Quantum cryptography for secure free-space communications

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The secure distribution of the secret random bit sequences known as key material, is an essential precursor to their use for the encryption and decryption of confidential communications. Quantum cryptography is a new technique for secure key distribution with single-photon transmissions: Heisenberg`s uncertainty principle ensures that an adversary can neither successfully tap the key transmissions, nor evade detection (eavesdropping raises the key error rate above a threshold value). The authors have developed experimental quantum cryptography systems based on the transmission of non-orthogonal photon polarization states to generate shared key material over line-of-sight optical links. Key material is built up using ... continued below

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6 p.

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Hughes, R. J.; Buttler, W. T.; Kwiat, P. G.; Lamoreaux, S. K.; Luther, G. G.; Morgan, G. L. et al. March 1, 1999.

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Description

The secure distribution of the secret random bit sequences known as key material, is an essential precursor to their use for the encryption and decryption of confidential communications. Quantum cryptography is a new technique for secure key distribution with single-photon transmissions: Heisenberg`s uncertainty principle ensures that an adversary can neither successfully tap the key transmissions, nor evade detection (eavesdropping raises the key error rate above a threshold value). The authors have developed experimental quantum cryptography systems based on the transmission of non-orthogonal photon polarization states to generate shared key material over line-of-sight optical links. Key material is built up using the transmission of a single-photon per bit of an initial secret random sequence. A quantum-mechanically random subset of this sequence is identified, becoming the key material after a data reconciliation stage with the sender. The authors have developed and tested a free-space quantum key distribution (QKD) system over an outdoor optical path of {approximately}1 km at Los Alamos National Laboratory under nighttime conditions. Results show that free-space QKD can provide secure real-time key distribution between parties who have a need to communicate secretly. Finally, they examine the feasibility of surface to satellite QKD.

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6 p.

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INIS; OSTI as DE99002003

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  • Photonics West `99: international symposium on biomedical optics (BIOS`99), San Jose, CA (United States), 23-29 Jan 1999

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  • Other: DE99002003
  • Report No.: LA-UR--99-130
  • Report No.: CONF-990110--
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 329544
  • Archival Resource Key: ark:/67531/metadc685527

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • March 1, 1999

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • May 20, 2016, 1:48 p.m.

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Hughes, R. J.; Buttler, W. T.; Kwiat, P. G.; Lamoreaux, S. K.; Luther, G. G.; Morgan, G. L. et al. Quantum cryptography for secure free-space communications, article, March 1, 1999; New Mexico. (digital.library.unt.edu/ark:/67531/metadc685527/: accessed November 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.