The BB84 quantum key distribution using conjugate homodyne detection
arXiv:2008.04142 · doi:10.1103/PhysRevA.103.012606
Abstract
Optical homodyne detection has been widely used in continuous-variable (CV) quantum information processing for measuring field quadrature values. In this paper we explore the possibility of operating a conjugate homodyne detection system in "photon counting" mode to implement discrete-variable (DV) quantum key distribution (QKD) protocols. A conjugate homodyne detection system, which consists of a beam splitter followed by two optical homodyne detectors, can simultaneously measure a pair of conjugate quadratures X and P of the incoming quantum state. In classical electrodynamics, X^2 + P^2 is proportional to the energy (the photon number) of the input light. In quantum optics, X and P do not commute and thus the above photon-number measurement is intrinsically noisy. This suggests that a blind application of the standard security proof could result pessimistic QKD performance. We overcome this obstacle by taking advantage of two special features of the proposed detection scheme. First, the fundamental detection noise associated with vacuum fluctuation cannot be manipulated by an external adversary. Second, the ability to reconstruct the photon number statistics at the receiver's end can place additional constraints on possible attacks from the adversary. As an example, we study the security of the BB84 QKD using conjugate homodyne detection and evaluate its performance through numerical simulations. This study may open the door to a new family of QKD protocols, in complementary to the well-established DV-QKD based on single photon detection and CV-QKD based on coherent detection.
arXiv comment12 pages, 11 figures
References in corpus (33)
- Quantum Cryptography
- The Security of Practical Quantum Key Distribution
- Simple Proof of Security of the BB84 Quantum Key Distribution Protocol
- Decoy State Quantum Key Distribution
- Measurement-device-independent quantum key distribution
- Advances in Quantum Cryptography
- Satellite-to-ground quantum key distribution
- Quantum Key Distribution with High Loss: Toward Global Secure Communication
- Secure quantum key distribution with realistic devices
- Beating the PNS attack in practical quantum cryptography
- Quantum key distribution using gaussian-modulated coherent states
- Secure Quantum Key Distribution
- Security Aspects of Practical Quantum Cryptography
- Hacking commercial quantum cryptography systems by tailored bright illumination
- Practical challenges in quantum key distribution
- Secure quantum key distribution over 421 km of optical fiber
- Continuous variable quantum cryptography
- Quantum cryptography with squeezed states
- Distributing Secret Keys with Quantum Continuous Variables: Principle, Security and Implementations
- Preventing Calibration Attacks on the Local Oscillator in Continuous-Variable Quantum Key Distribution
- Local oscillator fluctuation opens a loophole for Eve in practical continuous-variable quantum-key-distribution systems
- Coexistence of continuous variable QKD with intense DWDM classical channels
- Attacking practical quantum key distribution system with wavelength dependent beam splitter and multi-wavelength sources
- Quantum Hacking on Continuous-Variable Quantum Key Distribution System using a Wavelength Attack
- Self-referenced continuous-variable quantum key distribution protocol
- Generating the local oscillator "locally" in continuous-variable quantum key distribution based on coherent detection
- Feasibility of quantum key distribution through dense wavelength division multiplexing network
- Squashing Models for Optical Measurements in Quantum Communication
- Quantum hacking: saturation attack on practical continuous-variable quantum key distribution
- Trusted Noise in Continuous-Variable Quantum Key Distribution: a Threat and a Defense
- Atmospheric continuous-variable quantum communication
- Detector decoy quantum key distribution
- Characterizing photon number statistics using conjugate optical homodyne detection
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