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Known as fobs, keyless entry or smart keys, they were first introduced by Mercedes in 1998. Key fobs that are controlled by computers accomplish many things, including locking and unlocking a car and even starting it.
They work by broadcasting a rolling encrypted signal. This makes them more resistant to cyber-savvy thieves.
Safety
A smart key programing key fob continuously communicates with a vehicle through radiofrequency signals. It sends out a low-power signal that, when pressed will instruct the car to open doors and start the engine. The car is programmed to recognize the unique encryption code of a specific key fob. This means that in the event that the keyfob is stolen, the car is unable to start.
A new hack allows thieves to exploit this communication. Relay attacks are carried out with devices that transmit at the same frequency as the key fob. A thief can place one of these gadgets in a pocket or hidden area to disable the lock command from a distance. How Stuff Works Electronics. It's a concern that could become more common as more drivers switch to smart keys.
A smart key fob is not just a security feature but it can simplify your life by automatically taking care of the needs of your vehicle. For example the key fob linked to your smartphone can detect your proximity and unlock the doors, meaning that you don't need to push the remote button. It can also sense that you are leaving the car and then automatically close it, so you aren't tempted to forget to lock the doors. A majority of smart key fobs have a battery indicator that alerts you when the battery is running low. The replacement of the battery in the majority of models is a simple and simple procedure that doesn't require any special tools.
Convenience
In contrast to a traditional key made of metal Smart keys do not require physical insertion into the ignition slot to unlock or start the car. BMW Group explains that the driver just needs to bring the key within reach of the car. Certain smart keys, like the Display Key, have small LCD touchscreen that gives users access to features such as locking, unlocking, and keyless start directly from their key fob, without needing to connect to the Bluetooth system in the car.
A smart key can also save drivers time by automating the locking of their car doors when they leave. This feature is offered in a number of vehicles, according to Consumer Reports, and can help get into tight parking spaces without accidentally hitting something or the person.
Furthermore, smart key systems typically do not send the same frequency signal over and over, as this could make them more vulnerable to relay attacks, explains Open Road Auto Group. Therefore it is impossible for a stolen car to be hotwired even if it's equipped with a smart key market-key because the encrypted signal that the key fob transmits is unique to each car. This makes it extremely difficult for thieves to steal a car.
Security
A few of the most advanced electronic features in today's newer vehicles are found in the key fob. These gadgets are capable of more than just locking and unlocking doors or making chirping noises to help drivers locate their vehicle in parking spaces. However many owners are unaware of the full capabilities.
Certain smart keys, for instance, will activate the automatic windows and sunroof of vehicles when pressed. One auto editor in CR walked into her Honda Accord to find the windows all down and the sunroof completely open. She was grateful for her Smart Key that automatically locked the car.
According to How Stuff Works, some smart keys employ computer-encrypted signals to protect against car thieves. This technology stops hotwiring in which thieves steal a vehicle's engine controller module (ECM) which is usually located at the front of the engine. The ECM regulates a variety of vital functions such as engine power, transmission control, and many more.
Smart keys also come with anti-theft codes as well as a unique security code for ID assigned to each key. This could disable the ignition when the wrong key is used. The security ID is a unique code that's transmitted from the ECM to the key when it's put into the ignition. It is then verified by a sensor inside the car.
Maintenance
Smart car key fobs do more than unlock the door. It can start your engine, and also activate suspension and brakes remotely. It can also provide information about your vehicle including fuel level and the temperature of your oil.
A smart car key fob, like any other electronic device requires regular maintenance in order to work efficiently. Key fobs that are modern have indicators for batteries that notify the driver when the battery is running low. Replacing the battery is an easy procedure, and no special tools are required.
In certain situations the smart key might stop working completely. If you suspect this is the case attempt to reset the smart key by exiting the vehicle, then returning inside. This will enable the car to understand that the key fob remains in the vehicle and let it to function again.

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