Patents by Inventor Philippe Roudot

Philippe Roudot 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).

  • Methods and devices for selective format-preserving data encryption
    Patent number: 9473829
    Abstract: Selective data encryption of a file, in particular an H.264/MPEG-4 AVC data stream. If a first unit in the data stream is to be encrypted, it is encrypted and the encryption is put into a further unit, preferably in the data stream. A substitution unit is generated and put in the place of the first unit; if necessary, at least one header value is taken from the first unit for use in the substitution unit. A decryptor receives the encrypted data stream, extracts and decrypts the further unit and replaces the substitution unit with a regenerated first unit.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: October 18, 2016
    Assignee: Thomson Licensing
    Inventors: Frédéric Lefebvre, Séverine Baudry, Antoine Robert, Philippe Roudot
  • METHODS AND DEVICES FOR SELECTIVE FORMAT-PRESERVING DATA ENCRYPTION
    Publication number: 20130064368
    Abstract: Selective data encryption of a file, in particular an H.264/MPEG-4 AVC data stream. If a first unit in the data stream is to be encrypted, it is encrypted and the encryption is put into a further unit, preferably in the data stream. A substitution unit is generated and put in the place of the first unit; if necessary, at least one header value is taken from the first unit for use in the substitution unit. A decryptor receives the encrypted data stream, extracts and decrypts the further unit and replaces the substitution unit with a regenerated first unit.
    Type: Application
    Filed: September 12, 2012
    Publication date: March 14, 2013
    Inventors: Frédéric Lefebvre, Séverine Baudry, Antoine Robert, Philippe Roudot