CN101599826A - Expandable multi-user quantum key distribution network system and method for distributing key thereof - Google Patents
Expandable multi-user quantum key distribution network system and method for distributing key thereof Download PDFInfo
- Publication number
- CN101599826A CN101599826A CNA2009100232826A CN200910023282A CN101599826A CN 101599826 A CN101599826 A CN 101599826A CN A2009100232826 A CNA2009100232826 A CN A2009100232826A CN 200910023282 A CN200910023282 A CN 200910023282A CN 101599826 A CN101599826 A CN 101599826A
- Authority
- CN
- China
- Prior art keywords
- quantum
- quantum key
- key
- transmitting terminal
- bobj
- 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
Images
Landscapes
- Optical Communication System (AREA)
Abstract
The invention discloses a kind of expandable multi-user quantum key distribution network system and method for distributing key thereof, its system comprises that the point of being made up of quantum key transmitting terminal and a plurality of quantum key receiving terminal is to the multiple spot quantum key dispatching system.Its method for distributing key step is: one, the quantum key transmitting terminal promptly the side of emission and a plurality of quantum key receiving terminals be that the recipient carries out quantum-key distribution, all shared one section random quantity sub-key between emission side and each recipient; Two, any two receive direction emission sides send request, emission side relatively and with comparative result tells two recipients by turn with two sections quantum keys that itself and two recipients share, and two recipients can release the shared quantum key of the other side and emission side in conjunction with own quantum key and the comparative results of sharing with emission side.The present invention is reasonable in design, use is easy to operate and the user capacity extended capability is strong, long transmission distance, user function are good, all can carry out key between any two legal recipients and share.
Description
Technical field
The invention belongs to the quantum-key distribution technical field, especially relate to a kind of expandable multi-user quantum key distribution network system and method for distributing key thereof.
Background technology
Quantum-key distribution provides the random sequence that is perfectly safe for strange land legitimate correspondence both sides, is referred to as quantum key usually, and the fail safe of quantum key is proved to be to be perfectly safe in theory, even the appearance of quantum computer does not constitute a threat to it yet.This is because single quantum state comes transmission information as information carrier, is referred to as quantum bit usually, and the fail safe of this quantum bit can not cloning theorem be guaranteed by uncertainty principle in the quantum mechanics and unknown quantum state.Therefore.This quantum key that is perfectly safe will at first be applied to fields such as military affairs, national security, and become the new battlefield that the various countries scientist contends.
Quantum-key distribution technology between " point-to-point " has obtained extensive studies.Along with the constantly development of network technology ground, quantum-key distribution and classical communication network system are fused into mutually for new goal in research, and the quantum key distribution network system between the multi-user becomes present research focus simultaneously.The validated user that the quantum-key distribution network can be in the network provides quantum key.But because the uniqueness of quantum bit, the route technology of quantum-key distribution is different with the implementation of classical communication in the network enabled, so the quantum route technology becomes the key technology in the quantum-key distribution network.
At present, the route characteristics according to the quantum-key distribution network are divided three classes it: the first kind, trusted parties are that node carries out route; Second class, optics are that node carries out route; The 3rd class, quantum repeater are that node carries out route.
Wherein, trusted parties is that node carries out route, come down to utilize ripe " point-to-point " quantum key distribution device as basic link, the relaying side that utilize to trust at the node place carries out " route " and the quantum key distribution network formed, in such network, every pair of quantum key carries out independent allocation between adjacent two nodes.Utilize the quantum key that generates on each node to the classical information that will send carry out successively " encryption-deciphering-encryption-...-deciphering " operation.Like this, utilize the key that a plurality of " point-to-point " link is encrypted, manner of decryption realizes long distance to transmit.The advantage of this class network is: trusted parties is the quantum-key distribution between the quantum key distribution network of node formation is easy to realize at a distance under existing technical conditions, can serve in the wide scope.Shortcoming is: security of network system depends on the Reliability at node place, and promptly each node all is trusty.This is that these information can repeatedly be duplicated and can not be found because the information of transmitting (key or important information) can be retained in the memory of any one node.Along with the increase of transmission range, the number of node increases thereupon, and safety and reliable guarantee coefficient reduce thereupon, so these are totally unfavorable aspects for the communication system that is kept absolutely secret.
