Continuous-variable source-device-independent quantum key distribution against general attacks

Abstract

The continuous-variable quantum key distribution with entanglement in the middle, a semi-device-independent protocol, places the source at the untrusted third party between Alice and Bob, and thus has the advantage of high levels of security with the purpose of eliminating the assumptions about the source device. However, previous works considered the collective-attack analysis, which inevitably assumes that the states of the source has an identical and independently distributed (i.i.d) structure, and limits the application of the protocol. To solve this problem, we modify the original protocol by exploiting an energy test to monitor the potential high energy attacks an adversary may use. Our analysis removes the assumptions of the light source and the modified protocol can therefore be called source-device-independent protocol. Moreover, we analyze the security of the continuous-variable source-device-independent quantum key distribution protocol with a homodyne-homodyne structure against general coherent attacks by adapting a state-independent entropic uncertainty relation. The simulation results indicate that, in the universal composable security framework, the protocol can still achieve high key rates against coherent attacks under the condition of achievable block lengths.

arXiv comment11 pages and 4 figures. Comments are welcome

References in corpus (45)

• Quantum Cryptography
• The Security of Practical Quantum Key Distribution
• Gaussian Quantum Information
• Continuous variable quantum cryptography using coherent states
• Fundamental Limits of Repeaterless Quantum Communications
• General Benchmarks for Quantum Repeaters
• Distillation of secret key and entanglement from quantum states
• The Uncertainty Principle in the Presence of Quantum Memory
• Unconditional optimality of Gaussian attacks against continuous-variable QKD
• Quantum Cryptography without Switching
• High-rate quantum cryptography in untrusted networks
• The Uncertainty Relation for Smooth Entropies
• Long-Distance Continuous-Variable Quantum Key Distribution over 202.81 km of Fiber
• Unconditional security proof of long-distance continuous-variable quantum key distribution with discrete modulation
• Composable security proof for continuous-variable quantum key distribution with coherent states
• Distributing Secret Keys with Quantum Continuous Variables: Principle, Security and Implementations
• Extremality of Gaussian quantum states
• Implementation of Continuous-Variable Quantum Key Distribution with Composable and One-Sided-Device-Independent Security Against Coherent Attacks
• Continuous Variable Quantum Cryptography using Two-Way Quantum Communication
• Security of continuous-variable quantum key distribution via a Gaussian de Finetti reduction
• Duality Between Smooth Min- and Max-Entropies
• Continuous-Variable Measurement-Device-Independent Quantum Key Distribution
• Experimental demonstration of Gaussian protocols for one-sided device-independent quantum key distribution
• Continuous-variable QKD over 50km commercial fiber
• Continuous-variable quantum key distribution protocols with a non-Gaussian modulation
• Continuous-variable quantum key distribution protocols over noisy channels
• Continuous-variable measurement-device-independent quantum key distribution using squeezed states
• Continuous-variable measurement-device-independent quantum key distribution: Composable security against coherent attacks
• Continuous-Variable Quantum Key Distribution with Entanglement in the Middle
• Reverse Reconciliation Continuous Variable Quantum Key Distribution Based on the Uncertainty Principle
• Position-Momentum Uncertainty Relations in the Presence of Quantum Memory
• Continuous-variable quantum cryptography with an untrusted relay: Detailed security analysis of the symmetric configuration
• Implementation vulnerabilities in general quantum cryptography
• Entanglement Reactivation in Separable Environments
• Min- and Max-Entropy in Infinite Dimensions
• General immunity and superadditivity of two-way Gaussian quantum cryptography
• Two-way Gaussian quantum cryptography against coherent attacks in direct reconciliation
• Composable security analysis of continuous-variable measurement-device-independent quantum key distribution with squeezed states for coherent attacks
• Improvement of two-way continuous-variable quantum key distribution using optical amplifiers
• Security of a new two-way continuous-variable quantum key distribution protocol
• Violation of Bells inequality using continuous variable measurements
• Gaussian Entanglement for Quantum Key Distribution from a Single-Mode Squeezing Source
• Improving parameter estimation of entropic uncertainty relation in continuous-variable quantum key distribution
• Maximal violation of Bell inequalities by position measurements
• Numerical simulation of the optimal two-mode attacks for two-way continuous-variable quantum cryptography in reverse reconciliation

Cited by in corpus (5)

• Continuous-variable quantum key distribution system: past, present, and future
• A modified practical homodyne detector model for continuous-variable quantum key distribution: detailed security analysis and improvement by the phase-sensitive amplifier
• Secure Quantum Pattern Communication
• Quantum Secrecy in Thermal States III
• Biphoton phase-space correlations from Gouy-phase measurements using double slits