Quantum cryptographic system with reduced data loss

Title: Quantum cryptographic system with reduced data loss

Full Record
Other Related Research

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:: 1998-01-01

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

Show more

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}

Show less

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.

Copy to clipboard


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

Copy to clipboard


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

Copy to clipboard


                    
@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}

}

Copy to clipboard

Patent:

View Patent

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE Patents and OSTI.GOV collections:

Quantum cryptographic system with reduced data loss

Patent Lo, H K; Chau, H F

A secure method for distributing a random cryptographic key with reduced data loss is disclosed. 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 ratemore »« less
Reducing fischer-tropsch catalyst attrition losses in high agitation reaction systems

Patent Singleton, Alan H [Baden, PA]; Oukaci, Rachid [Gibsonia, PA]; Goodwin, James G [Cranberry Township, PA]

A method for reducing catalyst attrition losses in hydrocarbon synthesis processes conducted in high agitation reaction systems; a method of producing an attrition-resistant catalyst; a catalyst produced by such method; a method of producing an attrition-resistant catalyst support; and a catalyst support produced by such method. The inventive method of reducing catalyst attrition losses comprises the step of reacting a synthesis gas in a high agitation reaction system in the presence of a catalyst. In one aspect, the catalyst preferably comprises a .gamma.-alumina support including an amount of titanium effective for increasing the attrition resistance of the catalyst. In anothermore »« less
Full Text Available
Method for exponentiating in cryptographic systems

Patent Brickell, Ernest F [Albuquerque, NM]; Gordon, Daniel M [San Diego, CA]; McCurley, Kevin S [Albuquerque, NM]

An improved cryptographic method utilizing exponentiation is provided which has the advantage of reducing the number of multiplications required to determine the legitimacy of a message or user. The basic method comprises the steps of selecting a key from a preapproved group of integer keys g; exponentiating the key by an integer value e, where e represents a digital signature, to generate a value g.sup.e ; transmitting the value g.sup.e to a remote facility by a communications network; receiving the value g.sup.e at the remote facility; and verifying the digital signature as originating from the legitimate user. The exponentiating stepmore »« less
Full Text Available
Apparatus, system and method for providing cryptographic key information with physically unclonable function circuitry

Patent Areno, Matthew

Techniques and mechanisms for providing a value from physically unclonable function (PUF) circuitry for a cryptographic operation of a security module. In an embodiment, a cryptographic engine receives a value from PUF circuitry and based on the value, outputs a result of a cryptographic operation to a bus of the security module. The bus couples the cryptographic engine to control logic or interface logic of the security module. In another embodiment, the value is provided to the cryptographic engine from the PUF circuitry via a signal line which is distinct from the bus, where any exchange of the value bymore »« less
Full Text Available
Cryptographic synchronization recovery by measuring randomness of decrypted data

Patent Maestas, Joseph H [Albuquerque, NM]; Pierson, Lyndon G [Albuquerque, NM]

The invention relates to synchronization of encrypted data communication systems and a method which looks for any lack of pattern or intelligent information in the received data and triggers a resynchronization signal based thereon. If the encrypter/decrypter pairs are out of cryptographic synchronization, the received (decrypted) data resembles pseudorandom data. A method and system are provided for detecting such pseudorandom binary data by, for example, ones density. If the data is sufficiently random the system is resynchronized.
Full Text Available

Similar Records