US 2010/0169666 A1 · METHODS AND SYSTEMS TO DIRECLTY RENDER AN IMAGE AND CORRELATE CORRESPONDING USER INPUT IN A SECUIRE MEMORY DOMAIN

Abstract

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.

Claims23

Dependent claims

A method, comprising:

initiating at least a portion of an application program in an access-protected memory domain;
assigning a video frame buffer to the access-protected memory domain;
rendering a keyboard image to a random position in the video frame buffer;
correlating coordinates of a user input with a key of the rendered keyboard image;
storing an indication of the key in the access-protected memory domain;
re-rendering the keyboard image to another random position in the video frame buffer in response to the user input;
repeating the correlating and the storing with respect to an another user input;
and
outputting the indications of the keys from the access-protected memory domain;
wherein the assigning, the rendering, the correlating, the storing, the re-rendering, the repeating, and the outputting are performed under control of the at least the portion of the application program in the access-protected memory domain.

7 more elements

A system, comprising:

a processor;
a graphics processor;
memory coupled to the processor, the memory having a video frame buffer defined therein that is accessible to the graphics processor;
and
a computer program product within the memory, including a computer readable medium having computer program logic stored therein to cause a processor to perform functions in response thereto, the computer program product including,
memory protection logic to cause a processor to configure an access-protected memory domain within the memory,
application logic to cause the processor to assign the video frame buffer to the access-protected memory domain, and to cause the processor to render a keyboard image from the access-protected memory domain to a random position in the video frame buffer, re-render the keyboard image from the access-protected memory domain to another random position of the video frame buffer in response to a user input, correlate coordinates of user inputs with keys of the keyboard image, store indications of the corresponding keys in the access-protected memory domain, and output the indications of the keys from the access-protected memory domain;
and
trusted execution logic to cause the processor to load, authenticate, and initiate at least a portion of the user-application logic in the access-protected memory domain.

6 more elements

Dependencies are inferred from the claim text.

Methods and systems to direclty render an image and correlate corresponding user input in a secuire memory domain

Life of this patent

Methods and systems to direclty render an image and correlate corresponding user input in a secuire memory domain

Life of this patent

Abstract

Claims23