CN207150608U - A kind of quantum key distribution system of channel multiplexing - Google Patents
A kind of quantum key distribution system of channel multiplexing Download PDFInfo
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- CN207150608U CN207150608U CN201720752127.8U CN201720752127U CN207150608U CN 207150608 U CN207150608 U CN 207150608U CN 201720752127 U CN201720752127 U CN 201720752127U CN 207150608 U CN207150608 U CN 207150608U
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Abstract
A kind of quantum key distribution system of channel multiplexing, transmitting terminal includes signal laser, transmitting terminal ethernet module, 8B/10B coding modules, serializer and transmitting terminal SFP optical modules, single-photon detector is provided with corresponding to receiving terminal, receiving terminal SFP optical modules, 8B/10B decoder modules, deserializer and receiving terminal ethernet module, transmitting terminal ethernet module, 8B/10B coding modules, serializer and transmitting terminal SFP optical modules are sequentially connected, receiving terminal SFP optical modules, 8B/10B decoder modules, deserializer and receiving terminal ethernet module are sequentially connected, transmitting terminal SFP optical modules are connected by optical fiber with receiving terminal SFP optical modules, signal laser is connected by optical fiber with single-photon detector.The utility model passes through in authentication information of the synchronizing clock signals insertion after 8B/10B is encoded, and transmitted using optical fiber from the transmitting terminal of system to receiving terminal, the use of classical channel has been abandoned, has not only reduced the cost of system operation, quantum key generating rate can also be guaranteed.
Description
Technical field
Optical transport safety communication technology field is the utility model is related to, more particularly to a kind of quantum key of channel multiplexing point
Hair system.
Background technology
With a wide range of popularization of internet, the information transmission between the mankind has reached unprecedented quantity and frequency,
On the internet, therefore, the mankind have also arrived unprecedented various privacy informations to the demand of secret communication for exposure more and more
Height.The cipher mode of present internet information safety is referred to as " public-key cryptography " cryptosystem, and its principle is to pass through encryption
Algorithm, the public-key cryptography propagated on network is generated, and stay in the private key of computer-internal, two keys must coordinate and make
With complete encryption and decryption processes could be realized.
The encryption standard that modern the Internet uses is the RSA Algorithm being born the 1970s, i.e., using matter several greatly because
Son, which decomposes, to be difficult to calculate to ensure the security of key.
Quantum-key distribution is that physicist Bennett in 1984 and cryptologist Brassard are proposed based on quantum force
The BB84 agreements of measuring principle are learned, quantum-key distribution can fundamentally ensure that the security of key.
As shown in figure 1, quantum key distribution system generally comprises three transmission in transmitting terminal and receiving terminal in the prior art
Passage：
Synchronizing channel, for transmitting synchronous light pulse sequence；
Signaling channel, for transmitting single photon pulses sequence；
Classical channel, for the letter for amplifying scheduling algorithm to base, error correction, secrecy in authentication, quantum key post processing
Breath transmission uses.A plurality of channel transmits the operation cost for also increasing system to a certain extent respectively.
Synchronizing channel and signaling channel can be transmitted by the method for wavelength-division multiplex in an optical fiber, as shown in Fig. 2 adopting
Wavelength division multiplexer is needed to use with wave division multiplex mode, the complexity of system is further increased and improves production cost.
Classical channel is typically transmitted by public network, such as Ethernet, Metropolitan Area Network (MAN), and public network can not ensure the reliable of height
Property, the problems such as loss occurs in signals transmission and needs to retransmit, and the delay of signal transmission is not known yet, the amount of causing
The speed of sub-key processing declines, and influences the performance of system.
Utility model content
The utility model purpose is to provide a kind of quantum key distribution system of channel multiplexing, to solve in the prior art
The transmitting terminal of quantum key distribution system transmits the fortune for increasing system to a certain extent with receiving terminal respectively by a plurality of channel
Cost is sought, and the speed of quantum key processing declines, the bad technical bug of systematic function.
What the technical solution of the utility model was realized in：
A kind of quantum key distribution system of channel multiplexing, including transmitting terminal and receiving terminal, the transmitting terminal include signal
Laser, transmitting terminal ethernet module, 8B/10B coding modules, serializer and transmitting terminal SFP optical modules, the receiving terminal pair
That answers is provided with single-photon detector, receiving terminal SFP optical modules, 8B/10B decoder modules, deserializer and receiving terminal Ethernet
Module, the transmitting terminal ethernet module, 8B/10B coding modules, serializer and transmitting terminal SFP optical modules are sequentially connected, institute
State receiving terminal SFP optical modules, 8B/10B decoder modules, deserializer and receiving terminal ethernet module to be sequentially connected, the transmission
End SFP optical modules are connected by optical fiber with receiving terminal SFP optical modules, and the signal laser passes through optical fiber and single-photon detector
Connection.
