CN104202157A - Quantum key distribution (QKD) system synchronization method and device - Google Patents
Quantum key distribution (QKD) system synchronization method and device Download PDFInfo
- Publication number
- CN104202157A CN104202157A CN201410472681.1A CN201410472681A CN104202157A CN 104202157 A CN104202157 A CN 104202157A CN 201410472681 A CN201410472681 A CN 201410472681A CN 104202157 A CN104202157 A CN 104202157A
- Authority
- CN
- China
- Prior art keywords
- qkd
- synchronizable optical
- wavelength
- equipment
- optical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
- H04L9/0852—Quantum cryptography
-
- 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
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2589—Bidirectional transmission
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
- H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
- H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
Abstract
The invention provides a quantum key distribution (QKD) system synchronization method. A quantum key distribution system is a duplex QKD system, Alices of QKD units at two ends of the duplex QKD system are capable of transmitting two kinds of synchronous light different in wave length, and the transmitted synchronous light is transmitted in the same optical fiber link, so that when two QKD links are operated on the optical fiber link, the wave length of the synchronous light on the two links is different, Bobs of the QKD units at two ends adopt a light filter to separate the synchronous light, and corresponding discriminators are adopted to have the synchronous light discriminated. The invention further provides a synchronization device of the quantum key distribution system. The quantum key distribution system synchronization method and device have the advantages that the synchronous light different in wavelength is adopted at two ends of the duplex QKD system respectively, so that the problem that the duplex QKD system cannot perform full-duplex operation due to reflection of the synchronous light is solved; the device is simple and convenient to operate and convenient for batch production.
Description
Technical field
The present invention relates to quantum secret communication field, a kind of synchronous method of quantum key distribution system and the duplexing QKD system based on this synchronous method are particularly provided.
Background technology
Quantum key distribution (Quantum Key Distribution, QKD) be with the fundamental difference of classic key system, it adopts single photon or entangled photons to the carrier as key, by quantum-mechanical general principle ensured can not the eavesdropping of this process, can not the property decoded, thereby a kind of safer key code system is provided.At present, utilizing entangled photons is not also very ripe to realizing the technology of quantum key distribution, and distance practicality also has suitable distance; And the quantum key distribution technology realizing based on single photon is ripe day by day.
The quantum key distribution technology realizing based on single photon has two kinds of coded systems conventionally: polarization encoder and phase code.In polarization encoder mode as example, the basic process of quantum key distribution is:
1) system transmit leg (agreement is called Alice) is selected two groups of basic vectors, sends at random a string photon with different polarization states;
2) system recipient (agreement is called Bob) select at random measure basic vector receive, due to the problem of detection efficient and path attenuation, Bob can not detect all photons, can only be random on some positions, detect photon;
3) he uses Bob notice Alice on the position of detecting photon is any basic vector;
4) basic vector that the basic vector using when Alice contrast oneself sends and Bob use while measurement, if the basic vector that both use in certain place, position is consistent, the basic vector using while being Bob measurement is correct, retain this locational information, and tell Bob that the measurement basic vector that he uses on which position is correct;
5) Bob leaves the correct locational information of basic vector of measuring;
6) Alice and Bob have just shared a string random key like this.
Can be found out by said process, in the process of quantum key distribution, Alice and Bob need to carry out basic vector comparison, compare Alice and on some positions, send whether the basic vector that photon uses is consistent with the measurement basic vector that Bob uses in the time surveying the photon of this position.In order to ensure that Alice and Bob carry out basic vector comparison on same position, between transmit leg and recipient, need accurate " position " synchronous, otherwise the key at final Alice and Bob two ends there will be inconsistent phenomenon.So the synchronous method of system just seems and is even more important.
Above-mentioned " position ", the description of image is exactly which pulse in one group of light pulse.At transmitting terminal, the light pulse of flashlight sends continuously with fixed frequency, between adjacent two light pulses, has fixing time slot, and the light pulse of synchronizable optical is to send continuously with the fixed frequency more much lower than flashlight transmission frequency.In the time that flashlight and synchronizable optical send simultaneously, the continuously flashlight sending between two synchronizable optical pulses is one group of light pulse.Receiving terminal, in the time receiving continuously flashlight, by detecting two signal pulses between synchronizable optical pulse, can be determined one group of light pulse.Described " position " information, can be determined by which pulse signal in one group of signal pulse.Owing to having fixing time slot between adjacent two signal pulses, above-mentioned " position " is also temporal information.
Fig. 1 represents the synchronous method of prior art scheme.The method of QKD system synchronization is, the Alice of QKD equipment sends synchronizable optical, and Bob receives synchronizable optical and completes examination, produces synchronizing signal.Quantum channel in system only has an optical fiber, and flashlight and synchronizable optical are transmitted in same optical fiber.
In the realization of QKD system, Alice may comprise N flashlight laser (concrete quantity is depending on adopted QKD coding protocol) and a synchronizable optical laser, and signal light wavelength is λ
signal, synchronous light wavelength is λ
sync, and λ
signal≠ λ
sync, these two kinds are optically coupled in same optical fiber, be transferred to Bob end by optical fiber link.Bob end comprises an optical filter part, for example dense wavelength division multiplexing (DWDM) device, and its centre wavelength is λ
signal, flashlight and synchronizable optical can be separated, then the flashlight of separating is done to corresponding subsequent treatment, the synchronizable optical of separating is sent in synchronizable optical discriminator and screened.The signal that discriminator is screened is out as synchronizing signal, for flashlight subsequent processes.
As shown in Figure 2, every equipment all comprises transmitting terminal Alice and receiving terminal Bob, between two QKD equipment, can set up two QKD links simultaneously for unidirectional (one-way) based on the existing method of synchronization, duplexing QKD system.Article two, QKD link respectively: the Bob link setup of the Alice of QKD equipment _ L and QKD equipment _ R; The Bob link setup of the Alice of QKD equipment _ R and QKD equipment _ L.The synchronizable optical of being sent by the synchronizable optical laser of the Alice of QKD equipment _ L, after optical fiber link transmission, is screened by the synchronizable optical discriminator of the Bob of QKD equipment _ R; The synchronizable optical of being sent by the synchronizable optical laser of the Alice of QKD equipment _ R, after optical fiber link transmission, is screened by the synchronizable optical discriminator of the Bob of QKD equipment _ L.
Can find out from prior art, traditional duplexing QKD system based on synchronous, the synchronizable optical that the Alice of its QKD equipment _ L sends with the Alice of QKD equipment _ R is that wavelength is identical.
In the middle of this area, be defined as " two-way QKD system ", this refers in the implementation of QKD, and flashlight is sent to the 2nd QKD end from a QKD end, returns to a QKD end subsequently along original optical path.In general, the flashlight of issuing the 2nd QKD end from a QKD end is stronger, average each pulse hundreds of or several thousand photons, and before returning to a QKD end, be attenuated to single photon magnitude (photon of average each pulse or still less) at the 2nd QKD end.On the optical fiber link of system, only having a QKD link, is the process of two-way (two-way), single work.
