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1. (WO2001033015) SECURE SYSTEM FOR CONTROLLING THE UNLOCKING OF AT LEAST ONE MOTOR VEHICLE OPENING PANEL

Pub. No.:    WO/2001/033015    International Application No.:    PCT/FR2000/003065
Publication Date: Fri May 11 01:59:59 CEST 2001 International Filing Date: Sat Nov 04 00:59:59 CET 2000
IPC: G07C 9/00
Applicants: VALEO ELECTRONIQUE
MENARD, Eric
SMITH, Collin
Inventors: MENARD, Eric
SMITH, Collin
Title: SECURE SYSTEM FOR CONTROLLING THE UNLOCKING OF AT LEAST ONE MOTOR VEHICLE OPENING PANEL
Abstract:
The invention concerns a system for controlling means for locking/unlocking at least a vehicle opening panel, in particular a motor vehicle, comprising transmission/reception means on-board the vehicle and transmission/reception means to be carried by the user and which, on receiving an interrogation signal transmitted by the vehicle transmitting/receiving means, are designed to transmit a reply signal capable of actuating the unlocking of the opening panel. The invention is characterised in that the transmission/reception means on-board the vehicle and the user transmission/reception means comprise each storage means forming a cyclic shift register wherein are stored at least a common pseudo-random code, the on-board transmission/reception means comprising means for transmitting an interrogation signal bearing said pseudo-random code, the user transmission/reception means comprising means for despreading the received signal if the pseudo-random code borne by said signal is synchronised with a corresponding pseudo-random code stored in the storage means and further comprising means for transmitting a reply signal bearing a pseudo-random code and which further bears a signature which is specific to said user transmission/reception means, the on-board transmission/reception means comprising means for despreading the received signal if the pseudo-random code is synchronised with a corresponding pseudo-random code stored in their storage means and for verifying whether the received signal bears the signature of the user transmission/reception means.