Patents by Inventor Francois Daude

Francois Daude 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).

  • Method and device for watermarking a sequence of images, method and device for authenticating a sequence of watermarked images and corresponding computer program
    Patent number: 9239966
    Abstract: A method for watermarking a sequence of images is provided. The method implements the following steps, for at least one current image: comparing the current image with a preceding image of the sequence, delivering a difference image representing a motion between the preceding image and the current image; if the difference between the current image and the preceding image is above a predetermined threshold, watermarking the current image by inserting a message comprising a field carrying an identifier of the current image and a field carrying a soft hash obtained from at least one portion of the difference image; and if not, watermarking the current image by inserting a message comprising a field carrying an identifier of the current image.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: January 19, 2016
    Assignee: Orange
    Inventors: Gaetan Le Guelvouit, Francois Daude
  • Method and Device for Watermarking a Sequence of Images, Method and Device for Authenticating a Sequence of Watermarked Images and Corresponding Computer Program
    Publication number: 20140294229
    Abstract: A method for watermarking a sequence of images is provided. The method implements the following steps, for at least one current image: comparing the current image with a preceding image of the sequence, delivering a difference image representing a motion between the preceding image and the current image; if the difference between the current image and the preceding image is above a predetermined threshold, watermarking the current image by inserting a message comprising a field carrying an identifier of the current image and a field carrying a soft hash obtained from at least one portion of the difference image; and if not, watermarking the current image by inserting a message comprising a field carrying an identifier of the current image.
    Type: Application
    Filed: March 28, 2014
    Publication date: October 2, 2014
    Inventors: Gaetan Le Guelvouit, Francois Daude
  • Method and device for the encryption and decryption of data
    Patent number: 8548164
    Abstract: Digital data blocks are encrypted, each data block that is to be encrypted being associated with a time reference. A value of an initialization vector Vi and an encryption key K are defined. Then, a counter C is obtained for each data block to be encoded, by combining the time reference and the value of the initialization vector. A series of binary encryption elements is obtained via an encryption function taking the encryption key K and counter C as input parameters. The data block is then encrypted by combining it with the series of binary encryption elements.
    Type: Grant
    Filed: June 14, 2005
    Date of Patent: October 1, 2013
    Assignee: France Telecom
    Inventors: Pascal Nourry, Stéphanie Relier, François Daude
  • Method and Device For the Encryption and Decryption of Data
    Publication number: 20080187134
    Abstract: Digital data blocks are encrypted, each data block that is to be encrypted being associated with a time reference. A value of an initialization vector VI and an encryption key K are defined. Then, a counter C is obtained for each data block to be encoded, by combining the time reference and the value of the initialization vector. A series of binary encryption elements is obtained via an encryption function taking the encryption key K and counter C as input parameters. The data block is then encrypted by combining it with the series of binary encryption elements.
    Type: Application
    Filed: June 14, 2005
    Publication date: August 7, 2008
    Applicant: France Telecom
    Inventors: Pascal Nourry, Stephanie Relier, Francois Daude