TWO NON-ORTHOGONAL STATES QUANTUM CRYPTOGRAPHY METHOD AND APPARATUS WITH INTRA-AND INTER-QUBIT INTERFERENCE FOR EAVESDROPPER DETECTION

Title:

TWO NON-ORTHOGONAL STATES QUANTUM CRYPTOGRAPHY METHOD AND APPARATUS WITH INTRA-AND INTER-QUBIT INTERFERENCE FOR EAVESDROPPER DETECTION

Document Type and Number:

WIPO Patent Application WO2006024939

Kind Code:

B1

Abstract:

An apparatus and method for implementing a secure quantum cryptography system using two non-orthogonal states. For each qubit, the to emitter station prepares a quantum system in one of two non-orthogonal quantum states in the time-basis to code bit values. Intra- and inter-qubit interference is then used to reveal eavesdropping attempts. Witness states are used to help reveal attacks performed across the quantum system separation.

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Inventors:

GISIN NICOLAS (CH)
RIBORDY GREGOIRE (CH)
ZBINDEN HUGO (CH)

Application Number:

PCT/IB2005/002622

Publication Date:

August 17, 2006

Filing Date:

September 01, 2005

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Assignee:

ID QUANTIQUE S A (CH)
GISIN NICOLAS (CH)
RIBORDY GREGOIRE (CH)
ZBINDEN HUGO (CH)

International Classes:

H04L9/08

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