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:
Mar. 08, 2011
Filed:
Sep. 25, 2007
Graeme John Proudler, Bristol, GB;
Boris Balacheff, Bristol, GB;
Liqun Chen, Bristol, GB;
David Chan, Monte Soreno, CA (US);
Graeme John Proudler, Bristol, GB;
Boris Balacheff, Bristol, GB;
Liqun Chen, Bristol, GB;
David Chan, Monte Soreno, CA (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
The preferred embodiment of the invention comprises a computer system which employs a trusted display processor (), which has a trusted processor () and trusted memory () physically and functionally distinct from the processor and memory of the computer system. The trusted display processor () is immune to unauthorised modification or inspection of internal data. It is physical to prevent forgery, tamper-resistant to prevent counterfeiting, and has crypto functions () to securely communicate at a distance. The trusted display processor () interacts with a user's smartcard () in order to extract and display a trusted image, or seal (), generate a digital signature of the bitmap of a document image and control the video memory () so that other processes of the computer system cannot subvert the image during the signing process. The user interacts with the trusted display processor via a trusted switch ().