Authorizing RFID reader and inhibiting skimming
US8797144B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2011 |
| Grant date | Aug 5, 2014 |
| Priority date | — |
| Expiry date | Jan 13, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10267
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An RFID reader system has an RFID tag and an RFID reader. The tag authorizes the RFID reader by receiving a plurality of successively-transmitted initial RFID read signals and determining respective initial-read signal power levels of the received initial RFID read signals. Using the determined initial-read signal power levels, a controller automatically selects an authorization sequence. A plurality of successively-transmitted authorization RFID signals are received sequentially, and respective authorization-signal power levels of the received authorization RFID read signals are determined. The determined authorization-signal power levels are automatically compared to the authorization sequence using the controller, so that the RFID reader is authorized if the determined authorization-signal power levels correspond to the authorization sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.