Double unidirectional isolation switching method based on optical fiber communication

A fiber optic communication, dual-unidirectional technology, applied in the direction of data exchange through path configuration, optical fiber transmission, data exchange network, etc., to achieve good security performance and improve security

Pending Publication Date: 2020-08-25
江苏深网科技有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the existing dual-unidirectional data exchange, the present invention propose

Method used

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  • Double unidirectional isolation switching method based on optical fiber communication
  • Double unidirectional isolation switching method based on optical fiber communication

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Experimental program
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Embodiment Construction

[0040] The present invention is described in further detail now in conjunction with accompanying drawing.

[0041] Firstly, a fiber-based one-way shutter is introduced. Such as figure 1 As shown, ordinary optical fiber cards cannot work with a single fiber. Under normal circumstances, the optical fiber network card must be plugged with two optical fibers at the same time, and its interface status can be UP. Two-way communication is required to confirm the connection, namely: 1. SYN=j; 2. ACK=j+1; 3. SYN+ACK=k; 4. ACK=k+1.

[0042] The one-way channel of the one-way optical gate uses single fiber + signal simulation technology, so that even if only one fiber is inserted between the fiber cards, it can be in the Linked mode, that is, the optical card can also work in the Linked state when a single fiber is connected, and the network interface can be Normal UP. At the same time, the signal simulation technology is used to support the protocol to complete operations such as rat...

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Abstract

The invention discloses a double unidirectional isolation switching method and system based on optical fiber communication. A source host and a destination host can complete forward communication of an original link and reverse communication of a reverse link through isolation equipment. The data transmission process of forward communication is a process: a source host - an original link sending agent module of the isolation equipment - an original link one-way sending unit - an original link one-way receiving unit - an original link receiving agent module of the isolation equipment - a targethost. The data transmission process of reverse communication is a process: the destination host - the original link receiving agent module of the isolation equipment - the sending agent module of thereverse link - the one-way sending unit of the reverse link - the receiving unit of the reverse link - the receiving agent module of the reverse link - the sending agent module of the original link of the isolation equipment - the source host. The system adopts a 4 + 2 architecture, the two links are unidirectional and do not interfere with each other, the safety performance is good, and the transceiving unit uses a single fiber + signal simulation technology, so even one optical fiber between optical fiber cards can be in a Linked mode.

Description

technical field [0001] The invention belongs to the technical field of digital information transmission, relates to a confidential or safe communication device, in particular to a dual-unidirectional isolation switching method based on optical fiber communication. Background technique [0002] With the development of information technology, the exchange of data between the military, economic and other key departments of various countries is becoming more and more frequent. For this reason, the network needs to be divided into different network security domains according to different confidentiality levels. In view of the different security protection and confidentiality requirements between different network security domains, network isolation switching products such as isolation gatekeepers and one-way optical gates were born. [0003] According to the confidentiality requirements of confidential information systems, high-secret network information cannot flow to low-secre...

Claims

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Application Information

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IPC IPC(8): H04B10/25H04L12/46
CPCH04L12/4633
Inventor 王传林
Owner 江苏深网科技有限公司
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