Large scale quantum key distribution: challenges and solutions
arXiv:1809.02291 · doi:10.1364/OE.26.024260
Abstract
Quantum key distribution (QKD) together with one time pad encoding can provide information-theoretical security for communication. Currently, though QKD has been widely deployed in many metropolitan fiber networks, its implementation in a large scale remains experimentally challenging. This letter provides a brief review on the experimental efforts towards the goal of global QKD, including the security of practical QKD with imperfect devices, QKD metropolitan and backbone networks over optical fiber and satellite-based QKD over free space.
14 pages, 5 figures. An invited review article for Optics Express's 20th Anniversary celebration
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