Car keys with chips are commonly used for remote keyless entry (RKE) systems in modern cars. The chip in the key is called a transponder, and it plays a crucial role in providing security and convenience.
Here's how it works:
1. Security: The chip in the car key contains a unique code that is programmed to match the car's immobilizer system. When you insert the key into the ignition or use it to unlock the car door, the transponder sends a signal to the car's computer system.
2. Authentication: The car's computer system then checks the code transmitted by the transponder against the stored codes in its memory. If the code matches, the car allows the ignition to start or unlocks the doors. If the code doesn't match, the car remains immobilized or the doors remain locked.
3. Anti-theft: The use of the transponder chip makes it difficult for thieves to steal the car by hot-wiring it or using duplicate keys. Without the correct code from the transponder, the car's ignition system won't engage, preventing unauthorized access.
4. Convenience: RKE systems also allow you to remotely lock or unlock the car doors by pressing a button on the key fob. This eliminates the need to insert the key into the lock manually and makes it easier to access the car.
To summarize, car keys with chips provide an extra layer of security by using a unique code stored in the transponder chip. The car's computer system verifies this code, allowing the car to start or the doors to unlock. Additionally, the convenience of remote keyless entry makes it easier to access the car without using the physical key.