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:
Feb. 24, 2015
Filed:
Sep. 13, 2012
Applicants:
Joan Daemen, Overpelt, BE;
Jean-louis Modave, Ottignies, BE;
Michel Dawirs, Wezembeek-Oppem, BE;
Inventors:
Assignee:
Proton World International N.V., Zaventem, BE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/00 (2006.01); H04L 9/08 (2006.01);
U.S. Cl.
CPC ...
H04L 9/003 (2013.01); H04L 9/0861 (2013.01); H04L 9/0891 (2013.01); H04L 2209/12 (2013.01);
Abstract
A method of derivation, by an electronic circuit, of a first key from a second key, wherein: at least one third key is derived from the second key and is used to derive the first key; and a value of a counter, representative of the number of first keys, conditions the derivation of a new value of the third key.