Abstract: A memory device includes an input unit configured to receive a plain text and output plain blocks and CTS plain block, a multi-core unit including a plurality of encryption/decryption cores configured to encrypt each of the plain blocks provided from the input unit and output cipher blocks in accordance with control of an encryption/decryption core control unit, a CTS core unit including a CTS core configured to encrypt the CTS plain block provided from the input unit into a CTS cipher block, and an output unit configured to receive the cipher blocks and the CTS cipher block and output a cipher text. The CTS plain block is generated through a CTS calculation based on the plain text.

Abstract: Disclosed are a portable terminal having a flexible display, and a screen controlling method thereof. When detecting an entertainment key for a film, a game, a navigation and a DMB, a flexible display disposed inside a body is slid to a vertical direction of a main display to have an extended screen. On the other hand, when detecting an incoming call or dropping of the portable terminal in a state that the flexible display has been extended, the flexible display is restored to an initial state. This may allow a user to more conveniently appreciate various entertainments such as films, games, navigations, and DMB, and may effectively prevent damage of the portable terminal.

Abstract: Disclosed are a portable terminal having a flexible display, and a screen controlling method thereof. When detecting an entertainment key for a film, a game, a navigation and a DMB, a flexible display disposed inside a body is slid to a vertical direction of a main display to have an extended screen. On the other hand, when detecting an incoming call or dropping of the portable terminal in a state that the flexible display has been extended, the flexible display is restored to an initial state. This may allow a user to more conveniently appreciate various entertainments such as films, games, navigations, and DMB, and may effectively prevent damage of the portable terminal.