Security system using origination message of wireless communication terminal and method thereof

The present invention relates to a security device and a method using the signal (Origination Message) originated to place the call to the wireless communication terminal. Security device according to the present invention is a receiver, and a wireless communication in advance stores the unique information and the encrypted text of the terminal and store that portion, and the radio communication terminal received by the receiving unit for receiving a signal emitted to place the call to the wireless communication terminal directly the unique information and the security setting unit, and a radio communication terminal in the storage unit to the ciphertext set the security states based on the determination result of the control, and a control unit for determining whether matching the unique information and the encrypted text stored in the storage unit-specific information and the encrypted text stored or to be provided with a set of keys for setting the operation of the control unit receives a signal originated to place the call to the wireless communication terminal directly to operate in accordance with the user's request only to the specific information and the encrypted text matches. Thus, the present invention is the wireless communication to perform a security authentication by comparing the unique information and the number wireless communication terminal receives the information stored in advance unique information and the encrypted text of the radio communication terminal included in the signal emitted to place the call to the wireless communication device yet easy-to-use with the device has the advantage that you can maintain a complete security status of the duplex.