Quantum cryptography with coherent-state light: demonstration of a secure data encryption scheme operating at 100 kb/s

Author

Barbosa ; Corndorf ; Kumar, Pranaw

Author_Institution

Electr. & Comput. Eng. Dept., Northwestern Univ., Evanston, IL, USA

fYear

2002

fDate

19-24 May 2002

Firstpage

189

Lastpage

190

Abstract

Summary form only given. In this work, we present a free-space implementation of quantum cryptography, in which we use secret keys (a short key K appropriately expanded into K´ by use of another encryption mechanism such as a stream cipher) to set the polarization bases between a transmitter and a receiver. The transmitter uses the secret key to randomly choose a polarization basis from a set of M/2 uniformly spanning a great circle on the Poincare sphere.

Keywords

electro-optical modulation; light coherence; light polarisation; message authentication; optical links; quantum cryptography; 100 kbit/s; Poincare sphere; coherent-state light; electro-optic modulator; encryption mechanism; free-space implementation; great circle; key expansion; message authentication; polarization bases; polarization basis; quantum cryptography; receiver; secret keys; secure data encryption scheme; short key; stream cipher; transmitter; Data security; Electrooptic modulation; Optical polarization;

fLanguage

English

Publisher

ieee

Conference_Titel

Quantum Electronics and Laser Science Conference, 2002. QELS '02. Technical Digest. Summaries of Papers Presented at the

Conference_Location

Long Beach, CA, USA

Print_ISBN

1-55752-708-3

Type

conf

DOI

10.1109/QELS.2002.1031292

Filename

1031292