Self-adaptive differential phase-shift quantum key distribution system based on deep neural network and implementation method of system

Abstract

The invention discloses a self-adaptive differential phase-shift quantum key distribution system based on a deep neural network and an implementation method of the system. A quantum key sending end modulates a quantum signal and sends the quantum signal to a quantum key receiving end through a quantum channel; the quantum key receiving end carries out differential detection on the received signaland sends a detection result to a signal-to-noise ratio monitoring and post-processing module; the signal-to-noise ratio monitoring and post-processing module adopts a deep neural network algorithm tomonitor a signal-to-noise ratio of the received signal in real time, and adaptively selects a coding scheme to carry out error correction negotiation and privacy amplification according to the monitored signal-to-noise ratio. According to the system and the method, the signal-to-noise ratio of the system can be accurately calculated in real time through the deep neural network algorithm, a channel state is monitored, an appropriate negotiation scheme can be adaptively selected according to the monitored channel state, the self-adaptive differential phase-shift quantum key distribution is achieved, and the system resources are effectively saved.

Description

technical field [0001] The invention belongs to the technical field of optical fiber quantum communication, and relates to an adaptive differential phase shift quantum key distribution system based on a deep neural network and an implementation method thereof. Background technique [0002] Quantum key distribution enables long-distance communication parties in untrusted quantum channels to safely share keys, and its security is guaranteed by the uncertainty principle of quantum mechanics and the quantum non-cloning theorem. The differential phase-shift quantum key distribution follows the structural characteristics of the differential phase-shift modulation system, which can realize long-distance high-stability quantum key distribution, and its key efficiency is also higher than that of the three mainstream QKD protocols (ie BB84, B92, E91) is higher. Differential phase-shift quantum key distribution has high research value and practicability, and it opens up a new developm...

AI Technical Summary

Problems solved by technology

[0003] The performance of differential phase-shift quantum key distribution is affected by the key agreement algorithm. In practical applications, the channel environment is constantly changing. Using a single negotiation scheme may not be able to adapt to various channel environments, and the optimal negotiation scheme is always used will cause a lot of waste of resources

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