Method, device, and system for secure motor vehicle remote keyless entry
US7231041B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 2003 |
| Grant date | Jun 12, 2007 |
| Priority date | — |
| Expiry date | Sep 20, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C2009/00793
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Methods and apparatus are provided for sending an encrypted command message from a remote keyless entry device to a receiver in a motor vehicle. The method comprises defining a key generating key within the remote keyless entry device, and using that key generating key to generate a working key. The working key is transmitted from the remote keyless entry device to the receiver during a training session without transmitting the key generating key. The working key is modified each time the remote keyless entry device is placed in the training mode. After the training session, a message encrypted with the working key can be transmitted from the remote keyless entry device to the motor vehicle receiver where the encrypted message is decrypted with the working key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.