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Method and apparatus for secure measurement certification

DC CAFC
  • US 5,828,751 A
  • Filed: 04/08/1996
  • Issued: 10/27/1998
  • Est. Priority Date: 04/08/1996
  • Status: Expired due to Term
First Claim
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1. A device for secure measurement acquisition and certification, comprising:

  • a sensor;

    a time generator for transmitting a representation of a time;

    a computing device, including a computer processor and a memory, coupled to receive a measurement signal representative of a physical measurement from the sensor and the representation of the time from the time generator, said computing device producing an augmented measurement including the measurement signal and the representation of the time, and performing a cryptographic operation on at least a portion of the augmented measurement to form a certifiable measurement;

    an output device, coupled to the computing device, for writing the certifiable measurement in response to a request for the certifiable measurement; and

    tamper resistance means for rendering at least one of the sensor, the time generator, and the computing device resistant to tampering.

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