Input apparatus and the controlling method thereof

The two inputs input device is disclosed. If input is available input device, the first user terminal and second user terminal device and the content on the screen of the first user terminal device via the communication section and the input to perform communication is selected predetermined first event occurs, the 1 receives the information from the user terminal device to the identification information and encryption key of the first user terminal device, and group the identifier information and information about the encryption key of the first user terminal device received when the second event occurs, set 2 and a processor that transmits to the user terminal device. Accordingly, it is to be added security, and it is possible to transfer a separate data conveniently without using an external storage device to an external device, increasing the user's convenience.