Some conservative estimates in quantum cryptography

Journal Article · Tue Aug 15 00:00:00 EDT 2006 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776106080036· OSTI ID:21067661

Molotkov, S. N. ^[1]

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1. Russian Academy of Sciences, Institute of Solid-State Physics (Russian Federation), E-mail: [e-mail]

Relationship is established between the security of the BB84 quantum key distribution protocol and the forward and converse coding theorems for quantum communication channels. The upper bound Q{sub c} {approx} 11% on the bit error rate compatible with secure key distribution is determined by solving the transcendental equation H(Q{sub c})=C-bar({rho})/2, where {rho} is the density matrix of the input ensemble, C-bar({rho}) is the classical capacity of a noiseless quantum channel, and H(Q) is the capacity of a classical binary symmetric channel with error rate Q.

• OSTI ID: 21067661
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 103, Issue 2; Other Information: DOI: 10.1134/S1063776106080036; Copyright (c) 2006 Nauka/Interperiodica; Article Copyright (c) 2006 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CAPACITY
DATA TRANSMISSION
DENSITY MATRIX
EQUATIONS
ERRORS
QUANTUM CRYPTOGRAPHY
QUANTUM INFORMATION
QUANTUM MECHANICS
SECURITY