Quantum Cryptography over Underground Optical Fibers

  • R. J. Hughes
  • G. G. Luther
  • G. L. Morgan
  • C. G. Peterson
  • C. Simmons
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1109)


Quantum cryptography is an emerging technology in which two parties may simultaneously generate shared, secret cryptographic key material using the transmission of quantum states of light whose security is based on the inviolability of the laws of quantum mechanics. An adversary can neither successfully tap the key transmissions, nor evade detection, owing to Heisenberg’s uncertainty principle. In this paper we describe the theory of quantum cryptography, and the most recent results from our experimental system with which we are generating key material over 14-km of underground optical fiber. These results demonstrate that optical-fiber based quantum cryptography could allow secure, real-time key generation over “open” multi-km node-to-node optical fiber communications links between secure “islands.”


Optical Fiber Quantum Cryptography Noise Rate True Random Number Generation Quantum Cryptography Protocol 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 1996

Authors and Affiliations

  • R. J. Hughes
    • 1
  • G. G. Luther
    • 1
  • G. L. Morgan
    • 1
  • C. G. Peterson
    • 1
  • C. Simmons
    • 1
  1. 1.Physics Division, Los Alamos National LaboratoryUniversity of CaliforniaLos AlamosUSA

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