Documents is as " having the two-way QKD system that back scattering suppresses " (patent No. is 200580025415.3) of MAGIQ Technologies Inc., its QKD station has the lasing light emitter luminous with different wavelength, and multiple single-photon detector (SPD) unit.In two-way QKD system, rear orientation light is generally produced in the optical fiber link that connects the first and second QKD stations by stronger output signal light.In order to reduce or to avoid rear orientation light to disturb the detection of the flashlight that returns to a QKD station from the 2nd QKD station, this patent in Sequential Activation the one QKD stands each in SPD unit to SPD in, the light source that Sequential Activation is different.This patent is to be solved is that in two-way QKD system, the detection of flashlight is subject to the problem that rear orientation light disturbs, and it is had relatively high expectations to related Control System, need to be according to the length of actual fiber link, calculate the Expected Arrival Time of flashlight, carry out the active control of different light sources, SPD unit at Expected Arrival Time, control precision requires high, and the process of this Sequential Activation continues to carry out.
When existing synchronous method is applied to unidirectional (one-way), duplex system, as shown in Figure 2, the synchronizable optical wavelength that the Alice of the Alice of QKD equipment _ L and QKD equipment _ R sends is identical, and transmits in same optical fiber.Because actual fiber chain environment is undesirable, there is fiber end face reflex.For example, when after the Alice of QKD equipment _ L and the Bob link startup of QKD equipment _ R, may there is reflex in the synchronizable optical that the Alice of QKD equipment _ L sends, its reverberation enters the Bob of QKD equipment _ L, thereby causes the synchronizing signal mistake in the Alice of QKD equipment _ R and the Bob link of QKD equipment _ L to be screened; When after the Alice of QKD equipment _ R and the Bob link startup of QKD equipment _ L, the synchronizable optical that the Alice of QKD equipment _ R sends can be interfered, and causes system normally not move like this.
Summary of the invention
The invention provides a kind of synchronous method and device of quantum key distribution system, for solving because the Alice of duplexing QKD system QKD equipment _ L is identical with the synchronous light wavelength of Alice of QKD equipment _ R, and the synchronizable optical causing reflects the problem that causes two QKD links not move simultaneously.
The present invention solves the problems of the technologies described above by the following technical solutions: synchronous method of the present invention, be used in duplexing QKD system, the Alice of duplex QKD system two ends QKD equipment can send respectively two kinds of synchronizable optical that wavelength is different, the synchronizable optical sending is transmitted in same optical fiber link, while making to move two QKD links on optical fiber link simultaneously, article two, the synchronizable optical wavelength on link is different, and the Bob of two ends QKD equipment adopts corresponding discriminator to screen synchronizable optical.
It should be noted that " two-way QKD system " in " duplexing QKD system " concept and the documents that the present invention uses is not same concept.
What in documents " having the two-way QKD system that back scattering suppresses ", propose is a kind of implementation of QKD, is not the synchronous method of system.In this documents, the definition of " bilateral system " is that the QKD equipment (Bob) of system one end sends stronger flashlight, transfer to the QKD equipment (Alice) of the system other end, Alice decays to flashlight after single photon magnitude, flashlight is back to Bob again by original optical path, and light path is a round process.On optical fiber link in whole process between two QKD equipment, only having a QKD active link, is the process of two-way (two-way), single work.
And in patent application of the present invention " duplex system " be defined as can " full duplex " system of work, every one end of duplex system has all comprised Alice and Bob, can set up two QKD links simultaneously.Weak signal light (single photon magnitude) can transfer to from the transmitting terminal Alice of QKD equipment _ L the receiving terminal Bob of QKD equipment _ R, also can transfer to from the Alice of QKD equipment _ R the Bob (Fig. 4) of QKD_L simultaneously.Like this, between the two ends QKD equipment of duplex system, can on optical fiber link, move two QKD active links, be the process of unidirectional a, full duplex simultaneously.In structure and optical signal transmission, there is very large difference in " bilateral system " of this and documents.
The Alice of duplex QKD system two ends QKD equipment can send respectively two kinds of different synchronizable optical and examination processes of wavelength and can realize by following any method:
1, all is furnished with the synchronizable optical laser of two different wave lengths at the Alice of the QKD equipment at QKD system two ends, and need to be in duplexing QKD system configuration control module, send respectively the synchronizable optical of any wavelength through the Alice of the QKD equipment at control module control QKD system two ends, the synchronizable optical sending sends to the Bob of corresponding QKD equipment in same optical fiber link, and the Bob of the QKD equipment at QKD system two ends all disposes optical filter part, optical filter part is screened among isolated synchronizable optical is sent into corresponding discriminator, control module is also being controlled signal which kind of discriminator the Bob of the QKD equipment at two ends detect respectively as synchronizing signal.
Because actual fiber chain environment is undesirable, there is fiber end face reflex, article one, on QKD active link, may there is the different synchronizable optical of two-way wavelength, the wherein synchronizable optical of a kind of synchronizable optical of wavelength and the another kind of wavelength of reflection, after optical filter part, among the corresponding discriminator of can being made a gift to someone respectively.For example, the centre frequency of optical filter part is λ
1(this centre frequency is generally fixed value) is λ when using wavelength
1synchronizable optical time, after optical filter part, send in discriminator 1 and screen; Be λ when using wavelength
2synchronizable optical time, after optical filter part, except λ
1other light signal in addition is all sent in discriminator 2 and is screened, and the noise in optical fiber link etc. disturb the examination impact of synchronizable optical very little, negligible, and therefore can correctly screen out wavelength is λ
2synchronizable optical.(process of " screening among isolated synchronizable optical is sent into corresponding discriminator " of mentioning in following content all refers to this process)
2, is all furnished with the synchronizable optical laser of two different wave lengths at the Alice of the QKD equipment at QKD system two ends, the synchronizable optical sending sends to the Bob of corresponding QKD equipment in same optical fiber link, and the Bob of the QKD equipment at QKD system two ends all disposes optical filter part, optical filter part is screened among isolated synchronizable optical is sent into corresponding discriminator, after system initial configuration, it is λ that one of them QKD equipment adopts one of them synchronizable optical laser to send wavelength
1synchronizable optical sync1, and the signal that a discriminator of correspondence is detected is as synchronizing signal, it is λ that another QKD equipment adopts a synchronizable optical laser to send wavelength
2synchronizable optical sync2, and the signal that a discriminator of correspondence is detected is as synchronizing signal.
3, Alice at the QKD equipment at QKD system two ends is all furnished with a synchronizable optical laser that wavelength is adjustable, the synchronizable optical laser that this wavelength is adjustable can send two kinds of synchronizable optical that wavelength is different, the Alice of the QKD equipment at QKD system two ends sends respectively the synchronizable optical of any wavelength and is dispatched by control module, the synchronizable optical sending sends to the Bob of corresponding QKD equipment in same optical fiber link, and the Bob of the QKD equipment at QKD system two ends all disposes optical filter part, optical filter part is screened among isolated synchronizable optical is sent into corresponding discriminator, control module is also being controlled signal which kind of discriminator the Bob of the QKD equipment at two ends detect respectively as synchronizing signal.
4, is all furnished with a synchronizable optical laser that wavelength is adjustable at the Alice of the QKD equipment at QKD system two ends, the synchronizable optical laser that this wavelength is adjustable can send two kinds of synchronizable optical that wavelength is different, the synchronizable optical sending sends to the Bob of corresponding QKD equipment in same optical fiber link, the Bob of the QKD equipment at QKD system two ends all disposes optical filter part, optical filter part is screened among isolated synchronizable optical is sent into corresponding discriminator, after system initial configuration, it is λ that the synchronizable optical laser of one of them QKD equipment sends wavelength
1synchronizable optical sync1, and the signal that a discriminator of correspondence is detected is as synchronizing signal, it is λ that the synchronizable optical laser of another QKD equipment sends wavelength
2synchronizable optical sync2, and the signal that a discriminator of correspondence is detected is as synchronizing signal.
