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:
May. 01, 2007
Filed:
Feb. 25, 2002
Applicant:
Eric Chaubert, Gland, CH;
Inventor:
Eric Chaubert, Gland, CH;
Assignee:
Nagravision S.A., Cheseaux-Sur-Lausanne, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04K 1/04 (2006.01); H04K 1/06 (2006.01); H04N 7/167 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for encrypting a compressed video stream comprising independent data blocks and differential data blocks includes the steps of encrypting the independent data blocks with a different level of encryption than that used for the differential data blocks. In one embodiment, the differential data blocks are unencrypted. The method allows the reception of a compressed data stream using powerful algorithms on terminals having small cryptographic capacities.