CN204481853U - A kind of isolation gap based on SDI - Google Patents
A kind of isolation gap based on SDI Download PDFInfo
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- CN204481853U CN204481853U CN201520167321.0U CN201520167321U CN204481853U CN 204481853 U CN204481853 U CN 204481853U CN 201520167321 U CN201520167321 U CN 201520167321U CN 204481853 U CN204481853 U CN 204481853U
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Abstract
The utility model provides a kind of isolation gap based on SDI, comprise interior processing unit, external processing unit and isolation safe data exchange unit, described isolation safe data exchange unit comprises and is installed in Intranet SDI output card on intranet host and Intranet SDI input card and the outer net SDI output card be installed on outer net main frame and outer net SDI input card, the output of described Intranet SDI output card is connected with the input of outer net SDI input card, and the output of described outer net SDI output card is connected with the input of Intranet SDI input card.The utility model adopts SDI interface to carry out isolation safe exchanges data, data to be exchanged is transmitted as video data, has the advantage that cost is low, bandwidth is high, time delay is short, have broad application prospects.
Description
Technical field
The utility model relates to intranet and extranet Secure isolation technical field, specifically a kind of isolation gap based on SDI.
Background technology
Along with the fast development of the Internet in recent years, network has been deep into the every aspect of all trades and professions and people's life.Network security also day by day become must faced by major issue.In various network application, the network application often run in high level of security network needs the situation of the data of accessing in lower security level network, in this process, is very easy to high level of security network occur by the possibility of rogue attacks.In order to solve such contradiction, people are isolated two networks by the equipment that isolation gap is such.
Isolation gap is that a kind of link layer cut off on circuit between network by specialized hardware connects, and the Network Security Device that the application data can carrying out safety appropriateness between network exchanges.Isolation gap is generally made up of three parts: external processing unit, interior processing unit, isolation safe data exchange unit.External processing unit and interior processing unit primary responsibility convert the network data of Inside and outside network to isolation safe data exchange unit manageable form, and are responsible for the network data data transaction obtained from isolation safe data exchange unit being become Inside and outside network.
Because isolation safe data exchange unit does not adopt common data link layer exchange of skills data, therefore people have invented various ways and have carried out exchanges data, as Chinese utility model patent CN201571080U discloses a kind of physical gateway based on CD server, CD server is adopted to carry out exchanges data; Chinese utility model patent CN202385106U discloses a kind of unidirection insulation network brake, adopts optical networking card to carry out exchanges data; In addition, the forms such as serial ports, parallel port, 1394 interfaces, USB interface are adopted to carry out exchanges data in addition.What these modes had realizes high cost, and some fail safes are disputable, and some transmission rates are not high, and some real-times are poor, does not therefore also have a kind of generally acknowledged best solution.Due in different application demands, the main factor considered inconsistent (as Military Application emphasize fail safe, economy is emphasized in medium-sized and small enterprises application, video surveillance applications emphasizes real-time etc.), therefore above-mentioned various scheme has the demand of application.Can predict, along with the development of technology, also can continue to bring out new data exchange ways.
SDI interface (digital component serial line interface) is a kind of high-definition digital input and output interface of broadcast level, is used for real-time Transmission digital audio-video signal, and data bandwidth can reach more than 3Gbps.SDI interface designs for setting up digital audio/video network, and this kind of network uses Handshake Protocol unlike computer network, but uses synchronizing network technology, and therefore time delay is very low.
Utility model content
The purpose of this utility model is to provide a kind of isolation gap based on SDI, adopts SDI interface to carry out exchanges data, has the advantage that cost is low, bandwidth is high, time delay is short.
The technical solution of the utility model is:
A kind of isolation gap based on SDI, comprise interior processing unit, external processing unit and isolation safe data exchange unit, described isolation safe data exchange unit comprises and is installed in Intranet SDI output card on intranet host and Intranet SDI input card and the outer net SDI output card be installed on outer net main frame and outer net SDI input card, the output of described Intranet SDI output card is connected with the input of outer net SDI input card, and the output of described outer net SDI output card is connected with the input of Intranet SDI input card.
