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:
Apr. 01, 2008
Filed:
Dec. 11, 2002
Applicants:
Jean-luc Dauvois, Le Mans, FR;
Jérôme Perrine, Versailles, FR;
Inventors:
Jean-Luc Dauvois, Le Mans, FR;
Jérôme Perrine, Versailles, FR;
Assignee:
Nagra Thomson Licensing, Boulogne-Billancourt, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04K 1/04 (2006.01); H04K 1/06 (2006.01); H04K 1/00 (2006.01); H04L 9/00 (2006.01); H04L 9/32 (2006.01); G06F 11/30 (2006.01); G06F 12/14 (2006.01); G06K 19/06 (2006.01); G06K 5/00 (2006.01); G06F 17/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
This invention relates to a digital electronic component which is protected against electrical- and/or electromagnetic-type analyse). The inventive component comprises: a synchronous element () which is controlled by a clock (H); means () of generating said clock (H), the frequency of which varies randomly between a minimum value and a maximum value for at least a given period of time; and means () of controlling the random nature of the frequency change of said clock (H).