2004/05/28 by Fu-Guo Deng, Gui Lu Long · 1 citation
Physics and Astronomy · #quant-ph
paper · pdf · doi:10.1103/physreva.69.052319
published as Physical Review A 69, 052319 (2004) · 4 pages and one figure
arxiv created 2004/05/28 · arxiv updated 2009/12/01
Quantum secure direct communication is the direct communication of secret messages without first producing a shared secret key. It maybe used in some urgent circumstances. Here we propose a quantum secure direct communication protocol using single photons. The protocol uses batches of single photons prepared randomly in one of four different states. These single photons serve as a one-time-pad which are used directly to encode the secret messages in one communication process. We also show that it is unconditionally secure. The protocol is feasible with present-day technique.