5, is all furnished with the synchronizable optical laser of a fixed wave length at the Alice of the QKD equipment at QKD system two ends, the wavelength difference that the synchronizable optical laser at two ends sends, the synchronizable optical sending sends to the Bob of corresponding QKD equipment in same optical fiber link, and the Bob of the QKD equipment at QKD system two ends adopts corresponding discriminator to screen synchronizable optical.
The present invention also provides a kind of synchronizer of quantum key distribution system, this quantum key distribution system is duplexing QKD system, comprise the synchronizable optical laser of the Alice of the QKD equipment that is configured in respectively QKD system two ends, the synchronizable optical laser of the QKD equipment at QKD system two ends can send respectively the synchronizable optical of two kinds of different wave lengths, and the Bob of the QKD equipment at QKD system two ends all disposes discriminator, adopt corresponding discriminator to screen synchronizable optical.
Concrete apparatus structure can be following any:
1, the synchronizable optical laser of the Alice of the QKD equipment at QKD system two ends all has two, two synchronizable optical lasers can send different wavelength, and the Bob of the QKD equipment at QKD system two ends all disposes optical filter part and two kinds and can screen respectively the discriminator of two kinds of different wave lengths that synchronizable optical laser sends, and optical filter part is screened among isolated synchronizable optical is sent into corresponding discriminator.
In this kind of structure, in described duplexing QKD system, go back configuration control module, the synchronizable optical laser of the QKD equipment at control module control QKD system two ends sends respectively the synchronizable optical of any wavelength, and control module is also being controlled signal which kind of discriminator the Bob of the QKD equipment at two ends detect respectively as synchronizing signal.
Or the synchronizable optical laser of the QKD equipment at QKD system two ends sends signal which kind of discriminator the Bob of the synchronizable optical of any wavelength and the QKD equipment at two ends detect respectively as synchronizing signal, determines through system initial configuration.
2, the Alice of the QKD equipment at QKD system two ends is all furnished with a synchronizable optical laser that wavelength is adjustable, the synchronizable optical laser that this wavelength is adjustable can send two kinds of synchronizable optical that wavelength is different, and the Bob of the QKD equipment at QKD system two ends all disposes optical filter part and two kinds and can screen respectively the discriminator of two kinds of different wave lengths that synchronizable optical laser sends, and optical filter part is screened among isolated synchronizable optical is sent into corresponding discriminator.
In this kind of structure, in described duplexing QKD system, go back configuration control module, the adjustable synchronizable optical laser of wavelength of the Alice of the QKD equipment at two ends sends respectively the synchronizable optical of any wavelength and is dispatched by control module, and control module is also being controlled signal which kind of discriminator the Bob of the QKD equipment at two ends detect respectively as synchronizing signal.
Or the adjustable synchronizable optical laser of wavelength of the QKD equipment at QKD system two ends sends signal which kind of discriminator the Bob of the synchronizable optical of any wavelength and the QKD equipment at two ends detect respectively as synchronizing signal, determines through system initial configuration.
3, the synchronizable optical laser that the Alice of the QKD equipment at described QKD system two ends is furnished with is the synchronizable optical laser of a fixed wave length, the wavelength difference that the synchronizable optical laser at two ends sends, the Bob of the QKD equipment at QKD system two ends all disposes and can fix the discriminator of screening the wavelength of receiving.
The invention has the advantages that:
1, duplexing QKD system two ends adopt respectively the synchronizable optical of different wave length, have solved because synchronizable optical reflection causes the problem that duplexing QKD system can not full duplex operation;
2, according to embodiment mono-and embodiment bis-, compare original QKD system, its QKD device just is at a synchronizable optical laser of the many increases of Alice end, or the adjustable synchronizable optical laser of Alice use wavelength, reaches the function that can send two kinds of different wave lengths; Only need an optical filter part and the synchronizable optical discriminators of increasing at Bob end more.The device cost of the required increase of system equipment is lower, and structurally can realize QKD equipment _ L and the identical feature of QKD equipment _ R, reach any two QKD equipment and all can realize point to point connect and the function of communicating by letter, equipment operating is simple and convenient, is convenient to batch production;
3, according to embodiment tri-, compare original QKD system, the Alice of its QKD equipment and Bob are without increasing any new hardware, only need to be in the time that system be dispatched from the factory configuration, for the Alice of QKD equipment _ L and QKD equipment _ R configures respectively the synchronizable optical of different wave length, accordingly, for the Bob of QKD equipment _ L and QKD equipment _ R configures respectively different discriminators, QKD equipment _ L and QKD equipment _ R are produced in pairs, and equipment operating is simple and convenient, is convenient to batch production;
4, the Bob at duplexing QKD system two ends end uses optical filter part and two kinds of discriminators, is convenient to differentiate link-quality, system debug and positioning problems.For example, the Bob on Alice and QKD_R on QKD_L establishes the link, and brings into operation, if the upper Bob end of discovery QKD_L has output with the corresponding discriminator of synchronizable optical wavelength that local terminal Alice sends, illustrates on optical fiber link and exists synchronizable optical to reflect.
Brief description of the drawings
Fig. 1 is the schematic diagram of the synchronous method in prior art scheme.
Fig. 2 is unidirectional (one-way), the duplexing QKD system schematic based on the existing method of synchronization.
Fig. 3 is synchronous method scene one schematic diagram of the synchronous method of a kind of quantum key distribution system of the present invention.
Fig. 4 is duplex system schematic diagram.
Fig. 5 is the duplexing QKD system schematic based on synchronous method of the present invention.
Fig. 6 is the duplexing QKD system schematic that Alice uses the synchronizable optical laser of two different wave lengths.
Fig. 7 is the duplexing QKD system schematic that Alice uses the synchronizable optical laser of a variable wavelength.
Fig. 8 is the duplexing QKD system schematic of Alice and the Bob synchronizable optical laser that uses respectively different wave length.
Fig. 9 is synchronous method scene two schematic diagrames of the synchronous method of a kind of quantum key distribution system of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
In duplex QKD system, the transmission of flashlight and synchronizable optical has two kinds of typical scenes.Scene one (Fig. 3) is that the Alice end signal light of system two ends QKD equipment and synchronizable optical can be coupling in same optical fiber and transmit, in this case, the Bob of system two ends QKD equipment needs two-stage optical filter part and two discriminators, first order optical filter part separates flashlight with synchronizable optical, second level optical filter part is screened among isolated synchronizable optical is sent into corresponding discriminator.Scene two (Fig. 9) is that flashlight and the synchronizable optical of the Alice end of system two ends QKD equipment transmitted respectively in two optical fiber, in this case, the Bob of system two ends QKD equipment only needs one-level optical filter part and two discriminators, and optical filter part is screened among isolated synchronizable optical is sent into corresponding discriminator.
Following embodiment is all introductions of carrying out as an example of scene one example.
