Monitoring an untrusted light source with single-photon detectors in measurement-device-independent quantum key distribution
| Autor: | Bingjie Xu, Zhengyu Li, Gan Wang, Hong Guo, Yucheng Qiao |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Scheme (programming language) Ideal (set theory) Decoy state Detector Quantum key distribution 01 natural sciences 010305 fluids & plasmas Transmission (telecommunications) 0103 physical sciences Electronic engineering Key (cryptography) 010306 general physics Protocol (object-oriented programming) computer computer.programming_language |
| Zdroj: | Physical Review A. 99 |
| ISSN: | 2469-9934 2469-9926 |
| DOI: | 10.1103/physreva.99.052302 |
| Popis: | Measurement-device-independent quantum key distribution (MDI-QKD) is proposed to close the loopholes of the detection part in QKD systems, while it still requires the light source to be trusted. This assumption is not guaranteed in practice, leading to practical secure issues. In this paper, we propose a light source monitoring scheme with single-photon detectors for MDI-QKD, which can guarantee the security of the system under the untrusted source condition with both common decoy state method and the newly proposed five-intensity decoy state method. Moreover, our monitoring scheme performs almost the same as the ideal MDI protocol even considering the imperfect factors in practical systems. Compared to the previous scheme, our work improves the secure key rate and the transmission distance of practical MDI-QKD systems significantly. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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