Experimental Multi-Dimensional Side-Channel-Secure Quantum Key Distribution
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arXiv
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| Main Authors: | , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866913810169724928 |
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| author | Dong, Hao Jiang, Cong Ma, Di Zhang, Chi Huang, Jia Li, Hao You, Li-Xing Liu, Yang Wang, Xiang-Bin Zhang, Qiang Pan, Jian-Wei |
| author_facet | Dong, Hao Jiang, Cong Ma, Di Zhang, Chi Huang, Jia Li, Hao You, Li-Xing Liu, Yang Wang, Xiang-Bin Zhang, Qiang Pan, Jian-Wei |
| contents | Quantum key distribution (QKD) theoretically provides unconditional security between remote parties. However, guaranteeing practical security through device characterisation alone is challenging in real-world implementations due to the multi-dimensional spaces in which the devices may be operated. The side-channel-secure (SCS)-QKD protocol, which only requires bounding the upper limits of the intensities for the two states, theoretically provides a rigorous solution to the challenge and achieves measurement-device-independent security in detection and security for whatever multi-dimensional side channel attack in the source. Here, we demonstrate a practical implementation of SCS-QKD, achieving a secure key rate of $6.60$ kbps through a 50.5 km fibre and a maximum distribution distance of 101.1 km while accounting for finite-size effects. Our experiment also represents an approximate forty-times improvement over the previous experiment. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_19242 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Experimental Multi-Dimensional Side-Channel-Secure Quantum Key Distribution Dong, Hao Jiang, Cong Ma, Di Zhang, Chi Huang, Jia Li, Hao You, Li-Xing Liu, Yang Wang, Xiang-Bin Zhang, Qiang Pan, Jian-Wei Quantum Physics Quantum key distribution (QKD) theoretically provides unconditional security between remote parties. However, guaranteeing practical security through device characterisation alone is challenging in real-world implementations due to the multi-dimensional spaces in which the devices may be operated. The side-channel-secure (SCS)-QKD protocol, which only requires bounding the upper limits of the intensities for the two states, theoretically provides a rigorous solution to the challenge and achieves measurement-device-independent security in detection and security for whatever multi-dimensional side channel attack in the source. Here, we demonstrate a practical implementation of SCS-QKD, achieving a secure key rate of $6.60$ kbps through a 50.5 km fibre and a maximum distribution distance of 101.1 km while accounting for finite-size effects. Our experiment also represents an approximate forty-times improvement over the previous experiment. |
| title | Experimental Multi-Dimensional Side-Channel-Secure Quantum Key Distribution |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2504.19242 |