Preferably, the transmitting terminal SFP optical modules are connected respectively receiving terminal with signal laser using same optical fiber
SFP optical modules and single-photon detector.
Preferably, the transmitting terminal of the optical fiber is provided with wavelength division multiplexer, and the receiving terminal of optical fiber is provided with solution wavelength-division multiplex
Device.
Preferably, the transmitting terminal of the optical fiber is provided with time division multiplexing module, and the receiving terminal of optical fiber is provided with the solution time-division and answered
Use module.
The invention also discloses a kind of quantum key distribution system of channel multiplexing, comprise the following steps：
1) authentication data is packed：The host-host protocol of receiving terminal and transmitting terminal uses standard ethernet protocol, the body of transmitting terminal
Part certification, the authentication data information to base, error correction, secrecy amplification are packaged into Ethernet bag by ethernet module, deliver to 8B/
10B coding modules；
2) synchronised clock insertion authentication data：Authentication data in Ethernet bag is compiled using 8B/10B coding modules
Yard, it will be embedded to after coding in synchronised clock information in authentication information；
3) information transmission mode is changed：The authentication data information of synchronised clock information is embedded with by serializer by parallel
Low speed signal is converted to the serial signal of high speed；
4) signal transmits：The serial signal of high speed is converted to optical signal by electric signal by transmitting terminal SFP optical modules and passed through
Optical fiber is transmitted to receiving terminal SFP optical modules, synchronous signal laser transmission signal light and transmitted by optical fiber to the monochromatic light of receiving terminal
Sub- detector is detected；
5) synchronised clock recovers：Clock recovery unit in receiving terminal SFP optical modules is from being embedded with synchronised clock information
Embedded synchronised clock information is recovered in authentication data information, while single-photon detector is used in the synchronised clock information transfer
In single photon detection；
6) the 8B/10B decoder modules decoding of receiving terminal：The 8B/10B decoder modules of receiving terminal solve to authentication data
Code；
7) receiving terminal ethernet module is unpacked：Receiving terminal ethernet module is recognized by tearing the corresponding identity of Ethernet bag reception open
The authentication information amplified to base, error correction, secrecy in card, quantum key post processing.
Preferably, the authentication data for being embedded with synchronised clock information and flashlight by way of wavelength-division multiplex by sending out
Sending end is transmitted to receiving terminal.
Preferably, the authentication data for being embedded with synchronised clock information with flashlight by time-multiplexed mode by sending out
Sending end is transmitted to receiving terminal.
Compared with prior art, the utility model has following beneficial effect：
The quantum key distribution system of channel multiplexing of the present utility model, by the way that synchronizing clock signals insertion is passed through into 8B/
In authentication information after 10B codings, and transmitted using optical fiber from the transmitting terminal of system to receiving terminal, abandoned making for classical channel
With, in addition, by wavelength-division multiplex or the time-multiplexed mode optical fiber also can simultaneous transmission of signals light pulse, i.e.,：When synchronous
Clock signal is embedded into inside classical optical communication data, and classical optic communication and flashlight are using time division multiplexing or wavelength-division multiplex
Mode is transmitted.Authentication, quantum key post processing in base, error correction, secrecy amplification etc. authentication information in special optical fiber
In be transmitted if, not only reduce the cost of system operation, quantum key generating rate can also be guaranteed.
Brief description of the drawings
Fig. 1 is a kind of quantum key distribution system schematic diagram of the prior art；
Fig. 2 is schematic diagram of the quantum key distribution of the prior art based on wavelength-division multiplex；
Fig. 3 is the theory diagram of the quantum key distribution system of the utility model channel multiplexing；
Fig. 4 is the flow chart of the quantum key delivering method of the utility model channel multiplexing；
Fig. 5 is that the utility model is based on time-multiplexed signal sequence timing diagram.
In figure：Transmitting terminal 100, signal laser 101, transmitting terminal ethernet module 102,8B/10B coding modules 103, string
Row device 104, transmitting terminal SFP optical modules 105, time division multiplexing module 106, receiving terminal 200, single-photon detector 201, receiving terminal
SFP optical modules 202,8B/10B decoder modules 203, deserializer 204, receiving terminal ethernet module 205, solution time division multiplexing module
206th, optical fiber 300.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the utility model is clearly and completely described.
