Patents Assigned to Canal+ Technologies
  • Patent number: 6904522
    Abstract: The present invention relates to a method of providing secure communication of information between at least a first and second digital audiovisual device (30, 52) and characterized in that the first device (30) communicates to the second device (52) a certificate Ct(KpubT) comprising a transport public key KpubT encrypted by a management private key KpriMan, the second device (52) 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.
    Type: Grant
    Filed: July 14, 1999
    Date of Patent: June 7, 2005
    Assignee: Canal+ Technologies
    Inventors: Christian Benardeau, Jean-Luc Dauvois