CN104394138A - Inner-outer network data analog transmission system and transmission method thereof - Google Patents
Inner-outer network data analog transmission system and transmission method thereof Download PDFInfo
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- CN104394138A CN104394138A CN201410671669.3A CN201410671669A CN104394138A CN 104394138 A CN104394138 A CN 104394138A CN 201410671669 A CN201410671669 A CN 201410671669A CN 104394138 A CN104394138 A CN 104394138A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
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- Computer Security & Cryptography (AREA)
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Abstract
An inner-outer network data analog transmission system comprises a first data collection coding-decoding device and a second data collection coding-decoding device; the first data collection coding-decoding device and the second data collection coding-decoding device are physically separated and respectively connected with two hosts in the inner network and the outer network to make the hosts transmit data; an analog connection and isolation of the first data collection coding-decoding device and the second data collection coding-decoding device is processed in a data safety exchange partition; the first data collection coding-decoding device and the second data collection coding-decoding device respectively comprise a video display module and a video collecting module; the video display modules of the two data collection coding-decoding devices are respectively connected with the video collecting module of the other data collection coding-decoding device via video cables, therefore each device is able to collect the video signal of the other device. The inner-outer network data analog transmission system and transmission method thereof have the advantages that the inner network and the outer network are digitally isolated via the analog connection, and a digital link does not exist between the outer network and the private network, thus invaders can barely further invade the inner network through such an interconnected system with the help of the outer network, thereby guaranteeing the security of the inner network.
Description
Technical field
The present invention relates to data transfer of computer security fields, especially a kind of intranet and extranet digital simulation transmission system and transmission method.
Background technology
Along with the development of the Internet and computer technology, increasing government and enterprises turn to and carry out non-support cable by computer network, and a large amount of data enter Data special web.For security consideration, a lot of private network all requires to isolate with the Internet, effectively to ensure the fail safe of data.But in default of the access of the Internet, cannot utilize the convenience that the Internet generally brings, also disclosed for needs data cannot be published in the Internet easily, making a large amount of data be trapped in private network cannot be fully utilized simultaneously.
Summary of the invention
Technical problem to be solved by this invention is, a kind of government and enterprises private network is provided to carry out intranet and extranet digital simulation transmission system and the transmission method of exchanges data with outer nets such as the Internets, while ensureing transfer of data, the outer net such as private network and the Internet is effectively isolated, ensures the fail safe of private network data.
For solving the problems of the technologies described above, the invention provides a kind of intranet and extranet digital simulation transmission system, comprise two separation physically, respectively connection intranet and extranet two main frames and make main frame carry out the first data acquisition coding/decoding apparatus and the second data acquisition coding/decoding apparatus of transfer of data; First data acquisition coding/decoding apparatus and the second data acquisition coding/decoding apparatus carry out simulation and are connected and isolation in data security exchange area; First data acquisition coding/decoding apparatus and the second data acquisition coding/decoding apparatus comprise video display module and video acquisition module respectively; Use video line the video acquisition module of the video display module of two data acquisition coding/decoding apparatus with another data acquisition coding/decoding apparatus to be connected respectively, make every platform equipment can collect the vision signal of an other equipment.
A kind of intranet and extranet digital simulation transmission method, comprises the steps: that (1) is communicated with; By data acquisition coding/decoding apparatus, transmitted in both directions is done to data and database data; Crc32 checking algorithm is adopted to data element, transmission is adopted and confirms retransmission mechanism, if the data sent are not confirmed, data are retransmitted, to ensure the accuracy of data; Adopt have hardware acceleration capability video display and acquisition module data are processed, and adopt optimize efficient programming language c carry out low level development, to ensure the real-time of data; (2) isolate; In the middle of two networks, nil network connects, and blocks the digital channel between computer, by the mode transmitting data information of simulation.
Beneficial effect of the present invention is: intranet and extranet are carried out numeral isolation by simulation connection, even if when outer net is captured by invaders such as hackers, because outer net does not have digital link to private network, invader may relend hardly and help outer net to intrude into Intranet further by this interconnected systems, ensures the fail safe of Intranet.
