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Secret key distribution system based on DFB laser injection optical power keying

A technology of DFB laser and key distribution system, which is applied in the direction of optical transmission system, transmission system, digital transmission system, etc., can solve the problems of low key distribution rate and poor security, so as to improve the key distribution rate and solve the problem of poor security , the effect of increasing complexity

Active Publication Date: 2021-04-13
TAIYUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention overcomes the deficiencies in the prior art and provides a key distribution system based on DFB laser injection optical power keying to solve the problems of low key distribution rate and poor security in the prior art. Improvements and security improvements provide a new key distribution scheme

Method used

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  • Secret key distribution system based on DFB laser injection optical power keying
  • Secret key distribution system based on DFB laser injection optical power keying
  • Secret key distribution system based on DFB laser injection optical power keying

Examples

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Embodiment 1

[0036]Such asfigure 1 As shown, the embodiment of the present invention provides a key distribution system based on a DFB laser injecting optical power key, including a broadband noise light source 1, a first isolator 2, an adjustable harmonic filter 3, erbium-doped fiber amplifier 4 and The first coupler 5, the first polarization controller 6a, the second polarization controller 6b, the second isolator 7a, the third isolator 7b, the first attenuator 8a, the second attenuator 8b, the second coupler 9a, The third coupler 9b, the first DFB laser 10a, the second DFB laser 10b, the third polarization controller 12a, the fourth isolator 11a, the fourth polarization controller 12b, the fifth isolator 11b, the first power adjustable laser Module 13A, the second power adjustable laser module 13b, the first photodetector 14a, the second photodetector 14b, the first analog to digital converter 15a, the second analog to digital converter 15b, the first memory 16a, the second memory 16B, the fi...

Embodiment 2

[0055]Such asfigure 1 As shown, one of the DFB lasers is substantially identical, and the first power tunable laser module is substantially identical, and in the present embodiment, the first power tunable laser module is different from the embodiment. 13A and the second power adjustable laser module 13b are different from the embodiment, such asFigure 5As shown, it includes an exhausted laser 19, a T type biasing 23, and a random signal generator 21, and a random modulation signal output by the random signal generator 21 is input to an exhaustive laser 19 through a T-type offset device 23. The laser power of the transmitted laser 19 is output, and the random modulation signal of the output of the random signal generator 21 is also sent to the memory 16 stored by the memory channel 17.

[0056]In this embodiment, the output random high and low level signal I (for communication between communication, respectively is IAOr iB) The radio frequency port of the T type offset device 23 is loa...

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Abstract

The invention belongs to the technical field of secret communication, and discloses a secret key distribution system based on DFB laser injection optical power keying. The system comprises a broadband noise light source which is used for outputting broadband noise optical signals and injecting the broadband noise optical signals into a first DFB laser and a second DFB laser, so as to enable the first DFB laser and the second DFB laser to output synchronous chaotic laser; a first power adjustable laser module and a second power adjustable laser module which are driven by different random modulation signals to respectively output power-adjustable laser signals and inject the power-adjustable laser signals into the first DFB laser and the second DFB laser from the other side so as to modulate the optical power of the lasers. Chaotic light beams output by the first DFB laser and the second DFB laser are respectively converted to obtain random number sequences and then are respectively stored; two communication parties exchange random modulation signals for driving the first power adjustable laser module and the second power adjustable laser module through a common channel, and reserve a random number sequence stored when the random modulation driving signals are the same as a secret key for encryption storage. According to the invention, the secret key distribution rate and safety are improved.

Description

Technical field[0001]The present invention belongs to the technical field of confidential communication, and specific to the field of key distribution technology, and specifically a key distribution system based on a DFB laser injecting optical power key.Background technique[0002]With the rapid development of science and technology, people's requirements for communication security are increasingly high, absolutely safe and confidential communications are related to many aspects such as state stability and social stability. The key information is confidential communication. The "one secret" proposed by Xiangnong provides a solution for absolute security confidential communications. It is encrypted with a sufficient random key. As long as the key length is not shorter than the clear text and the key is only used once, communication is absolute safe. This requires: 1. A large number of high-speed random keys can be generated; second, it is possible to realize the security distribution ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/00H04B10/80H04B10/50
CPCH04L9/001H04B10/503H04B10/802Y04S40/20
Inventor 王云才郭亘立王安帮王龙生闫连山贾志伟
Owner TAIYUAN UNIV OF TECH
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