Three dimensional RF signatures
US9013308B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2012 |
| Grant date | Apr 21, 2015 |
| Priority date | — |
| Expiry date | Nov 13, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/07767
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Method and systems to detect tampering in a physical article are described herein. A method includes receiving, at a first point in time, at least two response signals from at least one RF tag in a set of RF tags associated with the physical article; forming a first response signature for the physical article based on the received response signals; receiving a second response signal from at least one other RF tag in the set of RF tags associated with the physical article at a second point in time; assessing a relative spacing between the RF tags associated with the physical article has changed from the first point in time to the second point in time; and determining tampering of the physical article as a result of the spacing assessment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.