Patent ID: 8102239

Claim:
A smart key for vehicles, comprising: a Radio Frequency (RF) Interface (I/F) unit for transmitting a radio signal to a smart key Electronic Control Unit (ECU), which is provided in a vehicle; a smart key unit for transmitting door lock/unlock signals to the RF I/F unit so that the RF I/F unit transmits the door lock/unlock signals to the smart key ECU; a Universal Subscriber Identity Module (USIM) inserted into a USIM interface unit provided in the smart key, configured to be able to be coupled to a mobile communication terminal, and configured to store USIM information therein; a USIM I/F unit for extracting the USIM information from the USIM; and a microcontroller for performing control so that the radio signal, which corresponds to the USIM information received from the USIM I/F unit, is transmitted to the smart key ECU via the RF I/F unit.