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US 5,883,443 AGranted
Countermeasure method and system for securing a remote keyless entry system
AssigneeUT Automotive Dearborn, Inc.
InventorMark M. Wilson
Life of this patent
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AssigneeUT Automotive Dearborn, Inc.
InventorMark M. Wilson
Estimating the term…
The present invention teaches a method for preventing the use of an unauthorized reproduction of a remote unlock signal. In this scenario, the unauthorized reproduction occurs by jamming the receiver from receiving the remote unlock signal while intercepting the remote unlock signal. Generally, the remote unlock signal is transmitted by a transmitter to the receiver within a vehicle having a lock, wherein the receiver initiates an unlock command in response to receiving the transmitted remote unlock signal, and the vehicle lock being mechanically actuated by a key or electronically initiated by the unlock command in a previous locking session. The method for preventing the use of an unauthorized reproduction of a remote unlock signal comprises the steps of sensing whether the vehicle lock is being mechanically actuated by the key in the previous locking session, generating a flag if the vehicle lock has been mechanically actuated by the key, and disabling the receiver from initiating the unlock command in response to receiving the remote unlock signal transmitted by the transmitter if the flag is generated.
A method for preventing access to a vehicle using an unauthorized reproduction of a remote unlock signal that is transmitted by a transmitter to a receiver supported by the vehicle having a lock, the receiver initiating an unlock command in response to receiving the transmitted remote unlock signal, the vehicle lock being mechanically actuated by a key or electronically initiated by the unlock command in a previous unlocking session, the method comprising the steps of:
A method for preventing access to a vehicle using an unauthorized reproduction of a first encrypted rolling code signal from a set of encrypted rolling code signals comprising a function unlock code and being transmitted by a remote transmitter to a receiver supported on the vehicle having a lock mechanically actuated by a key or electronically initiated by an unlock command in a previous unlocking session, the receiver initiating the unlock command in response to receiving the function unlock code, the method comprising the steps of:
A system for preventing access to a vehicle using an unauthorized reproduction of a remote unlock signal that is transmitted by a transmitter to a receiver supported by the vehicle having a lock, the receiver initiating an unlock command in response to receiving the transmitted remote unlock signal, the vehicle lock being mechanically actuated by a key or electronically initiated by the unlock command in a previous unlocking session, the system comprising:
Dependencies are inferred from the claim text.