• US 20090313473A1
  • Filed: 06/24/2009
  • Published: 12/17/2009
  • Est. Priority Date: 04/08/1996
  • Status: Active Grant
First Claim
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1. A device for secure measurement acquisition and certification, comprising:

  • (a) a sensor;

    (b) a time generator;

    (c) a computing device, including a computer processor and a memory, coupled to receive (i) a digital signal representative of a physical measurement from the sensor and (ii) a time from the time generator;

    said computing device configured for forming an augmented measurement including the digital signal and the time, and for performing a cryptographic operation on at least a portion of the augmented measurement to form a certified measurement; and

    (d) an output device, coupled to the computing device, for writing the certified measurement in response to a certified measurement request;

    wherein the sensor, the time generator, and the computing device are configured to be resistant to tampering.

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