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Controlling display brightness, contrast, and/or viewing angle at user authentication screen

IP.com Disclosure Number: IPCOM000033184D
Original Publication Date: 2004-Dec-01
Included in the Prior Art Database: 2004-Dec-01

Publishing Venue

IBM

Abstract

Disclosed is a system and means to prevent the password string from being stolen at the user authentication program running on personal computer (PC). There is a security risk that user may not type the password string into the password prompt but may type it into different window (or program) of the screen so that the typed password will be echoed back to the display without being masked and the password string may be seen and stolen by people around the PC. In addition, it's preferred that even the user ID string can not be seen by other people for better security. This invention explains the means to avoid the security risk by controlling the display of the PC while such user authentication program is running.