CN110996059A - Data transmission method and system - Google Patents
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- CN110996059A CN110996059A CN201911261884.5A CN201911261884A CN110996059A CN 110996059 A CN110996059 A CN 110996059A CN 201911261884 A CN201911261884 A CN 201911261884A CN 110996059 A CN110996059 A CN 110996059A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/478—Supplemental services, e.g. displaying phone caller identification, shopping application
Abstract
The present disclosure relates to the field of data transmission technologies, and in particular, to a data transmission method and system. Through setting up first data isolating device and second data isolating device, can avoid intranet platform and extranet platform to establish physical connection on the basis of guaranteeing that intranet platform and extranet platform carry out data exchange smoothly to the security of data exchange between intranet platform and the extranet platform can be guaranteed.
Description
Technical Field
The present disclosure relates to the field of data transmission technologies, and in particular, to a data transmission method and system.
Background
In order to solve the problem of information exchange under the dual-network physical isolation, the existing dual-network physical isolation information exchange products comprise a network gate, an optical disk and the like, and the products can realize the isolation transmission of video data of a security system. However, the transmission media of these products still have physical connections, and there is a risk that the direction of information transmission is uncontrollable and easily stolen.
Disclosure of Invention
In order to improve the safety of information exchange under the physical isolation of the dual networks, the disclosure provides a data transmission method and a data transmission system.
In one aspect, an embodiment of the present disclosure provides a data transmission method, where the method includes
After an outer network terminal in an outer network platform initiates an information acquisition request for requesting information in an inner network platform to the outer network platform, the inner network platform acquires the information acquisition request through a first data isolation device and sends the information requested by the outer network terminal to the outer network platform through a second data isolation device, a sending end and a receiving end of the first data isolation device are respectively positioned in the outer network platform and the inner network platform, and a sending end and a receiving end of the second data isolation device are respectively positioned in the inner network platform and the outer network platform;
and when the external network terminal does not initiate an information acquisition request, the internal network platform sends the shared information to the external network platform through the second data isolation device.
Optionally, a transmitting end of the first data isolation device is a first display screen in the extranet platform, a receiving end of the first data isolation device is a first camera in the intranet platform, a transmitting end of the second data isolation device is a second display screen in the intranet platform, and a receiving end of the second data isolation device is a second camera in the extranet platform.
Optionally, after the first control motherboard in the extranet platform receives the information acquisition request, the first control motherboard packages the information acquisition request into a two-dimensional code, and the two-dimensional code is displayed through the first display screen.
Optionally, after receiving the information acquisition request, the first control motherboard encrypts the information acquisition request to obtain encrypted command data;
the first control mainboard packages the information acquisition request into a two-dimensional code and comprises: the first control main board packages the command data into a two-dimensional code;
the intranet platform obtains the information acquisition request through the first data isolation device and comprises: the intranet platform obtains command data through the first data isolation device; after the command data are acquired, the intranet platform decrypts the command data to obtain the information acquisition request.
Optionally, the sending, by the second data isolation device, information requested by the extranet terminal to the extranet platform includes:
and displaying the information requested by the external network terminal through the second display screen so that the second camera acquires the information requested by the external network terminal.
Optionally, the sending, by the intranet platform, the shared information to the extranet platform through the second data isolation device includes:
after the shared information is called, the shared information is displayed through the second display screen so that the second camera acquires the shared information.
In another aspect, an embodiment of the present disclosure provides a data transmission system, where the system includes:
the first data isolation device is configured to enable the intranet platform to obtain an information obtaining request through the first data isolation device after an extranet terminal in the extranet platform initiates the information obtaining request for requesting information in the intranet platform to the extranet platform, and a sending end and a receiving end of the first data isolation device are respectively positioned in the extranet platform and the intranet platform;
and the second data isolation device is configured to enable the intranet platform to send the information requested by the extranet terminal to the extranet platform through the second data isolation device, or enable the intranet platform to send the shared information to the extranet platform through the second data isolation device when the extranet terminal does not initiate an information acquisition request, and a sending end and a receiving end of the second data isolation device are respectively positioned in the intranet platform and the extranet platform.
