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Updated: Sep 26, 2025
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Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
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Practical Security of High-Dimensional Quantum Key Distribution with Intensity Modulator Extinction.
Yang Wang1,2,3, Ge-Hai Du2,3, Yang-Bin Xu2,3
1National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
Entropy (Basel, Switzerland)
|April 23, 2022
Summary
Realistic device imperfections impact high-dimensional quantum key distribution (HD-QKD) security. Our study shows intensity modulator flaws affect secret key rates and transmission distances in HD-QKD systems.
Area of Science:
- Quantum Information Science
- Cybersecurity
- Optics and Photonics
Background:
- Quantum key distribution (QKD) offers unconditional security.
- High-dimensional QKD (HD-QKD) enhances QKD capabilities.
- Theoretical security proofs often overlook real-world device imperfections.
Purpose of the Study:
- To investigate the practical security of HD-QKD systems.
- To analyze the impact of a realistic intensity modulator on HD-QKD security.
- To evaluate the influence of finite-key effects on HD-QKD performance.
Main Methods:
- Employing the decoy-state method for security analysis.
- Incorporating practical imperfections of an intensity modulator.
- Considering finite-key effects in the security assessment.
Main Results:
- A realistic intensity modulator significantly impacts HD-QKD practical security.
- Observed reductions in secret key rate due to device imperfections.
- Demonstrated limitations on achievable transmission distances.
Conclusions:
- Practical security analysis is crucial for real-world HD-QKD deployment.
- Device imperfections necessitate adjustments to theoretical security bounds.
- Further research needed to mitigate practical security vulnerabilities in HD-QKD.
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