Private information can be displayed using alternate frame sequencing to prevent unauthorized viewing. The private information can be ascertained by an authorized user using an active shutter viewing device synchronized to the alternate frame sequencing display. Private information can be displayed on a portion of the display, while public information, including a basic user interface, can be displayed on a second portion visible to authorized and unauthorized users. For enhanced security, alternate frame sequencing synchronization parameters can be encrypted and exchanged between a display device and the viewing device. When and where to display private information using alternate frame sequencing can be determined using environmental sensors. A single display screen can be configured to simultaneously present private information to multiple users, each user permitted to view a portion of the private information according to the unique synchronization parameters employed by a user's viewing device.