Fig. 3 is a schematic diagram of synchronous method scene one of the present invention, the system of the use the method shown in figure is a typical case, and not exclusive situation, this schematic diagram just sends respectively wherein a kind of process of the different synchronizable optical of two kinds of wavelength for the Alice of detailed explanation duplex QKD system two ends QKD equipment, and the Bob of two ends QKD equipment adopts optical filter part that flashlight is separated with synchronizable optical, the detailed process that adopts again corresponding discriminator to screen synchronizable optical, be mainly used to illustrate the process of optical filter part separation signal light and synchronizable optical and the selection of optical filter part.
In Fig. 3, omit the Bob end of QKD equipment _ L and the Alice end of QKD equipment _ R, only embodied the Alice end of QKD equipment _ L to the process of unidirectional synchronizable optical of the Bob end transmission of QKD equipment _ R; The process that the Alice of QKD equipment _ R sends synchronizable optical to the Bob of QKD equipment _ L is identical with it.
The Alice of QKD equipment _ L contains multiple flashlight lasers and two synchronizable optical lasers, and synchronizable optical laser 1 can send respectively two kinds of synchronizable optical λ that wavelength is different with 2
1and λ
2.The Alice choice for use of QKD equipment _ L is a kind of wavelength (λ wherein
1or λ
2) synchronizable optical, for example selecting wavelength is λ
1synchronizable optical, i.e. the central wavelength lambda of synchronizable optical
sync=λ
1, with N road centre wavelength be λ
signalflashlight be coupling in the Bob that sends to QKD equipment _ R in same optical fiber link.Correspondingly, the Alice of QKD equipment _ R (not shown in Fig. 3) choice for use wavelength is λ
2synchronizable optical.
The Bob of QKD equipment _ R uses first order optical filter part to isolate flashlight, re-uses second level optical filter part and isolates synchronizable optical.Preferably, first order optical filter part can be selected dense wavelength division multiplexing (Dense Wavelength Division Multiplexing, DWDM) device, and its centre wavelength is λ
signal.Flashlight and synchronizable optical, after DWDM device, are isolated flashlight according to centre wavelength, carry out flashlight subsequent treatment; Second level optical filter part is sent in synchronizable optical signal unification except flashlight.Preferably, second level optical filter part can be selected DWDM device, and its centre wavelength is λ
1or λ
2, separable go out two kinds of synchronizable optical that wavelength is different, be λ by wavelength
1synchronizable optical send in discriminator 1, be λ by wavelength
2synchronizable optical send in discriminator 2, to screen synchronizable optical.The signal screening out from discriminator 1 or discriminator 2 as synchronizing signal (in this example is and λ
1corresponding synchronizing signal), for flashlight subsequent processes.
In the duplexing QKD system configuration based on synchronous method described in Fig. 3, every QKD equipment all comprises transmitting terminal Alice and receiving terminal Bob, can carry out full duplex work, can transmitting two paths synchronizable optical in optical fiber link, as shown in Figure 4.The Alice of duplex system two ends QKD equipment all contains the laser that can send two kinds of different wave length synchronizable optical, the Bob of two ends QKD equipment all contains two-stage optical filter part, first order optical filter part separable go out flashlight and synchronizable optical, second level optical filter part is screened among isolated synchronizable optical is sent into corresponding discriminator.
The described duplexing QKD system based on this method of synchronization, can also comprise a upper strata control module, and as shown in Figure 5, the major function of this control module is to control the synchronizable optical that uses which wavelength on QKD link.When a link selection wavelength is λ
1synchronizable optical sync1 time, an other link uses wavelength for λ
2synchronizable optical sync2.Control module can realize by software, also can pass through the hardware such as single-chip microcomputer, FPGA, DSP and realize.
Duplexing QKD system of the present invention, its structure as shown in Figure 5, QKD equipment _ L and QKD equipment _ R all comprise Alice and Bob, between two equipment, can set up two QKD links simultaneously, be the link between the Alice of QKD equipment _ L and the Bob of QKD equipment _ R, and link between the Alice of QKD equipment _ R and the Bob of QKD equipment _ L.Whole duplexing QKD system is used full-duplex mode work.The feature of duplex QKD system is, article two, on QKD link, use the synchronizable optical of different wave length, while having avoided the synchronous light wavelength that uses when two links identical, article one, link synchronization reflection of light light can disturb the problem of the normal examination of another link synchronization light, solve two problems that QKD link can not move simultaneously, realized the full duplex function of QKD system.
The Alice of QKD equipment _ L and QKD equipment _ R contains the synchronizable optical laser that can send two kinds of different wave lengths, can be also the synchronizable optical laser that the Alice of QKD equipment _ L and QKD equipment _ R uses respectively different wave length.If the Alice of QKD equipment _ L and QKD equipment _ R is the first situation, the Bob of QKD equipment _ L and QKD equipment _ R all contains two-stage optical filter part, the synchronizable optical of separable flashlight and two kinds of different wave lengths; If the Alice of QKD equipment _ L and QKD equipment _ R is the second situation, the Bob of QKD equipment _ L and QKD equipment _ R only contains one-level optical filter part, separable flashlight and synchronizable optical.
In described duplexing QKD system, the synchronizable optical laser of the Alice of QKD equipment _ L and QKD equipment _ R can comprise but be not limited to following several form:
Embodiment mono-(using the synchronizable optical laser of two different wave lengths)
option1 (the synchronous light wavelength that Alice sends is determined by control module):
As shown in Figure 6, the Alice of QKD equipment _ L and QKD equipment _ R all disposes two synchronizable optical lasers---synchronizable optical laser 1 and synchronizable optical laser 2, and wherein synchronizable optical laser 1 sends synchronizable optical sync1 regularly, and wavelength is λ
1, synchronizable optical laser 2 sends synchronizable optical sync2 regularly, and wavelength is λ
2, and λ
1≠ λ
2.The Bob of QKD equipment _ L and QKD equipment _ R all disposes two-stage optical filter part, first order optical filter part separable go out flashlight and synchronizable optical, second level optical filter part separable go out the different synchronizable optical of two-way wavelength, as shown in Figure 3.Second level optical filter part is sent into isolated two-way synchronizable optical respectively among corresponding discriminator, and discriminator 1 regularly screening center's wavelength is λ
1synchronizable optical sync1, discriminator 2 regularly screening center's wavelength is λ
2synchronizable optical sync2.
In described duplexing QKD system, dispose control module, send respectively the different synchronizable optical sync1 of wavelength and sync2 in order to control QKD equipment _ L with QKD equipment _ R; Meanwhile, the synchronizable optical that corresponding Alice sends, control module is also being controlled signal which kind of discriminator the Bob of QKD equipment _ L and QKD equipment _ R detect respectively as synchronizing signal.
Specifically be implemented as follows: on the link between the Alice of QKD equipment _ L and the Bob of QKD equipment _ R, the Alice of control module scheduling QKD equipment _ L uses synchronizable optical laser 1, and transmission wavelength is λ
1synchronizable optical sync1; , at the Bob of QKD equipment _ R end, isolate flashlight by first order optical filter part, then isolate synchronizable optical sync1 by second level optical filter part.Through control module scheduling, the signal that discriminator 1 is detected is as synchronizing signal.
Accordingly, on the link between the Alice of QKD equipment _ R and the Bob of QKD equipment _ L, the Alice of control module scheduling QKD equipment _ R uses synchronizable optical laser 2, and transmission wavelength is λ
2synchronizable optical sync2; , at the Bob of QKD equipment _ L end, isolate flashlight by first order optical filter part, then isolate synchronizable optical sync2 by second level optical filter part.Through control module scheduling, the signal that discriminator 2 is detected is as synchronizing signal.
