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Smart Keys For Cars Smart keys are wireless remotes which allow you to open doors and pop the trunk without the necessity of a traditional mechanical blade. It can also be used to start the car without turning the key. The majority of smart keys come with battery indicators and will notify you in advance of a low charge. Replacing the battery is a quick and simple process that doesn't require any special tools. Convenience Smart keys can open doors or trunks, and also turn on the engine of the car without the need to use a key made of metal. They also have features that can deter burglaries and thefts, such as the panic key that makes sounds to frighten away criminals in remote areas like underground garages. Key fobs accomplish all of these functions by sending an audio signal between the car and the key fob, using a low-power wireless technology. replacement smart key is an excellent option for those on the move who do not have much time. A smart key is usually designed to look more like an plastic card than a key, and can be used to open the trunk or car's doors when a button on the fob is pushed. Some smart keys have touchscreens that allow users to control their car's settings, including climate and audio. The RFID signal transmitted between the key fob and the vehicle is unique, encrypted and linked to the onboard computer making it nearly impossible for tech-savvy thieves to wire a stolen vehicle equipped with one. They can also be programmed to transmit a different frequency every time they're used, so that the onboard computer doesn't recognize the old one as the genuine signal. Security Many people are hesitant to make the switch to digital car keys because they worry about security. While having a physical key fob in your pocket may feel safer, digital keys are actually more secure than people think. Digital keys are encrypted and the signal they transmit to a car is analyzed by an onboard computer. The vehicle won't be able to start if the smart key fob is compromised. Contrary to traditional key fobs smart keys use built-in antennas inside your vehicle and the radio pulse generator inside the key fob. This allows it to communicate with your vehicle and perform functions like unlocking and opening it. This feature lets you access your vehicle without needing to insert an actual key into the ignition or lock which can be difficult. Most systems offer an alternative method of opening and starting your vehicle in the event of losing your smartkey or the battery dies. Emergency starting is achieved by putting the key in the slot, or by holding it in a certain part of the cockpit where an inductive coil is able to transfer energy. The majority of smart keys also have a low battery indicator, which warns you before the device is completely dead. If necessary, you are able to easily replace the batteries yourself. 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 can remotely start the engine and track your vehicle's location in case you forget where you parked it. Certain smart keys come with settings which automatically adjust the vehicle's interior and exterior according to the type of key it detects. For example the car will recognize the type of key you're using and automatically adjust the seat position, mirror settings, and the temperature control. 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 they employ encryption to prevent theft, which isn't a possibility with traditional keys. This technology makes it difficult for tech-savvy thieves to steal a vehicle by replicating an acceptable frequency signal reports How Stuff Works Electronics. Smart keys transmit a distinct, encrypted message every time the vehicle's remote or unlocked. Like any other battery-powered device the battery in a smart key will eventually be depleted of power. Most systems come with an emergency system that allows you to open the car and start it in the event that the battery fails. The emergency method can vary however, it is usually keeping the key within the range of the lock sensor on the car or pressing a button that activates the emergency starter. Battery backup Modern smart keys, also known as keyless entry systems or passive entry, utilize a transmitter and a receiver to unlock your vehicle. The transmitter is integrated into the key fob you carry around with you, and the receivers can be found within your car and around the outside of it. The receivers can detect the radio frequency signal transmitted by your smart key when you get close to your vehicle and open the doors and ignition. This system has many advantages, like not having to search in the dark to find keys, however it is also vulnerable to certain types attacks. How Stuff Works Electronics reports that if a key's battery fails or is stolen, someone could pick up the low frequency transmission signal and then open your vehicle. This is why most smart keys come with encrypted signals that make hacking a challenge. However, these systems can be affected through electromagnetic fields created 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 due to an interference problem. In this instance, you should not put your key near any such device until the fob's battery has been replaced. The majority of smart keys will notify you when their batteries are depleted and the process of replacing them is quite simple.