Security provision for a subject image displayed in a non-secure domain
US8707056B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 21, 2011 |
| Grant date | Apr 22, 2014 |
| Priority date | — |
| Expiry date | Jul 30, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06Q40/02
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data processing device is provided with a processor core 8 that can operate in either a secure domain or a non-secure domain. Data stored within a secure region 34 of a memory 10 can only be accessed when the processor core 8 is executing in the secure domain. A frame buffer 36 for storing a display image 20 to be displayed is stored within a non-secure region of memory which can be accessed by the processor core 8 irrespective of whether it is in the secure domain or the non-secure domain as well as a display controller 12. When a subject image 22 is written to the frame buffer 36, validation data for the subject image 22 is stored within the secure region 34. When a user input is received the displayed data stored at a validated display area to which the subject image was written is read back and used to generate check data with is compared with the validation data before the user input is authenticated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.