Optimality of Gaussian attacks in continuous-variable quantum cryptography.

By Miguel Navascués, F. Grosshans, Antonio Acín. Physical Review Letters, 2006

391 citations recorded by the source corpus.

We analyze the asymptotic security of the family of Gaussian modulated quantum key distribution protocols for continuous-variables systems. We prove that the Gaussian unitary attack is optimal for all the considered bounds on the key rate when the first and second momenta of the canonical variables involved are known by the honest parties.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/95b8831341f563b540cc7303a4fac055be3e0af4

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In Artificial Intelligence

In Atomic and Molecular Physics, and Optics

Citations in the corpus

Continuous‐Variable Quantum Key Distribution with Gaussian Modulation—The Theory of Practical Implementations (2017, background): “The second is the optimality of Gaussian attacks [41, 42, 43] which states that for a given covariance matrix, the state that minimises the key rate is Gaussian.”
Long-distance continuous-variable quantum key distribution by controlling excess noise (2016, background): “(8) for the calculation of key rate are the modulation variances VA, channel transmission T, excess noise ε, the quantum efficiency ηhom, and the electronic noise υel, which are estimated in a finite-size scenario.”
Distributing Secret Keys with Quantum Continuous Variables: Principle, Security and Implementations (2015, background): “…of Figure 1, the upper bound on Eve’s information on the corrected string can be computed for collective attacks in both the asymptotic regime [30,31], where all of the experimental parameters are assumed to be known with an inﬁnite precision, and in the ﬁnite-size regime, where the parameters…”
Advances in quantum cryptography (2019, neutral): “[377] and by Garćıa-Patrón and Cerf [378].”