A5087555227- Quantum Information and Cryptography
- Quantum Computing Algorithms and Architecture
- Quantum Mechanics and Applications
- Laser-Matter Interactions and Applications
- Quantum optics and atomic interactions
- Molecular Communication and Nanonetworks
- Complexity and Algorithms in Graphs
- Orbital Angular Momentum in Optics
- Optical Network Technologies
- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Advanced Authentication Protocols Security
- Cryptography and Data Security
- Ocular and Laser Science Research
National University of Defense Technology
2023-2025
Central South University
2019-2024
China GreatWall Technology Group (China)
2023-2024
Wuxi Taihu Hospital
2019
Xidian University
2009
University of Electronic Science and Technology of China
2009
The twin-field class quantum key distribution (TF-class QKD) has experimentally demonstrated the ability to surpass fundamental rate-distance limit without requiring a repeater, as revolutional milestone. In TF-class QKD implementation, an optical phase-locked loop (OPLL) structure is commonly employed generate reference light with correlated phase, ensuring coherence of fields between Alice and Bob. this configuration, light, typically located in untrusted station Charlie, solely provides...
Quantum Key Distribution (QKD) theoretically provides information-theoretic security based on physical laws. However, imperfections in practice lead to the possibility of quantum hacking QKD implementation, especially passive attacks that are difficult be detected. In this paper, we study experimentally and upper limit a backflash attack, as one vital attacks, fiber-based system. We demonstrate attack full equipped receiver show its feasibility limited distinguish ratio decoding. More...
Unauthorized light injection has always been a vital threat to the practical security of quantum-key-distribution (QKD) system. An optical-power limiter (OPL) based on thermo-optical defocusing effect proposed and implemented, limiting injected hacking light. As hardware countermeasure, performance OPL under various light-injection attacks will be tested clarify boundary before it is widely deployed. To investigate in quantum cryptography, we comprehensively test analyze behavior...
Continuous-variable quantum secret sharing (CVQSS) allows a legitimate user, i.e., the dealer, to share string of keys with multiple distant users. These users cannot individually recover dealer's key unless they work cooperatively. Although theoretical security proof CVQSS has been well established, its practical and implementation still face challenges. In this paper, we suggest scheme for using plug-and-play (P&P) configuration dual-phase-modulated coherent state (DPMCS). The proposed...
One of the most significant vulnerabilities in source unit quantum key distribution (QKD) is correlation between states after modulation, which shall be characterized and evaluated for its practical security performance. In this work, we propose a methodology to characterize intensity according single-photon detection results measurement without modifying configuration QKD system. contrast previous research that employs extra classical optical detector measure correlation, our method can...
Considering the ocean water’s optical attenuation is significantly larger than that of Fiber Channel, we propose an approach to enhance security underwater continuous-variable quantum key distribution (CVQKD). In particular, photon subtraction operation performed at emitter entanglement, thereby improving transmission performance CVQKD. Simulation results show can effectively improve CVQKD in terms distance. We also compare proposed protocol different water qualities, which shows advantage...
Laser-seeding attack enables an attacker to control the source output and eavesdrops on key information, compromising security of continuous-variable (CV) quantum distribution (QKD) system. In this paper, we suggest improved optical power limiter (OPL) defend against a laser-seeding CV QKD systems. The proposed OPL utilizes temperature monitor detect Eve's attacks through changes, providing effective component for improving reliability system in practical environments, which is called OPL-T...
We propose a continuous-variable quantum key distribution (CVQKD) scheme based on the atmosphere-to-seawater channel. In particular, an untrusted entanglement source (two modes of compressed vacuum state, TMSV) is deployed surface seawater, each mode TMSV sent to one two legitimate parts, respectively. this way, we can establish trans-media CVQKD link between atmosphere and underwater. Meanwhile, suitable non-Gaussian operation, namely photon subtraction, introduced enhance performance...
One of the most significant vulnerabilities in source unit quantum key distribution (QKD) is correlation between states after modulation, which shall be characterized and evaluated for its practical security performance. In this work, we propose a methodology to characterize intensity according single-photon detection results measurement without modifying configuration QKD system. contrast previous research that employs extra classical optical detector measure correlation, our method can...
The twin-field class quantum key distribution (TF-class QKD) has experimentally demonstrated the ability to surpass fundamental rate-distance limit without requiring a repeater, as revolutional milestone. In TF-class QKD implementation, an optical phase-locked loop (OPLL) structure is commonly employed generate reference light with correlated phase, ensuring coherence of fields between Alice and Bob. this configuration, light, typically located in untrusted station Charlie, solely provides...
We propose a new method to effectively improve the performance of quantum key distribution with eight-state continuous variables by photon subtraction method. This operation is effective in increasing and distilling Gaussian entanglement between states, can be easily realized existing technology. Simulation results show that channel-loss tolerance variable (CVQKD) protocol extended appropriate algorithm; namely, single-photon subtraction.
Unauthorized light injection has always been a vital threat to the practical security of quantum key distribution (QKD) system. An optical power limiter (OPL) based on thermo-optical defocusing effect proposed and implemented, limiting injected hacking light. As hardware countermeasure, performance OPL under various light-injection attacks shall be tested clarify boundary before being widely deployed. To investigate OPL's in cryptography, we comprehensively test analyse behavior...
First we revisit three (BGLS, MBGLS and GZZ) verifiably encrypted signature schemes. We find that they are all not strong unforgeable. remark the notion of existential unforgeable is sufficient for fair exchange protocols in most circumstances. So propose new (NBGLS, NGZZ) schemes which Also reconsider other two (ZSS CA) both cannot resist replacing public key attack. strongly suggest be a better than checking adjudicator knowing its private necessary step secure scheme.
The trans-media transmission of quantum pulse is one means free-space which can be applied in continuous-variable key distribution (CVQKD) system. In traditional implementations for atmospheric channels, the 1500-to-1600-nm regarded as an ideal carrier. However, underwater this pulses tends to suffer from severe attenuation, inevitably deteriorates security whole CVQKD paper, we propose alternative scheme over satellite-to-submarine channels. We estimate parameters involving atmosphere, sea...