Experimental composable key distribution using discrete-modulated continuous variable quantum cryptography
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arXiv
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866909912388337664 |
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| author | Hajomer, Adnan A. E. Kanitschar, Florian Jain, Nitin Hentschel, Michael Zhang, Runjia Lütkenhaus, Norbert Andersen, Ulrik L. Pacher, Christoph Gehring, Tobias |
| author_facet | Hajomer, Adnan A. E. Kanitschar, Florian Jain, Nitin Hentschel, Michael Zhang, Runjia Lütkenhaus, Norbert Andersen, Ulrik L. Pacher, Christoph Gehring, Tobias |
| contents | Establishing secure data communication necessitates secure key exchange over a public channel. Quantum key distribution (QKD), which leverages the principles of quantum physics, can achieve this with information-theoretic security. The discrete modulated (DM) continuous variable (CV) QKD protocol, in particular, is a suitable candidate for large-scale deployment of quantum-safe communication due to its simplicity and compatibility with standard high-speed telecommunication technology. Here, we present the first experimental demonstration of a four-state DM CVQKD system, successfully generating composable finite-size keys, secure against collective attacks over a 20 km fiber channel with 2.3 \times 10^{9} coherent quantum states, achieving a positive composable key rate of 11.04 \times 10^{-3} bits/symbol. This accomplishment is enabled by using an advanced security proof, meticulously selecting its parameters, and the fast, stable operation of the system. Our results mark a significant step toward the large-scale deployment of practical, high-performance, cost-effective, and highly secure quantum key distribution networks using standard telecommunication components. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_13702 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Experimental composable key distribution using discrete-modulated continuous variable quantum cryptography Hajomer, Adnan A. E. Kanitschar, Florian Jain, Nitin Hentschel, Michael Zhang, Runjia Lütkenhaus, Norbert Andersen, Ulrik L. Pacher, Christoph Gehring, Tobias Quantum Physics Establishing secure data communication necessitates secure key exchange over a public channel. Quantum key distribution (QKD), which leverages the principles of quantum physics, can achieve this with information-theoretic security. The discrete modulated (DM) continuous variable (CV) QKD protocol, in particular, is a suitable candidate for large-scale deployment of quantum-safe communication due to its simplicity and compatibility with standard high-speed telecommunication technology. Here, we present the first experimental demonstration of a four-state DM CVQKD system, successfully generating composable finite-size keys, secure against collective attacks over a 20 km fiber channel with 2.3 \times 10^{9} coherent quantum states, achieving a positive composable key rate of 11.04 \times 10^{-3} bits/symbol. This accomplishment is enabled by using an advanced security proof, meticulously selecting its parameters, and the fast, stable operation of the system. Our results mark a significant step toward the large-scale deployment of practical, high-performance, cost-effective, and highly secure quantum key distribution networks using standard telecommunication components. |
| title | Experimental composable key distribution using discrete-modulated continuous variable quantum cryptography |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2410.13702 |