Car key fobs are an amazing piece of technology in the automotive industry. In newer cars, sometimes all you need is the fob in your pocket to unlock the door or start the engine. Other fobs are programmed to start your car remotely with just a touch of a button.
In our modern society comfort became a standard. This comfort, especially in cars can only be achieved by equipping the car with more electronic devices. Some of the electronic devices must cooperate with each other and thus they require a communication channel, which can be wired or wireless. In these days, it would be hard to sell a new car operating with traditional keys. Almost all modern cars can be locked or unlocked with a Remote Keyless System. A Remote Keyless System consists of a key fob that communicates tirelessly with the car transceiver that is responsible for locking and unlocking the car. However, there are several threats for wireless communication channels. This post describes the possible attacks against a Remote Keyless System and introduces a secure protocol as well as a lightweight Symmetric Encryption Algorithm for a Remote Key-less Entry System applicable in vehicles.
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