Methods and systems to directly render an image and correlate corresponding user input in a secure memory domain
US8364601B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 2008 |
| Grant date | Jan 29, 2013 |
| Priority date | — |
| Expiry date | Aug 8, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/36
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.