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. 03, 2009
Filed:
Jan. 15, 2002
Applicant:
Christophe Nicolas, Preverenges, CH;
Inventor:
Christophe Nicolas, Preverenges, CH;
Assignee:
Nagracard S.A., Cheseaux-Sur-Lausanne, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 11/30 (2006.01); G06F 7/04 (2006.01); H04L 9/00 (2006.01); H04L 9/28 (2006.01); H04N 7/16 (2006.01); H04N 7/173 (2006.01); H04H 60/32 (2008.01);
U.S. Cl.
CPC ...
Abstract
The objective of the present invention is to propose a method to prevent that the decryption of a keys file of a group of data stored in a storing unit (DB) of a decoder (STB), the latter comprising a security module (SM), allows many bad intentioned users to benefit illegally from this product. This method consists in extracting from an encrypted data flux the data to send towards the storing unit (DB) and to re-encrypt the data before transferring them to the storing unit (DB) by at least one specific key (K, K).