Use the benefit of control module to be, in the time of synchronously the going wrong of a certain QKD link, for example occur abnormal for synchronizable optical laser or the discriminator of this QKD link, can dispatch switching to the synchronizable optical laser in the QKD equipment of two ends and discriminator easily by control module, full duplex QKD system still can normally be worked.For example, if synchronizable optical laser 1 operation irregularity that the Alice of QKD equipment _ L uses, the Alice of control module scheduling QKD equipment _ L uses synchronizable optical laser 2, and the signal that the Bob of scheduling QKD equipment _ R detects discriminator 2 is as synchronizing signal; Meanwhile, the Alice of control module scheduling QKD equipment _ R uses synchronizable optical laser 1, and the signal that the Bob of scheduling QKD equipment _ L detects discriminator 1 is as synchronizing signal.
option2 (the synchronous light wavelength that Alice sends is by initial configuration):
The Alice of QKD equipment _ L and QKD equipment _ R all disposes two synchronizable optical lasers---synchronizable optical laser 1 and synchronizable optical laser 2.Synchronizable optical laser 1 sends synchronizable optical sync1 regularly, and wavelength is λ
1; Synchronizable optical laser 2 sends synchronizable optical sync2 regularly, and wavelength is λ
2, and λ
1≠ λ
2.
The Bob of QKD equipment _ L and QKD equipment _ R all disposes two-stage optical filter part, first order optical filter part separable go out flashlight, second level optical filter part separable go out two kinds of synchronizable optical that wavelength is different, as shown in Figure 3.Second level optical filter part is sent into isolated two-way synchronizable optical respectively among corresponding discriminator, and discriminator 1 regularly screening center's wavelength is λ
1synchronizable optical sync1, discriminator 2 regularly screening center's wavelength is λ
2synchronizable optical sync2.
After system initial configuration, QKD equipment _ L adopts synchronizable optical laser 1 to send synchronizable optical sync1, and the signal that discriminator 2 is detected is as synchronizing signal; QKD equipment _ R adopts synchronizable optical laser 2 to send synchronizable optical sync2, and the signal that discriminator 1 is detected is as synchronizing signal.
In the time of synchronously the going wrong of a certain QKD link, for example occur abnormal for synchronizable optical laser or the discriminator of this QKD link, can be by modes such as system reinitialize, synchronizable optical laser in the QKD equipment of two ends and discriminator are dispatched to switching, full duplex QKD system still can normally be worked.For example, if synchronizable optical laser 1 operation irregularity that the Alice of QKD equipment _ L uses, duplexing QKD system is re-started to initialization, in the time of initial configuration, the Alice of configuration QKD equipment _ L uses synchronizable optical laser 2, and the signal that the Bob of configuration QKD equipment _ R detects discriminator 2 is as synchronizing signal; Meanwhile, the Alice of configuration QKD equipment _ R uses synchronizable optical laser 1, and the signal that the Bob of configuration QKD equipment _ L detects discriminator 1 is as synchronizing signal.
Embodiment bis-(using the synchronizable optical laser of a variable wavelength)
option1 (the synchronous light wavelength that Alice sends is determined by control module):
As shown in Figure 7, the Alice of QKD equipment _ L and QKD equipment _ R all uses a synchronizable optical laser that wavelength is adjustable, and the synchronizable optical laser that this wavelength is adjustable can send synchronizable optical sync1, and wavelength is λ
1, also can send synchronizable optical sync2, wavelength is λ
2, and λ
1≠ λ
2, it sends synchronous light wavelength and is dispatched by control module.The Bob of QKD equipment _ L and QKD equipment _ R all disposes two-stage optical filter part, first order optical filter part separable go out flashlight and synchronizable optical, second level optical filter part separable go out the synchronizable optical of different wave length, as shown in Figure 3.Isolated two-way synchronizable optical is sent into respectively among corresponding discriminator, and it is λ that discriminator 1 is screened wavelength regularly
1synchronizable optical sync1, it is λ that discriminator 2 is screened wavelength regularly
2synchronizable optical sync2.
In described duplexing QKD system, dispose control module, in order to control the Alice of QKD equipment _ L and the Alice of QKD equipment _ R sends respectively the different synchronizable optical sync1 of wavelength and sync2.Meanwhile, the synchronizable optical that corresponding Alice sends, control module is also being controlled signal which kind of discriminator the Bob of QKD equipment _ L and QKD equipment _ R detect respectively as synchronizing signal.
Specifically be implemented as follows: on the link between the Alice of QKD equipment _ L and the Bob of QKD equipment _ R, the Alice of control module scheduling QKD equipment _ L uses the adjustable synchronizable optical laser of wavelength, and transmission wavelength is λ
1synchronizable optical sync1; , at the Bob of QKD equipment _ R end, isolate flashlight by first order optical filter part, then isolate synchronizable optical sync1 by second level optical filter part.Through control module scheduling, the signal that discriminator 1 is detected is as synchronizing signal.
Accordingly, on the link between the Alice of QKD equipment _ R and the Bob of QKD equipment _ L, the Alice of control module scheduling QKD equipment _ R uses the adjustable synchronizable optical laser of wavelength, and transmission wavelength is λ
2synchronizable optical sync2; , at the Bob of QKD equipment _ L end, isolate flashlight by first order optical filter part, then isolate synchronizable optical sync2 by second level optical filter part.Through control module scheduling, the signal that discriminator 2 is detected is as synchronizing signal.
option2 (the synchronous light wavelength that Alice sends is by initial configuration):
The Alice of QKD equipment _ L and QKD equipment _ R all uses a synchronizable optical laser that wavelength is adjustable, and the synchronizable optical laser that this wavelength is adjustable can send synchronizable optical sync1, and wavelength is λ
1, also can send synchronizable optical sync2, wavelength is λ
2, and λ
1≠ λ
2.
The Bob of QKD equipment _ L and QKD equipment _ R all disposes two-stage optical filter part, first order optical filter part separable go out flashlight and synchronizable optical, second level optical filter part separable go out the synchronizable optical of two kinds of different wave lengths, as shown in Figure 3.Isolated two-way synchronizable optical is sent into respectively among corresponding discriminator, and discriminator 1 regularly screening center's wavelength is λ
1synchronizable optical sync1, discriminator 2 regularly screening center's wavelength is λ
2synchronizable optical sync2.
In the time of system initial configuration, it is λ that configurable QKD equipment _ L sends wavelength
1synchronizable optical sync1, and the signal that discriminator 2 is detected is as synchronizing signal; It is λ that configuration QKD equipment _ R sends wavelength
2synchronizable optical sync2, and the signal that discriminator 1 is detected is as synchronizing signal.
Embodiment tri-(system two ends are used respectively the synchronizable optical laser of a different wave length)
As shown in Figure 8, QKD equipment _ L and QKD equipment _ R use respectively the synchronizable optical laser of a different wave length, and it is λ that synchronizable optical laser 1 sends wavelength regularly
1synchronizable optical sync1, it is λ that synchronizable optical laser 2 sends wavelength regularly
2synchronizable optical sync2, and λ
1≠ λ
2.The Bob of QKD equipment _ L and QKD equipment _ R all adopts one-level optical filter part, in order to isolate flashlight and synchronizable optical.The synchronizable optical of after separating is sent in discriminator, and discriminator 1 regularly screening center's wavelength is λ
1synchronizable optical sync1, discriminator 2 regularly screening center's wavelength is λ
2synchronizable optical sync2.
