Quantum key distribution system and method

By employing a dynamic consensus sampling protocol, a zero-trust relay network, and adaptive security monitoring, combined with phase-locked quantum state preparation and wavefront sharding techniques, the resource-intensive attacks, trust dependencies, and static protocol limitations of existing quantum key distribution systems are addressed, achieving efficient and secure long-distance quantum key distribution.

CN121619093APending Publication Date: 2026-03-06CHIZHOU JIAYIN MOTOR & CONTROL SYSTEM CO LTD
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Patent Information

Application Number
CN202511818385.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-04
Publication Date
2026-03-06

AI Technical Summary

Technical Problem

Existing quantum key distribution systems are insufficient in their defense against resource-intensive attacks, have strong reliance on relay trust, poor adaptability of static protocols, low detection sensitivity, and difficulty in achieving early threat warning, thus failing to meet the security requirements of long-distance quantum communication.

Method used

An infrared-visible image fusion method based on a channel-location collaborative cross-attention mechanism is adopted. By combining a dynamic consensus sampling protocol, a zero-trust relay network, and adaptive security monitoring with phase-locked quantum state preparation, quantum state measurement, consensus degree calculation, and wavefront sharding technology, the security and flexibility of quantum key distribution are achieved.

Benefits of technology

It improves the system's resource utilization efficiency, reduces detection latency and resource waste, achieves 99.995% system availability, has early attack detection capabilities and adaptive security policy adjustments, and meets the security requirements of long-distance quantum communication.

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Abstract

The invention discloses a quantum key distribution system and method. According to the system, a phase coherence monitoring mechanism is innovatively introduced, and early attack detection is realized through a dynamic consensus sampling protocol; a zero-trust relay network is constructed by adopting a wavefront fragmentation principle, and trust dependence on relay nodes is eliminated; self-adaptive safety monitoring is realized based on a finite state automaton, and a system safety strategy is dynamically adjusted. According to the method, the problems of resource consumption type attack, relay trust dependence, static protocol limitation and the like faced by an existing QKD system are solved through a strict mathematical framework, and long-distance quantum key distribution with efficient resources, endogenous security and elasticity and physical layer security guarantee is realized. Experiments show that compared with a traditional scheme, the detection delay of the system is reduced by about 38%, the resource waste is reduced by about 40%, and the availability of the system reaches 99.995% or above.
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