Free-space quantum cryptography for metropolitan areas

M. Fürst; T. Schmitt-Manderbach; H. Weier; I. Ordavo; H. Weinfurter

doi:10.1117/12.690184

16 October 2006 Free-space quantum cryptography for metropolitan areas

M. Fürst, T. Schmitt-Manderbach, H. Weier, I. Ordavo, H. Weinfurter

Proceedings Volume 6399, Advanced Free-Space Optical Communication Techniques/Applications II and Photonic Components/Architectures for Microwave Systems and Displays; 63990I (2006) https://doi.org/10.1117/12.690184
Event: Optics/Photonics in Security and Defence, 2006, Stockholm, Sweden

Abstract

Quantum key distribution (QKD)¹is the first method of quantum information science that will find its way into our everyday life. It employs fundamental laws of quantum physics to ensure provably secure symmetric key generation between two parties. The key can then be used to encrypt and decrypt sensitive data with unconditional security. Here, we report on a free space QKD implementation over a distance of 480 m using strongly attenuated laser pulses. It is designed to work continuously without human interaction. Until now, it produces quantum keys unattended at night for more than 12 hours with a sifted key rate of more than 50 kbit/s on average and a quantum bit error rate between 3% and 5%.

Citation Download Citation

M. Fürst, T. Schmitt-Manderbach, H. Weier, I. Ordavo, and H. Weinfurter "Free-space quantum cryptography for metropolitan areas", Proc. SPIE 6399, Advanced Free-Space Optical Communication Techniques/Applications II and Photonic Components/Architectures for Microwave Systems and Displays, 63990I (16 October 2006); https://doi.org/10.1117/12.690184

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available