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arXiv · 0912.4132

A simple proof that Gaussian attacks are optimal among collective attacks against continuous-variable quantum key distribution with a Gaussian modulation

Anthony Leverrier·Philippe Grangier
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Abstract

In this paper, we give a simple proof of the fact that the optimal collective attacks against continous-variable quantum key distribution with a Gaussian modulation are Gaussian attacks. Our proof makes use of symmetry properties of the quantum key distribution protocol in phase-space.

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Anthony Leverrier, Philippe Grangier. 2010-05-20. A simple proof that Gaussian attacks are optimal among collective attacks against continuous-variable quantum key distribution with a Gaussian modulation. https://doi.org/10.1103/physreva.81.062314

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