Related papers: Towards Global Quantum Key Distribution

Towards Global Quantum Key Distribution

URL: http://arxiv.org/abs/2511.10982v1
Date: Fri, 14 Nov 2025 06:04:48 GMT
Title: Towards Global Quantum Key Distribution
Authors: Haoran Zhang, Haotao Zhu, Ruihua He, Yan Zhang, Chao Ding, Lajos Hanzo, Weibo Gao,
Abstract summary: Quantum Key Distribution (QKD) supports the negotiation and sharing of private keys with unconditional security between authorized parties.<n>As QKD expands its reach globally, it encounters challenges such as performance limitations, cost, and practical security concerns.<n>In this review, we provide an overview of QKD implementations, with a focus on protocols, devices, and quantum channels.
Score: 47.07173095566302
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Quantum Key Distribution (QKD) supports the negotiation and sharing of private keys with unconditional security between authorized parties. Over the years, theoretical advances and experimental demonstrations have successfully transitioned QKD from laboratory research to commercial applications. As QKD expands its reach globally, it encounters challenges such as performance limitations, cost, and practical security concerns. Nonetheless, innovations in satellite-based QKD and the development of new protocols are paving the way towards a worldwide network. In this review, we provide an overview of QKD implementations, with a focus on protocols, devices, and quantum channels. We discuss the challenges of practical QKD and explore long-haul QKD. Additionally, we highlight the future research directions that are expected to significantly advance the realization of a global QKD network.

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