The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 22, 2014
Filed:
Sep. 21, 2011
Donald Felton, Ely, GB;
Donald Felton, Ely, GB;
ARM Limited, Cambridge, GB;
Abstract
A data processing device is provided with a processor corethat can operate in either a secure domain or a non-secure domain. Data stored within a secure regionof a memorycan only be accessed when the processor coreis executing in the secure domain. A frame bufferfor storing a display imageto be displayed is stored within a non-secure region of memory which can be accessed by the processor coreirrespective of whether it is in the secure domain or the non-secure domain as well as a display controller. When a subject imageis written to the frame buffer, validation data for the subject imageis stored within the secure region. 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.