of the first part data, data relating to the source and data relating to the article.
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20. A method of reading a transponder comprising the steps of causing the transponder after being exposed to an energizing signal automatically to transmit a first response signal comprising first part data relating to the transponder and permanently stored in a first part of a memory arrangement of the transponder at manufacture of the transponder and second part data subsequently written into the memory arrangement at a source of the article, the second part data comprising data derived from mathematical processing of at least two of the first part data, data relating to the source and data relating to the article;
- and receiving the first response signal at a reader and processing the first and second part data to confirm the authenticity of at least one of the transponder and the source.
Specification