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Chaotic light secret communication system for enhancing secret key space based on photoelectric filtering feedback

A technology of filter feedback and key enhancement, which is applied in the field of chaotic optical security communication system, can solve the problems of eavesdropping and cracking of chaotic security communication, and achieve the effect of enhanced security, small correlation and large adjustable range

Pending Publication Date: 2022-03-25
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the risk of the existing chaotic security communication being eavesdropped and cracked, the present invention provides a chaotic optical security communication system based on photoelectric filter feedback to enhance the key space, so as to improve the key space of the system

Method used

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  • Chaotic light secret communication system for enhancing secret key space based on photoelectric filtering feedback
  • Chaotic light secret communication system for enhancing secret key space based on photoelectric filtering feedback
  • Chaotic light secret communication system for enhancing secret key space based on photoelectric filtering feedback

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Embodiment 1

[0036] Such as figure 1As shown, Embodiment 1 of the present invention provides a chaotic optical security communication system based on optoelectronic filter feedback enhanced key space, including: superluminescent light emitting diode 1, first light splitting element 4, first optical isolator 5a, second An optical isolator 5b, a first adjustable attenuator 6a, a second adjustable attenuator 6b, a receiver and a transmitter, the transmitter includes a first semiconductor laser 7a, a second light splitting element 8a, a first reflector 9a, The fourth light splitting element 10a, the first photodetector 11a, the first adjustable bandpass filter module 12a and the first gain adjustable amplifier 13a, the receiver includes the second semiconductor laser 7b, the third light splitting element 8b, the second Mirror 9b, fifth light splitting element 10b, second photodetector 11b, second adjustable bandpass filter module 12b, second gain adjustable amplifier 13b.

[0037] The broadba...

Embodiment 2

[0048] Such as figure 2 As shown, Embodiment 2 of the present invention provides a system for enhancing the key space of chaotic optical secure communication based on photoelectric filter feedback, and its specific structure is basically the same as Embodiment 1. The difference from Embodiment 1 is that in this embodiment, an optical filter 2 and an erbium-doped fiber amplifier 3 are also included; Incident to the first light splitting element 4 is divided into two paths; one path is injected into the first semiconductor laser 7a after passing through the first optical isolator 5a and the first adjustable attenuator 6a, and the other path passes through the second optical isolator 5b and the second The adjustable attenuator 6b is injected into the second semiconductor laser 7b.

[0049] Specifically, in this embodiment, the parameter settings of the second optical isolator 5a and the third optical isolator 5b are the same.

[0050] In addition, if image 3 As shown, in thi...

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Abstract

The invention belongs to the technical field of secret communication, and discloses a chaotic light secret communication system based on a photoelectric filtering feedback enhanced secret key space, which comprises a super radiation light emitting diode, a first light splitting element, a first optical isolator, a second optical isolator, a first adjustable attenuator, a second adjustable attenuator, a receiver and a transmitter, the transmitter comprises a first semiconductor laser, a first photoelectric detector, a first adjustable band-pass filtering module and a first gain adjustable amplifier, and the receiver comprises a second semiconductor laser, a second photoelectric detector, a second adjustable band-pass filtering module and a second gain adjustable amplifier. According to the method, the key space in the chaotic secret communication is effectively increased, the communication security is improved, and the method has relatively good popularization and application values.

Description

technical field [0001] The invention belongs to the technical field of secure communication, in particular to a chaotic optical secure communication system based on photoelectric filter feedback enhanced key space. Background technique [0002] Today, with the substantial growth of communication users and communication data, the security of communication has attracted more and more attention. To this end, it is necessary to effectively encrypt the transmitted information so that the information can be transmitted safely. [0003] Chaotic optical secure communication has the advantages of hardware encryption, compatibility with existing optical communication systems, and long-distance communication, so it is widely used in secure communication. The premise of chaotic optical security communication is to realize the chaotic synchronization between the receiver and the transmitter, which requires that the structural parameters of the receiver and the transmitter are completely...

Claims

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Application Information

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IPC IPC(8): H04L9/00H04B10/85H04B10/50H04B10/60
CPCH04L9/001H04B10/85H04B10/503H04B10/60
Inventor 郭园园王东生王安帮王云才王龙生赵彤
Owner TAIYUAN UNIV OF TECH
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