Accompanying drawing explanation
Fig. 1 is system architecture diagram of the present invention.
Fig. 2 is the hardware connection structure figure that simulation of the present invention connects.
Embodiment
As illustrated in fig. 1 and 2, a kind of intranet and extranet digital simulation transmission system, comprises two separation physically, respectively connection intranet and extranet two main frames and makes main frame carry out the first data acquisition coding/decoding apparatus and the second data acquisition coding/decoding apparatus of transfer of data; First data acquisition coding/decoding apparatus and the second data acquisition coding/decoding apparatus carry out simulation and are connected and isolation in data security exchange area; First data acquisition coding/decoding apparatus and the second data acquisition coding/decoding apparatus comprise video display module and video acquisition module respectively; Use video line the video acquisition module of the video display module of two data acquisition coding/decoding apparatus with another data acquisition coding/decoding apparatus to be connected respectively, make every platform equipment can collect the vision signal of an other equipment.
A kind of intranet and extranet digital simulation transmission method, comprises the steps: that (1) is communicated with; By data acquisition coding/decoding apparatus, transmitted in both directions is done to data and database data, while ensureing the accuracy of data, ensure the real-time of data as much as possible; (2) isolate; In the middle of two networks, nil network connects, and blocks the digital channel between computer, by the mode transmitting data information of simulation.
What text transmitted realizes principle: process of transmitting, plaintext text is carried out to the adjustment of frame structure, adds end to end, makes data have fixing reference format, is convenient to receive process, improves treatment effeciency.Then the calculating of crc32 check value is carried out, to ensure that data accurately and reliably.Then compress-encrypt process is carried out to the data that will transmit, while reducing data transfers, raising efficiency of transmission, improve the fail safe of data.Finally carry out visual coding to data to be sent by video adapter; Receiving course, after receiving terminal collects the video pictures after coding by video frequency collection card, coding is decoded, obtain decoded data, then to decrypt data process, and text structure is analyzed and crc32 verification errorless after, transmission is confirmed, simultaneously to obtaining text specimens preserving.
Be lossless process to the transmission and reception of text.Send data format: [ABC ' D], wherein A: identification strings, length 3 byte; B: 4-digit number, sends the length of text; C: the content of transmission, length is any, within 1024 bytes; D:crc32 check code.Reply and confirm data format: [ABC ' D], wherein A, B, D implication is the same, and C is the content of " ConfirmSTRG "+receive.
What data transmitted realizes principle: process of transmitting, to data advanced person row expressly coding, sends according to the mode that text is same the text after coding; Receiving course, carries out after decoding obtains text, carrying out phase-reversal coding, obtain initial data to text according to text mode to the picture received.
Be lossless process to the transmission and reception of data.Send data format: [ABC ' D], wherein A: identification strings, length 3 byte; B: 4-digit number, sends the length of text; C: the content of transmission, length is any, within 1024 bytes; D:crc32 check code.Reply and confirm data format: [ABC ' D], wherein A, B, D implication is the same, and C is the content of " ConfirmSTRG "+receive.Reply and confirm data format: [ABC ' D], wherein A, B, D implication is the same, and C is the content of " ConfirmSTRG "+receive.
What picture transmitted realizes principle: process of transmitting, first picture is read, obtain the information such as the width of picture and height, these information are formed text-string together with picture routing information according to structural requirement, send according to text mode, simultaneously the confirmation of wait-receiving mode end, after obtaining the confirmation of receiving terminal, picture is shown by video adapter, completes transmission; Receiving course, when receiving terminal is resolved the text received, if meet the structural requirement that picture sends, then it is resolved, after obtaining the routing information of the information such as picture height and width and picture, confirm to transmitting terminal transmission and reception, after detecting that transmitting terminal sends picture, picture is received, and preserves according to the pictorial information obtained, complete the receiving course of picture.
