Method and apparatus for secure measurement certification
DC CAFCFirst Claim
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 being based at least in part on a physical measurement from the sensor and (ii) a second signal being based at least in part on a time from the time generator;
said computing device configured for generating an augmented measurement based on the digital signal and the second signal, and for performing a cryptographic operation on at least a portion of the augmented measurement to generate 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.
5 Assignments
Litigations
4 Petitions
Accused Products
Abstract
The invention relates to methods and apparatuses for acquiring a physical measurement, and for creating a cryptographic certification of that measurement, such that its value and time can be verified by a party that was not necessarily present at the measurement.
The certified measurement may also include corroborative information for associating the actual physical measurement process with the certified measurement. Such corroborative information may reflect the internal or external state of the measurement certification device, as well as witness identifiers of any persons that may have been present at the measurement acquisition and certification.
The certification may include a signal receiver to receive timing signals from a satellite or other external source. The external timing signals may be used to generate the time included in the certified measurement, or could be used to determine the location of the measurement certification device for inclusion in the certified measurement.
28 Citations
25 Claims
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1. A device for secure measurement acquisition and certification, comprising:
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(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 being based at least in part on a physical measurement from the sensor and (ii) a second signal being based at least in part on a time from the time generator;
said computing device configured for generating an augmented measurement based on the digital signal and the second signal, and for performing a cryptographic operation on at least a portion of the augmented measurement to generate 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus comprising:
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an input device configured to receive a first signal and a second signal, the first signal being based at least in part on a physical measurement, and the second signal being based at least in part on a time; and a processor in communication with the input device and configured to; generate an augmented measurement based at least in part on the first signal and the second signal, and perform a cryptographic operation on at least a portion of the augmented measurement to generate a certifiable measurement. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A method comprising:
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receiving, by a computing device via an input device, a first signal that is based at least in part on a physical measurement; receiving, by the computing device via the input device, a second signal that is based at least in part on a time; generating, by the computing device, an augmented measurement based at least in part on the first signal and the second signal; and performing, by the computing device using a cryptographic processor, a cryptographic operation on at least a portion of the augmented measurement to generate a certifiable measurement. - View Dependent Claims (21, 22, 23, 24, 25)
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Specification