Usb security system and security method

USB pod locking device according to the present invention is contained is inserted in the USB port, the release unit and a locking unit to lock the USB port, disconnect the lock unit from the USB port, the locking unit has a unique identification code assigned IC chip is mounted, the unlocking unit is provided with the display unit having a display to confirm the unique identification code of the lock unit with the naked eye, when locking the lock unit to the USB port informs whether the lock and open, unique identification code of the terminal and by making it possible to lock the IC chipman the terminal is consistent, it is possible to improve the security.