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Smart Keys For Cars A smart key is a wireless car remote that operates without the traditional mechanical blade and can unlock the doors or pop the trunk from some distance. It is also able to start the car without turning a key. The majority of smart phones have indicators for the battery that warn you of the low battery well ahead of time. Replacing the battery is a simple and easy process that doesn't require any special tools. Convenience Smart keys are designed to open trunks and doors as well as turn on the vehicle's engine and turn on the ignition without the driver needing to use a traditional key made of metal. They also come with features designed to deter vehicle theft and break-ins, like the panic key which makes noises to frighten criminals in remote areas like garages underground. Key fobs accomplish all of these functions via an audio signal between the car key fob and the car via low-power wireless technology. This is a wonderful feature, especially for drivers on the move and do not have much time. A smart key is usually designed to look more like an plastic card than a real key, and it can be used to open the trunk or car's doors when a button on the fob is pushed. Some even come with an integrated touchscreen that allows drivers to control certain settings of their vehicle, such as audio and climate. The RFID signal sent between the key fob and the vehicle is unique, encrypted and tied to the onboard computer, making it almost impossible for thieves who are tech-savvy to wire a stolen vehicle equipped with one. The fobs can also be programmed to send an updated frequency signal each when they're utilized, so the computer in the car won't be able to recognize an old signal as the “true” signal. Security Many people are reluctant to adopt digital keys as they are worried about security. While having a physical fob in your pocket may 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 can be verified by an onboard computer. This means that even if your key fob is stolen the car won't start. In smart car key fob to traditional key fobs smart keys use built-in antennas in your vehicle and a radio pulse generator in the key fob to connect with your vehicle and perform functions such as unlocking and the start of it. This feature lets you access your vehicle without having to insert keys that are physically placed in the ignition or lock, which is often an inconvenience. If you have lost your smart key or if its battery goes out the majority of systems provide an alternative method to open and start your car. For example the emergency start can be achieved by placing the key in a slot or putting it near a specific area in the cockpit, which is where an inductive device that can transfer energy is hidden. Furthermore, many smart keys have a low-battery indicator that warns you before it completely dies. If needed, you can easily replace the batteries yourself. Auto-adjusting settings Rather than using physical keys rather than a physical key, the smart key uses radio waves to unlock, lock, and activate the vehicle. The smart key also allows you to remotely start the engine and track your vehicle's location in case you forget where you parked it. Some smart keys can be programmed to automatically adjust the interior and exterior of the vehicle based on the key detected. For example, the car can recognize the key you're using, and adjust the seat position, mirror settings, and climate control. This is very useful if have multiple drivers or need to restrict certain features when you loan your car to a new driver. Another benefit of smart keys is the fact that they employ encryption to stop theft, which isn't possible with traditional keys. This technology makes it extremely difficult for tech-savvy criminals to hijack a car by using a valid frequency as reported by How Stuff Works Electronics. Smart keys send a unique encrypted message each time the remote is unlocked. Like any other battery-powered device, a smart key's battery will eventually run out of juice. The majority of systems are equipped with a backup plan to open the car and start it when the battery is not working. The emergency method may differ but usually it involves keeping the key within the proximity to the sensor for the lock on the car or pressing a key button that activates the emergency start. Battery backup Modern smart keys, which are also referred to as keyless access systems or passive entry, use a transmitter and receiver to unlock your vehicle. The transmitter is contained in the key fob you carry around and the receivers can be found in and around your vehicle. When you approach the vehicle, the radio frequency signal from your smart key is detected by the receivers and triggers the doors and ignition. While this system comes with many advantages, such as not having to search in the dark to find the key, it can be vulnerable to certain kinds of attacks. How Stuff Works Electronics reports that if the battery of your key fails or is stolen an attacker could detect its low-frequency transmission signal and then open your vehicle. This is why a majority of smart keys have encrypted signals to ensure that hacking is difficult. However, these systems may also be interfered with due to electromagnetic fields generated by cell phones, computers and other devices. Therefore, if you notice that your smart key fob is not functioning correctly, it could be caused by an interference issue. In that case it is best not to place your key near any device until the battery on the key has been replaced. Most smart keys will alert you when their batteries are depleted and the replacement procedure is relatively simple.