The described isolation gap based on SDI, described Intranet SDI output card is connected by SDI cable with outer net SDI input card, and described outer net SDI output card is connected by SDI cable with Intranet SDI input card.
The described isolation gap based on SDI, described interior processing unit comprises and is arranged at Intranet scrambled module on intranet host and Intranet deciphering decoder module, described external processing unit comprises and is arranged at outer net scrambled module on outer net main frame and outer net deciphering decoder module, the output of described Intranet scrambled module is connected with the input that outer net SDI input card and outer net decipher decoder module by Intranet SDI output card, the output of described outer net scrambled module is connected with the input that Intranet SDI input card and Intranet decipher decoder module by outer net SDI output card.
The described isolation gap based on SDI, the deciphering of described Intranet scrambled module, Intranet decoder module, outer net scrambled module and outer net deciphering decoder module all selects TF32A09 family chip.
As shown from the above technical solution, the utility model adopts SDI interface to carry out isolation safe exchanges data, data to be exchanged is transmitted as video data, has the advantage that cost is low, bandwidth is high, time delay is short, have broad application prospects.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
The utility model is further illustrated below in conjunction with accompanying drawing.
As shown in Figure 1, based on an isolation gap of SDI, comprise the external processing unit that the interior processing unit 1 that is connected with internal network 4 is connected with external network 5 and the isolation safe data exchange unit 3 carrying out exchanges data between interior processing unit 1 and external processing unit 2.Interior processing unit 1 comprises the Intranet scrambled module 11 be arranged on intranet host, Intranet deciphering decoder module 12, Intranet forwarding control module 13 and Intranet physical network card 14.External processing unit 2 comprises the outer net scrambled module 21 be arranged on outer net main frame, outer net deciphering decoder module 22, outer net forwarding control module 23 and outer net physical network card 24.Isolation safe data exchange unit 3 comprises and is installed on Intranet SDI output card 31 on intranet host and Intranet SDI input card 32 and the outer net SDI output card 33 be installed on outer net main frame and outer net SDI input card 34.The deciphering of Intranet scrambled module 11, Intranet decoder module 12, outer net scrambled module 21 and outer net deciphering decoder module 22 all selects TF32A09 family chip.
Intranet is forwarded control module 13 and is connected with internal network 4 interactive mode by Intranet physical network card 14, and the output that Intranet forwards control module 13 is connected with the input of Intranet SDI output card 31 by Intranet scrambled module 11; The output of Intranet SDI output card 31 is connected by SDI cable with the input of outer net SDI input card 34; The output of outer net SDI input card 34 is connected with the input that outer net forwards control module 23 by outer net deciphering decoder module 22, and outer net is forwarded control module 23 and is connected with external network 5 interactive mode by outer net physical network card 24; The output that outer net forwards control module 23 is connected with the input of outer net SDI output card 33 by outer net scrambled module 21; The output of outer net SDI output card 33 is connected by SDI cable with the input of Intranet SDI input card 32; The output of Intranet SDI input card 32 is connected with the input that Intranet forwards control module 13 by Intranet deciphering decoder module 12.
Operation principle of the present utility model:
Data on internal network 4 forward control module 13 through Intranet physical network card 14 and Intranet and arrive Intranet scrambled module 11, Intranet scrambled module 11 is encrypted coding to the data received, and convert the form that Intranet SDI output card 31 can identify to, then Intranet SDI output card 31 is passed to, data are outputted to outer net SDI input card 34 by SDI cable by Intranet SDI output card 31, outer net deciphering decoder module 22 receives data from outer net SDI input card 34, through formal transformation and deciphering decoding, then external network 5 is passed to by outer net forwarding control module 23 and outer net physical network card 24.
