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:
Dec. 01, 2009
Filed:
Nov. 08, 2002
Applicants:
Ralf Schaefer, Acigne, FR;
Alain Durand, Rennes, FR;
Laurent Lesenne, Acigne, FR;
Frédéric Pasquier, Laille, FR;
Inventors:
Ralf Schaefer, Acigne, FR;
Alain Durand, Rennes, FR;
Laurent Lesenne, Acigne, FR;
Frédéric Pasquier, Laille, FR;
Assignee:
Thomson Licensing, Boulogne-Billancourt, FR;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/00 (2006.01); G06F 21/24 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention concerns a device and a process for signing digital streams, each of them comprising contents, related to audiovisual information, and a signaling. The device applies encrypting to selectively determined descriptors of the signaling, called authenticated descriptors, to obtain signature. The invention also concerns corresponding authentication device and process. Application to authentication of DVB/MPEG digital streams, notably for MHP.