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:
Nov. 09, 2010
Filed:
Aug. 02, 2007
Applicant:
Pascal M. Junod, Vufflens-la-Ville, CH;
Inventor:
Pascal M. Junod, Vufflens-la-Ville, CH;
Assignee:
Nagravision S.A., Cheseaux-sur-Lausanne, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N 7/167 (2006.01); H04L 9/00 (2006.01); H04L 9/08 (2006.01); H04L 9/32 (2006.01);
U.S. Cl.
CPC ...
Abstract
The aim of the present invention is to propose a method to prevent the abusive use of conditional access data, in particular by means of clones of security modules whose security has been compromised. This aim is reached by a revocation method of security modules intended to receive security messages broadcasted to a plurality of security modules, said security modules comprising at least one personal key, this method comprising the steps, prior to revocation: