Methods and systems to directly render an image and correlate corresponding user input in a secure memory domain

摘要

Methods and systems to assign an application and a video frame buffer to a protected memory domain to render an image of a keyboard from the protected memory domain to a random position of the video frame buffer and correlate user input from a pointing device to the rendered keyboard image. The keyboard image may be randomly repositioned following a user input. The keyboard image may be rendered over a secure user image. An acknowledgment image may be rendered from the protected memory domain to a random position of the video frame buffer, and may be randomly repositioned in response to a user input that does not correlate to the acknowledgment image. User inputs that do not correlate to a randomly positioned image may be counted, and one or more processes may be aborted when the number of non-correlated user inputs exceeds a threshold.