Preventing viewing by bystanders of information on a display screen

摘要

A method of and system for preventing viewing by bystanders of information displayed on a display screen displays simultaneously an active image and a second image. The display screen has a first viewing angle and a second viewing angle. The first image is visible from the first viewing angle and invisible from said second viewing angle. The obfuscating image is invisible from the first viewing and visible from the second viewing angle. The system simultaneously manipulates the first and obfuscating images in response to input by a user.