To the transmission and reception of picture for damaging process.Confirm pictorial information data format: [ABC ' D], wherein A: identification strings, length 3 byte; B: 4-digit number, sends the length of text; C: the picture name of " ConfirmSTRG "+receive; D:crc32 check code.Confirm the data format that picture is preserved: [ABC ' D], wherein A: identification strings, length 3 byte; B: 4-digit number, sends the length of text; C: the picture name of " ConfirmSAVE "+receive; D:crc32 check code.
Although the present invention illustrates with regard to preferred implementation and describes, only it will be understood by those of skill in the art that otherwise exceed claim limited range of the present invention, variations and modifications can be carried out to the present invention.
Claims (2)
1. an intranet and extranet digital simulation transmission system, is characterized in that, comprises two separation physically, respectively connection intranet and extranet two main frames and makes main frame carry out the first data acquisition coding/decoding apparatus and the second data acquisition coding/decoding apparatus of transfer of data; First data acquisition coding/decoding apparatus and the second data acquisition coding/decoding apparatus carry out simulation and are connected and isolation in data security exchange area; First data acquisition coding/decoding apparatus and the second data acquisition coding/decoding apparatus comprise video display module and video acquisition module respectively; Use video line the video acquisition module of the video display module of two data acquisition coding/decoding apparatus with another data acquisition coding/decoding apparatus to be connected respectively, make every platform equipment can collect the vision signal of an other equipment.
2. an intranet and extranet digital simulation transmission method, is characterized in that, comprises the steps: that (1) is communicated with; By data acquisition coding/decoding apparatus, transmitted in both directions is done to data and database data; Crc32 checking algorithm is adopted to data element, transmission is adopted and confirms retransmission mechanism, if the data sent are not confirmed, data are retransmitted, to ensure the accuracy of data; Adopt have hardware acceleration capability video display and acquisition module data are processed, and adopt optimize efficient programming language c carry out low level development, to ensure the real-time of data; (2) isolate; In the middle of two networks, nil network connects, and blocks the digital channel between computer, by the mode transmitting data information of simulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410671669.3A CN104394138A (en) | 2014-11-21 | 2014-11-21 | Inner-outer network data analog transmission system and transmission method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410671669.3A CN104394138A (en) | 2014-11-21 | 2014-11-21 | Inner-outer network data analog transmission system and transmission method thereof |
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| CN104394138A true CN104394138A (en) | 2015-03-04 |
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| CN201410671669.3A Pending CN104394138A (en) | 2014-11-21 | 2014-11-21 | Inner-outer network data analog transmission system and transmission method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106101662A (en) * | 2016-08-18 | 2016-11-09 | 青岛晟铭网络科技有限公司 | A kind of system and method utilizing bar code transmission data |
| CN106375261A (en) * | 2015-07-21 | 2017-02-01 | 杭州海康威视系统技术有限公司 | Cross-network data transmission method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201754590U (en) * | 2010-08-24 | 2011-03-02 | 中山市公安局网络警察支队 | Network data interchanging system |
| CN202077060U (en) * | 2011-01-21 | 2011-12-14 | 任峰 | Network isolation data exchanger |
| CN202362795U (en) * | 2011-07-18 | 2012-08-01 | 北京赛博兴安科技有限公司 | Data exchange system based on bar code image recognition technology |
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2014
- 2014-11-21 CN CN201410671669.3A patent/CN104394138A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201754590U (en) * | 2010-08-24 | 2011-03-02 | 中山市公安局网络警察支队 | Network data interchanging system |
| CN202077060U (en) * | 2011-01-21 | 2011-12-14 | 任峰 | Network isolation data exchanger |
| CN202362795U (en) * | 2011-07-18 | 2012-08-01 | 北京赛博兴安科技有限公司 | Data exchange system based on bar code image recognition technology |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106375261A (en) * | 2015-07-21 | 2017-02-01 | 杭州海康威视系统技术有限公司 | Cross-network data transmission method and system |
| CN106375261B (en) * | 2015-07-21 | 2020-03-17 | 杭州海康威视系统技术有限公司 | Cross-network data transmission method and system |
| CN106101662A (en) * | 2016-08-18 | 2016-11-09 | 青岛晟铭网络科技有限公司 | A kind of system and method utilizing bar code transmission data |
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Application publication date: 20150304 |