Patents by Inventor Corine Le Buhan

Corine Le Buhan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Secured storage method of encrypted data on a personal digital recorder
    Patent number: 8082588
    Abstract: The objective of the present invention is a storage method in a decoder of an event encrypted by control words that guarantees the access to this event at whichever moment, even if certain keys of the system have changed for security reasons. This objective is achieved by a storage method of an event encrypted by control words in a reception and decryption unit connected to a security unit, said control words and the necessary rights being contained in management messages encrypted by system keys, comprising storing the encrypted event as well as the control messages in the storage unit, and storing in the storage unit the system keys encrypted by a predefined local key stored in the security unit.
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: December 20, 2011
    Assignee: Nagravision S.A.
    Inventors: Corine Le Buhan, Marco Sasselli, Patrick Bertholet