Phase-Matching Continuous-Variable Measurement-Device-Independent Quantum Key Distribution
Continuous-variable measurement-device-independent quantum key distribution (CV-MDI-QKD) allows remote parties to share information-theoretical secure keys while defending all the side-channel attacks on measurement devices. However, the secure transmission distance and the secret key rate are quite...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-03-01
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| Series: | Symmetry |
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| Online Access: | https://www.mdpi.com/2073-8994/14/3/568 |
| _version_ | 1797441587579453440 |
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| author | Peng Huang Tao Wang Duan Huang Guihua Zeng |
| author_facet | Peng Huang Tao Wang Duan Huang Guihua Zeng |
| author_sort | Peng Huang |
| collection | DOAJ |
| description | Continuous-variable measurement-device-independent quantum key distribution (CV-MDI-QKD) allows remote parties to share information-theoretical secure keys while defending all the side-channel attacks on measurement devices. However, the secure transmission distance and the secret key rate are quite limited due to the high untrusted equivalent excess noise in the Gaussian modulation. More particularly, extremely high-efficiency homodyne detections are required for even non-zero secure transmission distances, which directly restrict its practical realization. Here, we propose a CV-MDI-QKD protocol by encoding the key information into matched discrete phases of two groups of coherent states, which decreases the required detection efficiency for ideally asymmetric cases, and makes it possible to practically achieve secure key distribution with current low-efficiency homodyne detections. Besides, a proof-of-principle experiment with a locally generated oscillator is implemented, which, for the first time, demonstrates the realizability of CV-MDI-QKD using all fiber-based devices. The discrete-modulated phase-matching method provides an alternative direction of an applicable quantum key distribution with practical security. |
| first_indexed | 2024-03-09T12:25:19Z |
| format | Article |
| id | doaj.art-ecb8c6d5e8314365ba9dd6d208ac32c9 |
| institution | Directory Open Access Journal |
| issn | 2073-8994 |
| language | English |
| last_indexed | 2024-03-09T12:25:19Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Symmetry |
| spelling | doaj.art-ecb8c6d5e8314365ba9dd6d208ac32c92023-11-30T22:36:26ZengMDPI AGSymmetry2073-89942022-03-0114356810.3390/sym14030568Phase-Matching Continuous-Variable Measurement-Device-Independent Quantum Key DistributionPeng Huang0Tao Wang1Duan Huang2Guihua Zeng3State Key Laboratory of Advanced Optical Communication Systems and Networks, Center for Quantum Sensing and Information Processing, Shanghai Jiao Tong University, Shanghai 200240, ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, Center for Quantum Sensing and Information Processing, Shanghai Jiao Tong University, Shanghai 200240, ChinaSchool of Computer Science and Engineering, Central South University, Changsha 410083, ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, Center for Quantum Sensing and Information Processing, Shanghai Jiao Tong University, Shanghai 200240, ChinaContinuous-variable measurement-device-independent quantum key distribution (CV-MDI-QKD) allows remote parties to share information-theoretical secure keys while defending all the side-channel attacks on measurement devices. However, the secure transmission distance and the secret key rate are quite limited due to the high untrusted equivalent excess noise in the Gaussian modulation. More particularly, extremely high-efficiency homodyne detections are required for even non-zero secure transmission distances, which directly restrict its practical realization. Here, we propose a CV-MDI-QKD protocol by encoding the key information into matched discrete phases of two groups of coherent states, which decreases the required detection efficiency for ideally asymmetric cases, and makes it possible to practically achieve secure key distribution with current low-efficiency homodyne detections. Besides, a proof-of-principle experiment with a locally generated oscillator is implemented, which, for the first time, demonstrates the realizability of CV-MDI-QKD using all fiber-based devices. The discrete-modulated phase-matching method provides an alternative direction of an applicable quantum key distribution with practical security.https://www.mdpi.com/2073-8994/14/3/568continuous-variablemeasurement-device-independentquantum key distributionphase-matching |
| spellingShingle | Peng Huang Tao Wang Duan Huang Guihua Zeng Phase-Matching Continuous-Variable Measurement-Device-Independent Quantum Key Distribution Symmetry continuous-variable measurement-device-independent quantum key distribution phase-matching |
| title | Phase-Matching Continuous-Variable Measurement-Device-Independent Quantum Key Distribution |
| title_full | Phase-Matching Continuous-Variable Measurement-Device-Independent Quantum Key Distribution |
| title_fullStr | Phase-Matching Continuous-Variable Measurement-Device-Independent Quantum Key Distribution |
| title_full_unstemmed | Phase-Matching Continuous-Variable Measurement-Device-Independent Quantum Key Distribution |
| title_short | Phase-Matching Continuous-Variable Measurement-Device-Independent Quantum Key Distribution |
| title_sort | phase matching continuous variable measurement device independent quantum key distribution |
| topic | continuous-variable measurement-device-independent quantum key distribution phase-matching |
| url | https://www.mdpi.com/2073-8994/14/3/568 |
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