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Smart Keys For Cars Smart keys are wireless remotes that can open doors and pop the trunk without the need for a traditional mechanical blade. It also lets you start the vehicle without having to turn the key. Most smart keys come with indicators for battery levels which alert you to a low charge well in advance. It's easy to replace the battery without any special tools. Convenience Smart keys are designed to open trunks and doors, turn on the car engine and turn on the ignition without needing to use a traditional key. They also come with features specifically designed to stop burglaries and theft of vehicles, such as a panic button that makes noise to scare away possible thieves or suspicious individuals in areas with no security, such as underground garages with parking. The key fobs perform all these things by sending an electronic signal between the car and the key fob via low-power wireless technology. This is a fantastic feature, particularly for drivers on the move and do not have much time. Smart keys generally look more like plastic cards than actual keys. They are used to unlock the trunk or doors when the button is pressed on the fob. Some smart keys have touchscreens that allow drivers to control the car's settings, including climate and audio. The RFID signal sent between the car and a key fob is unique, encoded and connected to the vehicle's onboard computer. This makes it impossible for criminals with a technological background to wire a stolen vehicle equipped with the key fob. The fobs can also be programmed to send a new frequency signal every time they're used. This means that the computer in the car won't be able to recognize an old signal as the “true” signal. Security A lot of people are hesitant to adopt digital keys because they are worried about security. While having a physical fob in hand can feel more secure, digital keys are actually more secure than many think. They're encrypted and the signal that they send to a vehicle is analyzed with a specially-designed onboard computer. This means that even if your key fob is compromised, the car will never start. Contrary to traditional key fobs smart keys make use of built-in antennas in your car and a radio pulse generator within the key fob to communicate with your vehicle, and perform standard functions like unlocking and the start of it. This allows you to access your vehicle without having to insert an actual key into the lock or ignition which can be an issue. Most systems offer an alternative method of opening and starting your vehicle if you lose your smartkey or if the battery goes out. For instance the emergency start can be done by putting the key in an opening or holding it in a particular spot in the cockpit, where an inductive coil which can transfer energy is hidden. Additionally, the majority of smart keys have a low battery indicator that warns you before the battery goes out completely. If necessary, you can easily replace the batteries yourself. Auto-adjusting settings Instead of a physical car key, smart keys use radio waves to unlock and lock the vehicle. They can also remotely start your engine and keep track of the location of the vehicle in case you lose track of where it's located. Some smart keys are programmed to automatically adjust the interior and exterior of the vehicle based on the key detected. The car can automatically adjust seat position or mirror settings as well as climate control depending on the type of key used. This is very useful if have multiple drivers or want to limit certain features when you loan your car to a novice driver. Another benefit of smart keys is the fact that they employ encryption to prevent theft, something that isn't possible with traditional keys. This makes it difficult for tech-savvy criminals to take over a vehicle by using a valid frequency as reported by How Stuff Works Electronics. smart car key fob transmit a unique encrypted signal each time the vehicle is unlocked or remotely opened. Just like any battery-operated device the battery in a smart key will eventually be depleted of power. The majority of systems have an emergency system that allows you to open the car's doors and start it if the battery is not able to function. The emergency method is different however, it is usually keeping the key within the range of the lock sensor or pressing an appropriate button on the key that triggers the emergency starter. Battery backup Modern smart keys, which are also known as keyless entry systems or passive entry, make use of a receiver and transmitter to unlock your car. The transmitter is built into the key fob you carry with you and the receivers are located within your car and around the outside of it. The receivers are able to detect the radio frequency signals sent by your smart key when you approach the vehicle and activate the ignition and doors. Although this system has many advantages, including the ability to not have to search in the dark for a key, it can be vulnerable to certain types of attacks. For instance, if a key's battery fails or is lost, someone else could pick up the low frequency transmission signals that are transmitted by your key and then open your car, according to How Stuff Works Electronics. This is why a majority of smart keys have encrypted signals that ensure that hacking is difficult. However, these systems could also be impacted due to electromagnetic fields generated by computers, cell phones and other devices. Therefore, if you notice that your smart key fob isn't working properly, it may be caused by interference. In this instance, you should not put your key in proximity to any device until the fob's battery has been replaced. Fortunately, most smart keys will notify you well in advance when their batteries are depleted and the procedure for replacing them is fairly simple.