Secure direct communication with a quantum one-time pad

Fu-Guo Deng and Gui Lu Long
Phys. Rev. A 69, 052319 – Published 17 May 2004

Abstract

Quantum secure direct communication is the direct communication of secret messages without first producing a shared secret key. It may be 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 is 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.

  • Figure
  • Received 31 October 2003

DOI:https://doi.org/10.1103/PhysRevA.69.052319

©2004 American Physical Society

Authors & Affiliations

Fu-Guo Deng1,2 and Gui Lu Long1,2,3,4

  • 1Department of Physics, Tsinghua University, Beijing 100084, China
  • 2Key Laboratory For Quantum Information and Measurements, Beijing 100084, China
  • 3Center for Atomic and Molecular NanoSciences, Tsinghua University, Beijing 100084, China
  • 4Center For Quantum Information, Tsinghua University, Beijing 100084, China

Comments & Replies

Reply to “Comment on ‘Secure direct communication with a quantum one-time-pad’ ”

Fu-Guo Deng and Gui Lu Long
Phys. Rev. A 72, 016302 (2005)

Comment on “Secure direct communication with a quantum one-time pad”

Holger Hoffmann, Kim Bostroem, and Timo Felbinger
Phys. Rev. A 72, 016301 (2005)

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Vol. 69, Iss. 5 — May 2004

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