The present invention is a remote unlock function between Bluetooth (Bluetooth) communication is a mobile communication terminal with lock relates to a smart key (Smart Key) system and a method of operation that can be performed, according to the present invention, the unlock request, and performs encryption-related commands in the smart key system to the public key based on the transmitted and stored in the internal lock can reduce the security risk of the operation of the smart key system to perform an unlock operation and remote start operation by decoding the received command by using a private key (secret key), which. In addition, without possession of the various physical unlocking tool (key) by the required number, conveniently control automatic unlock feature or the keyless entry (Keyless Entry) functions of the various locks, using one of the mobile communication terminal through the Bluetooth communication and will allow you to do.
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