Data on external network 5 forward control module 23 through outer net physical network card 24 and outer net and arrive outer net scrambled module 21, outer net scrambled module 21 is encrypted coding to the data received, and convert the form that outer net SDI output card 33 can identify to, then outer net SDI output card 33 is passed to, data are outputted to Intranet SDI input card 32 by SDI cable by outer net SDI output card 33, Intranet deciphering decoder module 12 receives data from Intranet SDI input card 32, through formal transformation and deciphering decoding, then internal network 4 is passed to by Intranet forwarding control module 13 and Intranet physical network card 14.
The above execution mode is only be described preferred implementation of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that those of ordinary skill in the art make the technical solution of the utility model and improvement, all should fall in protection range that claims of the present utility model determine.
Claims (4)
1. the isolation gap based on SDI, comprise interior processing unit, external processing unit and isolation safe data exchange unit, it is characterized in that: described isolation safe data exchange unit comprises and is installed in Intranet SDI output card on intranet host and Intranet SDI input card and the outer net SDI output card be installed on outer net main frame and outer net SDI input card, the output of described Intranet SDI output card is connected with the input of outer net SDI input card, and the output of described outer net SDI output card is connected with the input of Intranet SDI input card.
2. the isolation gap based on SDI according to claim 1, is characterized in that: described Intranet SDI output card is connected by SDI cable with outer net SDI input card, and described outer net SDI output card is connected by SDI cable with Intranet SDI input card.
3. the isolation gap based on SDI according to claim 1, it is characterized in that: described interior processing unit comprises and is arranged at Intranet scrambled module on intranet host and Intranet deciphering decoder module, described external processing unit comprises and is arranged at outer net scrambled module on outer net main frame and outer net deciphering decoder module, the output of described Intranet scrambled module is connected with the input that outer net SDI input card and outer net decipher decoder module by Intranet SDI output card, the output of described outer net scrambled module is connected with the input that Intranet SDI input card and Intranet decipher decoder module by outer net SDI output card.
4. the isolation gap based on SDI according to claim 3, is characterized in that: the deciphering of described Intranet scrambled module, Intranet decoder module, outer net scrambled module and outer net deciphering decoder module all selects TF32A09 family chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520167321.0U CN204481853U (en) | 2015-03-24 | 2015-03-24 | A kind of isolation gap based on SDI |
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| CN201520167321.0U CN204481853U (en) | 2015-03-24 | 2015-03-24 | A kind of isolation gap based on SDI |
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| CN204481853U true CN204481853U (en) | 2015-07-15 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107809619A (en) * | 2017-11-15 | 2018-03-16 | 株洲华通科技有限责任公司 | A kind of method and gateway exchange system that outgoing access is realized by multimedia gateway |
| CN109474478A (en) * | 2018-12-14 | 2019-03-15 | 厦门市美亚柏科信息股份有限公司 | For monitoring the methods, devices and systems of transmission data exception |
| CN109768923A (en) * | 2018-12-26 | 2019-05-17 | 浪潮软件集团有限公司 | A kind of unidirectional gateway of security isolation and method |
-
2015
- 2015-03-24 CN CN201520167321.0U patent/CN204481853U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107809619A (en) * | 2017-11-15 | 2018-03-16 | 株洲华通科技有限责任公司 | A kind of method and gateway exchange system that outgoing access is realized by multimedia gateway |
| CN109474478A (en) * | 2018-12-14 | 2019-03-15 | 厦门市美亚柏科信息股份有限公司 | For monitoring the methods, devices and systems of transmission data exception |
| CN109768923A (en) * | 2018-12-26 | 2019-05-17 | 浪潮软件集团有限公司 | A kind of unidirectional gateway of security isolation and method |
| CN109768923B (en) * | 2018-12-26 | 2021-06-15 | 浪潮软件股份有限公司 | Safety isolation one-way network gate |
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