Security of quantum key distribution with imperfect phase randomisation
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2022
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866910288709681152 |
|---|---|
| author | Currás-Lorenzo, Guillermo Nahar, Shlok Lütkenhaus, Norbert Tamaki, Kiyoshi Curty, Marcos |
| author_facet | Currás-Lorenzo, Guillermo Nahar, Shlok Lütkenhaus, Norbert Tamaki, Kiyoshi Curty, Marcos |
| contents | The performance of quantum key distribution (QKD) is severely limited by multiphoton emissions, due to the photon-number-splitting attack. The most efficient solution, the decoy-state method, requires that the phases of all transmitted pulses are independent and uniformly random. In practice, however, these phases are often correlated, especially in high-speed systems, which opens a security loophole. Here, we address this pressing problem by providing a security proof for decoy-state QKD with correlated phases that offers key rates close to the ideal scenario. Our work paves the way towards high-performance secure QKD with practical laser sources, and may have applications beyond QKD. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2210_08183 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Security of quantum key distribution with imperfect phase randomisation Currás-Lorenzo, Guillermo Nahar, Shlok Lütkenhaus, Norbert Tamaki, Kiyoshi Curty, Marcos Quantum Physics The performance of quantum key distribution (QKD) is severely limited by multiphoton emissions, due to the photon-number-splitting attack. The most efficient solution, the decoy-state method, requires that the phases of all transmitted pulses are independent and uniformly random. In practice, however, these phases are often correlated, especially in high-speed systems, which opens a security loophole. Here, we address this pressing problem by providing a security proof for decoy-state QKD with correlated phases that offers key rates close to the ideal scenario. Our work paves the way towards high-performance secure QKD with practical laser sources, and may have applications beyond QKD. |
| title | Security of quantum key distribution with imperfect phase randomisation |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2210.08183 |