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. 06, 2018
Filed:
Dec. 16, 2013
Applicant:
Giesecke & Devrient Gmbh, Munich, DE;
Inventor:
Thomas Stocker, Munich, DE;
Assignee:
GEISECKE+DEVRIENT MOBILE SECURITY GMBH, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/00 (2006.01); G06F 21/64 (2013.01); H04L 9/32 (2006.01);
U.S. Cl.
CPC ...
H04L 9/003 (2013.01); G06F 21/64 (2013.01); H04L 9/3239 (2013.01); H04L 9/3242 (2013.01);
Abstract
A method for operating a portable data carrier includes a processing unit for processing commands and a memory unit for storing data, with random wait states being inserted into the processing of the commands for thwarting SPA/DPA attacks. An actual checksum may be computed over the data of a selected region of the memory unit during a random wait state. A portable data carrier is arranged for executing the method.