In addition, its node of quantum key distribution network can utilize optical switch or wavelength division multiplex device or beam splitter to wait to realize.1. based on the quantum key distribution network system of optical switch or wavelength division multiplexer, its advantage: one, technology realizes easily: this quantum key distribution network is being easy to realize under the technical conditions at present; Two, fail safe is good: quantum information can be not destroyed in transmittance process, and fail safe is good; Three, user function is good: can realize encryption key distribution between any two users in the network.But its existing shortcoming is: one, and service range is little: node does not possess the relaying enlarging function, can only serve metropolitan area or local scope; Two, the network capacity autgmentability is poor: the capacity of network is subjected to the restriction of device parameters, and there is bigger insertion loss in this two classes optics, increase along with network user's capacity, can only expand by the mode of optics cascade, therefore insert loss and also increase thereupon, thereby can shorten the quantum-key distribution transmission range, and the generating rate that reduces quantum key.2. based on the quantum key distribution network of beam splitter.Its advantage: one, technology realizes easily: this quantum key distribution network is being easy to realize under the technical conditions at present; Two, fail safe is good: quantum information can be not destroyed in transmittance process, and fail safe is good.Shortcoming: one, service range is little: node does not possess the relaying enlarging function, can only serve metropolitan area or local scope; Two, user function is poor: can only realize in the network a bit to the encryption key distribution between the multiple spot; Three, scalability is poor, and the expansion of the user capacity of network has a strong impact on the transmission range of quantum key and distributes speed.Because the listener-in can eavesdrop all of the port of beam splitter simultaneously, therefore, the average photon number μ that transmit leg Alice launches should equal η, and η is the total efficiency of transmission of quantum bit (Channel Transmission efficient and detection efficient are long-pending) between Alice and each the receiving terminal Bob.Behind 1 * n beam splitter, in fact the average photon number between Alice and each receiving terminal Bob is μ/n.Along with user's increase, n increases thereupon, and the transmission range and the key generating rate of safety sharply reduce thereupon.
For the quantum node based on the quantum entanglement characteristic, its advantage is: one, and service range is wide: the quantum node has the relaying enlarging function, can serve in local, metropolitan area, the wide scope.Two, fail safe is good: quantum information can be not destroyed in transmittance process, and fail safe is good; Three, user function is good: can realize encryption key distribution between any two users in the network.Shortcoming: technology realizes having difficulties at present.Though its feasibility that original reason experiment research is verified, but the realization of quantum device depends on existing manufacture craft and level, In the view of at present, high accuracy quantum components and parts with nano-micro structure may be built quantum information system efficiently, that is to say, have only the development of nanometer technology, could guarantee that the quantum router of successfully development has the parameter that needs.Yet, under the current experiments condition, also can't realize.
To sum up, there is following shortcoming in existing multi-user quantum key dispatching system based on beam splitter: one, and user function is poor: can only realize in the network a bit to the encryption key distribution between the multiple spot; Two, the user capacity scalability is poor: the expansion of capacity has reduced the transmission range and the formation efficiency of key; Three, transmission range is short.
Summary of the invention
Technical problem to be solved by this invention is at above-mentioned deficiency of the prior art, provide a kind of reasonable in design, use easy to operate and the user capacity extended capability strong, long transmission distance, expandable multi-user quantum key distribution network system that user function is good.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of expandable multi-user quantum key distribution network system, comprise the point of being made up of quantum key transmitting terminal and a plurality of quantum key receiving terminals of joining with the quantum key transmitting terminal respectively to the multiple spot quantum key dispatching system, the quantum key information that the quantum key transmitting terminal is distributed to described a plurality of quantum key receiving terminals is corresponding a plurality of random binary sequence; All can throughput sub-key transmitting terminal between any two quantum key receiving terminals in described a plurality of quantum key receiving terminal to separately and the shared quantum key information between the quantum key transmitting terminal be analyzed and judge that the back realizes that key shares.