Specifically be implemented as follows: on the link between the Alice of QKD equipment _ L and the Bob of QKD equipment _ R, the Alice of QKD equipment _ L uses synchronizable optical laser 1, and sending regularly wavelength is λ
1synchronizable optical sync1,, at the Bob end of QKD equipment _ R, after one-level optical filter part is isolated synchronizable optical, carrying out screening center's wavelength with discriminator 1 is λ
1synchronizable optical sync1.Accordingly, on the link between the Alice of QKD equipment _ R and the Bob of QKD equipment _ L, the Alice of QKD equipment _ R uses synchronizable optical laser 2, and sending regularly wavelength is λ
2synchronizable optical sync2,, at the Bob end of QKD equipment _ L, after one-level optical filter part is isolated synchronizable optical, carrying out screening center's wavelength with discriminator 2 is λ
2synchronizable optical sync2.
Fig. 9 is a schematic diagram of synchronous method Scene two of the present invention.The system of the use the method shown in Fig. 9 is a typical case, and not exclusive situation.In Fig. 9, omit the Bob end of QKD equipment _ L and the Alice end of QKD equipment _ R, only embodied the Alice end of QKD equipment _ L to the process of unidirectional synchronizable optical of the Bob end transmission of QKD equipment _ R; The process that the Alice of QKD equipment _ R sends synchronizable optical to the Bob of QKD equipment _ L is identical with it.
Flashlight shown in scene two and synchronizable optical are used respectively the transmission of two optical fiber links, are equally applicable to several situations described in the embodiment mono-, two, three in the present invention.
The foregoing is only the preferred embodiment of the invention; not in order to limit the invention; any amendment of doing within all spirit in the invention and principle, be equal to and replace and improvement etc., within all should being included in the protection range of the invention.
Claims (14)
1. the synchronous method of a quantum key distribution system, this quantum key distribution system is duplexing QKD system, it is characterized in that: the Alice of duplexing QKD system two ends QKD equipment can send respectively two kinds of synchronizable optical that wavelength is different, the synchronizable optical sending is transmitted in same optical fiber link, while making to move two QKD links on optical fiber link simultaneously, article two, the synchronizable optical wavelength difference on link, the Bob of two ends QKD equipment adopts corresponding discriminator to screen synchronizable optical.
2. the synchronous method of quantum key distribution system according to claim 1, it is characterized in that: described synchronous method specifically comprises: the synchronizable optical laser of being all furnished with two different wave lengths at the Alice of the QKD equipment at QKD system two ends, and in duplexing QKD system configuration control module, send respectively the synchronizable optical of any wavelength through the Alice of the QKD equipment at control module control QKD system two ends, the synchronizable optical sending sends to the Bob of corresponding QKD equipment in same optical fiber link, and the Bob of the QKD equipment at QKD system two ends all disposes optical filter part, optical filter part is screened among isolated synchronizable optical is sent into corresponding discriminator, control module is also being controlled signal which kind of discriminator the Bob of the QKD equipment at two ends detect respectively as synchronizing signal.
3. the synchronous method of quantum key distribution system according to claim 1, it is characterized in that: described synchronous method specifically comprises: the synchronizable optical laser of being all furnished with two different wave lengths at the Alice of the QKD equipment at QKD system two ends, the synchronizable optical sending sends to the Bob of corresponding QKD equipment in same optical fiber link, and the Bob of the QKD equipment at QKD system two ends all disposes optical filter part, optical filter part is screened among isolated synchronizable optical is sent into corresponding discriminator, after system initial configuration, it is λ that one of them QKD equipment adopts one of them synchronizable optical laser to send wavelength
1synchronizable optical sync1, and the signal that a discriminator of correspondence is detected is as synchronizing signal, it is λ that another QKD equipment adopts a synchronizable optical laser to send wavelength
2synchronizable optical sync2, and the signal that a discriminator of correspondence is detected is as synchronizing signal.
4. the synchronous method of quantum key distribution system according to claim 1, it is characterized in that: described synchronous method specifically comprises: the Alice at the QKD equipment at QKD system two ends is all furnished with a synchronizable optical laser that wavelength is adjustable, the synchronizable optical laser that this wavelength is adjustable can send two kinds of synchronizable optical that wavelength is different, the Alice of the QKD equipment at QKD system two ends sends respectively the synchronizable optical of any wavelength and is dispatched by control module, the synchronizable optical sending sends to the Bob of corresponding QKD equipment in same optical fiber link, and the Bob of the QKD equipment at QKD system two ends all disposes optical filter part, optical filter part is screened among isolated synchronizable optical is sent into corresponding discriminator, control module is also being controlled signal which kind of discriminator the Bob of the QKD equipment at two ends detect respectively as synchronizing signal.
5. the synchronous method of quantum key distribution system according to claim 1, it is characterized in that: described synchronous method specifically comprises: the Alice at the QKD equipment at QKD system two ends is all furnished with a synchronizable optical laser that wavelength is adjustable, the synchronizable optical laser that this wavelength is adjustable can send two kinds of synchronizable optical that wavelength is different, the synchronizable optical sending sends to the Bob of corresponding QKD equipment in same optical fiber link, the Bob of the QKD equipment at QKD system two ends all disposes optical filter part, optical filter part is screened among isolated synchronizable optical is sent into corresponding discriminator, after system initial configuration, it is λ that the synchronizable optical laser of one of them QKD equipment sends wavelength
1synchronizable optical sync1, and the signal that a discriminator of correspondence is detected is as synchronizing signal, it is λ that the synchronizable optical laser of another QKD equipment sends wavelength
2synchronizable optical sync2, and the signal that a discriminator of correspondence is detected is as synchronizing signal.
6. the synchronous method of quantum key distribution system according to claim 1, it is characterized in that: described synchronous method specifically comprises: the synchronizable optical laser of being all furnished with a fixed wave length at the Alice of the QKD equipment at QKD system two ends, the wavelength difference that the synchronizable optical laser at two ends sends, the synchronizable optical sending sends to the Bob of corresponding QKD equipment in same optical fiber link, and the Bob of the QKD equipment at QKD system two ends adopts corresponding discriminator to screen synchronizable optical.
7. the synchronizer of a quantum key distribution system, this quantum key distribution system is duplexing QKD system, it is characterized in that: the synchronizable optical laser that comprises the Alice of the QKD equipment that is configured in respectively QKD system two ends, the synchronizable optical laser of the QKD equipment at QKD system two ends can send respectively the synchronizable optical of two kinds of different wave lengths, and the Bob of the QKD equipment at QKD system two ends all disposes discriminator, adopt corresponding discriminator to screen synchronizable optical.
8. the synchronizer of quantum key distribution system as claimed in claim 7, it is characterized in that: the synchronizable optical laser of the Alice of the QKD equipment at QKD system two ends all has two, two synchronizable optical lasers can send different wavelength, and the Bob of the QKD equipment at QKD system two ends all disposes optical filter part and two kinds and can screen respectively the discriminator of two kinds of different wave lengths that synchronizable optical laser sends, and optical filter part is screened among isolated synchronizable optical is sent into corresponding discriminator.