As shown in figure 3, a kind of quantum key distribution system of channel multiplexing, including transmitting terminal 100 and receiving terminal 200, institute
Stating transmitting terminal 100 includes signal laser 101, transmitting terminal ethernet module 102,8B/10B coding modules 103, serializer 104
And transmitting terminal SFP optical modules 105, single-photon detector 201, receiving terminal SFP optical modes are provided with corresponding to the receiving terminal 200
Block 202,8B/10B decoder modules 203, deserializer 204 and receiving terminal ethernet module 205, the transmitting terminal ethernet module
102nd, 105 pieces of 8B/10B coding modules 103, serializer 104 and transmitting terminal SFP optical modes are sequentially connected, the receiving terminal SFP light
Module 202,8B/10B decoder modules 203, deserializer 204 and receiving terminal ethernet module 205 are sequentially connected, the transmitting terminal
SFP optical modules 105 are connected by optical fiber 300 with receiving terminal SFP optical modules 202, and the signal laser 101 passes through optical fiber 300
It is connected with single-photon detector 201.The transmitting terminal SFP optical modules 105 are divided with signal laser 101 using same optical fiber 300
Receiving terminal SFP optical modules 202 and single-photon detector 201 Dui Ying not be connected, i.e., is believed original three channel multiplexings into one
Road.The transmitting terminal 100 of the optical fiber 300 is provided with wavelength division multiplexer, and the receiving terminal 200 of optical fiber 300 is provided with solution wavelength-division multiplex
Device, two ways of optical signals is multiplexed using wavelength division multiplexer and solution wavelength division multiplexer, it is ensured that the stability of optical signal polarization.It is another
In kind mode, the transmitting terminal 100 of the optical fiber 300 is provided with time division multiplexing module 106, and the receiving terminal 200 of optical fiber 300 is provided with
Solution time division multiplexing module 206, the time division multiplexing module 106 be only by unlike signal light time sharing transmissions to receiving terminal 200, this
The ethernet module of utility model, 8B/10B coding/decoding modules, serializer/de-serializers module can use FPGA to realize, this practicality
The 8B/10B codings of new middle use are a kind of coded systems in high-speed serial communication, and its purpose is exactly by by a 8bit
The data of width are converted into the character of 10bit width by mapping mechanism, to balance in bit stream 0 and 1 number, 8b/10b codings
Mode can transmit the 0 and 1 of equal number on the data line, so as to reduce intersymbol interference, and provide enough data edges,
Clock information is embedded in data, as shown in figure 5, by 8B/10B coded datas be 1010001011 and single photon in light
Timing condition in fibre transmission, its orbicular spot representation signal light single photon, is recognizing for embedded synchronizing clock signals between flashlight
Demonstrate,prove information signal.
As shown in figure 4, the invention also discloses a kind of quantum key distribution system of channel multiplexing, including following step
Suddenly：
1) authentication data is packed：The host-host protocol of receiving terminal and transmitting terminal uses standard ethernet protocol, the body of transmitting terminal
Part certification, the authentication data information to base, error correction, secrecy amplification are packaged into Ethernet bag by ethernet module, deliver to 8B/
10B coding modules；
2) synchronised clock insertion authentication data：Authentication data in Ethernet bag is compiled using 8B/10B coding modules
Yard, it will be embedded to after coding in synchronised clock information in authentication information；
3) information transmission mode is changed：The authentication data information of synchronised clock information is embedded with by serializer by parallel
Low speed signal is converted to the serial signal of high speed；
4) signal transmits：The serial signal of high speed is converted to optical signal by electric signal by transmitting terminal SFP optical modules and passed through
Optical fiber is transmitted to receiving terminal SFP optical modules, synchronous signal laser transmission signal light and transmitted by optical fiber to the monochromatic light of receiving terminal
Sub- detector is detected；
5) synchronised clock recovers：Clock recovery unit in receiving terminal SFP optical modules is from being embedded with synchronised clock information
Embedded synchronised clock information is recovered in authentication data information, receiving terminal SFP optical modules are according to the enough data of data mesopodium
Embedded clock is recovered in side, i.e., obtains clock from the exchange of data-signal；It is simultaneously single in the synchronised clock information transfer
Photon detector is used for single photon detection；
6) the 8B/10B decoder modules decoding of receiving terminal：The 8B/10B decoder modules of receiving terminal solve to authentication data
Code, wherein receiving terminal 8B/10B decodings are the inverse process of transmitting terminal 8B/10B codings；
7) receiving terminal ethernet module is unpacked：Receiving terminal ethernet module is recognized by tearing the corresponding identity of Ethernet bag reception open
The authentication information amplified to base, error correction, secrecy in card, quantum key post processing.
