Simple security proofs for continuous-variable quantum key distribution with intensity fluctuating sources
arXiv:1908.11423 · doi:10.1038/s41534-021-00482-3
Abstract
Quantum Key Distribution (QKD) in principle offers unconditional security based on the laws of physics. Continuous variable (CV) quantum key distribution has the potential for high-key-rate and low-cost implementations using standard telecom components. Despite tremendous theoretical and experimental progress in continuous-variable quantum key distribution, the security has not been rigorously established for most current continuous-variable quantum key distribution systems that have imperfections. Among the imperfections, intensity fluctuation is a significant principal problem affecting security. In this paper, we provide simple security proofs for continuous-variable quantum key distribution systems with an intensity fluctuating sources. Specifically, depending on device assumptions in the source, the imperfect systems are divided into two cases for security proofs. Our proofs are simple to implement without any hardware adjustment for the current continuous-variable quantum key distribution system. Besides, we show some compensation schemes for the decoding flaws for an outlook.
16 pages, 11 figures
References in corpus (16)
- Satellite-to-ground quantum key distribution
- Secure Quantum Key Distribution
- Overcoming the rate-distance barrier of quantum key distribution without using quantum repeaters
- Unconditional optimality of Gaussian attacks against continuous-variable QKD
- Quantum key distribution over 25 km with an all-fiber continuous-variable system
- Finite-size analysis of continuous-variable quantum key distribution
- Long-Distance Continuous-Variable Quantum Key Distribution over 202.81 km of Fiber
- A de Finetti representation theorem for infinite dimensional quantum systems and applications to quantum cryptography
- Proof-of-principle experimental demonstration of twin-field type quantum key distribution
- Quantum key distribution with an efficient countermeasure against correlated intensity fluctuations in optical pulses
- Long-distance continuous-variable quantum key distribution with efficient channel estimation
- High Bit Rate Continuous-Variable Quantum Key Distribution
- Continuous-variable quantum key distribution with Gaussian source noise
- Quantum key distribution with setting-choice-independently correlated light sources
- Secure quantum communication in the presence of phase and polarization dependent loss
- Secret key rate of a continuous-variable quantum-key-distribution scheme when the detection process is inaccessible to eavesdroppers