Teleportation-Based Continuous Variable Quantum Cryptography

Abstract

We present a continuous variable (CV) quantum key distribution (QKD) scheme based on the CV quantum teleportation of coherent states that yields a raw secret key made up of discrete variables for both Alice and Bob. This protocol preserves the efficient detection schemes of current CV technology (no single-photon detection techniques) and, at the same time, has efficient error correction and privacy amplification schemes due to the binary modulation of the key. We show that for a certain type of incoherent attack it is secure for almost any value of the transmittance of the optical line used by Alice to share entangled two-mode squeezed states with Bob (no 3 dB or 50% loss limitation characteristic of beam splitting attacks). The present CVQKD protocol works deterministically (no postselection needed) with efficient direct reconciliation techniques (no reverse reconciliation) in order to generate a secure key and beyond the 50% loss case at the incoherent attack level.

13 pages, 10 figures, two-column, RevTex4; v2: published version

References in corpus (16)

• Unconditional optimality of Gaussian attacks against continuous-variable QKD
• Quantum key distribution over 25 km with an all-fiber continuous-variable system
• Optimality of Gaussian Attacks in Continuous Variable Quantum Cryptography
• High-rate quantum cryptography in untrusted networks
• A de Finetti representation theorem for infinite dimensional quantum systems and applications to quantum cryptography
• Continuous Variable Quantum Cryptography using Two-Way Quantum Communication
• Security of continuous-variable quantum key distribution against general attacks
• Continuous-Variable Measurement-Device-Independent Quantum Key Distribution
• Continuous-variable quantum cryptography is secure against non-gaussian attacks
• Continuous-variable quantum key distribution protocols over noisy channels
• Security of Binary Modulated Continuous Variable Quantum Key Distribution under Collective Attacks
• Quantum Hacking on Quantum Key Distribution using Homodyne Detection
• Security of coherent state quantum cryptography in the presence of Gaussian noise
• Generation of continuous-wave broadband Einstein-Podolsky-Rosen beams using periodically-poled lithium niobate waveguides
• Efficient-phase-encoding protocols for continuous-variable quantum key distribution using coherent states and postselection
• Quantum Key Distribution using Continuous-variable non-Gaussian States

Cited by in corpus (4)

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• Entanglement concentration protocols for GHZ-type entangled coherent state based on linear optics