Browse Prior Art Database

Hardware Monitor Security Feature

IP.com Disclosure Number: IPCOM000035792D
Original Publication Date: 1989-Aug-01
Included in the Prior Art Database: 2005-Jan-28
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Leise, LE: AUTHOR

Abstract

Disclosed is a feature that can be incorporated into monitor and display designs for enhanced security when attached to large host systems.

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Hardware Monitor Security Feature

Disclosed is a feature that can be incorporated into monitor and display designs for enhanced security when attached to large host systems.

This disclosure is an extension of a screen saver function that provides increased security when user inactivity is detected. The fact that no user participation is required for the security feature to be activated is its primary advantage.

The screen saver and security features are initiated by a period of user inactivity (no keyboard entry) that is tracked by a timeout counter. The screen saver timeout occurs at time T1 and the screen is blanked. At this point, the user can retrieve the video information displayed on the CRT screen by hitting any key and the session will continue uninterrupted. If the user does not hit any key, then the security timeout occurs at time T2. Now, to resume the session, the user must enter a security code that was saved into the feature option card/board installed in the logic section.

The security code would be saved in an EPROM on the board and would be known only to the user that programmed the EPROM. This security code could consist of a single keystroke stored in the EPROM by a unique keystroke combination. Two actions can take place upon entry of the security code: the security code is correct and the previous video information reappears, or the security code is incorrect (a possible unauthorized usage) causing the logic to automatically disconnect the ho...