Patents by Inventor Frédéric Grosshans

Frédéric Grosshans 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).

  • High-rate quantum key distribution scheme relying on continuously phase and amplitude-modulated coherent light pulses
    Patent number: 7403623
    Abstract: One aspect of the present invention is related to a quantum cryptographic scheme comprising at least one sending unit including a physical means of encoding and distributing a raw key in the quadrature components of quantum coherent states that are continuously modulated in phase and amplitude, at least one receiving unit containing a physical means of performing homodyne detection of the quantum coherent states in order to measure the quadrature components of the states, a quantum channel for connecting the sending unit to the receiving unit, a two-way authenticated public channel for transmitting non-secret messages between the sending unit and the receiving unit, a quantum key distribution protocol ensuring that the information tapped by a potential eavesdropper can be estimated from the quantum channel parameters, and a direct or reverse reconciliation protocol that converts the raw continuous data into a common binary key.
    Type: Grant
    Filed: July 7, 2003
    Date of Patent: July 22, 2008
    Assignees: Universite Libre de Bruxelles, Centre National de la Recherche Scientifique
    Inventors: Nicolas Cerf, Rosa Brouri-Tualle, Philippe Grangier, Frédéric Grosshans, Gilles Van Assche, Jérôme Wenger
  • High-rate quantum key distribution scheme relying on continuously phase and amplitude-modulated coherent light pulses
    Publication number: 20040109564
    Abstract: One aspect of the present invention is related to a quantum cryptographic scheme comprising at least one sending unit including a physical means of encoding and distributing a raw key in the quadrature components of quantum coherent states that are continuously modulated in phase and amplitude, at least one receiving unit containing a physical means of performing homodyne detection of the quantum coherent states in order to measure the quadrature components of the states, a quantum channel for connecting the sending unit to the receiving unit, a two-way authenticated public channel for transmitting non-secret messages between the sending unit and the receiving unit, a quantum key distribution protocol ensuring that the information tapped by a potential eavesdropper can be estimated from the quantum channel parameters, and a direct or reverse reconciliation protocol that converts the raw continuous data into a common binary key.
    Type: Application
    Filed: July 7, 2003
    Publication date: June 10, 2004
    Inventors: Nicolas Cerf, Rosa Brouri-Tualle, Phillippe Grangier, Frederic Grosshans, Gilles Van Assche, Jerome Wenger