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Smart Keys For Cars Smart keys are wireless remotes that can open doors and open the trunk without the requirement for a mechanical blade. It also allows you to start your car without needing to turn a key. The majority of smart keys come with battery indicators that warn you in advance of a low charge. It's simple to replace the battery without any special tools. Convenience Smart keys are designed to unlock trunks and doors and turn on the car engine and turn on the ignition without the driver having to use a traditional metal key. They also come with features that are designed to help deter break-ins and vehicle theft, like a panic button that makes noise to scare away potential thieves or suspicious people in areas with no security like underground parking garages. These key fobs do all this by sending an electronic signal between the car and the key fob, using the low-power wireless technology. This is an excellent feature, particularly for drivers who are on the move and do not have much time. Smart keys generally look more like plastic cards than actual keys. They can be used to open the trunk or doors when you press a button on the fob. Some even have an integrated touchscreen that allows users to control certain settings on their vehicle, including the climate and the audio. The RFID signal sent between a car key fob is unique, encoded and connected to the car's onboard computer. This makes it nearly impossible for tech-savvy criminals to wire a stolen vehicle equipped with a key fob. These key fobs can be programmed to send an updated frequency signal each time they're used, meaning the computer onboard won't recognize an old signal as the “true” signal. Security Many people are hesitant to adopt digital keys as they are concerned 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 think. Digital keys are encrypted and the signal they transmit to a car can be verified by an onboard computer. The vehicle won't start if the smart key fob is compromised. Unlike traditional key fobs smart keys operate by utilizing built-in antennas in your vehicle and a radio pulse generator in the key fob. This allows it to communicate with your vehicle, and perform standard functions such as unlocking and the start of it. This system allows you to access your vehicle without needing to insert keys that are physically placed in the ignition or lock which can be an issue. Most systems offer an alternative method to start and open your car in the event that you lose your smartkey, or if the battery dies. For instance emergency starting can be accomplished by putting the key in a slot or putting it in a particular spot on the car's cockpit, in which an inductive coil can transfer energy is hidden. Most smart keys also have a low-battery indicator that warns you when the key is dead. You can easily replace the battery yourself when you need to. Auto-adjusting settings Instead of physical keys it uses radio waves to unlock and lock the vehicle. They're also able to remotely start your engine and track the location of the vehicle in case you forget where it's parked. Some smart keys can be programmed to automatically adjust the interior and exterior of the vehicle based on the key detected. For example it can be detected the type of key you're using and automatically adjust the seating position, mirror settings and the temperature control. This is helpful if you have multiple drivers or need to restrict certain features when lending your car to a new driver. Another benefit of smart keys is that they use encryption to prevent theft, which isn't feasible with traditional keys. This makes it difficult for thieves with the latest technology to gain access to a vehicle by imitating a valid signal as reported by How Stuff Works Electronics. Smart keys send a distinct encrypted signal each time the vehicle is unlocked or remotely opened. Like any other battery-powered device the battery in a smart key will eventually run out of juice. The majority of systems are built with a backup system to unlock and start the car in the event that the battery fails. The emergency method differs and usually involves keeping the key within the range of the car's lock sensor or pressing the button on the key which activates the emergency starter. Battery Backup Modern smart keys, which are also known as keyless entry systems or passive entry, use a transmitter and receiver to unlock your car. The transmitter is located in the key fob you carry around, and the receivers can be found in and around your vehicle. The receivers detect the radio frequency signal that is sent by your smart key when you enter your vehicle and open the ignition and doors. Although this system has a number of advantages, including the ability to not have to fumble in the dark to find keys, it may be vulnerable to certain kinds of attacks. For example, if the key's battery fails or it is lost, someone else could detect the low-frequency transmission signals from your key and open your car, reports How Stuff Works Electronics. The majority of smart keys come with encrypted signals, making hacking more difficult. However, new smart car key could also be interfered with by electromagnetic fields generated by cell phones, computers and other devices, so if you find that your smart key fob isn't functioning properly, it could be due to interference issues. In this instance you should avoid placing your key near any such device until the battery on the key has been replaced. Most smart keys will inform you when their batteries are empty and the replacement procedure is quite simple.