Patent · US Active

Two non-orthogonal states quantum cryptography method and apparatus with inter-and inter-qubit interference for eavesdropper detection

US7929690B2 · kind B2 · utility

5Cited by

3References

44Claims

0Family size

Assignee

ID QUANTIQUE SA · CH

Inventors

Nicolas Gisin · Geneva, CH
Grégoire Ribordy · Geneva, CH
Hugo Zbinden · Geneva, CH

Key dates

Filing date	Sep 1, 2005
Grant date	Apr 19, 2011
Priority date	—
Expiry date	Jun 28, 2027

Classification

Technology area (CPC H)Electricity
CPC primaryH04L9/0858
WIPO fieldDigital communication
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.