Analysis of decoy state quantum-key-distribution system | Zendy

Rongzhen Jiao | Zendy; Wenhan Zhang | Zendy

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Analysis of decoy state quantum-key-distribution system

Author(s) -

Rongzhen Jiao,

Wenhan Zhang

Publication year - 2009

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.58.2189

Subject(s) - decoy , quantum key distribution , key generation , computer science , signal (programming language) , state (computer science) , physics , topology (electrical circuits) , photon , statistical physics , quantum mechanics , algorithm , mathematics , cryptography , biochemistry , chemistry , receptor , combinatorics , programming language

The security of quantum-key-distribution system is analyzed using the decoy state protocol with two weak decoy states and one signal state. The comparison is based on the key generation rate as a function of distance for two types of decoy states: the vacuum and a weak decoy state, asymptotically approaching the theoretical limit of the most general type of decoy protocol, one-decoy-state protocol. We studied the two-decoy-state protocol in connection with the intensity of signal state, and the gain of signal states, the overall quantum bit error rate, the gain of single-photon states and the error rate of single-photon states and arrived at the optimal condition which maximizes the key generation rate.

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