Continuous-variable measurement-device-independent quantum key distribution using squeezed states
arXiv:1406.0973 · doi:10.1103/PhysRevA.90.052325
Abstract
A continuous-variable measurement-device-independent quantum key distribution (CV-MDI QKD) protocol using squeezed states is proposed where the two legitimate partners send Gaussian-modulated squeezed states to an untrusted third party to realize the measurement. Security analysis shows that the protocol can not only defend all detector side channels, but also attain higher secret key rates than the coherent-state-based protocol. We also present a method to improve the squeezed-state CV-MDI QKD protocol by adding proper Gaussian noise to the reconciliation side. It is found that there is an optimal added noise to optimize the performance of the protocol in terms of both key rates and maximal transmission distances. The resulting protocol shows the potential of long-distance secure communication using the CV-MDI QKD protocol.
7 pages and 9 figures. Comments are welcome
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Cited by in corpus (4)
- Finite-size analysis of continuous-variable measurement-device-independent quantum key distribution
- Noiseless Linear Amplifiers in Entanglement-Based Continuous-Variable Quantum Key Distribution
- Efficient entanglement distillation without quantum memory
- Numerical simulation of the optimal two-mode attacks for two-way continuous-variable quantum cryptography in reverse reconciliation