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Title: Secure communications with low-orbit spacecraft using quantum cryptography

Abstract

Apparatus and method for secure communication between an earth station and spacecraft. A laser outputs single pulses that are split into preceding bright pulses and delayed attenuated pulses, and polarized. A Pockels cell changes the polarization of the polarized delayed attenuated pulses according to a string of random numbers, a first polarization representing a "1," and a second polarization representing a "0." At the receiving station, a beamsplitter randomly directs the preceding bright pulses and the polarized delayed attenuated pulses onto longer and shorter paths, both terminating in a beamsplitter which directs the preceding bright pulses and a first portion of the polarized delayed attenuated pulses to a first detector, and a second portion of the polarized delayed attenuated pulses to a second detector to generate a key for secure communication between the earth station and the spacecraft.

Inventors:
 [1];  [1];  [1];  [1];  [2];  [1];  [1];  [1]
  1. Los Alamos, NM
  2. Jemez Springs, NM
Issue Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
OSTI Identifier:
872585
Patent Number(s):
5966224
Assignee:
Regents of University of California (Los Alamos, NM)
Patent Classifications (CPCs):
H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04L - TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
secure; communications; low-orbit; spacecraft; quantum; cryptography; apparatus; method; communication; earth; station; laser; outputs; single; pulses; split; preceding; bright; delayed; attenuated; polarized; pockels; cell; changes; polarization; according; string; random; representing; receiving; beamsplitter; randomly; directs; shorter; paths; terminating; portion; detector; generate; key; laser output; pockels cell; single pulse; receiving station; secure communication; orbit space; laser outputs; /359/380/

Citation Formats

Hughes, Richard J, Buttler, William T, Kwiat, Paul G, Luther, Gabriel G, Morgan, George L, Nordholt, Jane E, Peterson, Charles G, and Simmons, Charles M. Secure communications with low-orbit spacecraft using quantum cryptography. United States: N. p., 1999. Web.
Hughes, Richard J, Buttler, William T, Kwiat, Paul G, Luther, Gabriel G, Morgan, George L, Nordholt, Jane E, Peterson, Charles G, & Simmons, Charles M. Secure communications with low-orbit spacecraft using quantum cryptography. United States.
Hughes, Richard J, Buttler, William T, Kwiat, Paul G, Luther, Gabriel G, Morgan, George L, Nordholt, Jane E, Peterson, Charles G, and Simmons, Charles M. Fri . "Secure communications with low-orbit spacecraft using quantum cryptography". United States. https://www.osti.gov/servlets/purl/872585.
@article{osti_872585,
title = {Secure communications with low-orbit spacecraft using quantum cryptography},
author = {Hughes, Richard J and Buttler, William T and Kwiat, Paul G and Luther, Gabriel G and Morgan, George L and Nordholt, Jane E and Peterson, Charles G and Simmons, Charles M},
abstractNote = {Apparatus and method for secure communication between an earth station and spacecraft. A laser outputs single pulses that are split into preceding bright pulses and delayed attenuated pulses, and polarized. A Pockels cell changes the polarization of the polarized delayed attenuated pulses according to a string of random numbers, a first polarization representing a "1," and a second polarization representing a "0." At the receiving station, a beamsplitter randomly directs the preceding bright pulses and the polarized delayed attenuated pulses onto longer and shorter paths, both terminating in a beamsplitter which directs the preceding bright pulses and a first portion of the polarized delayed attenuated pulses to a first detector, and a second portion of the polarized delayed attenuated pulses to a second detector to generate a key for secure communication between the earth station and the spacecraft.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

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Works referenced in this record:

Single photon interference in 10 km long optical fibre interferometer
journal, January 1993


Enhanced single photon fringe visibility in a 10 km-long prototype quantum cryptography channel
journal, January 1993


Secure key distribution system based on quantum cryptography
journal, May 1994


Multi-user Quantum Cryptography on Optical Networks
journal, June 1995