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Smart Keys For Cars A smart key is a wireless car remote that functions without the traditional mechanical blade and can unlock the doors and pop the trunk from a distance. It also allows you to start your car without having to turn a key. Most smart keys have battery indicators which alert you to a low charge well ahead of time. Replacing the battery is an easy and simple procedure that doesn't require any special tools. Convenience Smart keys can open doors, trunks and turn on the engine of the vehicle without the driver needing to use a key made of metal. They also have features that can deter burglaries and thefts, including the panic key that makes noises to frighten potential thieves in remote areas such as garages that are underground. Key fobs accomplish all of these functions via radio transmissions between the car key fob and your car using low-power wireless technology. This is a great convenience, especially for those who are often in a hurry and don't have much time to spare. A smart key is usually made to look more like a plastic card than a key, and can be used to open the trunk or car's doors when the fob's button is pressed. Some smart keys feature a touchscreen that allows drivers to control their vehicle's settings, such as the climate and audio. The RFID signal transmitted between the key fob and the car is unique, encoded, and connected to the car's onboard computer. This makes it nearly impossible for hackers with the right skills to connect a stolen vehicle equipped with a key fob. These fobs can also be programmed to send a different frequency signal each time they're used so that the onboard computer isn't able to recognize the old one as the real signal. Security A lot of people are hesitant to make the switch to digital car keys for the reason that they are worried about security. While having a physical key fob in your hand can feel safer, it's important to recognize that digital keys are more secure than you might think. The digital keys are encrypted and the signal they transmit to a car is analyzed by an onboard computer. This means that even if your smart key fob is compromised the car won't start. Contrary to traditional key fobs smart keys make use of built-in antennas inside your vehicle and a radio pulse generator in the key fob that allows it to communicate with your vehicle and perform basic functions like unlocking or the start of it. This system allows you access to your vehicle without having a physical key inserted into the lock or ignition. If you lose your smart key, or if its battery dies there is an alternative method to open and start your vehicle. Emergency starting can be achieved by placing the key into a slot or holding it close to an area of the cockpit, where an inductive coil could transfer energy. Many smart keys also come with a low battery indicator that warns you before the key is completely dead. If you need to, you can easily replace the batteries on your own. Auto-adjusting settings Rather than using a physical key instead, the smart key makes use of radio waves to unlock and lock the vehicle. They can also remotely start your engine and track the vehicle's location in case you forget where it's parked. Certain smart keys have settings that automatically adjust the vehicle's exterior and interior based on which key is detected. For instance it can be detected the key you're using and then automatically adjust the seat position, mirror settings and the climate control. This is helpful if need to limit certain features or have multiple drivers. smart car key reprogramming of smart keys is the fact that they employ encryption to prevent theft, which isn't a possibility with traditional keys. This technology makes it difficult for cybercriminals to hijack a car by mimicking a valid frequency according to How Stuff Works Electronics. Smart keys transmit a unique, encrypted message every time the vehicle's remote or unlocked. Just like any battery-operated device, a smart key's battery will eventually run out of juice. Most systems come with backup systems to unlock the car and start it if the battery is not able to function. The emergency method can vary, but it usually involves holding the key within the proximity to the sensor for the lock on the car or pressing a button that activates the emergency starter. Battery Backup Modern smart keys, which are sometimes referred to as keyless entry systems or passive entry use a transmitter and receiver to unlock your car. The transmitter is contained inside the key fob that you carry around and the receivers are found inside and outside your vehicle. The receivers can detect the radio frequency signal sent by your smart key when you get close to the vehicle and then activate the doors and ignition. This system offers many advantages, including not having to search in the dark to find keys, however it is vulnerable to attacks of a certain type. For instance, if your key's battery is damaged or is stolen, a third party could pick up the low-frequency transmission signals from your key and unlock your car, reports How Stuff Works Electronics. This is why the majority of smart keys feature encrypted signals that ensure that hacking is difficult. However, these systems may also be impacted by electromagnetic fields produced by cell phones, computers and other devices. Therefore, if you notice that your smart key fob is not functioning as it should, it could be caused by an interference issue. In this instance you should avoid placing your key near any such device until the battery on the key has been replaced. The majority of smart keys will notify you when their batteries are not fully charged, and the replacement process is fairly simple.