RFID integrated circuit identifier self-check
First Claim
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1. A method for a Radio Frequency Identification (RFID) integrated circuit (IC) to avoid sending a corrupted identifier, the method comprising:
- receiving a command requesting a first identifier;
retrieving the first identifier and a check code from an IC nonvolatile memory, the check code based on and used to check the correctness of the first identifier;
determining, based on the check code, that the first identifier is corrupted; and
transmitting a reply to the command indicating that the first identifier is corrupted, wherein the reply includes at least one of an alternative identifier and a corruption indicator.
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Abstract
A Radio Frequency Identification (RFID) tag IC stores an identifier and a check code. The IC determines whether the stored identifier is corrupted by comparing it to the check code. If the stored identifier does not correspond to the check code then the IC may terminate operation or indicate an error. The IC may also reconstruct the correct identifier from the check code.
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Citations
20 Claims
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1. A method for a Radio Frequency Identification (RFID) integrated circuit (IC) to avoid sending a corrupted identifier, the method comprising:
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receiving a command requesting a first identifier; retrieving the first identifier and a check code from an IC nonvolatile memory, the check code based on and used to check the correctness of the first identifier; determining, based on the check code, that the first identifier is corrupted; and transmitting a reply to the command indicating that the first identifier is corrupted, wherein the reply includes at least one of an alternative identifier and a corruption indicator. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for a Radio Frequency Identification (RFID) integrated circuit (IC) to avoid sending a corrupted identifier, the method comprising:
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receiving a command requesting a first identifier; retrieving the first identifier and a check code from an IC nonvolatile memory, the check code based on and used to check the correctness of the first identifier; determining, based on the check code, that the first identifier is corrupted; and based on the corruption determination, refraining from replying to the command. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A complementary metal-oxide semiconductor (CMOS) Radio Frequency Identification (RFID) integrated circuit (IC) comprising:
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a nonvolatile memory storing a first identifier and a check code, the check code based on and used to check the correctness of the first identifier; and a processing block configured to; receive a command requesting the first identifier; retrieve the first identifier and the check code from the memory; determine, based on the check code, that the first identifier is corrupted; and based on the corruption determination, one of; respond to the command with a reply including at least one of an alternative identifier and a corruption indicator, and refrain from replying to the command. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification