Quantum cryptographic system with reduced data loss

Lo, Hoi-Kwong; Chau, Hoi Fung

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:

Lo, Hoi-Kwong ^[1]; Chau, Hoi Fung ^[2]

1309, Low Block, Lei Moon House Ap Lei Chau Estate, Hong Kong, HK
Flat C, 42nd Floor, Tower 1, University Heights 23 Pokfield Road, Pokfulam, Hong Kong, HK

Issue Date:: 1998-03-24

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)

Patent Classifications (CPCs):: H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04L - TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION

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H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04L - TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
H04L9/0858 - {Details about key distillation or coding, e.g. reconciliation, error correction, privacy amplification, polarisation coding or phase coding}

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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.

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                    Lo, Hoi-Kwong, & Chau, Hoi Fung. Quantum cryptographic system with reduced data loss.  United States.

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                    Lo, Hoi-Kwong, and Chau, Hoi Fung. Tue .  
        "Quantum cryptographic system with reduced data loss".  United States.  https://www.osti.gov/servlets/purl/871443.

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@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        = {3}

}

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Works referenced in this record:

Quantum cryptographic network based on quantum memories
journal, October 1996

Biham, Eli; Huttner, Bruno; Mor, Tal
Physical Review A, Vol. 54, Issue 4, p. 2651-2658
https://doi.org/10.1103/PhysRevA.54.2651

Bell's Inequality and Rejected-data Protocols for Quantum Cryptography
journal, August 1993

Barnett, Stephen M.; Phoenix, Simon J. D.
Journal of Modern Optics, Vol. 40, Issue 8
https://doi.org/10.1080/09500349314551511

Experimental quantum cryptography
journal, January 1992

Bennett, CharlesH.; Bessette, Fran�ois; Brassard, Gilles
Journal of Cryptology, Vol. 5, Issue 1
https://doi.org/10.1007/BF00191318

Quantum cryptography based on Bell’s theorem
journal, August 1991

Ekert, Artur K.
Physical Review Letters, Vol. 67, Issue 6
https://doi.org/10.1103/PhysRevLett.67.661

Quantum Cryptography
journal, October 1992

Bennett, Charles H.; Brassard, Gilles; Ekert, Artur K.
Scientific American, Vol. 267, Issue 4
https://doi.org/10.1038/scientificamerican1092-50

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Title: Quantum cryptographic system with reduced data loss

Abstract

Citation Formats

Quantum cryptographic network based on quantum memories journal, October 1996

Bell's Inequality and Rejected-data Protocols for Quantum Cryptography journal, August 1993

Experimental quantum cryptography journal, January 1992

Quantum cryptography based on Bell’s theorem journal, August 1991

Quantum Cryptography journal, October 1992

Quantum cryptographic network based on quantum memories
journal, October 1996

Bell's Inequality and Rejected-data Protocols for Quantum Cryptography
journal, August 1993

Experimental quantum cryptography
journal, January 1992

Quantum cryptography based on Bell’s theorem
journal, August 1991

Quantum Cryptography
journal, October 1992