Relay attack prevention using RSSIPPLX
US9558607B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 14, 2012 |
| Grant date | Jan 31, 2017 |
| Priority date | — |
| Expiry date | Mar 24, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C2009/00555
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The disclosed invention relates to a passive keyless entry receiver system having an application controller that is activated upon receipt of an entire payload of a data packet to determine if peak RSSI levels for a plurality of RSSI steps within the payload match an expected sequence of peak RSSI levels (i.e., if a fingerprint is genuine). The receiver system has a receiver that receives a wireless signal having a data packet with a plurality of power levels within a plurality of RSSI steps of the payload. The receiver system writes a plurality of peak RSSI levels to a plurality of RSSI peak payload registers that store the peak RSSI levels for RSSI steps of the payload. Once an entire payload of a data packet has been received an application controller determines if the peak payloads correspond to an expected sequence of power levels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.