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

A technology of key distribution and chaotic synchronization, which is applied in the field of information processing, can solve the problems of lack of keys, limit the rate of keys, etc., and achieve the effects of improving security, increasing information transmission rate, and reducing costs

Active Publication Date: 2019-04-23
SOUTHWEST UNIVERSITY
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  • Description
  • Claims
  • Application Information

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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

Method used

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

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Embodiment Construction

[0029] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention are clearly and completely described below. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0030] Such as figure 1 , figure 2 As shown, the present invention provides a high-speed key distribution device based on chaotic synchronization of semiconductor lasers, including: a central control module and a user module.

[0031] The central control module consists of a commercialized 1550nm VCSEL (driver laser, D-VCSEL) with optical feedback and a series of optical components. By adjusting the feedback intensity and the polarization state of the feedback light, ...

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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...

Claims

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Application Information

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IPC IPC(8): H04L9/12H04L9/00H04B10/50H04B10/532H04B10/564
CPCH04B10/5057H04B10/532H04B10/564H04L9/001H04L9/12
Inventor 邓涛王雪寒唐曦林晓东高子叶樊利吴正茂夏光琼
Owner SOUTHWEST UNIVERSITY
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