CN113810121A - Optical fiber time synchronization method and system based on encrypted communication - Google Patents
Optical fiber time synchronization method and system based on encrypted communication Download PDFInfo
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 32
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- 230000001360 synchronised effect Effects 0.000 claims abstract description 86
- 230000003287 optical effect Effects 0.000 claims description 8
- 238000011084 recovery Methods 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- 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
- H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
- H04B10/85—Protection from unauthorised access, e.g. eavesdrop protection
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- H—ELECTRICITY
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- 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
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
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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
- H04B10/60—Receivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0075—Arrangements for synchronising receiver with transmitter with photonic or optical means
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0079—Receiver details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0091—Transmitter details
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Abstract
The invention relates to an optical fiber time synchronization method based on encrypted communication, which is applied to a local end and a remote end, and comprises the following steps: receiving and storing information to be synchronized; judging whether the information to be synchronized comprises a preset frame header, if not, re-receiving the information to be synchronized, if so, controlling a decryption unit to receive encrypted information sent by the local end, and starting a timer; when the decryption unit receives the encrypted information, decoding the encrypted information to obtain decrypted information; and judging whether the decryption information is consistent with the information to be synchronized, if not, controlling a timer to count again and accept the encryption information again, and if so, performing time delay compensation according to the information to be synchronized. The method of the invention can ensure the transmission safety of the data by adding the encryption process at the local end and the remote end, and avoid the unsafe problems of time service failure and the like caused by data leakage and tampering or data processing error in the transmission process in the data transmission process.
Description
Technical Field
The invention belongs to the field of optical fiber time service, and particularly relates to an optical fiber time synchronization method and system based on encrypted communication.
Background
The satellite time service synchronization technology is widely applied to industries such as electric power, traffic, communication, banking and finance. However, the precision of satellite time service is still limited, and currently, the precision can only reach nanosecond level. The optical fiber time synchronization technology is a time service means with the highest time service precision at present, the index can reach picosecond magnitude, and error correction can be provided for satellite time service. In addition, the optical fiber time service technology can be compatible with an optical fiber communication system, so that a networked optical fiber time transmission system is built by relying on the existing optical fiber communication network, the requirements of users in various regions can be met, the networking characteristic can be utilized, the reliability and the anti-striking capability of the time service system are greatly enhanced, and the requirements of various users are met. The optical fiber time synchronization technology is applied to the fields of satellite navigation, deep space exploration, 5G communication and the like which need high-precision time synchronization, and can bring important changes to a plurality of industries.
The main function of the optical fiber time synchronization system is to transmit time information and frequency signals to users through optical fibers, and the optical fiber time synchronization system is an important component of a modern time frequency system. The high-precision optical fiber time transmission is to synchronize the time of two places through an optical fiber link, but the information such as time code information, link time delay and the like is possibly tampered in the transmission process, so that unsafe accidents are easily caused.
Disclosure of Invention
In order to solve the above problems in the prior art, the present invention provides an optical fiber time synchronization method and system based on encrypted communication. The technical problem to be solved by the invention is realized by the following technical scheme:
an optical fiber time synchronization method based on encrypted communication is applied to a local end and comprises the following steps:
receiving time code information and link time delay information;
generating information to be synchronized according to the time code information and the link delay information, wherein the information to be synchronized comprises a preset frame header capable of distinguishing characteristic information;
and transmitting the information to be synchronized to a remote end through a laser, and after encrypting the information to be synchronized, transmitting the encrypted information to the remote end.
The invention also provides an optical fiber time synchronization method based on encryption communication, which is applied to a remote end and comprises the following steps:
receiving and storing information to be synchronized;
judging whether the information to be synchronized comprises a preset frame header, if not, re-receiving the information to be synchronized, if so, controlling a decryption unit to receive encrypted information sent by the local end, and starting a timer;
when the decryption unit receives the encrypted information, decoding the encrypted information to obtain decrypted information;
and judging whether the decryption information is consistent with the information to be synchronized, if not, controlling a timer to count again and accept the encryption information again, and if so, performing time delay compensation according to the information to be synchronized.
In a specific embodiment, the determining whether the decryption information is consistent with the information to be synchronized specifically includes:
and judging whether the frame header of the decryption information is consistent with the frame header of the time code information, if not, controlling a timer to restart the timing, if so, judging that the data of the decryption information is consistent with the data of the information to be synchronized, and performing time delay compensation according to the information to be synchronized.
In a specific embodiment, the determining whether the decryption information is consistent with the information to be synchronized specifically includes:
and if the data of the decryption information is judged to be inconsistent with the data of the information to be synchronized, controlling the timer to count again and accept the encryption information again.
