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:
Dec. 13, 2016
Filed:
Oct. 25, 2012
Applicant:
Giesecke & Devrient Gmbh, Munich, DE;
Inventor:
Jurgen Pulkus, Munich, DE;
Assignee:
GIESECKE & DEVRIENT GMBH, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04K 1/00 (2006.01); H04L 9/00 (2006.01); H04L 9/14 (2006.01); H04L 9/08 (2006.01); G06F 7/72 (2006.01);
U.S. Cl.
CPC ...
H04L 9/14 (2013.01); G06F 7/72 (2013.01); H04L 9/0869 (2013.01); G06F 7/728 (2013.01); G06F 2207/7204 (2013.01);
Abstract
In a method for checking whether a value represents a prime number, for a cryptographic application, a Fermat test is carried out, which includes a modular exponentiation of a base with an exponent (e) and a module (m). The exponent (e) and the module (m) respectively depend on the value to be checked, and the modular exponentiation is executed employing Montgomery operations. A device and a computer program product have corresponding features. The method can be particularly efficiently implemented on suitable platforms.