In quantum communication, passive decoy-state QKD protocols can eliminate many side channels, but the protocols without any finite-key analyses are not suitable for in practice. The finite-key securities of passive decoy-state (PDS) QKD protocols with two different unstable sources, type-II parametric down-convention (PDC) and phase randomized weak coherent pulses (WCPs), are analyzed in our paper. According to the PDS QKD protocols, we establish an optimizing programming respectively and obtain the lower bounds of finite-key rates. Under some reasonable values of quantum setup parameters, the lower bounds of finite-key rates are simulated. The simulation results show that at different transmission distances, the affections of different fluctuations on key rates are different. Moreover, the PDS QKD protocol with an unstable PDC source can resist more intensity fluctuations and more statistical fluctuation.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4607920PMC
http://dx.doi.org/10.1038/srep15276DOI Listing

Publication Analysis

Top Keywords

qkd protocols
16
passive decoy-state
12
pds qkd
12
decoy-state qkd
8
protocols unstable
8
unstable sources
8
lower bounds
8
bounds finite-key
8
finite-key rates
8
finite-key
5

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!