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Smart Keys For Cars Smart keys are wireless remotes that unlock doors and pop the trunk without the necessity of a traditional mechanical blade. It also allows you to start your car without needing to turn a key. Most smart keys have battery indicators that warn you of the low battery well in advance. It's simple to replace the battery with no special tools. Convenience Smart keys can unlock doors and trunks as well as turn on the engine of the vehicle without the need to use a key made of metal. They also come with features that are designed to help deter break-ins and vehicle theft, such as the panic button, which creates a loud sound to deter people who may be suspicious of thieves in isolated areas, such as underground garages that are parking. Key fobs can do all this by sending an electronic signal between the car and the key fob by using wireless technology that is low-power. This is a great convenience, particularly for drivers who are always in motion and don't have time to spare. Smart keys generally look more like plastic cards than actual keys. They can be used to open the trunk or doors when the button is pressed on the fob. Some of them even have an integrated touchscreen that allows users to control specific settings on their vehicle, including audio and climate. The RFID signal that is sent between the key fob and a car is unique, secure and connected to the onboard computer making it nearly impossible for hackers with the latest technology to hotwire a stolen vehicle equipped with one. They can also be programmed to send a different frequency signal each time they're used so that the onboard computer doesn't recognize that old one as the genuine signal. Security A lot of people are hesitant to adopt digital keys as they are worried about security. While having a physical fob at hand might feel safer the digital keys are more secure than the majority of people believe. The digital keys are secured and the signal they send to a car is analyzed by an onboard computer. The vehicle won't be able to start if the smart fob is damaged. Smart keys, unlike traditional keys, operate by using the built-in antennas in your car to connect with it, and perform functions such as unlocking and starting your vehicle. This system lets you gain access to your vehicle without an actual key that you insert into the lock or ignition. If you lose your smart key, or if its battery goes out the majority of systems provide an alternative way to open and start your vehicle. Emergency starting can be accomplished by inserting the key into a slot, or holding it close to an space in the cockpit where an inductive coil will transfer energy. Additionally, the majority of smart keys have a low-battery indicator that warns you before it is completely dead. You can replace the battery on your own should you need to. Auto-adjusting settings Instead of using the physical keys for your car, smart keys use radio waves to unlock and lock the car. The smart key is also able to remotely start the engine and monitor the location of your vehicle if you don't remember where you parked it. Certain smart key s come with settings that automatically adjust your vehicle's exterior and interior based on the key you've chosen to use. The car will adjust the position of the seat or mirror settings as well as the temperature control based on which key is being used. This is helpful if you have multiple drivers or want to limit certain features when lending your car to a new driver. Smart keys also have the benefit of using encryption to protect against theft. This isn't possible with traditional keys. This technology makes it difficult for criminals with a technological edge to take over a vehicle by using a valid frequency, reports How Stuff Works Electronics. Smart keys transmit a distinct encrypted message each time the remote is unlocked. As with any other device powered by batteries the battery in a smart key will eventually deplete its juice. Most of the systems are designed with a backup strategy to unlock and start the car when the battery is not working. The emergency method differs, but usually involves either holding the keys within the range of the lock sensor or pressing an appropriate button on the key which activates the emergency starter. Battery Backup Modern smart keys, sometimes referred to as keyless entry systems or passive entry, make use of a receiver and transmitter to unlock your vehicle. The transmitter is in the key fob you carry around, and the receivers can be found both inside and outside your car. When you approach the vehicle the radio frequency signal from your smart key is recognized by the receivers and activates the doors and ignition. This system has many advantages, like not having to search in the dark for keys, however it is susceptible to certain types of attacks. For instance, if a key's battery is damaged or is lost, another person could pick up the low frequency transmission signals from your key and then open your car, reports How Stuff Works Electronics. The majority of smart keys come with encrypted signals, making hacking more difficult. If you notice that your smart key fob you purchased does not work properly, this could be due to an issue with interference. In this case you should not place your key near any device until the battery of the fob has been replaced. Most smart keys will alert you when their batteries are depleted and the replacement procedure is relatively easy.