Described quantum key transmitting terminal is by the weak coherent light source that can prepare the coherent pulse sequence, the coherent pulse sequence that the weak coherent light source is produced is divided into the 1 * n beam splitter with corresponding n weak coherent sequence of described a plurality of quantum key receiving terminals, correspondence is connected on n exit of 1 * n beam splitter and tackles the phase place that respectively exports the weak coherent sequence of sending in the place mutually and carry out random coded and corresponding n the phase-modulator of the individual quantum bit sequence at random of n and also corresponding n the attenuator that is sent to the quantum key receiving terminal of respectively the individual quantum bit sequence at random of described n being decayed prepared respectively, and the quantity of described a plurality of quantum key receiving terminals is n; Quantum key receiving terminal correspondence is provided with carries out demodulation and obtains the decoder of a corresponding random binary sequence the bit sequence of quantum at random that is received; Described 1 * n beam splitter is laid in the light outlet place of weak coherent light source, and attenuator is laid in the exit of phase-modulator; Described quantum bit sequence is the light quantum bit sequence, and described coherent pulse sequence is a train of coherent optical pulses.
Be connected by telecommunication optical fiber between described attenuator and the quantum key receiving terminal.
The present invention also provides the expandable multi-user quantum key distribution network system that utilizes that a kind of method step is simple, realization is easy and result of use is good to carry out the method for encryption key distribution, it is characterized in that this method may further comprise the steps:
Step 1, quantum key transmitting terminal and described a plurality of quantum key receiving terminal carry out quantum-key distribution respectively, promptly send a random quantity sub-key information to each quantum key receiving terminal respectively by the quantum key transmitting terminal; After quantum-key distribution finishes, all share the i.e. one section random binary sequence of one section random quantity sub-key in the described random quantity sub-key information between quantum key transmitting terminal and each quantum key receiving terminal, and the length of one section random quantity sub-key being shared between quantum key transmitting terminal and described a plurality of quantum key receiving terminals is that bit number is all identical;
201, Bobi and Bobj send to the quantum key transmitting terminal respectively and want to set up the request of sharing key with the other side;
202, after the quantum key transmitting terminal receives the request that Bobi and Bobj send, corresponding it is compared by turn with two sections quantum keys that Bobi and Bobj share respectively, and the corresponding comparative result that draws: when the numerical value on the corresponding position of two sections quantum keys was consistent, the quantum key transmitting terminal was got " Y " to the comparative result on this; When the numerical value on the corresponding position of two sections quantum keys was inconsistent, the quantum key transmitting terminal was got " N " to the comparative result on this;
203, the quantum key transmitting terminal is told Bobi and Bobj by disclosed channel with the comparative result that is drawn;
204, Bobi is according to the own quantum key of being shared with the quantum key transmitting terminal, and the binding capacity sub-key transmitting terminal comparative result of being informed can be inferred the quantum key that Bobj and quantum key transmitting terminal are shared again; In like manner, Bobj also deducibility goes out the quantum key that Bobi and quantum key transmitting terminal are shared, and then just builds up cipher key shared between Bobi and Bobj, and promptly Bobi and Bobj share the other side's quantum key each other;
Bobi and Bobj all can not share the two institute's cipher key shared again with any the 3rd quantum key receiving terminal.
When the quantum key transmitting terminal described in the above-mentioned steps one and described a plurality of quantum key receiving terminal carried out quantum-key distribution respectively, its quantum key distribution protocol was BB84 agreement, phase difference quantum key distribution protocol or B92 agreement.
Before quantum key transmitting terminal described in the above-mentioned steps 202 carries out by turn its two sections quantum keys sharing with Bobi and Bobj respectively relatively, earlier described two sections quantum key correspondences are progressively numbered respectively, the corresponding bit of identical numbering is identical in described two sections quantum keys.
The present invention compared with prior art has the following advantages:
1, expandable multi-user quantum key distribution network system can realize that in network between any two legal quantum key receiving terminals be any two users' encryption key distribution.
2, the expansion of user capacity no longer influences the transmission range and the encryption key distribution speed of key, and theoretically, the expansion of user capacity is unrestricted; And the expansion of user capacity does not influence other user's performance yet.
3, under existing technical conditions, and under the condition that does not change network system and relevant device parameter thereof, this expandable multi-user quantum key distribution network system can expand to transmission range original 2 times, and its limit transmission range can reach more than the 200km, thereby can serve the metropolitan area scope fully.
4, technical difficulty and project cost are low.
