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The security of practical quantum key distribution
Rev. Mod. Phys. 81, 1301 – Published 29 September, 2009
DOI: https://doi.org/10.1103/RevModPhys.81.1301
Abstract
Quantum key distribution (QKD) is the first quantum information task to reach the level of mature technology, already fit for commercialization. It aims at the creation of a secret key between authorized partners connected by a quantum channel and a classical authenticated channel. The security of the key can in principle be guaranteed without putting any restriction on an eavesdropper’s power. This article provides a concise up-to-date review of QKD, biased toward the practical side. Essential theoretical tools that have been developed to assess the security of the main experimental platforms are presented (discrete-variable, continuous-variable, and distributed-phase-reference protocols).
Article Text
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