Experimental implementation of non-Gaussian attacks on a continuous-variable quantum key distribution system

Abstract

An intercept-resend attack on a continuous-variable quantum-key-distribution protocol is investigated experimentally. By varying the interception fraction, one can implement a family of attacks where the eavesdropper totally controls the channel parameters. In general, such attacks add excess noise in the channel, and may also result in non-Gaussian output distributions. We implement and characterize the measurements needed to detect these attacks, and evaluate experimentally the information rates available to the legitimate users and the eavesdropper. The results are consistent with the optimality of Gaussian attacks resulting from the security proofs.

4 pages, 5 figures

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• Field Test of Classical Symmetric Encryption with Continuous Variable Quantum Key Distribution
• Homodyne-detector-blinding attack in continuous-variable quantum key distribution
• Quantum Hacking on Quantum Key Distribution using Homodyne Detection
• Partially random phase attack to the practical two-way quantum-key-distribution system
• Polarization attack on continuous-variable quantum key distribution
• Security analysis of practical continuous-variable quantum key distribution systems under laser seeding attack
• Optimal eavesdropping on QKD without quantum memory