In sum, the present invention is primarily aimed at existing multi-user quantum key dispatching system based on beam splitter and improves, and a kind of star-like quantum key distribution network system of corresponding proposition, it is reasonable in design, use is easy to operate and the user capacity extended capability is strong, long transmission distance, user function are good, after emission side and each recipient finish quantum-key distribution, can carry out key between any two recipients and share.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is the structural representation of expandable multi-user quantum key distribution network system of the present invention.
Fig. 2 is the flow chart of expandable multi-user quantum method for distributing key of the present invention.
Description of reference numerals:
1-quantum key transmitting terminal; 1-1-weak coherent light source; 1-2-1 * n beam splitter;
The 1-3-phase-modulator; The 1-4-attenuator; 2-quantum key receiving terminal;
The 3-telecommunication optical fiber.
Embodiment
As shown in Figure 1, expandable multi-user quantum key distribution network system of the present invention comprises that the point of being made up of quantum key transmitting terminal 1 (being Alice) and a plurality of quantum key receiving terminals 2 of joining with quantum key transmitting terminal 1 respectively is to the multiple spot quantum key dispatching system.The quantum key information that described quantum key transmitting terminal 1 is distributed to described a plurality of quantum key receiving terminals 2 is corresponding a plurality of random binary sequence.All can throughput sub-key transmitting terminal between any two quantum key receiving terminals 2 in described a plurality of quantum key receiving terminal 21 pair separately and the shared quantum key information of 1 of quantum key transmitting terminal be analyzed and judge that the back realizes that key shares.
In the present embodiment, described quantum key transmitting terminal 1 is by the weak coherent light source 1-1 (being WCP) that can prepare the coherent pulse sequence, the coherent pulse sequence that weak coherent light source 1-1 is produced is divided into the 1 * n beam splitter 1-2 (being Beam-splitter) with described a plurality of quantum key receiving terminal 2 corresponding n weak coherent sequence, respectively correspondence be connected on n exit of 1 * n beam splitter 1-2 and mutually the reply phase place that respectively exports the weak coherent sequence of sending in the place carry out random coded and corresponding prepare n at random n phase-modulator 1-3 of quantum bit sequence (be φ 1, φ 2...... φ n) and respectively also corresponding n the attenuator 1-4 that is sent to quantum key receiving terminal 2 that the individual quantum bit sequence at random of described n decayed (is ATT1, ATT2......ATTn).The quantity of described a plurality of quantum key receiving terminals 2 is n, is specially Bob1, Bob2......Bobn.Described quantum key receiving terminal 2 correspondences are provided with carries out demodulation and obtains the decoder of a corresponding random binary sequence the bit sequence of quantum at random that is received.Described 1 * n beam splitter 1-2 is laid in the light outlet place of weak coherent light source 1-1, and attenuator 1-4 is laid in the exit of phase-modulator 1-3; Described quantum bit sequence is the light quantum bit sequence, and described coherent pulse sequence is a train of coherent optical pulses.
Be connected by telecommunication optical fiber 3 between described attenuator 1-4 and the quantum key receiving terminal 2.
In conjunction with Fig. 2, expandable multi-user quantum method for distributing key of the present invention may further comprise the steps:
Step 1, quantum key transmitting terminal 1 carry out quantum-key distribution respectively with described a plurality of quantum key receiving terminals 2, promptly send a random quantity sub-key information to each quantum key receiving terminal 2 respectively by quantum key transmitting terminal 1.After quantum-key distribution finishes, 2 one section random quantity sub-keys all sharing in the described random quantity sub-key information of quantum key transmitting terminal 1 and each quantum key receiving terminal are one section random binary sequence, and the length of 2 one section random quantity sub-keys being shared of quantum key transmitting terminal 1 and described a plurality of quantum key receiving terminals is that bit number is all identical.
