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- W4323322871 abstract "Quantum key distribution (QKD) facilitates the distribution of information-theoretic secure encryption keys by utilizing the fundamental laws of physics. However, the security of QKD systems in practice can be undermined due to implementation flaws, also known as side channels. Measurement-device-independent (MDI) QKD offers a solution to these type of attacks by eliminating the vulnerability of the detector. Among different flavors of MDI-QKD, continuous variable (CV) MDI-QKD based on coherent states is a promising candidate for integration into existing telecom infrastructure. Despite previous demonstrations of the concept and the potential for secure communication offered by CV MDI-QKD, a practical implementation of the system for real-world data encryption has yet to be achieved. Here, we introduce a simple and practical CV MDI-QKD system design that can coexist with classical telecommunications channels. This is achieved through the use of a new relay structure, a real-time frequency and phase locking system and a well-designed digital signal-processing pipeline. Our design demonstrates the first practical CV MDI-QKD system, operating at a symbol rate of 20 MBaud and generating keys that are secure against collective attacks in both the finite-size and asymptotic regimes. This sets an important milestone towards in-field implementation and integration of high-performance CV MDI-QKD into telecom networks." @default.
- W4323322871 created "2023-03-07" @default.
- W4323322871 creator A5027418498 @default.
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- W4323322871 date "2023-03-02" @default.
- W4323322871 modified "2023-09-29" @default.
- W4323322871 title "Real-world data encryption with continuous-variable measurement device-independent quantum key distribution" @default.
- W4323322871 doi "https://doi.org/10.48550/arxiv.2303.01611" @default.
- W4323322871 hasPublicationYear "2023" @default.
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