Secure Display Terminal
Original Publication Date: 1984-May-01
Included in the Prior Art Database: 2005-Feb-03
This article describes a method and a typical terminal system to protect classified information from casual or furtive observation on a display terminal. Securing data on a display system with centralized files accessed through terminals requires that the data to be secured must have been tagged or labeled in some way. A method is to use keyword or key-string locks as the first characters in a file or message. When the centralized files of a terminal system are accessed, the data sent from the host computer are firstly received by a character detector. If the received data are recognized as not classified, the terminal will operate in the usual manner, sending the data to the screen buffer and then to the video character generator for the display on the screen of the CRT.