In the present embodiment, in the quantum key transmitting terminal 1, at first produce a weak coherent, be specially a faint train of coherent optical pulses by weak coherent light source 1-1; The faint train of coherent optical pulses that is produced through 1 * n beam splitter 1-2 after, obtain n faint train of coherent optical pulses; Simultaneously, n phase-modulator 1-3 by being connected each exit of 1 * n beam splitter 1-2 is (in the actual mechanical process, can carry out Stochastic Modulation to each phase-modulator 1-3 independently respectively), promptly the phase place of light pulse in 1-2n pairing n in exit of 1 * n beam splitter the faint train of coherent optical pulses is independently carried out random coded respectively, thereby prepare n quantum bit sequence at random, wherein quantum bit is the basic information unit (BIU) in the quantum computer; Then, utilize n attenuator 1-4 that the individual quantum bit sequence at random of n is decayed respectively, be sent to each quantum key receiving terminal 2 respectively by telecommunication optical fiber at last.To sum up, the bit sequence of quantum at random after decay from n attenuator 1-4 is sent to n quantum key receiving terminal 2 respectively is the random quantity sub-key information that quantum key transmitting terminal 1 is sent to n quantum key receiving terminal 2 respectively.After the above-mentioned n that is sent out from quantum key transmitting terminal 1 quantum bit sequence correspondence arrives quantum key receiving terminal 2 respectively at random, each quantum key receiving terminal 2 utilizes its inner set decoder that the bit sequence of quantum at random that arrives is decoded respectively, obtain random quantity sub-key information, thereby finish from 1 to n quantum key receiving terminal 2 quantum-key distribution process of a quantum key transmitting terminal.
When described quantum key transmitting terminal 1 carried out quantum-key distribution respectively with described a plurality of n of being quantum key receiving terminal 2, its quantum key distribution protocol was BB84 agreement, phase difference quantum key distribution protocol or B92 agreement.During actual the use, its quantum key distribution protocol can also be some other related protocol outside BB84 agreement (adopting four kinds of polarization states to carry out key distribution), phase difference agreement (DPSK) and the B92 agreement (being B92 quantum key agreement).
To sum up, among the present invention, quantum key transmitting terminal 1 can be distinguished independently and 2 of any one quantum key receiving terminals are realized quantum-key distribution.After quantum key assigned, quantum key transmitting terminal 1 was shared the i.e. one section random binary sequence of one section quantum key with each quantum key receiving terminal 2.
201, Bobi and Bobj send to quantum key transmitting terminal 1 respectively and want to set up the request of sharing key with the other side.Wherein, i ≠ j and the two all are not less than and all are not more than n, that is to say, Bobi and Bobj are any two quantum key receiving terminals 2 among Bob1, the Bob2......Bobn.
202, after quantum key transmitting terminal 1 receives the request that Bobi and Bobj send, corresponding it is compared by turn with two sections quantum keys that Bobi and Bobj share respectively, and the corresponding comparative result that draws: when the numerical value on the corresponding position of two sections quantum keys was consistent, quantum key transmitting terminal (1) was got " Y " to the comparative result on this; When the numerical value on the corresponding position of two sections quantum keys was inconsistent, quantum key transmitting terminal 1 was got " N " to the comparative result on this.
In the present embodiment, before described quantum key transmitting terminal 1 carries out by turn its two sections quantum keys sharing with Bobi and Bobj respectively relatively, earlier described two sections quantum key correspondences are progressively numbered respectively, the corresponding bit of identical numbering is identical in described two sections quantum keys.
203, quantum key transmitting terminal 1 is told Bobi and Bobj by disclosed channel with the comparative result that is drawn.
204, Bobi is according to the own quantum key of being shared with quantum key transmitting terminal 1, and binding capacity sub-key transmitting terminal 1 comparative result of being informed can be inferred the quantum key that Bobj and quantum key transmitting terminal 1 are shared again; In like manner, Bobj also deducibility goes out the quantum key that Bobi and quantum key transmitting terminal 1 are shared, and then just builds up cipher key shared between Bobi and Bobj, and promptly Bobi and Bobj share the other side's quantum key each other.
Be noted that: Bobi and Bobj all can not share the two institute's cipher key shared again with any the 3rd quantum key receiving terminal 2.
In the present embodiment, the tabulation of key shared procedure is as shown in table 1 between Bobi and Bobj:
Key shared procedure tabulation between table 1Bobi and Bobj
As can be seen from Table 1, for point of the present invention to multiple spot quantum-key distribution (distribution) system, any two quantum key receiving terminals 2 finished and Alice between quantum-key distribution after, can realize that key each other shares.And, for the sake of security, between two quantum key receiving terminals 2, specifically be the quantum key shared between two users can not be used for again with third party be that quantum key receiving terminal 2 is shared.For example, if after Bob1 and Bob2 had shared quantum key each other, Bob1 can not share with above-mentioned cipher key shared and Bob3 again.Because like this, Bob3 has just known the key information of Bob2, causes dangerous use.In addition, carry out, before quantum key distribution, need communication parties is carried out identification, in case personation for guaranteed discharge quantum key distribution process safety.
