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. 03, 2009
Filed:
May. 14, 2004
Applicants:
Serge Vaudenay, Crissier, CH;
Pascal Junod, Lausanne, CH;
Inventors:
Serge Vaudenay, Crissier, CH;
Pascal Junod, Lausanne, CH;
Assignee:
Nagravision SA, Cheseaux-Sur-Lausanne, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 9/28 (2006.01);
U.S. Cl.
CPC ...
Abstract
The purpose of this invention is to propose a new encryption method which offers a high level of security combined with a high execution speed. This aim is achieved by a method to encrypt or decrypt blocks of data X to Y, based on a main key R, this method using several serially connected modules, each module using a sub-key RA derived from the main key R.