Method of making secure a hands-free access and/or starting system for a motor vehicle
First Claim
1. A method of making secure a hands-free access and/or starting system for a motor vehicle, the hands-free system comprising a control unit (2) placed in the vehicle and a portable identifier (1) suitable for communicating remotely and cordlessly with the control unit in order to be authenticated, the method being characterized in that it consists in recording (30) a first data item in the identifier by communicating with the control unit in response to detecting starting of the vehicle engine, and in recording (60) a second data item to replace the first data item in the identifier by communicating with the control unit in response to detecting normal stopping of the vehicle engine.
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Abstract
The method of making secure a hands-free access and/or starting system for a motor vehicle, the hands-free system comprising a control unit (2) placed in the vehicle and a portable identifier (1) suitable for communicating remotely and cordlessly with the control unit in order to be authenticated, the method consists in recording (30) a first data item in the identifier by communicating with the control unit in response to detecting starting of the vehicle engine, and in recording (60) a second data item to replace the first data item in the identifier by communicating with the control unit in response to detecting normal stopping of the vehicle engine. In the case of lending of the vehicle, the borrower of the vehicle must return an identifier containing the second data item in order to prove that he left the vehicle in an authorized manner.
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Citations
9 Claims
- 1. A method of making secure a hands-free access and/or starting system for a motor vehicle, the hands-free system comprising a control unit (2) placed in the vehicle and a portable identifier (1) suitable for communicating remotely and cordlessly with the control unit in order to be authenticated, the method being characterized in that it consists in recording (30) a first data item in the identifier by communicating with the control unit in response to detecting starting of the vehicle engine, and in recording (60) a second data item to replace the first data item in the identifier by communicating with the control unit in response to detecting normal stopping of the vehicle engine.
Specification