In a specific embodiment, the characteristic information includes information for distinguishing a synchronization place and for distinguishing an encryption manner.
In a specific embodiment, the determining whether the decryption information is consistent with the information to be synchronized specifically includes:
and if the frame header of the decryption information is consistent with the information for distinguishing the synchronous place and the encryption mode in the frame header of the information to be synchronized, performing time delay compensation according to the information to be synchronized.
Based on the method, the invention also provides an optical fiber time synchronization system based on encrypted communication, which comprises a local end and a remote end;
the local end comprises: the device comprises a clock source, an encoding unit, a local end laser, a local end circulator, a local end photoelectric detector, a local end decoder, a TDC measuring unit and an encryption unit, wherein the encoding unit, the laser, the circulator, the photoelectric detector, the decoder and the TDC measuring unit are sequentially connected to form a feedback loop;
the clock source is connected with the encoding unit and used for generating time code information;
the TDC measuring unit is connected with the coding unit and is used for measuring link time delay and generating link time delay information;
the encoding unit is also connected with the encryption unit and used for receiving time code information and link delay information, generating information to be synchronized according to the time code information and the link delay information, copying the information to be synchronized and then respectively sending the information to be synchronized to the local laser and the encryption unit, wherein the information to be synchronized comprises a preset frame header capable of distinguishing characteristic information;
the encryption unit is used for encrypting the information to be synchronized to obtain encrypted information and sending the encrypted information to a remote end;
the local end laser is used for converting the information to be synchronized into optical information and then transmitting the optical information to the remote end through an optical fiber;
the remote end includes: the device comprises a remote end circulator, a remote end photoelectric detector, a carrier recovery unit, a PLL unit, a remote end decoder, a time difference measuring unit, an operation controller, a time delay phase control unit, a time keeping unit and a remote end encoder. The remote end circulator, the remote end photoelectric detector, the carrier recovery unit, the PLL unit and the time keeping unit are sequentially connected; the time keeping unit, the time delay phase control unit, the time difference measuring unit and the operation controller are sequentially connected to form a calibration loop;
the decryption unit is connected with the operation controller and used for receiving the encrypted information, decrypting the encrypted information and sending the decrypted information to the operation controller;
the operation controller is used for executing the optical fiber time synchronization method based on encrypted communication.
The invention has the beneficial effects that:
1. according to the optical fiber time synchronization method based on encryption communication, the encryption processes are added at the local end and the remote end, so that the data transmission safety can be ensured, and the unsafe problems of time service failure and the like caused by data leakage and tampering or data processing errors in the transmission process in the data transmission process are avoided.
2. The optical fiber time synchronization method based on encryption communication adds the specific preset frame header in the information to be synchronized sent by the local end, so that the remote end can conveniently screen whether the data information is accurate or not, the judgment can be carried out without subsequent processing, and the communication resources are saved.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic local end flow diagram of an optical fiber time synchronization method based on encrypted communication according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a remote end of an optical fiber time synchronization method based on encrypted communication according to an embodiment of the present invention;
fig. 3 is a block diagram of a fiber time synchronization system based on encrypted communication 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 flow chart of an optical fiber time synchronization method based on encrypted communication according to an embodiment of the present invention, applied to a local end, where the method includes:
s101, receiving time code information and link time delay information;
and S102, generating information to be synchronized according to the time code information and the link time delay information, wherein the information to be synchronized comprises a preset frame header capable of distinguishing characteristic information.
In a specific implementation, the time code information is generally generated by a clock source, and the clock source may generate a time code signal, a carrier signal (the frequency of the carrier signal may be 10MHz, for example), a time signal, and the like. The link delay information is typically generated by a TDC measurement unit. After receiving the signal, the encoding unit forms information to be synchronized with a specific frame structure, such as device address, synchronization location information, encryption mode information, time code information, link delay information, and the like, so as to perform data transmission.
Because the information to be synchronized is important information required by subsequent processing, and the information to be synchronized is required to be encrypted subsequently in the embodiment, so that in order to avoid the irregular use of data, the embodiment modifies and redefines the frame header of the information to be synchronized, and adds information capable of identifying a synchronization place and an encryption mode, thereby facilitating the subsequent decryption processing. The synchronous place and the encryption mode can be associated or not, for example, when the synchronous place and the encryption mode are associated, only a decryption device in a specific region can decrypt, so that the data reliability and the transmission accuracy can be ensured. In addition, the frame header has the function of distinguishing the synchronous places, so that one-to-many clock synchronization can be carried out in a time division multiplexing mode. For example, local-end west ampere needs to perform clock synchronization to multiple remote ends such as beijing, guangzhou, shanghai and the like, and at this time, if the frame header has a function of distinguishing regions, it is not necessary to wait for the current location to complete synchronization and then perform next synchronization, and when the current location is synchronized, synchronization information can be simultaneously sent to other locations at another moment in a time division multiplexing manner without information confusion, so that the synchronization efficiency is improved.
