A mobile terminal, comprising: a touch screen displaying lock state images and a set of shortcut icons at a bottom area of the touch screen; and a controller configured to: display an image of a first enclosure and an unlock image of a second enclosure bounded by the image of the first enclosure on the touch screen in response to detection of a contact on the lock state images while the mobile terminal is in an lock state, the unlock image of a second enclosure formed to surround an initial position of the contact; enlarge the unlock image of the second enclosure in accordance with movement of the contact away from the initial position of the contact while the contact on the touch screen is maintained throughout the movement; unlock the mobile terminal in response to a release of the contact when the unlock image of the second enclosure is enlarged to reach or exceed a boundary of the image of the first enclosure; execute a shortcut icon if the movement of the contact leads to a selection of the shortcut icon upon the releasing of the contact; and display, on the touch screen, an execution screen of an application associated with the shortcut icon. a touch screen displaying lock state images and a set of shortcut icons at a bottom area of the touch screen; and a controller configured to: display an image of a first enclosure and an unlock image of a second enclosure bounded by the image of the first enclosure on the touch screen in response to detection of a contact on the lock state images while the mobile terminal is in an lock state, the unlock image of a second enclosure formed to surround an initial position of the contact; enlarge the unlock image of the second enclosure in accordance with movement of the contact away from the initial position of the contact while the contact on the touch screen is maintained throughout the movement; unlock the mobile terminal in response to a release of the contact when the unlock image of the second enclosure is enlarged to reach or exceed a boundary of the image of the first enclosure; execute a shortcut icon if the movement of the contact leads to a selection of the shortcut icon upon the releasing of the contact; and display, on the touch screen, an execution screen of an application associated with the shortcut icon. display an image of a first enclosure and an unlock image of a second enclosure bounded by the image of the first enclosure on the touch screen in response to detection of a contact on the lock state images while the mobile terminal is in an lock state, the unlock image of a second enclosure formed to surround an initial position of the contact; enlarge the unlock image of the second enclosure in accordance with movement of the contact away from the initial position of the contact while the contact on the touch screen is maintained throughout the movement; unlock the mobile terminal in response to a release of the contact when the unlock image of the second enclosure is enlarged to reach or exceed a boundary of the image of the first enclosure; execute a shortcut icon if the movement of the contact leads to a selection of the shortcut icon upon the releasing of the contact; and display, on the touch screen, an execution screen of an application associated with the shortcut icon.