Systems and methods for securing video card output

Details Systems and methods for securing video card output Systems and methods for securing video card output

G - Physics

06

F

G06F 21/00 (2006.01) H04L 9/00 (2006.01) H04N 7/167 (2006.01)

Patent

CA 2427367

The various methods and systems described herein are directed to supplying a secure channel for software executing on a host computer. The methods and systems address and provide solutions for an attack model in which rogue software executing on the host computer attempts to inappropriately obtain or otherwise manipulate data. Some embodiments can provide pixel data that can be kept confidential (in that untrusted software applications cannot read the data off of the display screen). In addition, other embodiments can preserve the integrity of the pixel data by detecting whether the pixel data has been inappropriately manipulated. Various embodiments are based on a decryption engine that is located on a video card very late in the video processing chain such that programmatic access to decrypted pixel data is denied.

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