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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 phones have indicators for battery levels that alert you to the low battery well ahead of time. Replacing the battery is an easy and simple procedure that doesn't require any special tools. Convenience Smart keys are designed to unlock doors and trunks and turn on the car engine and activate the ignition without the driver having to use a traditional key made of metal. They also come with features that are designed to prevent vehicle burglaries and thefts, such as the panic key that makes noises to frighten potential thieves in isolated areas like garages underground. Key fobs accomplish all of these functions by sending radio transmissions between the car key fob and your car using low-power wireless technology. This is a wonderful option for drivers who are often traveling and don't have much time to spare. A smart key is typically shaped more like a plastic card rather than a key, and it can be used to open the trunk or car's doors when the fob's button is pushed. Some smart keys have a touchscreen that lets users to control their vehicle's settings, like audio and climate. The RFID signal that is sent between the key fob and the car is unique, encoded and connected to the car's onboard computer. This makes it impossible for criminals who are tech-savvy to hotwire a stolen car equipped with the key fob. These fobs are also programmable to send a different frequency signal every time they're used, to ensure that the computer doesn't recognize the old one as the genuine signal. Security Many people are reluctant to adopt digital keys as they are worried about security. While having a physical key fob on hand may feel safer the digital keys are more secure than the majority of people think. Digital keys are secure and the signal they send to a car is analyzed by an onboard computer. This means that even if the smart key fob is compromised, the car will never start. Smart keys, unlike traditional key fobs, work by using the built-in antennas in your car to communicate with it and perform basic functions like unlocking and starting your vehicle. This system lets you gain access to your vehicle without a physical key inserted into the ignition or lock. Most systems provide an alternative method of opening and starting your car if you lose your smartkey or if the battery dies. Emergency starting can be accomplished by inserting the key into the slot, or by holding it in a certain area of the cockpit where an inductive coil can transfer energy. Furthermore, many smart keys have a low battery indicator that will alert you before it completely dies. You can replace the battery on your own should you need to. Auto-adjusting settings Instead of using 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 your 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. For example, the car can recognize the key you're using and automatically adjust the seat position, mirror settings and the climate control. This is useful if you have multiple drivers or need to limit certain features when lending your car to a new driver. Another benefit of smart keys is that they employ encryption to prevent theft, something that isn't possible with traditional keys. This makes it difficult for cybercriminals to gain access to a vehicle by using a valid frequency according to How Stuff Works Electronics. Smart keys transmit a unique, encrypted message every time the vehicle's remote is unlocked. Just like any other battery-powered device the battery of a smart key will eventually be depleted of power. Most systems are designed with a backup strategy to open the car and start it in the event of a battery failure. The emergency method differs, but usually involves either keeping the key within the range of the lock sensor or pressing an appropriate button on the key that triggers the emergency start. Battery Backup Modern smart key s are also identified by the terms keyless entry systems or passive entry. They use an electronic transmitter to unlock your vehicle. The transmitter is situated in the key fob you carry around and the receivers are located inside and outside your vehicle. The receivers can detect the radio frequency signal sent by your smart key when you approach the vehicle and then activate the doors and ignition. The system has numerous advantages, like not having to hunt in the dark for keys, but it is also vulnerable to attacks of certain types. How Stuff Works Electronics reports that if the battery of your key goes out or is damaged an attacker could detect the low frequency transmission signal and gain access to your vehicle. This is why a majority of smart keys come with encrypted signals that make hacking more difficult. If you notice that the smart key fob you purchased does not function properly, it could be caused by a problem with interference. In that case you should not place your key in proximity to any device until the battery of the fob has been replaced. Fortunately, many smart keys will inform you in advance when their batteries are running low and the process for replacing them is fairly simple.