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Title: Quantum cryptographic system with reduced data loss

Abstract

A secure method for distributing a random cryptographic key with reduced data loss. Traditional quantum key distribution systems employ similar probabilities for the different communication modes and thus reject at least half of the transmitted data. The invention substantially reduces the amount of discarded data (those that are encoded and decoded in different communication modes e.g. using different operators) in quantum key distribution without compromising security by using significantly different probabilities for the different communication modes. Data is separated into various sets according to the actual operators used in the encoding and decoding process and the error rate for each set is determined individually. The invention increases the key distribution rate of the BB84 key distribution scheme proposed by Bennett and Brassard in 1984. Using the invention, the key distribution rate increases with the number of quantum signals transmitted and can be doubled asymptotically.

Inventors:
 [1];  [2]
  1. (1309, Low Block, Lei Moon House Ap Lei Chau Estate, Hong Kong, HK)
  2. (Flat C, 42nd Floor, Tower 1, University Heights 23 Pokfield Road, Pokfulam, Hong Kong, HK)
Issue Date:
Research Org.:
Institute for Advanced Study, Princeton, NJ (United States)
OSTI Identifier:
871443
Patent Number(s):
5732139
Assignee:
Lo, Hoi-Kwong (1309, Low Block, Lei Moon House Ap Lei Chau Estate, Hong Kong, HK);Chau, Hoi Fung (Flat C, 42nd Floor, Tower 1, University Heights 23 Pokfield Road, Pokfulam, Hong Kong, HK) CHO
DOE Contract Number:  
FG02-90ER40542
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
quantum; cryptographic; reduced; data; loss; secure; method; distributing; random; key; traditional; distribution; systems; employ; similar; probabilities; communication; modes; reject; half; transmitted; substantially; reduces; amount; discarded; encoded; decoded; operators; compromising; security; significantly; separated; various; sets; according; encoding; decoding; process; error; rate; set; determined; individually; increases; bb84; scheme; proposed; bennett; brassard; 1984; signals; doubled; asymptotically; substantially reduces; transmitted data; substantially reduce; signals transmitted; distribution systems; reduced data; systems employ; data loss; /380/

Citation Formats

Lo, Hoi-Kwong, and Chau, Hoi Fung. Quantum cryptographic system with reduced data loss. United States: N. p., 1998. Web.
Lo, Hoi-Kwong, & Chau, Hoi Fung. Quantum cryptographic system with reduced data loss. United States.
Lo, Hoi-Kwong, and Chau, Hoi Fung. Thu . "Quantum cryptographic system with reduced data loss". United States. https://www.osti.gov/servlets/purl/871443.
@article{osti_871443,
title = {Quantum cryptographic system with reduced data loss},
author = {Lo, Hoi-Kwong and Chau, Hoi Fung},
abstractNote = {A secure method for distributing a random cryptographic key with reduced data loss. Traditional quantum key distribution systems employ similar probabilities for the different communication modes and thus reject at least half of the transmitted data. The invention substantially reduces the amount of discarded data (those that are encoded and decoded in different communication modes e.g. using different operators) in quantum key distribution without compromising security by using significantly different probabilities for the different communication modes. Data is separated into various sets according to the actual operators used in the encoding and decoding process and the error rate for each set is determined individually. The invention increases the key distribution rate of the BB84 key distribution scheme proposed by Bennett and Brassard in 1984. Using the invention, the key distribution rate increases with the number of quantum signals transmitted and can be doubled asymptotically.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {1}
}

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