Security of Binary Modulated Continuous Variable Quantum Key Distribution Using Optimally Displaced Threshold Detection
| Autor: | Julian Cheng, Renzhi Yuan, Shuai Han, Mufei Zhao |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Noise measurement
Computer science business.industry Binary number 020206 networking & telecommunications 02 engineering and technology Mutual information Quantum key distribution Topology Computer Science Applications Transmission (telecommunications) Modeling and Simulation 0202 electrical engineering electronic engineering information engineering Key (cryptography) Electrical and Electronic Engineering Photonics business Communication channel |
| Zdroj: | IEEE Communications Letters. 25:1089-1093 |
| ISSN: | 2373-7891 1089-7798 |
| DOI: | 10.1109/lcomm.2020.3048266 |
| Popis: | Continuous variable quantum key distribution attracts increasing attention in recent years due to its potential high secret key rates and the compatibility with existing communication infrastructure. This letter derives the secret key rate for a binary modulated continuous variable quantum key distribution using an optimally displaced threshold detection and post-selection. To improve the secret key rate, we optimize the post selected area and the coherent amplitude for different transmission efficiency of the channel under different thermal noises. Both the individual and collective beamsplitter attacks are considered. Numerical results show that the secret key rate using the optimally displaced threshold detection can surpass that using the classical detection scheme under different transmission efficiencies and different thermal noises. Besides, more improvement on the secret key rate can be obtained when the transmission efficiency is low. |
| Databáze: | OpenAIRE |
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