Internal and external network isolated one-way secure data transmission structure and method

Abstract

The invention discloses an intranet and extranet isolated one-way secure data transmission structure and method. The structure comprises an intranet operation and maintenance data signal processing system, a one-way optical fiber multicast code stream transmission unit and a one-way ASI code stream transmission device. The method comprises the following steps: acquiring data of all equipment in abroadcast television broadcasting system, generating a TS file from the acquired data, and sending the TS file in a UDP multicast code stream mode or outputting the TS file in a TS code stream broadcasting and card issuing mode; transmitting the received multicast code stream in a one-way optical fiber multicast transmission mode; outputting ASI signals in a TS code stream broadcast card issuing mode, packaging the ASI signals into UDP multicast through one path, and providing the UDP multicast for an external network data receiving gateway and a database server; and directly providing the ASIsignals for television multiplexing equipment through the other path.

Description

technical field [0001] The invention relates to the technical field of one-way data transmission, in particular to a structure and method for one-way secure data transmission with internal and external isolation. Background technique [0002] The one-way data transmission technology adopts a simplex method to realize point-to-point transmission of data, such as infrared data transmission of infrared remote control, TV reception of analog TV system, and FM radio station reception. These methods are all one-way data transmission method. The data sender can only send data, but not receive data, and the data receiver can only receive data but not send data. [0003] This kind of data transmission method feels like it has returned to the era when we can only monitor and watch data, such as TV and radio, but cannot actively order programs. It seems to run counter to the current technological progress and violate the law of technological development. But everything has two sides....

AI Technical Summary

Problems solved by technology

[0027] In order to solve the above-mentioned technical problems, the object of the present invention is to provide a one-way secure data transmission structure and method for the isolation of internal and external networks. The application of data in the external network, and the external network cannot reversely access the internal network to cause the possibility of attacking the internal network; solve the problem of data format, use the transmission protocol suitable for broadcasting and television to send data files, so that the data can be transmitted in digital TV equipment Transmission; solve the problem of public network data transmission, adopt streaming media protocol, so that data can be transmitted on the public network; solve the problem of one-way data transmission, use one-way optical data transmission and ASI (TS) stream broadcast card to realize data one-way output

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