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:
Jun. 16, 2015
Filed:
May. 06, 2011
Applicant:
Sven Bauer, Vaterstetten, DE;
Inventor:
Sven Bauer, Vaterstetten, DE;
Assignee:
GIESECKE & DEVRIENT GMBH, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 9/445 (2006.01); G06F 9/44 (2006.01); G06F 21/54 (2013.01);
U.S. Cl.
CPC ...
G06F 21/54 (2013.01); G06F 2221/2101 (2013.01); G06F 2221/2123 (2013.01);
Abstract
A method and a system for checking whether program instructions have been executed by an end device, wherein, the end device calls for program instructions and the program instructions are stored in executable form in a trustworthy entity, in particular a chip card. Subsequently, the program instructions are variably modified in the trustworthy entity such that the modified program instructions vary upon each execution of the method. Through execution of the instructions in the end device there is obtained a check value which is in turn transferred to the trustworthy entity and verified in the trustworthy entity.