Quantum key distribution with setting-choice-independently correlated light sources
| Autor: | Kiyoshi Tamaki, Marcos Curty, Hoi-Kwong Lo, Koji Azuma, Akihiro Mizutani, Nobuyuki Imoto, Takashi Yamamoto, Rikizo Ikuta, Go Kato |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Computer Networks and Communications
Computer science 3311.04 Dispositivos Electroópticos FOS: Physical sciences Quantum channel Quantum key distribution Computer security computer.software_genre Mathematical proof 01 natural sciences lcsh:QA75.5-76.95 010305 fluids & plasmas 0103 physical sciences Computer Science (miscellaneous) 010306 general physics Quantum information science Quantum Protocol (object-oriented programming) Computer Science::Cryptography and Security Quantum Physics Principal (computer security) Statistical and Nonlinear Physics Information-theoretic security lcsh:QC1-999 Computational Theory and Mathematics 2210.23 Teoría Cuántica 3325 Tecnología de las Telecomunicaciones lcsh:Electronic computers. Computer science Quantum Physics (quant-ph) computer lcsh:Physics |
| Zdroj: | npj Quantum Information, Vol 5, Iss 1, Pp 1-8 (2019) |
| Popis: | Despite the enormous theoretical and experimental progress made so far in quantum key distribution (QKD), the security of most existing QKD implementations is not rigorously established yet. A critical obstacle is that almost all existing security proofs make ideal assumptions on the QKD devices. Problematically, such assumptions are hard to satisfy in the experiments, and therefore it is not obvious how to apply such security proofs to practical QKD systems. Fortunately, any imperfections and security-loopholes in the measurement devices can be perfectly closed by measurement-device-independent QKD (MDI-QKD), and thus we only need to consider how to secure the source devices. Among imperfections in the source devices, correlations between the sending pulses are one of the principal problems. In this paper, we consider a setting-choice-independent correlation (SCIC) framework in which the sending pulses can present arbitrary correlations but they are independent of the previous setting choices such as the bit, the basis and the intensity settings. Within the framework of SCIC, we consider the dominant fluctuations of the sending states, such as the relative phases and the intensities, and provide a self-contained information theoretic security proof for the loss-tolerant QKD protocol in the finite-key regime. We demonstrate the feasibility of secure quantum communication within a reasonable number of pulses sent, and thus we are convinced that our work constitutes a crucial step toward guaranteeing implementation security of QKD. Comment: 27 pages, 5 figures |
| Databáze: | OpenAIRE |
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