S103, transmitting the information to be synchronized to a remote end through a laser, encrypting the information to be synchronized, and sending the encrypted information to the remote end. It should be noted that the names of the local end and the remote end in this embodiment only serve to distinguish the two end devices, and do not refer to local and remote in geographic location.
When the time code information is sent, one path of the time code information is sent through a normal optical fiber link, the other path of the time code information is sent through an encrypted link, when the time code information is sent through the optical fiber link, the time code information needs to be converted into an optical signal and sent to a remote receiving end through the optical fiber link, the encrypted information can be sent through different transmission links through the encrypted link, and the condition that link faults cannot be distinguished due to the transmission risk of the same link can be avoided. The encryption mode of the embodiment is preferably a quantum encryption mode, so that the method has better matching degree and higher security.
Referring to fig. 2, fig. 2 is a schematic flowchart of an optical fiber time synchronization method based on encrypted communication according to an embodiment of the present invention, and the method is applied to a remote end, and includes:
s201, receiving and storing information to be synchronized; it should be noted that in an actual scenario, the information to be synchronized is not directly sent to the remote end by the local end, and may pass through multiple relay links in the middle, or even may be sent to the remote end through a pseudo link after being stolen with data, so that preliminary determination needs to be performed on the information to be synchronized for subsequent processing.
S202, judging whether the information to be synchronized comprises a preset frame header, if not, re-receiving the information to be synchronized, if so, controlling a decryption unit to receive the encrypted information sent by the local end, and starting a timer.
Because the remote end is a system with encryption, it can be determined whether the data source is accurate by determining whether the data source includes the preset frame header, for example, if the received data does not include the preset frame header, it can be determined that the data is not sent by the matched local end device and may be sent by a pseudo link. The next processing can be carried out only if the received data comprises the preset frame header, and since the information to be synchronized is transmitted to the remote end before the encrypted information, the encrypted information is received and decrypted after the encrypted information is judged to be correct, otherwise, if the information to be synchronized is received and decrypted incorrectly, the processing resources are wasted.
The efficiency caused by overtime can be avoided by means of the timer, the timer sets the timing time, if the correct decryption information is not obtained even if overtime exists, the data is discarded, and the next to-be-synchronized information is received again.
S203, when the decryption unit receives the encrypted information, decoding the encrypted information to obtain decrypted information;
s204, judging whether the decryption information is consistent with the information to be synchronized, if not, controlling a timer to count again and accept the encryption information again, and if so, performing delay compensation according to the information to be synchronized.
For the decryption information, it should also include the frame header and the data, preferably, if it is determined that the decryption information does not include the frame header, it is not necessary to waste time to compare the data fields, and if the decryption information includes the frame header, it is determined whether the frame header information is consistent, and if not (according to the description of this embodiment, it may be that the information for distinguishing the location or the encryption manner is inconsistent), it is indicated that the data is received with an error, and the data is received again. If the data of the decryption information is consistent with the data of the information to be synchronized, whether the data of the decryption information is consistent with the data of the information to be synchronized is continuously judged, if the data of the decryption information is not consistent with the data of the information to be synchronized, the timer is controlled to restart to time and accept the encryption information again, and if the data of the decryption information is consistent with the data of the information to be synchronized, time delay compensation is carried out according to the information to be synchronized.
