Differential-quadrature-phase-shift (DQPS) quantum key distribution

Author

Inoue, Kyo ; Kukita, Tatsuya ; Iwai, Yuuki ; Honjo, Toshimori

Author_Institution

Osaka Univ., Suita, Japan

fYear

2009

fDate

2-4 June 2009

Firstpage

1

Lastpage

2

Abstract

A quantum key distribution (QKD) scheme named differential-quadrature-phase-shift (DQPS) QKD is presented. A transmitter sends a weak coherent pulse train with a phase of {0, pi} {pi/2. 3pi/2} for each pulse, and a receiver measures it with either one of two delay interferometers respectively having bias phases of 0 and pi/2. The scheme introduces the idea of the BB84 protocol into differential-phase-shift (DPS) QKD, making the system robust against a sequential attack, and may guarantee the unconditional security as in BB84.

Keywords

cryptographic protocols; differential phase shift keying; quadrature phase shift keying; quantum cryptography; quantum optics; telecommunication security; BB84 protocol; DQPS QKD; coherent pulse train; differential-quadrature-phase-shift keying; quantum key distribution; two-delay interferometer; unconditional security; Delay; Detectors; Interferometers; Optical receivers; Optical transmitters; Phase detection; Protocols; Pulse measurements; Robustness; Security; (270.5565) Quantum Communications; (270.5568) Optical Cryptography;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics, 2009 and 2009 Conference on Quantum electronics and Laser Science Conference. CLEO/QELS 2009. Conference on

Conference_Location

Baltimore, MD

Print_ISBN

978-1-55752-869-8

Electronic_ISBN

978-1-55752-869-8

Type

conf

Filename

5224526