The authentication data for being embedded with synchronised clock information is passed with flashlight by way of wavelength-division multiplex by transmitting terminal
Transport to receiving terminal.
The authentication data for being embedded with synchronised clock information is passed with flashlight by time-multiplexed mode by transmitting terminal
Transport to receiving terminal.
Knowable to comprehensive structure of the present utility model and implementation method, the quantum key distribution of channel multiplexing of the present utility model
System, by by authentication information of the synchronizing clock signals insertion after 8B/10B is encoded, and use hair of the optical fiber from system
Sending end is transmitted to receiving terminal, has abandoned the use of classical channel, in addition, passing through wavelength-division multiplex or the time-multiplexed mode light
It is fine also can simultaneous transmission of signals light pulse, i.e.,：Synchronizing clock signals are embedded into inside classical optical communication data, and classical optic communication
Transmitted with flashlight by the way of time division multiplexing or wavelength-division multiplex.Authentication, quantum key post processing in base, entangle
If the authentication informations such as wrong, secrecy amplification are transmitted in special optical fiber, the cost of system operation, quantum are not only reduced
Key generating rate can also be guaranteed.
Claims (4)
- A kind of 1. quantum key distribution system of channel multiplexing, it is characterised in that：Including transmitting terminal and receiving terminal, the transmitting terminal It is described including signal laser, transmitting terminal ethernet module, 8B/10B coding modules, serializer and transmitting terminal SFP optical modules Single-photon detector, receiving terminal SFP optical modules, 8B/10B decoder modules, deserializer and reception are provided with corresponding to receiving terminal Hold ethernet module, the transmitting terminal ethernet module, 8B/10B coding modules, serializer and transmitting terminal SFP optical modules according to Secondary connection, receiving terminal SFP optical modules, 8B/10B decoder modules, deserializer and the receiving terminal ethernet module are sequentially connected, The transmitting terminal SFP optical modules are connected by optical fiber with receiving terminal SFP optical modules, and the signal laser passes through optical fiber and monochromatic light Sub- detector connection.
- 2. the quantum key distribution system of channel multiplexing as claimed in claim 1, it is characterised in that the transmitting terminal SFP light Module is connected respectively receiving terminal SFP optical modules and single-photon detector with signal laser using same optical fiber.
- 3. the quantum key distribution system of channel multiplexing as claimed in claim 2, it is characterised in that the transmitting terminal of the optical fiber Wavelength division multiplexer is provided with, the receiving terminal of optical fiber is provided with solution wavelength division multiplexer.
- 4. the quantum key distribution system of channel multiplexing as claimed in claim 2, it is characterised in that the transmitting terminal of the optical fiber Time division multiplexing module is provided with, the receiving terminal of optical fiber is provided with solution time division multiplexing module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720752127.8U CN207150608U (en) | 2017-06-27 | 2017-06-27 | A kind of quantum key distribution system of channel multiplexing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107276753A (en) * | 2017-06-27 | 2017-10-20 | 浙江九州量子信息技术股份有限公司 | The quantum key distribution system and method for a kind of channel multiplexing |
| WO2020134643A1 (en) * | 2018-12-28 | 2020-07-02 | 江苏亨通问天量子信息研究院有限公司 | System for teaching and demonstrating eavesdropping in fiber-optic communication |
-
2017
- 2017-06-27 CN CN201720752127.8U patent/CN207150608U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107276753A (en) * | 2017-06-27 | 2017-10-20 | 浙江九州量子信息技术股份有限公司 | The quantum key distribution system and method for a kind of channel multiplexing |
| CN107276753B (en) * | 2017-06-27 | 2023-10-10 | 浙江九州量子信息技术股份有限公司 | Quantum key distribution system and method for channel multiplexing |
| WO2020134643A1 (en) * | 2018-12-28 | 2020-07-02 | 江苏亨通问天量子信息研究院有限公司 | System for teaching and demonstrating eavesdropping in fiber-optic communication |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191028 Address after: 311201 no.436-12 Beitang Road, economic and Technological Development Zone, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee after: Zhejiang Haokun Quantum Technology Co., Ltd Address before: 311201 No. 436-1 Beitang Road, Xiaoshan Economic and Technological Development Zone, Hangzhou, Zhejiang Province Patentee before: Zhejiang Kyushu quantum information technology Limited by Share Ltd |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200907 Address after: No.436 Beitang Road, economic and Technological Development Zone, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee after: ZHEJIANG QTEC INFORMATION TECHNOLOGY Co.,Ltd. Address before: 311201 no.436-12 Beitang Road, economic and Technological Development Zone, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee before: Zhejiang Haokun Quantum Technology Co.,Ltd. |