Example two
In this embodiment, on the basis of the first embodiment, an optical fiber time synchronization system based on encrypted communication is provided, please refer to fig. 3, which includes a local end and a remote end;
the local end comprises: the device comprises a clock source, an encoding unit, a local end laser, a local end circulator, a local end photoelectric detector, a local end decoder, a TDC measuring unit and an encryption unit, wherein the encoding unit, the laser, the circulator, the photoelectric detector, the decoder and the TDC measuring unit are sequentially connected to form a feedback loop;
the clock source is connected with the encoding unit and used for generating time code information;
the TDC measuring unit is connected with the coding unit and is used for measuring link time delay and generating link time delay information;
the encoding unit is also connected with the encryption unit and used for receiving time code information and link delay information, generating information to be synchronized according to the time code information and the link delay information, copying the information to be synchronized and then respectively sending the information to be synchronized to the local laser and the encryption unit, wherein the information to be synchronized comprises a preset frame header capable of distinguishing characteristic information;
the encryption unit is used for encrypting the information to be synchronized to obtain encrypted information and sending the encrypted information to a remote end;
the local end laser is used for converting the information to be synchronized into optical information and then transmitting the optical information to the remote end through an optical fiber;
the remote end includes: the device comprises a remote end circulator, a remote end photoelectric detector, a carrier recovery unit, a PLL unit, a remote end decoder, a time difference measuring unit, an operation controller, a time delay phase control unit, a time keeping unit and a remote end encoder. The remote end circulator, the remote end photoelectric detector, the carrier recovery unit, the PLL unit and the time keeping unit are sequentially connected; the time keeping unit, the time delay phase control unit, the time difference measuring unit and the operation controller are sequentially connected to form a calibration loop;
the decryption unit is connected with the operation controller and used for receiving the encrypted information, decrypting the encrypted information and sending the decrypted information to the operation controller;
the arithmetic controller is used for executing the steps of the method of the first embodiment.
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.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, apparatus (device), or computer program product. Accordingly, this application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects that may all generally be referred to herein as a "module" or "system. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. A computer program stored/distributed on a suitable medium supplied together with or as part of other hardware, may also take other distributed forms, such as via the Internet or other wired or wireless telecommunication systems.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (devices) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
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 (7)
1. An optical fiber time synchronization method based on encrypted communication is applied to a local end, and is characterized by comprising the following steps:
receiving time code information and link time delay information;
generating information to be synchronized according to the time code information and the link delay information, wherein the information to be synchronized comprises a preset frame header capable of distinguishing characteristic information;
and transmitting the information to be synchronized to a remote end through a laser, and after encrypting the information to be synchronized, transmitting the encrypted information to the remote end.
2. An optical fiber time synchronization method based on encrypted communication is applied to a remote end and is characterized by comprising the following steps:
receiving and storing information to be synchronized;
judging whether the information to be synchronized comprises a preset frame header, if not, re-receiving the information to be synchronized, if so, controlling a decryption unit to receive encrypted information sent by the local end, and starting a timer;
when the decryption unit receives the encrypted information, decoding the encrypted information to obtain decrypted information;
and judging whether the decryption information is consistent with the information to be synchronized, if not, controlling a timer to count again and accept the encryption information again, and if so, performing time delay compensation according to the information to be synchronized.
3. The optical fiber time synchronization method based on encrypted communication according to claim 2, wherein determining whether the decryption information is consistent with the information to be synchronized specifically comprises:
and judging whether the frame header of the decryption information is consistent with the frame header of the time code information, if not, controlling a timer to restart the timing, if so, judging that the data of the decryption information is consistent with the data of the information to be synchronized, and performing time delay compensation according to the information to be synchronized.
4. The optical fiber time synchronization method based on encrypted communication according to claim 3, wherein determining whether the decryption information is consistent with the information to be synchronized specifically comprises:
and if the data of the decryption information is judged to be inconsistent with the data of the information to be synchronized, controlling the timer to count again and accept the encryption information again.
5. The encryption communication-based fiber time synchronization method according to claim 3, wherein the characteristic information includes information for distinguishing a synchronization place and for distinguishing an encryption manner.
6. The optical fiber time synchronization method based on encrypted communication according to claim 5, wherein determining whether the decryption information is consistent with the information to be synchronized specifically comprises:
and if the frame header of the decryption information is consistent with the information for distinguishing the synchronous place and the encryption mode in the frame header of the information to be synchronized, performing time delay compensation according to the information to be synchronized.
