Refined finite-size analysis of binary-modulation continuous-variable quantum key distribution
Recent studies showed the finite-size security of binary-modulation CV-QKD protocols against general attacks. However, they gave poor key-rate scaling against transmission distance. Here, we extend the security proof based on complementarity, which is used in the discrete-variable QKD, to the previo...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften
2023-08-01
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| Series: | Quantum |
| Online Access: | https://quantum-journal.org/papers/q-2023-08-29-1095/pdf/ |
| _version_ | 1797733511193427968 |
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| author | Takaya Matsuura Shinichiro Yamano Yui Kuramochi Toshihiko Sasaki Masato Koashi |
| author_facet | Takaya Matsuura Shinichiro Yamano Yui Kuramochi Toshihiko Sasaki Masato Koashi |
| author_sort | Takaya Matsuura |
| collection | DOAJ |
| description | Recent studies showed the finite-size security of binary-modulation CV-QKD protocols against general attacks. However, they gave poor key-rate scaling against transmission distance. Here, we extend the security proof based on complementarity, which is used in the discrete-variable QKD, to the previously developed binary-modulation CV-QKD protocols with the reverse reconciliation under the finite-size regime and obtain large improvements in the key rates. Notably, the key rate in the asymptotic limit scales linearly against the attenuation rate, which is known to be optimal scaling but is not achieved in previous finite-size analyses. This refined security approach may offer full-fledged security proofs for other discrete-modulation CV-QKD protocols. |
| first_indexed | 2024-03-12T12:30:08Z |
| format | Article |
| id | doaj.art-e1c30eacd0c94151960dade43aa39618 |
| institution | Directory Open Access Journal |
| issn | 2521-327X |
| language | English |
| last_indexed | 2024-03-12T12:30:08Z |
| publishDate | 2023-08-01 |
| publisher | Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften |
| record_format | Article |
| series | Quantum |
| spelling | doaj.art-e1c30eacd0c94151960dade43aa396182023-08-29T14:31:27ZengVerein zur Förderung des Open Access Publizierens in den QuantenwissenschaftenQuantum2521-327X2023-08-017109510.22331/q-2023-08-29-109510.22331/q-2023-08-29-1095Refined finite-size analysis of binary-modulation continuous-variable quantum key distributionTakaya MatsuuraShinichiro YamanoYui KuramochiToshihiko SasakiMasato KoashiRecent studies showed the finite-size security of binary-modulation CV-QKD protocols against general attacks. However, they gave poor key-rate scaling against transmission distance. Here, we extend the security proof based on complementarity, which is used in the discrete-variable QKD, to the previously developed binary-modulation CV-QKD protocols with the reverse reconciliation under the finite-size regime and obtain large improvements in the key rates. Notably, the key rate in the asymptotic limit scales linearly against the attenuation rate, which is known to be optimal scaling but is not achieved in previous finite-size analyses. This refined security approach may offer full-fledged security proofs for other discrete-modulation CV-QKD protocols.https://quantum-journal.org/papers/q-2023-08-29-1095/pdf/ |
| spellingShingle | Takaya Matsuura Shinichiro Yamano Yui Kuramochi Toshihiko Sasaki Masato Koashi Refined finite-size analysis of binary-modulation continuous-variable quantum key distribution Quantum |
| title | Refined finite-size analysis of binary-modulation continuous-variable quantum key distribution |
| title_full | Refined finite-size analysis of binary-modulation continuous-variable quantum key distribution |
| title_fullStr | Refined finite-size analysis of binary-modulation continuous-variable quantum key distribution |
| title_full_unstemmed | Refined finite-size analysis of binary-modulation continuous-variable quantum key distribution |
| title_short | Refined finite-size analysis of binary-modulation continuous-variable quantum key distribution |
| title_sort | refined finite size analysis of binary modulation continuous variable quantum key distribution |
| url | https://quantum-journal.org/papers/q-2023-08-29-1095/pdf/ |
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