Device for unidirectional file transmission among different networks

A one-way transmission and inter-network technology, applied in the field of network security, to achieve high reliability, high transmission speed, and low cost of use

Inactive Publication Date: 2016-05-18
刘晓建
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] With the rapid advancement of Internet technology, people rely more and more on the Internet. They have become accustomed to using the Internet to obtain valuable information, establish connections with the world, and enjoy the entertainment provided. However, wit

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  • Device for unidirectional file transmission among different networks

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Embodiment Construction

[0012] Since the Ethernet direct connection physically only supports one-way data transmission, when implementing the method of the present invention, the sending device should adopt a protocol that can complete data transmission without the need for the receiving device to feedback "acknowledge receipt" , such as the UDP protocol.

[0013] The disadvantage of adopting the "no confirmation" data transmission protocol is: when the processing speed of the input message by the receiving device is slower than the message output speed of the sending device, some messages may be discarded by the receiving device , thus losing some one-way transmission data. There are two ways to avoid the above situation from happening. Method 1 is for the sending device to use a flow limiting algorithm such as the "leaky bucket algorithm", and method 2 is to implement a "stop and wait protocol" between the sending device and the receiving device. The two methods are described below:

[0014] Met...

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Abstract

The invention discloses a device for unidirectional file transmission among different networks. The device comprises a transmitting device and a receiving device, wherein the transmitting device is accessed to an information source network, and the receiving device is accessed to an information sink network. The device is characterized in that: the transmitting device and the receiving device are connected through a plurality of Ethernet straight-through cables which only support unidirectional data transmission physically; the transmitting device transmits a file to be transmitted to the receiving device through the Ethernet straight-through cables; and the receiving device receives and processes information transmitted through the Ethernet straight-through cables. The invention further discloses a unidirectional file transmission device which adopts a traffic limiting method to prevent data loss caused by unconfirmed transmission methods. The invention further discloses a unidirectional file transmission device which adopts special confirmation hardware for transmitting confirmation information.

Description

technical field [0001] The invention relates to a device for one-way data transmission between different networks, which belongs to the field of network security. Background technique [0002] The traditional one-way data sharing of internal and external network data is to use CD-ROM and other read-only storage media to transfer files between internal and external networks. Obviously, this file transfer method that requires manual intervention has disadvantages such as low efficiency, volatile storage media, and high cost of use. At present, there are also unidirectional data transmission systems on the market through Ethernet → unidirectional transmission bridge → optical fiber signal. Although the reliability and efficiency of transmission can be guaranteed, the deployment difficulty and equipment cost are relatively high. [0003] With the rapid advancement of Internet technology, people rely more and more on the Internet. They have become accustomed to using the Interne...

Claims

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Application Information

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IPC IPC(8): H04L29/08H04L12/825
CPCH04L67/06H04L47/26H04L67/1097
Inventor 刘晓建
Owner 刘晓建
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