Paper Info
Title
Unidimensional Two-Way Continuous-Variable Quantum Key Distribution Using Coherent States
Abstract
We propose a unidimensional two-way continuous-variable quantum key distribution protocol with coherent states, where the sender modulates a single quadrature of the coherent states rather than both quadratures to simplify the structure of a two-way system. Security analysis is performed with a general attack strategy, known as two-mode attack, which helps to reduce limitations in the analysis. The performance of the protocol under all accessible two-mode attacks at fixed distance is illustrated. Further, two typical two-mode attack strategies are obtained from it, which are one-mode attack strategy and optimal two-mode attack strategy. Between them, the one-mode attack is the simplest form of the two-mode attack, while the optimal two-mode attack is the most complicated one. Simulations show that though the system is simplified, the performance of the two-way protocol with unidimensional modulation is still comparable to that of the counterpart with Gaussian modulation even against the optimal two-mode attack when Eve's ability is maximized. Thus, the proposed protocol simplifies the two-way system while guaranteeing its performance to a certain extent. Especially in a practical system with short transmission distance and high excess noise, the protocol has a good application prospect.
Year
DOI
Venue
2021
10.3390/e23030294
ENTROPY
Keywords
DocType
Volume
continuous-variable quantum key distribution, two-way scheme, unidimensional modulation, general two-mode attacks, optimal attack strategy
Journal
23
Issue
ISSN
Citations 
3
1099-4300
0
PageRank 
References 
Authors
0.34
0
3
Name
Order
Citations
PageRank
Yiming Bian100.68
Luyu Huang200.68
YiChen Zhang32610.72