Method and apparatus for secure measurement certification
DC CAFCFirst Claim
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.
11 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.
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Citations
174 Claims
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1. A device for secure measurement acquisition and certification, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A device for secure measurement acquisition and certification, comprising:
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a sensor; a signal receiver; and a computing device, including a computer processor and a memory, coupled to receive a measurement signal representative of a physical parameter from the sensor and an external timing signal from the signal receiver, said computing device forming an augmented measurement including the measurement signal and a representation of the external timing signal, and performing a cryptographic operation on at least a portion of the augmented measurement to form a certifiable measurement. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56)
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57. A device for secure measurement acquisition and certification, comprising:
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a sensor; a time generator for transmitting a representation of a time; a signal generator; and a computing device, including a computer processor and a memory, coupled to receive a measurement signal representative of a physical parameter from the sensor, the representation of the time from the time generator, and a corroborative datum indicative of an operating condition of the device from the signal generator, said computing device forming an augmented measurement including the measurement signal, the representation of the time, and the corroborative datum, and performing a cryptographic operation on at least a portion of the augmented measurement to form a certifiable measurement. - View Dependent Claims (58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93)
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94. A method for measuring and certifying a physical parameter, comprising the steps of:
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measuring a physical parameter to provide a measurement signal representative thereof; generating a representation of a time; producing an augmented measurement including the measurement signal and the representation of the time; performing a cryptographic operation on at least a portion of the augmented measurement to form a certifiable measurement; and outputting the certifiable measurement to a local output device; at least one of the steps of measuring the physical parameter, generating the representation of the time, producing the augmented measurement, and performing the cryptographic operation being performed in a tamper-resistant environment. - View Dependent Claims (95, 96, 97, 98, 99, 100, 101)
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102. A method for measuring and certifying a physical parameter, comprising the steps of:
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measuring a physical parameter to provide a measurement signal representative thereof; receiving an external timing signal; producing an augmented measurement including the measurement signal and a representation of the external timing signal; performing a cryptographic operation on at least a portion of the augmented measurement to form a certifiable measurement; and outputting the certifiable measurement. - View Dependent Claims (103, 104, 105, 106, 107, 108)
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109. A method for measuring and certifying a physical parameter, comprising the steps of:
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measuring a physical parameter to provide a measurement signal representative thereof; generating a representation of a time; generating a corroborative datum indicative of an operating condition of the device; producing an augmented measurement including the measurement signal, the representation of the time, and the corroborative datum; performing a cryptographic operation on at least a portion of the augmented measurement to form a certifiable measurement; and outputting the certifiable measurement. - View Dependent Claims (110, 111, 112, 113, 114, 115, 116, 117)
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118. A device for secure measurement acquisition and certification, comprising:
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a sensor; a time generator for transmitting a representation of a time, the time generator including a signal receiver for receiving an external timing signal; 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; and an output device, coupled to the computing device, for writing the certifiable measurement in response to a request for the certifiable measurement. - View Dependent Claims (119, 120, 121, 122)
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123. A device for secure measurement acquisition and certification, comprising:
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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 a request for a certifiable measurement according to a predetermined schedule, 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 the certifiable measurement; and an output device, coupled to the computing device, for writing the certifiable measurement in response to the request for the certifiable measurement.
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124. A device for secure measurement acquisition and certification, comprising:
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a sensor; a time generator for transmitting a representation of a time; a computing device, including a computer processor and a memory, the memory storing a device identification, the computer processor and the 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 device identification, 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; and an output device, coupled to the computing device, for writing the certifiable measurement in response to a request for the certifiable measurement.
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125. A device for secure measurement acquisition and certification, comprising:
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a sensor; a time generator for transmitting a representation of a time; an input device for receiving a request for a certifiable measurement; 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 the certifiable measurement; and an output device, coupled to the computing device, for writing the certifiable measurement in response to the request for the certifiable measurement. - View Dependent Claims (126, 127, 128, 129, 130, 131)
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132. A device for secure measurement acquisition and certification, comprising:
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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; and a transmitter, coupled to the computing device, for transmitting the certifiable measurement in response to a request for the certifiable measurement.
