Cryptography – Key management – Key distribution
Reexamination Certificate
2008-07-22
2008-07-22
Moise, Emmanuel L (Department: 2137)
Cryptography
Key management
Key distribution
C380S256000, C359S238000
Reexamination Certificate
active
07403623
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.
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Brouri-Tualle Rosa
Cerf Nicolas
Grangier Philippe
Grosshans Frédéric
Van Assche Gilles
Centre National de la Recherche Scientifique
Davis Zachary A
Knobbe Martens Olson & Bear LLP
Moise Emmanuel L
Universite Libre De Bruxelles
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