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Random code for device identification

  • US 6,888,898 B1
  • Filed: 05/25/2000
  • Issued: 05/03/2005
  • Est. Priority Date: 05/25/2000
  • Status: Expired due to Term
First Claim
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1. A wireless communications system comprising:

  • a transmitter circuit for transmitting information and configured to generate a random identifier code having randomness that is derived from manufacturing tolerances associated with components included in the transmitter circuit, wherein the random identifier code is included in the transmitted information, the generation of the random identifier code being configured to repeatedly obtain a same result, wherein the transmitter circuit includes a microcontroller unit having a first input/output (I/O) port, wherein in response to detecting an event responsive to the manufacturing tolerances being detected at the first I/O port, a process running in the microcontroller unit generates the random identifier code.

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