%0 Journal Article
%T Quantum Cryptography with Entangled Photons
%A Thomas Jennewein
%A Christoph Simon
%A Gregor Weihs
%A Harald WeinfurterD
%A Anton Zeilinger
%J Physics
%D 1999
%I arXiv
%R 10.1103/PhysRevLett.84.4729
%X By realizing a quantum cryptography system based on polarization entangled photon pairs we establish highly secure keys, because a single photon source is approximated and the inherent randomness of quantum measurements is exploited. We implement a novel key distribution scheme using Wigner's inequality to test the security of the quantum channel, and, alternatively, realize a variant of the BB84 protocol. Our system has two completely independent users separated by 360 m, and generates raw keys at rates of 400 - 800 bits/second with bit error rates arround 3 percent.
%U http://arxiv.org/abs/quant-ph/9912117v1