Optionally, a transmitting end of the first data isolation device is a first display screen in the extranet platform, a receiving end of the first data isolation device is a first camera in the intranet platform, a transmitting end of the second data isolation device is a second display screen in the intranet platform, and a receiving end of the second data isolation device is a second camera in the extranet platform.
Optionally, the extranet platform includes a first control motherboard, and the first control motherboard is configured to package the information acquisition request into a two-dimensional code after receiving the information acquisition request, and the two-dimensional code is displayed through the first display screen.
Optionally, the intranet platform includes a second control main board, and the second control main board is configured to, after receiving the information acquisition request, retrieve information requested by the extranet terminal, and send the information requested by the extranet terminal to the second display screen.
The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:
through setting up first data isolating device and second data isolating device, can avoid intranet platform and extranet platform to establish physical connection on the basis of guaranteeing that intranet platform and extranet platform carry out data exchange smoothly to the security of data exchange between intranet platform and the extranet platform can be guaranteed. And the information requested by the extranet terminal can be sent to the extranet platform by the information isolation module after the intranet platform receives the information acquisition request initiated by the extranet terminal, so that the extranet platform sends the information to the extranet terminal in time, and the timeliness of data exchange between the intranet platform and the extranet platform can be ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.
Fig. 1 is a schematic diagram of a data transmission apparatus provided in an embodiment of the present disclosure;
fig. 2 is a schematic diagram of another data transmission apparatus provided in the embodiment of the present disclosure.
Detailed Description
The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The existing network information security transmission technology is mainly based on protocol isolation, such as a gatekeeper, an optical gate and the like. However, the transmission media of the gatekeeper and the optical gate still have physical connection, and the risk of uncontrollable information transmission direction and easy theft exists. Although the optical disk transmission is absolutely isolated physically, the transmission between the internal and external network drivers of the optical disk can be completed through a mechanical arm, the optical disk is manually operated by a mechanical arm simulator to automatically transfer data, the traditional manual operation is replaced by an automatic mode, but the optical disk transmission mainly depends on the optical disk medium and cannot perform real-time transmission. In order to improve the security and timeliness of information exchange under the physical isolation of the dual networks, a data transmission method or device suitable for the physical isolation condition of the dual networks is needed.
A first embodiment of the present disclosure provides a data transmission method, which is applied to an intranet platform and an extranet platform under a dual-network physical isolation condition, and is executed by a data transmission apparatus shown in fig. 1, where the method includes:
step 1101, after an extranet terminal in an extranet platform initiates an information acquisition request for requesting information in an intranet platform to the extranet platform, the intranet platform acquires the information acquisition request through a first data isolation device, and a sending end and a receiving end of the first data isolation device are respectively positioned in the extranet platform and the intranet platform;
step S1102, the intranet platform sends information requested by the extranet terminal to the extranet platform through a second data isolation device, and a sending end and a receiving end of the second data isolation device are respectively positioned in the intranet platform and the extranet platform;
step S1201, when the external network terminal does not initiate the information acquisition request, the internal network platform sends the shared information to the external network platform through the second data isolation device.
Optionally, a transmitting end of the first data isolation device is a first display screen in the extranet platform, a receiving end of the first data isolation device is a first camera in the intranet platform, a transmitting end of the second data isolation device is a second display screen in the intranet platform, and a receiving end of the second data isolation device is a second camera in the extranet platform.
Optionally, after the first control motherboard in the extranet platform receives the information acquisition request, the first control motherboard packages the information acquisition request into a two-dimensional code, and the two-dimensional code is displayed through the first display screen.
