Methods and systems for preventing access to display graphics generated by a trusted virtual machine
US8627456B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2010 |
| Grant date | Jan 7, 2014 |
| Priority date | — |
| Expiry date | Sep 2, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2149
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The methods and systems provide for preventing a non-trusted virtual machine from reading the graphical output of a trusted virtual machine. A graphics manager receives a request from a trusted virtual machine to render graphical data using a graphics processing unit. The graphics manager assigns, to the trusted virtual machine, a secure section of a memory of the graphics processing unit. The graphics manager renders graphics from the trusted virtual machine graphical data to the secure section of the graphics processing unit memory. The graphics manager receives a request from a non-trusted virtual machine to read graphics rendered from the trusted virtual machine graphical data and stored in the secure section of the graphics processing unit memory, and prevents the non-trusted virtual machine from reading the trusted virtual machine rendered graphics stored in the secure section of the graphics processing unit memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.