Distance-Security Tradeoffs for Repeaterless End-to-End QKD Networks
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866915893697576960 |
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| author | Chaudhary, Sumit Calsi, Davide Li Choi, JinHyeock Geitz, Marc Nötzel, Janis |
| author_facet | Chaudhary, Sumit Calsi, Davide Li Choi, JinHyeock Geitz, Marc Nötzel, Janis |
| contents | Quantum Key Distribution (QKD) offers provably secure, information-theoretic key exchange, but in long-distance scenarios without quantum repeaters, Trusted Nodes (TNs) are commonly employed despite introducing critical security risks. We propose a redundant key management method for QKD network that combines Twin Field QKD (TF-QKD) (or Measurement-Device Independent (MDI)-QKD) with a novel key-routing scheme to eliminate the need for truly trusted TNs. Quantum measurements are handled entirely within the network, minimizing end-user hardware requirements. Multiple QKD links connect intermediate nodes such that a successful attack requires the collusion of multiple adversarial nodes, greatly enhancing security over the traditional TN model. In this contribution, we discuss the tradeoff between security, key rates, and distances supported by the new method. Our analysis reveals that the improved redundant key management system may enable true end-to-end connectivity over several thousand kilometers while maintaining high security standards. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_17547 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Distance-Security Tradeoffs for Repeaterless End-to-End QKD Networks Chaudhary, Sumit Calsi, Davide Li Choi, JinHyeock Geitz, Marc Nötzel, Janis Quantum Physics Cryptography and Security Quantum Key Distribution (QKD) offers provably secure, information-theoretic key exchange, but in long-distance scenarios without quantum repeaters, Trusted Nodes (TNs) are commonly employed despite introducing critical security risks. We propose a redundant key management method for QKD network that combines Twin Field QKD (TF-QKD) (or Measurement-Device Independent (MDI)-QKD) with a novel key-routing scheme to eliminate the need for truly trusted TNs. Quantum measurements are handled entirely within the network, minimizing end-user hardware requirements. Multiple QKD links connect intermediate nodes such that a successful attack requires the collusion of multiple adversarial nodes, greatly enhancing security over the traditional TN model. In this contribution, we discuss the tradeoff between security, key rates, and distances supported by the new method. Our analysis reveals that the improved redundant key management system may enable true end-to-end connectivity over several thousand kilometers while maintaining high security standards. |
| title | Distance-Security Tradeoffs for Repeaterless End-to-End QKD Networks |
| topic | Quantum Physics Cryptography and Security |
| url | https://arxiv.org/abs/2411.17547 |