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133. A device for secure measurement acquisition and certification, comprising:
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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 from the sensor and the representation of the time from the time generator, said measurement signal being representative of a physical measurement and a location, 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; and an output device, coupled to the computing device, for writing the certifiable measurement in response to a request for the certifiable measurement. - View Dependent Claims (134, 135)
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136. A device for secure measurement acquisition and certification, comprising:
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a sensor; a time generator for transmitting a representation of a time; a signal generator for providing a corroborative datum indicative of an operational condition of the device; a computing device, including a computer processor and a memory, coupled to receive a measurement signal representative of a physical measurement from the sensor, the representation of the time from the time generator and the corroborative datum from the signal generator, said computing device producing an augmented measurement including the measurement signal, the representation of the time and the corroborative datum, and performing a cryptographic operation on at least a portion of the augmented measurement to form a certifiable measurement; and an output device, coupled to the computing device, for writing the certifiable measurement in response to a request for the certifiable measurement. - View Dependent Claims (137, 138, 139, 140, 141)
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142. A device for secure measurement acquisition and certification, comprising:
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a sensor; a signal receiver; and a computing device, including a computer processor and a memory, coupled to receive a measurement signal representative of a physical parameter from the sensor and an external timing signal from the signal receiver, said computing device producing a request for a certifiable measurement according to a predetermined schedule, forming an augmented measurement including the measurement signal and a representation of the external timing signal, and performing a cryptographic operation on at least a portion of the augmented measurement to form the certifiable measurement, said computing device further forming the certifiable measurement in response to the request for the certifiable measurement.
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143. A device for secure measurement acquisition and certification, comprising:
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a sensor; a signal receiver; and a computing device, including a computer processor and a memory, coupled to receive a measurement signal representative of a physical parameter from the sensor and an external timing signal from the signal receiver, said computing device forming an augmented measurement including a device identification stored in the memory, the measurement signal and a representation of the external timing signal, and performing a cryptographic operation on at least a portion of the augmented measurement to form the certifiable measurement.
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144. A device for secure measurement acquisition and certification, comprising:
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a sensor; an input device for receiving a request for a certifiable measurement; a signal receiver; a computing device, including a computer processor and a memory, coupled to receive a measurement signal representative of a physical parameter from the sensor and an external timing signal from the signal receiver, said computing device forming an augmented measurement including the measurement signal and a representation of the external timing signal, and performing a cryptographic operation on at least a portion of the augmented measurement to form the certifiable measurement in response to the request for the certifiable measurement. - View Dependent Claims (145, 146, 147, 148, 149, 150)
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151. A device for secure measurement acquisition and certification, comprising:
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a sensor; a signal receiver; a computing device, including a computer processor and a memory, coupled to receive a measurement signal representative of a physical parameter from the sensor and an external timing signal from the signal receiver, said computing device forming an augmented measurement including the measurement signal and a representation of the external timing signal, and performing a cryptographic operation on at least a portion of the augmented measurement to form a certifiable measurement; and a transmitter, coupled to the computing device, for transmitting the certifiable measurement in response to a request for the certifiable measurement.
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152. A device for secure measurement acquisition and certification, comprising:
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a sensor; a signal receiver; and a computing device, including a computer processor and a memory, coupled to receive a measurement signal representative of a physical parameter from the sensor and an external timing signal from the signal receiver, said external timing signal being representative of a location, said computing device forming an augmented measurement including the measurement signal and a representation of the external timing signal, and performing a cryptographic operation on at least a portion of the augmented measurement to form a certifiable measurement. - View Dependent Claims (153, 154)
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155. A device for secure measurement acquisition and certification, comprising:
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a sensor; a signal receiver; a signal generator for providing a corroborative datum indicative of an operational condition of the device; and a computing device, including a computer processor and a memory, coupled to receive a measurement signal representative of a physical parameter from the sensor, an external timing signal from the signal receiver and the corroborative datum from the signal generator, said computing device forming an augmented measurement including the measurement signal, a representation of the external timing signal and the corroborative datum, and performing a cryptographic operation on at least a portion of the augmented measurement to form a certifiable measurement. - View Dependent Claims (156, 157, 158, 159, 160)
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161. A device for secure measurement acquisition and certification, comprising:
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a sensor; a time generator for transmitting a representation of a time, the time generator including a signal receiver for receiving an external timing signal; a signal generator; and a computing device, including a computer processor and a memory, coupled to receive a measurement signal representative of a physical parameter from the sensor, the representation of the time from the time generator and a corroborative datum indicative of an operating condition of the device from the signal generator, said computing device forming an augmented measurement including the measurement signal, the representation of the time and the corroborative datum, and performing a cryptographic operation on at least a portion of the augmented measurement to form a certifiable measurement. - View Dependent Claims (162, 163, 164, 165)
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166. A device for secure measurement acquisition and certification, comprising:
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a sensor; a time generator for transmitting a representation of a time; a signal generator; and a computing device, including a computer processor and a memory, coupled to receive a measurement signal representative of a physical parameter from the sensor, the representation of the time from the time generator, and a corroborative datum indicative of an operating condition of the device from the signal generator, said computing device producing a request for a certifiable measurement according to a predetermined schedule, to form an augmented measurement including the measurement signal, the representation of the time and the corroborative datum, and performing a cryptographic operation on at least a portion of the augmented measurement to form the certifiable measurement, said computing device further forming the certifiable measurement in response to a request for the certifiable measurement.