Optionally, after receiving the information acquisition request, the first control motherboard encrypts the information acquisition request to obtain encrypted command data;
the first control mainboard packages the information acquisition request into a two-dimensional code and comprises: the first control main board packages the command data into a two-dimensional code;
the intranet platform obtains the information acquisition request through the first data isolation device and comprises: the intranet platform obtains command data through the first data isolation device; after the command data are acquired, the intranet platform decrypts the command data to obtain the information acquisition request.
Optionally, the sending, by the second data isolation device, information requested by the extranet terminal to the extranet platform includes:
and displaying the information requested by the external network terminal through the second display screen so that the second camera acquires the information requested by the external network terminal.
Optionally, the sending, by the intranet platform, the shared information to the extranet platform through the second data isolation device includes:
after the shared information is called, the shared information is displayed through the second display screen so that the second camera acquires the shared information.
In this embodiment, by setting the first data isolation device and the second data isolation device, the physical connection between the intranet platform and the extranet platform is avoided on the basis of ensuring that the intranet platform and the extranet platform smoothly exchange data, so that the security of data exchange between the intranet platform and the extranet platform can be ensured. And the information requested by the external network terminal can be sent to the external network platform through the information isolation module after the internal network platform receives the information acquisition request initiated by the external network terminal, so that the external network platform sends the information to the external network terminal in time, and the timeliness of data exchange between the internal network platform and the external network platform can be ensured.
A second embodiment of the present disclosure provides a data transmission method, which is applied to an intranet platform and an extranet platform under a dual-network physical isolation condition. In this embodiment, the intranet platform refers to a system platform with a high safety factor, that is, a common person cannot randomly acquire data in the intranet platform. The extranet platform refers to a commonly used internet platform. In this embodiment, the network ports and power interfaces of the intranet platform and the extranet platform are isolated, that is, the intranet platform and the extranet platform are physically isolated from each other, and there is no physical connection. The method comprises two implementation modes. The first implementation includes step S2101 and step S2102, and the second implementation includes step S2201:
step S2101, after the extranet terminal in the extranet platform initiates an information acquisition request for requesting information in the intranet platform to the extranet platform, the intranet platform acquires the information acquisition request through a first data isolation device, and a transmitting end and a receiving end of the first data isolation device are respectively positioned in the extranet platform and the intranet platform.
After an extranet terminal (such as an extranet mobile phone client or a PC client) initiates an information acquisition request for requesting information in an intranet platform to the extranet platform, a first control motherboard in the extranet platform may receive the information acquisition request and encapsulate the information acquisition request into a two-dimensional code, and then the two-dimensional code may be displayed on a first display screen in the extranet platform, so that a first camera in the intranet platform may scan the two-dimensional code displayed on the first display screen and obtain the information request, and then a second control motherboard in the intranet platform may also obtain the information acquisition request initiated by the extranet terminal according to a scanning result of the first camera. In this implementation manner, as shown in fig. 2, the first display screen in the extranet platform and the first camera in the intranet platform constitute a first data isolation device, the first display screen is a transmitting end of the first data isolation device, and the first camera is a receiving end of the first data isolation device.
In a possible implementation manner, after the first control motherboard of the external network platform receives the information acquisition request initiated by the external network terminal, the first control motherboard may encrypt the information acquisition request to obtain encrypted command data. Then, the first control main board can encapsulate the command data into a two-dimensional code, and then display the two-dimensional code through the first display screen. After the first camera scans the two-dimensional code, a second control mainboard in the intranet platform can acquire the command data. Then, the second control motherboard can decrypt the command data and obtain a correct information acquisition request. By encrypting the information acquisition request, safe and reliable data transmission can be realized.
Step S2102, the intranet platform sends information requested by the extranet terminal to the extranet platform through the second data isolation device, and a sending end and a receiving end of the second data isolation device are respectively located in the intranet platform and the extranet platform.
After the second control motherboard in the intranet platform obtains the information obtaining request initiated by the extranet terminal, information corresponding to the information obtaining request may be called from a local NVR (Network Video Recorder), a streaming media server, a memory, or other devices. The information corresponding to the information obtaining request is the information requested by the information obtaining request. For example, if the information obtaining request requests video information, the second control motherboard may obtain corresponding video information from the local NVR.
After the second control main board acquires the information corresponding to the information acquisition request, the information corresponding to the information acquisition request can be sent to the external network platform through the second data isolation device. In this implementation manner, the second display screen in the intranet platform and the second camera in the extranet platform form a second data isolation device, the second display screen is a sending end of the second data isolation device, and the second camera is a receiving end of the second data isolation device.
After the second control main board acquires the information corresponding to the information acquisition request, the information may be sent to the second display screen, so that the second display screen displays the information. Then, the second camera can acquire the information by taking a picture displayed on the second display screen. For example, if the information acquisition request requests acquisition of video information, the second camera may acquire the video information by capturing a video screen displayed on the second display screen. Alternatively, if the information acquisition request requests acquisition of image or document type information, the second camera may acquire the image or document information by capturing an image or document displayed on the second display screen. After the second camera acquires the information corresponding to the information acquisition request, the acquired information may be sent to the first control main board, and then the first control main board sends the information to the external network terminal that initiated the information acquisition request.
Step S2201, when the extranet terminal does not initiate the information acquisition request, the intranet platform sends the shared information to the extranet platform through the second data isolation device.
The application scenario of the implementation mode is that the intranet platform can actively send the relevant information in the intranet platform to the extranet platform. In this implementation manner, the second control motherboard in the intranet platform may first retrieve information that needs to be shared with the extranet platform from a local NVR, a streaming media server, or a storage device, and then display the shared information through the second display screen, so that the second camera of the extranet platform may obtain the shared information by shooting a picture displayed on the second display screen, and send the shared information to the first control motherboard of the extranet platform. After receiving the shared information, the first control motherboard may store the shared information in a device such as an NVR, a streaming server, or a memory in the extranet platform, so that the extranet terminal can retrieve the shared information. In a possible implementation manner, after the first control main board receives the shared information, a notification message may be sent to the external network terminal to notify the external network terminal to timely retrieve the shared information.
In one possible implementation, different administrative rights may be set for administrators of the intranet platform and the extranet platform. For example, the intranet platform and the extranet platform may have various administrators such as an account administrator, a security administrator, an audit administrator, and the like. The account administrator has the authority to manage various administrators, for example, the authority of various administrators and various administrators can be created, modified and/or deleted. The security administrator has the authority to configure parameter information related to the security of the intranet platform or the extranet platform, for example, parameter information such as device IP, MAC address and/or device network parameters may be configured. The audit administrator has the authority of managing the operation log of the user and the permission log of the intranet platform or the permission log of the extranet platform. Because various administrators only take charge of the work content in the field of the administrators and the management contents of the various administrators are not crossed, the safety risk of user operation can be controlled through sub-right management.
In this embodiment, the data of outer net platform only transmits through first data isolating device, the data of intranet platform only transmits through second data isolating device, just establish information channel (start first display screen and/or second display screen promptly) when the transmission of data need be carried out, display screen and camera that include in first data isolating device and the second data isolating device get into dormant state when need not carrying out data transmission, thereby can realize the unidirectional transmission of outer net data and intranet data, realize the controllable of information transmission direction, and do not have physical connection between intranet platform and the outer net platform, consequently, can realize the safe exchange of data between intranet platform and the outer net platform under the dual-network physical isolation condition.
In addition, after receiving an information acquisition request initiated by the extranet terminal, the intranet platform can send the information requested by the extranet terminal to the extranet platform through the information isolation module, so that the extranet platform sends the information to the extranet terminal in time, and the timeliness of data exchange between the intranet platform and the extranet platform can be guaranteed.
A third embodiment of the present disclosure provides a data transmission system, which is applied to an intranet platform and an extranet platform under a dual-network physical isolation condition. In this embodiment, the intranet platform refers to a system platform with a high safety factor, that is, a common person cannot randomly acquire data in the intranet platform. The extranet platform refers to a commonly used internet platform. In this embodiment, the network ports and power interfaces of the intranet platform and the extranet platform are isolated, that is, the intranet platform and the extranet platform are physically isolated from each other, and there is no physical connection. The system comprises:
the first data isolation device is configured to enable the intranet platform to obtain an information obtaining request through the first data isolation device after an extranet terminal in the extranet platform initiates the information obtaining request for requesting information in the intranet platform to the extranet platform, and a sending end and a receiving end of the first data isolation device are respectively positioned in the extranet platform and the intranet platform;
and the second data isolation device is configured to enable the intranet platform to send the information requested by the extranet terminal to the extranet platform through the second data isolation device, or enable the intranet platform to send the shared information to the extranet platform through the second data isolation device when the extranet terminal does not initiate an information acquisition request, and a sending end and a receiving end of the second data isolation device are respectively positioned in the intranet platform and the extranet platform.
Optionally, a transmitting end of the first data isolation device is a first display screen in the extranet platform, a receiving end of the first data isolation device is a first camera in the intranet platform, a transmitting end of the second data isolation device is a second display screen in the intranet platform, and a receiving end of the second data isolation device is a second camera in the extranet platform.
Optionally, the extranet platform includes a first control motherboard, and the first control motherboard is configured to package the information acquisition request into a two-dimensional code after receiving the information acquisition request, and the two-dimensional code is displayed through the first display screen.
Optionally, the intranet platform includes a second control main board, and the second control main board is configured to, after receiving the information acquisition request, retrieve information requested by the extranet terminal, and send the information requested by the extranet terminal to the second display screen.
In this embodiment, by setting the first data isolation device and the second data isolation device, the physical connection between the intranet platform and the extranet platform is avoided on the basis of ensuring that the intranet platform and the extranet platform smoothly exchange data, so that the security of data exchange between the intranet platform and the extranet platform can be ensured. And the information requested by the external network terminal can be sent to the external network platform through the information isolation module after the internal network platform receives the information acquisition request initiated by the external network terminal, so that the external network platform sends the information to the external network terminal in time, and the timeliness of data exchange between the internal network platform and the external network platform can be ensured.
The data transmission system and the data transmission method provided by the above embodiments belong to the same concept, and specific implementation processes thereof are described in the method embodiments in detail and are not described herein again.
In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.
Claims (10)
1. A method of data transmission, the method comprising:
after an extranet terminal in an extranet platform initiates an information acquisition request for requesting information in an intranet platform to the extranet platform, the intranet platform acquires the information acquisition request through a first data isolation device and sends the information requested by the extranet terminal to the extranet platform through a second data isolation device, a sending end and a receiving end of the first data isolation device are respectively positioned in the extranet platform and the intranet platform, and a sending end and a receiving end of the second data isolation device are respectively positioned in the intranet platform and the extranet platform;
and when the external network terminal does not initiate the information acquisition request, the internal network platform sends shared information to the external network platform through the second data isolation device.
2. The transmission method according to claim 1, wherein a transmitting end of the first data isolation device is a first display screen in the extranet platform, a receiving end of the first data isolation device is a first camera in the intranet platform, a transmitting end of the second data isolation device is a second display screen in the intranet platform, and a receiving end of the second data isolation device is a second camera in the extranet platform.
3. The transmission method of claim 2, wherein the method comprises:
after a first control main board in the external network platform receives the information acquisition request, the first control main board packages the information acquisition request into a two-dimensional code, and the two-dimensional code is displayed through the first display screen.
4. The transmission method of claim 3, wherein the method comprises:
after receiving the information acquisition request, the first control main board encrypts the information acquisition request to obtain encrypted command data;
the first control main board packaging the information acquisition request into a two-dimensional code comprises: the first control main board packages the command data into the two-dimensional code;
the intranet platform acquiring the information acquisition request through the first data isolation device comprises the following steps:
the intranet platform acquires the command data through the first data isolation device; after the command data are acquired, the intranet platform decrypts the command data to obtain the information acquisition request.
5. The transmission method according to claim 2, wherein said sending information requested by said extranet terminal to said extranet platform through said second data isolation device comprises:
and displaying the information requested by the external network terminal through the second display screen so that the second camera acquires the information requested by the external network terminal.
6. The transmission method according to claim 2, wherein the intranet platform sends the shared information to the extranet platform through the second data isolation device, and the method includes:
after the shared information is called, the shared information is displayed through the second display screen, so that the second camera acquires the shared information.
7. A data transmission system, the system comprising:
the system comprises a first data isolation device, a second data isolation device and a data processing device, wherein the first data isolation device is configured to enable an intranet platform to obtain an information acquisition request through the first data isolation device after an extranet terminal in an extranet platform initiates the information acquisition request for requesting information in the intranet platform to the extranet platform, and a sending end and a receiving end of the first data isolation device are respectively positioned in the extranet platform and the intranet platform;
and the second data isolation device is configured to enable the intranet platform to send the information requested by the extranet terminal to the extranet platform through the second data isolation device, or enable the intranet platform to send shared information to the extranet platform through the second data isolation device when the extranet terminal does not initiate the information acquisition request, and a sending end and a receiving end of the second data isolation device are respectively located in the intranet platform and the extranet platform.
8. The system according to claim 7, wherein the transmitting end of the first data isolation device is a first display screen in the extranet platform, the receiving end of the first data isolation device is a first camera in the intranet platform, the transmitting end of the second data isolation device is a second display screen in the intranet platform, and the receiving end of the second data isolation device is a second camera in the extranet platform.
9. The system of claim 8, wherein the extranet platform comprises a first control motherboard configured to package the information retrieval request as a two-dimensional code after receiving the information retrieval request, the two-dimensional code being displayed via the first display screen.
10. The system according to claim 8, wherein the intranet platform comprises a second control main board configured to retrieve the information requested by the extranet terminal and send the information requested by the extranet terminal to the second display screen after receiving the information acquisition request.
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| CN114500111A (en) * | 2022-04-12 | 2022-05-13 | 国网浙江省电力有限公司 | Multi-platform-based automatic project audit data processing method and system |
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| CN203057193U (en) * | 2012-12-25 | 2013-07-10 | 山东中创软件工程股份有限公司 | Data processing apparatus |
| CN203219430U (en) * | 2013-04-07 | 2013-09-25 | 内蒙古华腾科技发展有限公司 | Data transmission system based on image recognition and under circumstance of network physical isolation |
| CN105554714A (en) * | 2015-04-13 | 2016-05-04 | 三峡大学 | Secret-involved internal network secure short message gateway based on two-dimensional code |
| US20170372573A1 (en) * | 2016-06-22 | 2017-12-28 | Hanwha Techwin Co., Ltd. | Surveillance system and operating method thereof |
| CN107659537A (en) * | 2016-07-25 | 2018-02-02 | 北京计算机技术及应用研究所 | The apparatus and method of the swapping data of physically-isolated network |
| CN106973064A (en) * | 2017-04-28 | 2017-07-21 | 南京佳普科技有限公司 | A kind of inside and outside network physical isolated data transmitting device |
| CN108616711A (en) * | 2018-04-03 | 2018-10-02 | 北京华纬讯电信技术有限公司 | A kind of exchange method solving information network isolation based on vision signal |
| CN110009077A (en) * | 2019-04-09 | 2019-07-12 | 浩云科技股份有限公司 | A kind of two dimensional code two-way instruction execution system under isolation network |
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