9. the synchronizer of quantum key distribution system as claimed in claim 8, it is characterized in that: in described duplexing QKD system, go back configuration control module, the synchronizable optical laser of the QKD equipment at control module control QKD system two ends sends respectively the synchronizable optical of any wavelength, and control module is also being controlled signal which kind of discriminator the Bob of the QKD equipment at two ends detect respectively as synchronizing signal.
10. the synchronizer of quantum key distribution system as claimed in claim 8, it is characterized in that: the synchronizable optical laser of the QKD equipment at QKD system two ends sends signal which kind of discriminator the Bob of the synchronizable optical of any wavelength and the QKD equipment at two ends detect respectively as synchronizing signal, determines through system initial configuration.
The synchronizer of 11. quantum key distribution systems as claimed in claim 7, it is characterized in that: the Alice of the QKD equipment at QKD system two ends is all furnished with a synchronizable optical laser that wavelength is adjustable, the synchronizable optical laser that this wavelength is adjustable can send two kinds of synchronizable optical that wavelength is different, and the Bob of the QKD equipment at QKD system two ends all disposes optical filter part and two kinds and can screen respectively the discriminator of two kinds of different wave lengths that synchronizable optical laser sends, and optical filter part is screened among isolated synchronizable optical is sent into corresponding discriminator.
The synchronizer of 12. quantum key distribution systems as claimed in claim 11, it is characterized in that: in described duplexing QKD system, go back configuration control module, the adjustable synchronizable optical laser of wavelength of the Alice of the QKD equipment at two ends sends respectively the synchronizable optical of any wavelength and is dispatched by control module, and control module is also being controlled signal which kind of discriminator the Bob of the QKD equipment at two ends detect respectively as synchronizing signal.
The synchronizer of 13. quantum key distribution systems as claimed in claim 11, it is characterized in that: the adjustable synchronizable optical laser of wavelength of the QKD equipment at QKD system two ends sends signal which kind of discriminator the Bob of the synchronizable optical of any wavelength and the QKD equipment at two ends detect respectively as synchronizing signal, determines through system initial configuration.
The synchronizer of 14. quantum key distribution systems as claimed in claim 7, it is characterized in that: the synchronizable optical laser that the Alice of the QKD equipment at described QKD system two ends is furnished with is the synchronizable optical laser of a fixed wave length, the wavelength difference that the synchronizable optical laser at two ends sends, the Bob of the QKD equipment at QKD system two ends all disposes and can fix the discriminator of screening the wavelength of receiving.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711284142.5A CN107947926B (en) | 2014-09-16 | 2014-09-16 | Synchronization method and device of quantum key distribution system |
| CN201410472681.1A CN104202157B (en) | 2014-09-16 | 2014-09-16 | The synchronous method and device of a kind of quantum key distribution system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410472681.1A CN104202157B (en) | 2014-09-16 | 2014-09-16 | The synchronous method and device of a kind of quantum key distribution system |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711284142.5A Division CN107947926B (en) | 2014-09-16 | 2014-09-16 | Synchronization method and device of quantum key distribution system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104202157A true CN104202157A (en) | 2014-12-10 |
| CN104202157B CN104202157B (en) | 2018-01-02 |
Family
ID=52087387
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410472681.1A Active CN104202157B (en) | 2014-09-16 | 2014-09-16 | The synchronous method and device of a kind of quantum key distribution system |
| CN201711284142.5A Active CN107947926B (en) | 2014-09-16 | 2014-09-16 | Synchronization method and device of quantum key distribution system |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711284142.5A Active CN107947926B (en) | 2014-09-16 | 2014-09-16 | Synchronization method and device of quantum key distribution system |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN104202157B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106161010A (en) * | 2016-08-19 | 2016-11-23 | 浙江神州量子网络科技有限公司 | The high one-tenth point-to-point QKD system of code check and transmitting terminal, receiving terminal and QKD method |
| CN106470101A (en) * | 2015-08-18 | 2017-03-01 | 阿里巴巴集团控股有限公司 | For the identity identifying method of quantum key distribution process, apparatus and system |
| CN107733637A (en) * | 2016-08-12 | 2018-02-23 | 上海国盾量子信息技术有限公司 | The quantum key distribution device used in duplexing quantum key distribution system |
| CN107733638A (en) * | 2016-08-12 | 2018-02-23 | 上海国盾量子信息技术有限公司 | Duplexing quantum key distribution system and synchronous method |
| CN108206716A (en) * | 2016-12-20 | 2018-06-26 | 科大国盾量子技术股份有限公司 | Synchronous method and device and dissemination system applied to quantum key distribution system |
| EP3329638A4 (en) * | 2015-07-31 | 2019-02-20 | Alibaba Group Holding Limited | Authentication method, device and system for quantum key distribution process |
| CN110546915A (en) * | 2017-01-23 | 2019-12-06 | 约翰内斯堡金山大学 | Method and system for hybrid classical quantum communication |
| CN110651316A (en) * | 2017-03-17 | 2020-01-03 | 量子基础有限公司 | Optical reading of security elements |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114268421B (en) * | 2021-12-17 | 2024-04-19 | 安徽问天量子科技股份有限公司 | Method for transmitting synchronous signal of single-fiber QKD system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070258592A1 (en) * | 2004-09-07 | 2007-11-08 | Magio Technoligies, Inc. | Systems and Methods for Multiplexing Qkd Channels |
| CN101204034A (en) * | 2005-09-19 | 2008-06-18 | 香港中文大学 | System and method for quantum key distribution over WDM links |
| CN101800636A (en) * | 2010-02-04 | 2010-08-11 | 安徽量子通信技术有限公司 | Synchronizer and synchronization method for quantum key distribution |
| CN101814988A (en) * | 2010-02-04 | 2010-08-25 | 安徽量子通信技术有限公司 | Two-way quantum key generating and receiving device and generating and receiving method thereof |
| CN201830272U (en) * | 2010-09-17 | 2011-05-11 | 安徽问天量子科技股份有限公司 | Network encryption machine based on quantum keys |
| CN103414553A (en) * | 2013-07-29 | 2013-11-27 | 南京发艾博光电科技有限公司 | Quantum key distribution system and method based on time-slot mixed active polarization compensation |
| CN103840905A (en) * | 2014-02-20 | 2014-06-04 | 安徽问天量子科技股份有限公司 | Full optical fiber communication system and method of QKD system |
| CN203813797U (en) * | 2014-02-20 | 2014-09-03 | 安徽问天量子科技股份有限公司 | An all-fiber communication system of a quantum key distribution system |
| CN204231375U (en) * | 2014-09-16 | 2015-03-25 | 安徽量子通信技术有限公司 | A kind of synchronizer of quantum key distribution system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060023885A1 (en) * | 2004-07-28 | 2006-02-02 | Alexei Trifonov | Two-way QKD system with backscattering suppression |
