Paper Info
Title
Unidimensional Continuous-Variable Quantum Key Distribution with Untrusted Detection under Realistic Conditions
Abstract
A unidimensional continuous-variable quantum key distribution protocol with untrusted detection is proposed, where the two legitimate partners send unidimensional modulated or Gaussian-modulated coherent states to an untrusted third party, i.e., Charlie, to realize the measurement. Compared with the Gaussian-modulated coherent-state protocols, the unidimensional modulated protocols take the advantage of easy modulation, low cost, and only a small number of random numbers required. Security analysis shows that the proposed protocol cannot just defend all detectors side channels, but also achieve great performance under certain conditions. Specifically, three cases are discussed in detail, including using unidimensional modulated coherent states in Alice's side, in Bob's side, and in both sides under realistic conditions, respectively. Under the three conditions, we derive the expressions of the secret key rate and give the optimal gain parameters. It is found that the optimal performance of the protocol is achieved by using unidimensional modulated coherent states in both Alice's and Bob's side. The resulting protocol shows the potential for long-distance secure communication using the unidimensional quantum key distribution protocol with simple modulation method and untrusted detection under realistic conditions.
Year
DOI
Venue
2019
10.3390/e21111100
ENTROPY
Keywords
Field
DocType
unidimensional modulated coherent states,continuous-variable quantum key distribution,untrusted detection
Quantum key distribution,Topology,Mathematical optimization,Expression (mathematics),Communication channel,Modulation,Security analysis,Coherent states,Detector,Mathematics,Secure communication
Journal
Volume
Issue
Citations 
21
11
0
PageRank 
References 
Authors
0.34
0
4
Name
Order
Citations
PageRank
Luyu Huang100.68
YiChen Zhang22610.72
Zi-yang Chen36914.25
Song Yu4309.79