Secure wireless key system and method with dynamically adjustable modulation
US11217049B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2020 |
| Grant date | Jan 4, 2022 |
| Priority date | — |
| Expiry date | Nov 6, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C2009/00984
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system and method are described for securing a vehicle. For example, one embodiment of a method comprises: generating a secret related to a radio frequency (RF) signal characteristic to be transmitted by a key fob; securely sharing the secret between a vehicle and a wireless key fob; periodically transmitting a ping signal from the vehicle in a locked or inactive state; receiving a response ping signal to the ping signal, the response ping signal transmitted by the key fob; identifying at least a first RF signal characteristic associated with the response ping signal; determining whether the first RF signal characteristic is valid based on the secret; unlocking and/or activating the vehicle upon determining that the first RF signal characteristic is valid; and maintaining the locked or inactive state and/or requiring additional authentication if the first RF signal characteristic is invalid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.