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Keyless Entry

Keyless entry systems, also known as remote entry systems, are popular on vehicles. Like any communication device, this system depends on a transmitter and a receiver. The receiver is mounted inside the vehicle and the transmitter is on the key or key chain (this device is also known as an electronic key fob). To aid in security, keyless entry systems use a rolling code (also know as code-hopping) that can randomly generate millions of encrypted codes. The transmitter and receiver stay synchronized so they can communicate with one another.