Improving parameter estimation of entropic uncertainty relation in continuous-variable quantum key distribution
arXiv:1907.02207 · doi:10.3390/e21070652
Abstract
The entropic uncertainty relation (EUR) is of significant importance in the security proof of continuous-variable quantum key distribution under coherent attacks. The parameter estimation in the EUR method contains the estimation of the covariance matrix (CM), as well as the max-entropy. The discussions in previous works have not involved the effect of finite-size on estimating the CM, which will further affect the estimation of leakage information. In this work, we address this issue by adapting the parameter estimation technique to the EUR analysis method under composable security frameworks. We also use the double-data modulation method to improve the parameter estimation step, where all the states can be exploited for both parameter estimation and key generation; thus, the statistical fluctuation of estimating the max-entropy disappears. The result shows that the adapted method can effectively estimate parameters in EUR analysis. Moreover, the double-data modulation method can, to a large extent, save the key consumption, which further improves the performance in practical implementations of the EUR.
10 pages, 4 figures
References in corpus (48)
- Quantum Cryptography
- The Security of Practical Quantum Key Distribution
- Gaussian Quantum Information
- Advances in Quantum Cryptography
- Continuous variable quantum cryptography using coherent states
- Quantum key distribution using gaussian-modulated coherent states
- Experimental demonstration of long-distance continuous-variable quantum key distribution
- Entropic Uncertainty Relations and their Applications
- Continuous variable quantum cryptography
- Quantum Cryptography without Switching
- Quantum cryptography with squeezed states
- High-rate quantum cryptography in untrusted networks
- Unconditional security proof of long-distance continuous-variable quantum key distribution with discrete modulation
- Quantum Distribution of Gaussian Keys with Squeezed States
- Composable security proof for continuous-variable quantum key distribution with coherent states
- Continuous Variable Quantum Cryptography - beating the 3 dB loss limit
- Post-selection technique for quantum channels with applications to quantum cryptography
- Distributing Secret Keys with Quantum Continuous Variables: Principle, Security and Implementations
- 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
- Security of continuous-variable quantum key distribution against general attacks
- Continuous-Variable Measurement-Device-Independent Quantum Key Distribution
- Virtual Entanglement and Reconciliation Protocols for Quantum Cryptography with Continuous Variables
- Continuous-variable QKD over 50km commercial fiber
- Continuous-variable quantum key distribution protocols with a non-Gaussian modulation
- Source-device-independent Ultra-fast Quantum Random Number Generation
- Composability in quantum cryptography
- Field Test of Classical Symmetric Encryption with Continuous Variable Quantum Key Distribution
- Continuous-variable measurement-device-independent quantum key distribution using squeezed states
- Continuous-variable measurement-device-independent quantum key distribution: Composable security against coherent attacks
- Long-distance continuous-variable quantum key distribution with efficient channel estimation
- Finite size analysis of measurement device independent quantum cryptography with continuous variables
- High speed error correction for continuous-variable quantum key distribution with multi-edge type LDPC code
- Squeezed-state quantum key distribution upon imperfect reconciliation
- Reverse Reconciliation Continuous Variable Quantum Key Distribution Based on the Uncertainty Principle
- 13dB Squeezed Vacuum States at 1550nm from 12mW external pump power at 775nm
- Finite-size analysis of continuous-variable measurement-device-independent quantum key distribution
- High Speed Continuous Variable Source-Independent Quantum Random Number Generation
- Two-way Gaussian quantum cryptography against coherent attacks in direct reconciliation
- General immunity and superadditivity of two-way Gaussian quantum cryptography
- 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
- Composable security of two-way continuous-variable quantum key distribution without active symmetrization
- 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
- User-defined quantum key distribution
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