| US8311221B2 (en) * | 2008-01-15 | 2012-11-13 | At&T Intellectual Property Ii, L.P. | Architecture for reconfigurable quantum key distribution networks based on entangled photons directed by a wavelength selective switch |
| GB0801395D0 (en) * | 2008-01-25 | 2008-03-05 | Qinetiq Ltd | Network having quantum key distribution |
| US8855316B2 (en) * | 2008-01-25 | 2014-10-07 | Qinetiq Limited | Quantum cryptography apparatus |
| CN102237637B (en) * | 2010-05-05 | 2013-03-20 | 清华大学 | Reconstruction equivalent chirp (REC) double-wavelength laser for all-optical clock recovery |
| CN102868524B (en) * | 2012-09-28 | 2015-06-03 | 电子科技大学 | DPS QKD (differential phase shift quantum key distribution) encryption system suitable for GPON (gigabit passive optical network) system |
| CN103929251B (en) * | 2014-04-22 | 2017-05-24 | 华南师范大学 | Low noise QKD and WDM classic communication network compatible method and device |
-
2014
- 2014-09-16 CN CN201410472681.1A patent/CN104202157B/en active Active
- 2014-09-16 CN CN201711284142.5A patent/CN107947926B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070258592A1 (en) * | 2004-09-07 | 2007-11-08 | Magio Technoligies, Inc. | Systems and Methods for Multiplexing Qkd Channels |
| CN101204034A (en) * | 2005-09-19 | 2008-06-18 | 香港中文大学 | System and method for quantum key distribution over WDM links |
| CN101800636A (en) * | 2010-02-04 | 2010-08-11 | 安徽量子通信技术有限公司 | Synchronizer and synchronization method for quantum key distribution |
| CN101814988A (en) * | 2010-02-04 | 2010-08-25 | 安徽量子通信技术有限公司 | Two-way quantum key generating and receiving device and generating and receiving method thereof |
| CN201830272U (en) * | 2010-09-17 | 2011-05-11 | 安徽问天量子科技股份有限公司 | Network encryption machine based on quantum keys |
| CN103414553A (en) * | 2013-07-29 | 2013-11-27 | 南京发艾博光电科技有限公司 | Quantum key distribution system and method based on time-slot mixed active polarization compensation |
| CN103840905A (en) * | 2014-02-20 | 2014-06-04 | 安徽问天量子科技股份有限公司 | Full optical fiber communication system and method of QKD system |
| CN203813797U (en) * | 2014-02-20 | 2014-09-03 | 安徽问天量子科技股份有限公司 | An all-fiber communication system of a quantum key distribution system |
| CN204231375U (en) * | 2014-09-16 | 2015-03-25 | 安徽量子通信技术有限公司 | A kind of synchronizer of quantum key distribution system |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3329638A4 (en) * | 2015-07-31 | 2019-02-20 | Alibaba Group Holding Limited | Authentication method, device and system for quantum key distribution process |
| US10999068B2 (en) | 2015-07-31 | 2021-05-04 | Alibaba Group Holding Limited | Authentication method, device and system for quantum key distribution process |
| CN106470101A (en) * | 2015-08-18 | 2017-03-01 | 阿里巴巴集团控股有限公司 | For the identity identifying method of quantum key distribution process, apparatus and system |
| CN106470101B (en) * | 2015-08-18 | 2020-03-10 | 阿里巴巴集团控股有限公司 | Identity authentication method, device and system for quantum key distribution process |
| CN107733638A (en) * | 2016-08-12 | 2018-02-23 | 上海国盾量子信息技术有限公司 | Duplexing quantum key distribution system and synchronous method |
| CN107733637A (en) * | 2016-08-12 | 2018-02-23 | 上海国盾量子信息技术有限公司 | The quantum key distribution device used in duplexing quantum key distribution system |
| CN107733638B (en) * | 2016-08-12 | 2024-02-02 | 上海国盾量子信息技术有限公司 | Duplex quantum key distribution system and synchronization method |
| CN107733637B (en) * | 2016-08-12 | 2024-02-09 | 上海国盾量子信息技术有限公司 | Quantum key distribution device used in duplex quantum key distribution system |
| CN106161010A (en) * | 2016-08-19 | 2016-11-23 | 浙江神州量子网络科技有限公司 | The high one-tenth point-to-point QKD system of code check and transmitting terminal, receiving terminal and QKD method |
| CN108206716A (en) * | 2016-12-20 | 2018-06-26 | 科大国盾量子技术股份有限公司 | Synchronous method and device and dissemination system applied to quantum key distribution system |
| CN110546915A (en) * | 2017-01-23 | 2019-12-06 | 约翰内斯堡金山大学 | Method and system for hybrid classical quantum communication |
| CN110546915B (en) * | 2017-01-23 | 2022-10-04 | 约翰内斯堡金山大学 | Method and system for hybrid classical quantum communication |
| CN110651316A (en) * | 2017-03-17 | 2020-01-03 | 量子基础有限公司 | Optical reading of security elements |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104202157B (en) | 2018-01-02 |
| CN107947926A (en) | 2018-04-20 |
| CN107947926B (en) | 2021-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104202157A (en) | Quantum key distribution (QKD) system synchronization method and device | |
| CN106161010B (en) | High-bit-rate point-to-point QKD system, transmitting end, receiving end and QKD method | |
| US20190379463A1 (en) | Quantum communication network | |
| CN103414553B (en) | The quantum key distribution system compensated based on time slot interleaving active polarization and method | |
| JP5492255B2 (en) | Quantum communication system | |
| CN108650091B (en) | Phase decoding method, phase decoding receiving device and quantum key distribution system | |
| Guan et al. | Observation of quantum fingerprinting beating the classical limit | |
| CN100403152C (en) | Two-way QKD system with backscattering suppression | |
| JP2017130932A (en) | Communication system and method | |
| CN109600221A (en) | A kind of QTTH system and transmission method based on multi-core optical fiber mode division multiplexing | |
| CN108206740A (en) | Enhance the device and method that the privacy key rate on the quantum channel in QKD exchanges | |
| US7809143B2 (en) | QKD system with synchronization channel verification | |
| CN107566041B (en) | QKD metropolitan area network system based on Sagnac ring and key distribution method thereof | |
| CN108737074B (en) | Information synchronization method and device | |
| CN108206716A (en) | Synchronous method and device and dissemination system applied to quantum key distribution system | |
| CN106992835A (en) | The construction method of mode division multiplexing optical fiber telecommunications system and the optical fiber telecommunications system of structure | |
| CN107579820B (en) | Synchronization device and synchronization method for multi-channel quantum key distribution system | |
| Park et al. | User-independent optical path length compensation scheme with sub-nanosecond timing resolution for a 1× N quantum key distribution network system | |
| CN110247755A (en) | A kind of attack apparatus for demonstrating and attack demenstration method | |
| CN106100837A (en) | The synchronizer of full duplex quantum key distribution system based on phase co-wavelength and method | |
| CN109274491A (en) | Multi-user quantum key distribution network device and method | |
| CN204231375U (en) | A kind of synchronizer of quantum key distribution system | |
| CN111756526B (en) | Quantum key distribution system, transmitting end, receiving end and communication method thereof | |
| CN206060783U (en) | Quantum key distribution device used in duplexing quantum key distribution system | |
| CN107733638B (en) | Duplex quantum key distribution system and synchronization method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 230001, D3 building, Hefei Innovation Industrial Park, 800 Wangjiang West Road, Hefei hi tech Zone, Anhui Applicant after: QUANTUM COMMUNICATION TECHNOLOGY CO., LTD. Address before: 230001, D3 building, Hefei Innovation Industrial Park, 800 Wangjiang West Road, Hefei hi tech Zone, Anhui Applicant before: Anhui Liangzi Communication Technology Co., Ltd. |
|
| COR | Change of bibliographic data | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |