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. 27, 2011
Filed:
Jun. 13, 2007
Philippe Carles, Meudon, FR;
Anthony Chevallier, Saint Cyr l'Ecole, FR;
Gilles Dubroeucq, Saint Piat, FR;
Stéphane Lanfranchi, Paris, FR;
Philippe Carles, Meudon, FR;
Anthony Chevallier, Saint Cyr l'Ecole, FR;
Gilles Dubroeucq, Saint Piat, FR;
Stéphane Lanfranchi, Paris, FR;
VIACCESS, Paris la Defense Cedex, FR;
Abstract
A method of broadcasting a scrambled multimedia program, by way of a broadcast network, in which before transmitting a license key; a network head carries out a step of authenticating a terminal, and if the terminal has successfully authenticated, the network heads sends the terminal a license transmission message containing the license key or cryptogram of the license key, by way of a point-to-point link, and if the terminal is not successfully authenticated, the network head acts (at) in such a way as to prevent the complete descrambling by this terminal of the scrambled multimedia program broadcast.