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:
Jun. 07, 2005
Filed:
Jul. 14, 1999
Christian Benardeau, Bussy Saint Georges, FR;
Jean-luc Dauvois, Paris, FR;
Christian Benardeau, Bussy Saint Georges, FR;
Jean-Luc Dauvois, Paris, FR;
Canal+ Technologies, Paris, FR;
Abstract
The present invention relates to a method of providing secure communication of information between at least a first and second digital audiovisual device () and characterized in that the first device () communicates to the second device () a certificate Ct(KpubT) comprising a transport public key KpubT encrypted by a management private key KpriMan, the second device () decrypting the certificate using an equivalent management public key KpubMan and thereafter using the transport public key KpubT to encrypt information sent to the first device, the first device using an equivalent private key KpriT to decrypt the information. The present invention is particularly applicable to a method of providing secure communication between a first and second decoder.