SYSTEMS AND METHODS FOR SECURING VIDEO CARD OUTPUT

摘要

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 whi ch rogue software executing on the host computer attempts to inappropriately obtain or otherwise manipulate data. Some embodiments can provide pixel data that c an be kept confidential (in that untrusted software applications cannot read th e 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 cha in such that programmatic access to decrypted pixel data is denied.