An information processing device, comprising: an acquisition unit that acquires authentication information and operation information; and a display control unit that controls a display on a basis of the authentication information or the operation information acquired by the acquisition unit, wherein the display control unit causes a lock screen to be displayed in a case in which certain operation information is acquired while an initial screen is being displayed, causes an unlocked return screen to be displayed in a case in which an authentication process based on the authentication information is successful, and controls, on a basis of the operation information, a transition from the lock screen to the return screen conducted in accordance with the authentication process, wherein the display control unit continues to cause a transition screen indicating an ongoing transition from the lock screen to the return screen to be displayed during an execution period of the authentication process and another period continuous with the execution period which continues after the authentication process has completed, and causes the lock screen to be displayed in a case in which certain operation information is obtained while the transition screen is being displayed, the display control unit controls a display period of the transition screen; and the display control unit controls a display period of the transition screen in accordance with an operation history of a user by controlling the another period. an acquisition unit that acquires authentication information and operation information; and a display control unit that controls a display on a basis of the authentication information or the operation information acquired by the acquisition unit, wherein the display control unit causes a lock screen to be displayed in a case in which certain operation information is acquired while an initial screen is being displayed, causes an unlocked return screen to be displayed in a case in which an authentication process based on the authentication information is successful, and controls, on a basis of the operation information, a transition from the lock screen to the return screen conducted in accordance with the authentication process, wherein causes a lock screen to be displayed in a case in which certain operation information is acquired while an initial screen is being displayed, causes an unlocked return screen to be displayed in a case in which an authentication process based on the authentication information is successful, and controls, on a basis of the operation information, a transition from the lock screen to the return screen conducted in accordance with the authentication process, wherein the display control unit continues to cause a transition screen indicating an ongoing transition from the lock screen to the return screen to be displayed during an execution period of the authentication process and another period continuous with the execution period which continues after the authentication process has completed, and causes the lock screen to be displayed in a case in which certain operation information is obtained while the transition screen is being displayed, the display control unit controls a display period of the transition screen; and the display control unit controls a display period of the transition screen in accordance with an operation history of a user by controlling the another period.