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Some cars [5] implement the child lock control as a rotary mechanism which can only be operated with a key. This design ensures the child lock remains in position, preventing passengers from changing the lock position when the door is open. Once the door is closed, control of these two mechanical type child locks is completely inaccessible to ...
Also, they may be operated by remote control, with the transmitter often integrated into the main vehicle access and a key for the ignition. Additionally, rear passenger doors are frequently fitted with child safety locks to prevent children from exiting the vehicle unless the door is opened from the exterior. These are also frequently used on ...
A security concern with any remote entry system is a spoofing technique called a replay attack, in which a thief records the signal sent by the key fob using a specialized receiver called a code grabber, and later replays it to open the door. To prevent this, the key fob does not use the same unlock code each time but a rolling code system; it ...
Pressing a button on the key unlocks all of the car doors. Another button locks the car. In 1980, Ford Motor Company introduced an external keypad-type keyless entry system, wherein the driver entered a numeric combination —either pre-programmed at the factory or one programmed by the owner— to unlock the car without the key.
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Opening is achieved by an emergency (fully mechanical) key blade usually hidden in the smart key. On many cars emergency starting is achieved by use of an inductive coupling . The user either has to put the key in a slot or hold it near a special area on the cockpit, where there is an inductive coil hidden behind which transfers energy to a ...
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