High-speed key distribution device based on semiconductor laser chaos synchronization

Abstract

The invention provides a high-speed key distribution device based on semiconductor laser chaos synchronization. The high-speed key distribution device based on semiconductor laser chaos synchronization comprises a central control module and a user module; the central control module adjusts the feedback intensity and the polarization state of feedback light; chaotic signals can be output in two linear polarization modes of a driving laser; the user module respectively injects the chaotic signals generated by the driving laser into two response lasers; the two response lasers are each subjectedto polarization adjustable light feedback; the polarization state of the feedback light can be realized through an adjustable polarization controller controlled by two random bit sequences generated by a random bit generator; when the polarization states of the feedback light corresponding to the two response lasers are same, the two lasers can obtain the chaotic signals having better synchronization performance; and, after two chaotic signals output by the two response lasers are respectively sampled and filtered through two analog-digital converts (ADC) and two bit filters, a shared key canbe obtained.

Description

technical field [0001] The invention relates to the technical field of information processing, in particular to a high-speed key distribution device based on chaotic synchronization of semiconductor lasers. Background technique [0002] Information security involves many fields such as national politics, economy, and national defense, and is a key issue in maintaining national security and social stability. As one of the key technologies of information security, information encryption has received extensive attention. Among them, the key distribution technology in the information encryption process can provide shared keys for legitimate users, so as to realize the secure communication of information. [0003] Generally, key distribution includes algorithm-based key distribution and physical security key distribution. The former mainly relies on cryptographic algorithms and ensures the security of key distribution based on the assumption that eavesdroppers have limited comp...

AI Technical Summary

Problems solved by technology

However, the current related research programs are still relatively lacking, and all of them use 1-bit information to control the parameters of the system, which greatly limits the rate of key generation

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