CN113904734A - Covert channel one-way transmission system based on short-range terahertz communication - Google Patents
Covert channel one-way transmission system based on short-range terahertz communication Download PDFInfo
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- CN113904734A CN113904734A CN202111236016.9A CN202111236016A CN113904734A CN 113904734 A CN113904734 A CN 113904734A CN 202111236016 A CN202111236016 A CN 202111236016A CN 113904734 A CN113904734 A CN 113904734A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 68
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- 230000002452 interceptive effect Effects 0.000 abstract description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/90—Non-optical transmission systems, e.g. transmission systems employing non-photonic corpuscular radiation
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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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Abstract
The invention discloses a hidden channel one-way transmission system based on short-range terahertz communication, which comprises: the terahertz transmitter comprises an external terminal, a first transmission control card, a terahertz transmitter, a terahertz receiver, a second transmission control card and an internal terminal; the external terminal is connected with the first transmission control card and used for receiving information of files to be processed; the first transmission control card is connected with the terahertz transmitter and is used for coding and scrambling the information of the file to be processed to form a data packet to be transmitted; the terahertz transmitter is used for loading the data packet to be transmitted on a terahertz signal and transmitting the data packet through a terahertz hidden wireless channel. The hidden channel one-way transmission system based on short-range terahertz communication improves the efficiency of cross-network exchange of files through the establishment of the hidden channel ferry system of short-range terahertz communication, effectively ensures the safety of interactive data, can enrich the data exchange types of the existing system, and enables the data exchange to be more convenient on the premise of safety and reliability.
Description
Technical Field
The invention belongs to the field of information security, and particularly relates to a covert channel one-way transmission system based on short-range terahertz communication.
Background
In the age of high-speed development of informatization, big data applications represented by the internet have penetrated deeply into various industries, and network security risks threaten the security of various networks connected with the internet while enjoying the convenience brought by the internet. Government, military and other units construct business systems and office systems based on internal networks, and the demands for data exchange among secret-related networks of different security levels and between the secret-related networks and external networks are increasingly prominent.
At present, secret-related data cannot be connected with a public network and a public local area network, and data transfer is generally carried out through manual disk carving, however, the mode has low efficiency, poor safety, inconvenience in use and limited data types, and cannot meet the current demand scene.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a covert channel unidirectional transmission system based on short-range terahertz communication. The technical problem to be solved by the invention is realized by the following technical scheme:
a covert channel unidirectional transmission system based on short-range terahertz communication comprises:
the terahertz transmitter comprises an external terminal, a first transmission control card, a terahertz transmitter, a terahertz receiver, a second transmission control card and an internal terminal;
the external terminal is connected with the first transmission control card and used for receiving information of files to be processed;
the first transmission control card is connected with the terahertz transmitter and is used for coding and scrambling the information of the file to be processed to form a data packet to be transmitted;
the terahertz transmitter is used for loading the data packet to be transmitted onto a terahertz signal and transmitting the data packet through a terahertz hidden wireless channel;
the terahertz receiver is connected with the second transmission control card and used for receiving the terahertz signal;
the second transmission control card is connected with the internal terminal and is used for unpacking and restoring the terahertz signals into digital signals to obtain processed file information;
the internal terminal machine is used for receiving and storing the processed file information.
In one embodiment, the first transmission control card comprises an encoding module, an error correction encoding module, a scrambling module and a signal conversion module;
the coding module is connected with the error correction coding module and is used for coding the information of the file to be processed;
the error correction coding module is connected with the scrambling module and is used for carrying out forward error correction on the coded information;
the scrambling module is connected with the signal conversion module and is used for carrying out data scrambling on the information after forward error correction;
the signal conversion module is used for converting the information subjected to scrambling to form a transmission data packet which can be sent through a terahertz channel.
In one embodiment, the first transmission control card and the second transmission control card are unidirectional transmission cards.
In one embodiment, the terahertz transmitter is a zero-if transmitter of a VDI harmonic mixer.
In one embodiment, the terahertz receiver is a harmonic mixing zero intermediate frequency receiver.
The invention has the beneficial effects that:
the hidden channel one-way transmission system based on short-range terahertz communication improves the efficiency of cross-network exchange of files through the establishment of the hidden channel ferry system of short-range terahertz communication, effectively ensures the safety of interactive data, can enrich the data exchange types of the existing system, and enables the data exchange to be more convenient on the premise of safety and reliability.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a schematic diagram of a covert channel unidirectional transmission system module based on short-range terahertz communication provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of a data ferry system according to an embodiment of the present invention;
FIG. 3 is a block diagram of a control card module of a covert channel unidirectional transmission system based on short-range terahertz communication provided by an embodiment of the present invention;
FIG. 4 is a schematic diagram of a file unidirectional transmission with an auditing mechanism according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a file unidirectional transmission with a database server according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.
Example one
Referring to fig. 1, fig. 1 is a schematic diagram of a covert channel unidirectional transmission system based on short-range terahertz communication according to an embodiment of the present invention, including:
the terahertz transmitter comprises an external terminal, a first transmission control card, a terahertz transmitter, a terahertz receiver, a second transmission control card and an internal terminal;
the external terminal is connected with the first transmission control card and used for receiving information of files to be processed;
the first transmission control card is connected with the terahertz transmitter and is used for coding and scrambling the information of the file to be processed to form a data packet to be transmitted;
the terahertz transmitter is used for loading the data packet to be transmitted onto a terahertz signal and transmitting the data packet through a terahertz hidden wireless channel;
the terahertz receiver is connected with the second transmission control card and used for receiving the terahertz signal;
the second transmission control card is connected with the internal terminal and is used for unpacking and restoring the terahertz signals into digital signals to obtain processed file information;
the internal terminal machine is used for receiving and storing the processed file information. Preferably, the first transmission control card and the second transmission control card are unidirectional transmission cards, the unidirectional transmission cards respectively perform unidirectional transmission and unidirectional reception, and the unidirectional transmission cards correspondingly have information encoding and decoding functions. The first transmission control card is an external data control card, and the second transmission control card is an internal data control card.
In the embodiment, the application is shown by the following example, for example, in a data ferry system, please refer to fig. 2, data synchronization between a low-density network and a high-density network is realized by the data ferry system, and in the process, data needs to pass through three links, namely a low-density secure access domain, a unidirectional terahertz channel and a high-density transition security domain, so that data is securely transmitted from the low-density network to the high-density network.
In one embodiment, referring to fig. 3, the first transmission control card includes an encoding module, an error correction encoding module, a scrambling module, and a signal conversion module;
the coding module is connected with the error correction coding module and is used for coding the information of the file to be processed;
the error correction coding module is connected with the scrambling module and is used for carrying out forward error correction on the coded information;
the scrambling module is connected with the signal conversion module and is used for carrying out data scrambling on the information after forward error correction;
the signal conversion module is used for converting the information subjected to scrambling to form a transmission data packet which can be sent through a terahertz channel.
That is, in the information processing of the transmitting end, the pseudo-synchronous data stream and the encrypted information generated in the data control card in real time are encoded at the same time, and the signal conversion is completed by modulation.
In implementation, this embodiment may further include an auditing mechanism, for example, as shown in fig. 4. The file to be transmitted by the external network user is transmitted after the administrator finishes auditing on the external network, and the data reaches the internal network through the system of the embodiment, is audited by the administrator and is forwarded to the internal network user with the corresponding file requirement.
When the database is included, please refer to fig. 5, for example, mass data of the external database needs to be synchronized to the internal database after being examined and confirmed, the external server and the internal server need to be connected to the switch respectively to complete data migration, and data synchronous transmission is performed through the terahertz unidirectional transmission system.
In order to more clearly illustrate the scheme of the present application, a specific scenario is constructed in the present application for illustration, for example, a 310GHz terahertz wireless communication link is constructed, a radio frequency signal source generates a radio frequency signal with a frequency of 19.375GHz, the radio frequency signal is up-converted by a frequency multiplier, a modulation signal is generated by using an electrical signal mixer, and the modulation signal is amplified and then transmitted by an antenna. A zero intermediate frequency (zero-IF) transmitter of a VDI harmonic mixer is adopted at a transmitting end, and a harmonic mixing zero intermediate frequency receiver is adopted at a receiving end, so that indoor short-distance Gbps-magnitude high-speed wireless transmission can be realized.
A 310GHz wireless communication system is adopted, the output power of a transmitter is-15 dBm, a 26dBi VDI waveguide horn antenna is adopted as a transmitting antenna, the signal bandwidth is 20GHz, and the NRZ modulation rate is 20 Gbps; the receiving antenna adopts a VDI waveguide horn antenna with 26dBi, and the medium frequency bandwidth is DC-20 GHz.
The data control card at the outer end is matched with the terahertz sending equipment to convert the digital signal of the outer end machine into a terahertz signal, the terahertz signal is pushed to the data control card at the inner end through the terahertz channel, the data control card at the inner end is matched with the terahertz receiving equipment to receive the signal, the terahertz signal is demodulated and restored into the digital signal, and the digital signal is pushed to the inner end machine.
The external data is packaged by the data control card, so that the reliability in the data transmission process is achieved. And the data control card performs sub-packaging, packaging and encoding processing on the data according to the internal private protocol structure. After scrambling, the data is pushed to the inner end in an ether hertz mode, and meanwhile, the data control card at the inner end receives the packet according to the channel coding result, so that the reliability of data transmission is effectively improved. The sender process flow is shown in figure 3. In order to reduce the error rate in transmission, the terahertz unidirectional transmission system adopts various technologies such as a forward error correction mechanism based on RS channel coding, a data scrambling mechanism, an application layer data signature and the like to correct and detect.
The hidden channel one-way transmission system based on short-range terahertz communication improves the efficiency of cross-network exchange of files through the establishment of the hidden channel ferry system of short-range terahertz communication, effectively ensures the safety of interactive data, can enrich the data exchange types of the existing system, and enables the data exchange to be more convenient on the premise of safety and reliability.
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 one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
While the present application has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (5)
1. A covert channel unidirectional transmission system based on short-range terahertz communication is characterized by comprising:
the terahertz transmitter comprises an external terminal, a first transmission control card, a terahertz transmitter, a terahertz receiver, a second transmission control card and an internal terminal;
the external terminal is connected with the first transmission control card and used for receiving information of files to be processed;
the first transmission control card is connected with the terahertz transmitter and is used for coding and scrambling the information of the file to be processed to form a data packet to be transmitted;
the terahertz transmitter is used for loading the data packet to be transmitted onto a terahertz signal and transmitting the data packet through a terahertz hidden wireless channel;
the terahertz receiver is connected with the second transmission control card and used for receiving the terahertz signal;
the second transmission control card is connected with the internal terminal and is used for unpacking and restoring the terahertz signals into digital signals to obtain processed file information;
the internal terminal machine is used for receiving and storing the processed file information.
2. The covert channel unidirectional transmission system based on short-range terahertz communication of claim 1, wherein said first transmission control card comprises an encoding module, an error correction encoding module, a scrambling module, a signal conversion module;
the coding module is connected with the error correction coding module and is used for coding the information of the file to be processed;
the error correction coding module is connected with the scrambling module and is used for carrying out forward error correction on the coded information;
the scrambling module is connected with the signal conversion module and is used for carrying out data scrambling on the information after forward error correction;
the signal conversion module is used for converting the information subjected to scrambling to form a transmission data packet which can be sent through a terahertz channel.
3. The covert channel one-way transmission system based on short-range terahertz communication of claim 1, wherein said first transmission control card and said second transmission control card are one-way transmission cards.
4. The covert channel unidirectional transmission system based on short-range terahertz communication of claim 1, wherein said terahertz transmitter is a zero-if transmitter of a VDI harmonic mixer.
5. The covert channel unidirectional transmission system based on short-range terahertz communication of claim 1, wherein said terahertz receiver is a harmonic mixing zero intermediate frequency receiver.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111236016.9A CN113904734A (en) | 2021-10-22 | 2021-10-22 | Covert channel one-way transmission system based on short-range terahertz communication |
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| CN202111236016.9A CN113904734A (en) | 2021-10-22 | 2021-10-22 | Covert channel one-way transmission system based on short-range terahertz communication |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150020136A1 (en) * | 2012-04-24 | 2015-01-15 | Huizhou Tcl Mobile Communication Co., Ltd | Multimedia stream transmission method and system based on terahertz wireless communication |
| CN204291042U (en) * | 2014-12-09 | 2015-04-22 | 天津光电安辰信息技术有限公司 | A kind of high-speed light isolation one-way transmission apparatus |
| CN106998231A (en) * | 2016-01-26 | 2017-08-01 | 中国科学院上海微系统与信息技术研究所 | A kind of Terahertz communication system based on RS/LDPC coding techniques |
| CN109194682A (en) * | 2018-09-29 | 2019-01-11 | 江苏新质信息科技有限公司 | A kind of double one-way isolation switching technology implementation methods |
| CN110995404A (en) * | 2019-11-21 | 2020-04-10 | 复旦大学 | Terahertz secret communication system based on chaotic encryption |
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2021
- 2021-10-22 CN CN202111236016.9A patent/CN113904734A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150020136A1 (en) * | 2012-04-24 | 2015-01-15 | Huizhou Tcl Mobile Communication Co., Ltd | Multimedia stream transmission method and system based on terahertz wireless communication |
| CN204291042U (en) * | 2014-12-09 | 2015-04-22 | 天津光电安辰信息技术有限公司 | A kind of high-speed light isolation one-way transmission apparatus |
| CN106998231A (en) * | 2016-01-26 | 2017-08-01 | 中国科学院上海微系统与信息技术研究所 | A kind of Terahertz communication system based on RS/LDPC coding techniques |
| CN109194682A (en) * | 2018-09-29 | 2019-01-11 | 江苏新质信息科技有限公司 | A kind of double one-way isolation switching technology implementation methods |
| CN110995404A (en) * | 2019-11-21 | 2020-04-10 | 复旦大学 | Terahertz secret communication system based on chaotic encryption |
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Application publication date: 20220107 |