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. 03, 2013
Filed:
May. 05, 2009
Applicants:
Wilhelmus P. A. J. Michiels, Eindhoven, NL;
Paulus M. H. M. A. Gorissen, Eindhoven, NL;
Inventors:
Wilhelmus P. A. J. Michiels, Eindhoven, NL;
Paulus M. H. M. A. Gorissen, Eindhoven, NL;
Assignee:
Irdeto Corporate B.V., , NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of obfuscating an exponent is provided. The method comprises identifying a value λ for which it holds that λ>0 and x=1 for a plurality of elements x which are to be used in a cryptographic process. The method further comprises identifying an obfuscated exponent y which is greater than λ and providing information indicative of the obfuscated exponent y. The method comprises establishing a key value a, wherein a<λ, selecting a positive integer b, and computing y=a+bλ.