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No-feedback one-way data transmission method based on single fiber structure

A data transmission method and data transmission technology, applied in the field of non-feedback one-way data transmission, can solve problems such as major safety hazards, and achieve the effect of ensuring reliable transmission

Active Publication Date: 2010-08-11
INST OF NAT SECURITY SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Strictly speaking, this structure is still a big security risk when it is applied in a system that requires strict one-way transmission.
Due to the existence of the command channel, once hackers or malicious users break through the system security protection, there is a possibility of using the command channel to send data in reverse

Method used

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  • No-feedback one-way data transmission method based on single fiber structure
  • No-feedback one-way data transmission method based on single fiber structure
  • No-feedback one-way data transmission method based on single fiber structure

Examples

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Embodiment Construction

[0056] Further describe the present invention below in conjunction with accompanying drawing and embodiment:

[0057] A kind of one-way transmission framework applying this technical solution is as attached figure 1 As shown, the entire transmission system consists of two unidirectional optical fiber data transmission cards, sending end equipment, receiving end equipment, etc. The sending end and receiving end can be various embedded devices, hosts, small servers, etc. that support the connection with the one-way optical fiber data transmission card, without any requirements for the CPU architecture.

[0058] The one-way optical fiber data transmission card is connected with the sending device or the receiving device through the computer bus, and the bus type can be PCI, PCI-E or PCI-X, etc. The transmission card can be an independent interface card or integrated on the motherboard of other devices, and is used to convert the digital signal transmitted to the card on the bus ...

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Abstract

The invention discloses a no-feedback one-way data transmission method based on a single fiber structure; equipment comprises two one-way fiber data transmission cards which belong to a transmitting end and a receiving end respectively, and the two one-way fiber data transmission cards are connected by a single fiber through a fiber receiver, data communication between the transmitting end and the receiving end adopts a proprietary protocol to carry out data encapsulation, and the reliability of the one-way data transmission is ensued by correcting and deleting codes; as the connection between the transmitting end and the receiving end does not adopt an Ethernet protocol, a data packet is not treated by a TCP / IP protocol stack, so as to eliminate the possibility that a malicious user or a hacker uses the data packet sniffing tool to detect the proprietary protocol format and greatly enhance the transmission safety.

Description

field of invention [0001] The invention relates to a one-way data transmission method without feedback, in particular to a one-way data transmission method based on a single optical fiber structure to realize data between different devices or different modules inside the device, and belongs to the technical field of information security. Background technique [0002] In the field of information security, it is sometimes required that data can only be transmitted in a directional manner. For example, data can only be sent from a low-secret network to a high-secret network, and data is not allowed to be sent from a high-secret network to a low-secret network, so as to avoid leakage. Since in a one-way transmission system without feedback, the data sender cannot confirm whether the data is damaged during transmission, in order to ensure data integrity, the following two methods are often used in one-way data transmission: [0003] 1. Add some verification information to the tra...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L9/00
Inventor 杜虹孙德刚史林港杜华王海洋
Owner INST OF NAT SECURITY SCI & TECH
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