Quantum cryptographic system with reduced data loss
Abstract
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 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. 23 figs.
- Inventors:
- Issue Date:
- Research Org.:
- Institute for Advanced Study, Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 597128
- Patent Number(s):
- 5732139
- Application Number:
- PAN: 8-701,785
- Assignee:
- PTO; SCA: 990200; PA: EDB-98:047230; SN: 98001932714
- DOE Contract Number:
- FG02-90ER40542
- Resource Type:
- Patent
- Resource Relation:
- Other Information: PBD: 24 Mar 1998
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 99 MATHEMATICS, COMPUTERS, INFORMATION SCIENCE, MANAGEMENT, LAW, MISCELLANEOUS; SECRECY PROTECTION; DATA PROCESSING; DATA TRANSMISSION; SECURITY; DESIGN
Citation Formats
Lo, H K, and Chau, H F. Quantum cryptographic system with reduced data loss. United States: N. p., 1998.
Web.
Lo, H K, & Chau, H F. Quantum cryptographic system with reduced data loss. United States.
Lo, H K, and Chau, H F. Tue .
"Quantum cryptographic system with reduced data loss". United States.
@article{osti_597128,
title = {Quantum cryptographic system with reduced data loss},
author = {Lo, H K and Chau, H F},
abstractNote = {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 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. 23 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 24 00:00:00 EST 1998},
month = {Tue Mar 24 00:00:00 EST 1998}
}