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167. A device for secure measurement acquisition and certification, comprising:
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a sensor; a time generator for transmitting a representation of a time; a signal generator; and a computing device, including a computer processor and a memory, the memory storing a device identification, the computer processor and the memory coupled to receive a measurement signal representative of a physical parameter from the sensor, the representation of the time from the time generator and a corroborative datum indicative of an operating condition of the device from the signal generator, said computing device forming an augmented measurement including the device identification, the measurement signal, the representation of the time and the corroborative datum, and performing a cryptographic operation on at least a portion of the augmented measurement to form a certifiable measurement.
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168. A device for secure measurement acquisition and certification, comprising:
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a sensor; an input device for receiving a request for a certifiable measurement, the input device including a signal receiver; a time generator for transmitting a representation of a time; a signal generator; and a computing device, including a computer processor and a memory, coupled to receive a measurement signal representative of a physical parameter from the sensor, the representation of the time from the time generator and a corroborative datum indicative of an operating condition of the device from the signal generator, said computing device forming an augmented measurement including the measurement signal, the representation of the time and the corroborative datum, and performing a cryptographic operation on at least a portion of the augmented measurement to form the certifiable measurement, said computing device further forming the certifiable measurement in response to the request for the certifiable measurement.
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169. A device for secure measurement acquisition and certification, comprising:
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a sensor; a time generator for transmitting a representation of a time; a signal generator; a computing device, including a computer processor and a memory, coupled to receive a measurement signal representative of a physical parameter from the sensor, the representation of the time from the time generator and a corroborative datum indicative of an operating condition of the device from the signal generator, said computing device forming an augmented measurement including the measurement signal, the representation of the time and the corroborative datum, and performing a cryptographic operation on at least a portion of the augmented measurement to form a certifiable measurement; and a transmitter for transmitting the certifiable measurement.
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170. A device for secure measurement acquisition and certification, comprising:
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a sensor; a time generator for generating a time signal and a location signal; a signal generator; and a computing device, including a computer processor and a memory, coupled to receive a measurement signal representative of a physical parameter from the sensor, the time signal from the time generator, the location signal from the time generator and a corroborative datum indicative of an operating condition of the device from the signal generator, said computing device forming an augmented measurement including the measurement signal, the time signal, the location signal and the corroborative datum, and performing a cryptographic operation on at least a portion of the augmented measurement to form a certifiable measurement. - View Dependent Claims (171, 172)
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173. A device for secure measurement acquisition and certification, comprising:
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a sensor; a time generator for transmitting a representation of a time; a signal generator including a sensor responsive to an internal state of the device; and a computing device, including a computer processor and a memory, coupled to receive a measurement signal representative of a physical parameter from the sensor, the representation of the time from the time generator and a corroborative datum indicative of an operating condition of the device from the signal generator, said computing device forming an augmented measurement including the measurement signal, the representation of the time and the corroborative datum, and performing a cryptographic operation on at least a portion of the augmented measurement to form a certifiable measurement.
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174. A device for secure measurement acquisition and certification, comprising:
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a sensor; a time generator for transmitting a representation of a time; a signal generator including an input station for receiving a witness identifier; and a computing device, including a computer processor and a memory, coupled to receive a measurement signal representative of a physical parameter from the sensor, the representation of the time from the time generator, the witness identifier from the signal generator and a corroborative datum indicative of an operating condition of the device from the signal generator, said computing device forming an augmented measurement including the measurement signal, the representation of the time, the witness identifier and the corroborative datum, and performing a cryptographic operation on at least a portion of the augmented measurement to form a certifiable measurement.
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Specification