Method for initializing an anti-theft system of a motor vehicle
AssigneeSiemens Aktiengesellschaft
InventorNorbert Müller
Life of this patent
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Abstract
A number (n) of keys is assigned to an anti-theft system. In order to initialize the anti-theft system, at least the number minus one (n−1) keys must be present so that new coding data can be formed using the previous coding data. During the initialization, the number of all the authorized keys is written into each key. If the vehicle is stolen, the insurer of the vehicle can thus compare the number of authorized keys with the keys that are actually submitted.
Claims10
A method for initializing an anti-theft system of a motor vehicle, the anti-theft system having a total number of portable electronic keys which, when required, each independently emit a code signal as an authentication signal, the code signal being received by an electronic lock in the motor vehicle and compared with a setpoint code signal being one of stored and generated in the lock, the method which comprises:
- performing an initialization of the portable electronic keys and of the lock, which includes:
- choosing a new total number of all the portable electronic keys assigned to a lock of an anti-theft system;
- forming new coding data, the new coding data being formed using code signals from all but one, of the previous portable electronic keys and using code signals from the lock;
- storing the new coding data together with the new total number of the portable electronic keys, in all of the portable electronic keys and in the lock;
- and
- deactivating all the previously valid coding data in the portable electronic keys and in the lock.
Dependencies are inferred from the claim text.