| 摘要 |
<p>Methods and apparatuses are described for acquiring a physical measurement and for creating a cryptographic certification thereof, such that the measurement value and time can be verified by a party not present at the measurement. In one embodiment of the invention, the apparatus receives a certification request at an input device (12), and the certified measurement is generated by a computing device including a cryptoprocessor (10). The computing device receives a signal from a sensor (8) and a time from a clock (20) or a signal receiver (24). The certified measurement may be encrypted using a key stored in memory (40), and is outputted to an output device (100). The certified measurement may include corroborative information for associating the actual physical measurement process with the certified measurement. The external timing signals may also be used to determine the location of the measurement certification device for inclusion in the certified measurement.</p> |
