A computing device can track a gaze direction of a user of the computing device. In some embodiments, gaze tracking can be performed using at least one front-facing camera of the computing device. The computing device can determine a position on a display of the device that corresponds to where the user's gaze is directed. The computing device can display content that is decipherable (i.e., readable, legible, recognizable, understandable, non-scrambled, unobscured, etc.) at the position on the display that corresponds to the user's gaze direction. The computing device can scramble at least some content that is displayed at a position(s) on the display other than the position at which the user's gaze is directed.