7. An optical fiber time synchronization system based on encrypted communication, which comprises a local end and a remote end, is characterized in that,
the local end comprises: the device comprises a clock source, an encoding unit, a local end laser, a local end circulator, a local end photoelectric detector, a local end decoder, a TDC measuring unit and an encryption unit, wherein the encoding unit, the laser, the circulator, the photoelectric detector, the decoder and the TDC measuring unit are sequentially connected to form a feedback loop;
the clock source is connected with the encoding unit and used for generating time code information;
the TDC measuring unit is connected with the coding unit and is used for measuring link time delay and generating link time delay information;
the encoding unit is also connected with the encryption unit and used for receiving time code information and link delay information, generating information to be synchronized according to the time code information and the link delay information, copying the information to be synchronized and then respectively sending the information to be synchronized to the local laser and the encryption unit, wherein the information to be synchronized comprises a preset frame header capable of distinguishing characteristic information;
the encryption unit is used for encrypting the information to be synchronized to obtain encrypted information and sending the encrypted information to a remote end;
the local end laser is used for converting the information to be synchronized into optical information and then transmitting the optical information to the remote end through an optical fiber;
the remote end includes: the device comprises a remote end circulator, a remote end photoelectric detector, a carrier recovery unit, a PLL unit, a remote end decoder, a time difference measuring unit, an operation controller, a time delay phase control unit, a time keeping unit and a remote end encoder. The remote end circulator, the remote end photoelectric detector, the carrier recovery unit, the PLL unit and the time keeping unit are sequentially connected; the time keeping unit, the time delay phase control unit, the time difference measuring unit and the operation controller are sequentially connected to form a calibration loop;
the decryption unit is connected with the operation controller and used for receiving the encrypted information, decrypting the encrypted information and sending the decrypted information to the operation controller; the arithmetic controller is configured to perform the method of any one of claims 2-6.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114584300A (en) * | 2022-03-02 | 2022-06-03 | 中国科学院国家授时中心 | Encryption and decryption method and system for bidirectional time service |
| CN114745362A (en) * | 2022-03-25 | 2022-07-12 | 中国科学院国家授时中心 | Remote upgrading method and system based on optical fiber time service |
| CN115642979A (en) * | 2022-10-19 | 2023-01-24 | 中国科学院国家授时中心 | Dual-mode time service method and system based on optical fiber |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6775274B1 (en) * | 2000-01-27 | 2004-08-10 | International Business Machines Corporation | Circuit and method for providing secure communication over data communication interconnects |
| CN101998193A (en) * | 2009-08-25 | 2011-03-30 | 中兴通讯股份有限公司 | Key protection method and system for passive optical network |
| CN102065344A (en) * | 2009-11-12 | 2011-05-18 | 中兴通讯股份有限公司 | Data transmission method and gigabit-capable passive optical network system |
| WO2014019526A1 (en) * | 2012-07-31 | 2014-02-06 | 深圳光启创新技术有限公司 | Visible light encryption method, decryption method, communication device and communication system |
| CN109413113A (en) * | 2018-12-28 | 2019-03-01 | 中国电子科技集团公司第三十四研究所 | A kind of key synchronization device and method based on optical-fiber network safety of physical layer |
-
2021
- 2021-09-02 CN CN202111028721.XA patent/CN113810121B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6775274B1 (en) * | 2000-01-27 | 2004-08-10 | International Business Machines Corporation | Circuit and method for providing secure communication over data communication interconnects |
| CN101998193A (en) * | 2009-08-25 | 2011-03-30 | 中兴通讯股份有限公司 | Key protection method and system for passive optical network |
| CN102065344A (en) * | 2009-11-12 | 2011-05-18 | 中兴通讯股份有限公司 | Data transmission method and gigabit-capable passive optical network system |
| WO2014019526A1 (en) * | 2012-07-31 | 2014-02-06 | 深圳光启创新技术有限公司 | Visible light encryption method, decryption method, communication device and communication system |
| CN109413113A (en) * | 2018-12-28 | 2019-03-01 | 中国电子科技集团公司第三十四研究所 | A kind of key synchronization device and method based on optical-fiber network safety of physical layer |
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| CN114584300A (en) * | 2022-03-02 | 2022-06-03 | 中国科学院国家授时中心 | Encryption and decryption method and system for bidirectional time service |
| CN114584300B (en) * | 2022-03-02 | 2024-02-02 | 中国科学院国家授时中心 | Encryption and decryption method and system for bidirectional time service |
| CN114745362A (en) * | 2022-03-25 | 2022-07-12 | 中国科学院国家授时中心 | Remote upgrading method and system based on optical fiber time service |
| CN114745362B (en) * | 2022-03-25 | 2023-08-29 | 中国科学院国家授时中心 | Remote upgrading method and system based on optical fiber time service |
| CN115642979A (en) * | 2022-10-19 | 2023-01-24 | 中国科学院国家授时中心 | Dual-mode time service method and system based on optical fiber |
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Inventor after: Liu Tao Inventor after: Zhang Shougang Inventor after: Guo Xinxing Inventor after: Dong Ruifang Inventor after: Liu Bo Inventor after: Kong Weicheng Inventor after: Li Bo Inventor before: Guo Xinxing Inventor before: Liu Tao Inventor before: Zhang Shougang Inventor before: Dong Ruifang Inventor before: Liu Bo Inventor before: Kong Weicheng Inventor before: Li Bo |