The above; it only is preferred embodiment of the present invention; be not that the present invention is imposed any restrictions, everyly any simple modification that above embodiment did, change and equivalent structure changed, all still belong in the protection range of technical solution of the present invention according to the technology of the present invention essence.
Claims (6)
1. expandable multi-user quantum key distribution network system, it is characterized in that: comprise the point of being made up of quantum key transmitting terminal (1) and a plurality of quantum key receiving terminals (2) of joining with quantum key transmitting terminal (1) respectively to the multiple spot quantum key dispatching system, the quantum key information that quantum key transmitting terminal (1) is distributed to described a plurality of quantum key receiving terminals (2) is corresponding a plurality of random binary sequence; All can throughput sub-key transmitting terminal (1) between any two quantum key receiving terminals (2) in described a plurality of quantum key receiving terminals (2) to separately and the shared quantum key information between quantum key transmitting terminal (1) be analyzed and judge that the back realizes that key shares.
2. according to the described expandable multi-user quantum key distribution network system of claim 1, it is characterized in that: described quantum key transmitting terminal (1) is by the weak coherent light source (1-1) that can prepare the coherent pulse sequence, the coherent pulse sequence that weak coherent light source (1-1) is produced is divided into the 1 * n beam splitter (1-2) with corresponding n weak coherent sequence of described a plurality of quantum key receiving terminals (2), respectively correspondence be connected on n exit of 1 * n beam splitter (1-2) and mutually the reply phase place that respectively exports the weak coherent sequence of sending in the place carry out random coded and correspondingly prepare n n the phase-modulator (1-3) of quantum bit sequence and n the attenuator (1-4) that the correspondence also of respectively the individual quantum bit sequence at random of described n being decayed is sent to quantum key receiving terminal (2) at random, the quantity of described a plurality of quantum key receiving terminals (2) is n; Quantum key receiving terminal (2) correspondence is provided with carries out demodulation and obtains the decoder of a corresponding random binary sequence the bit sequence of quantum at random that is received; Described 1 * n beam splitter (1-2) is laid in the light outlet place of weak coherent light source (1-1), and attenuator (1-4) is laid in the exit of phase-modulator (1-3); Described quantum bit sequence is the light quantum bit sequence, and described coherent pulse sequence is a train of coherent optical pulses.
3. according to the described expandable multi-user quantum key distribution network system of claim 2, it is characterized in that: be connected by telecommunication optical fiber (3) between described attenuator (1-4) and the quantum key receiving terminal (2).
4. method of utilizing the described expandable multi-user quantum key distribution network system of claim 1 to carry out encryption key distribution is characterized in that this method may further comprise the steps:
Step 1, quantum key transmitting terminal (1) carry out quantum-key distribution respectively with described a plurality of quantum key receiving terminals (2), promptly send a random quantity sub-key information to each quantum key receiving terminal (2) respectively by quantum key transmitting terminal (1); After quantum-key distribution finishes, all share the i.e. one section random binary sequence of one section random quantity sub-key in the described random quantity sub-key information between quantum key transmitting terminal (1) and each quantum key receiving terminal (2), and the length of one section random quantity sub-key being shared between quantum key transmitting terminal (1) and described a plurality of quantum key receiving terminals (2) is that bit number is all identical;
Step 2, when any two the quantum key receiving terminals (2) in described a plurality of quantum key receiving terminals (2) are Bobi and Bobj when wanting to set up cipher key shared, it is as follows that it sets up process:
201, Bobi and Bobj send to quantum key transmitting terminal (1) respectively and want to set up the request of sharing key with the other side;
202, after quantum key transmitting terminal (1) receives the request that Bobi and Bobj send, corresponding it is compared by turn with two sections quantum keys that Bobi and Bobj share respectively, and the corresponding comparative result that draws: when the numerical value on the corresponding position of two sections quantum keys was consistent, quantum key transmitting terminal (1) was got " Y " to the comparative result on this; When the numerical value on the corresponding position of two sections quantum keys was inconsistent, quantum key transmitting terminal (1) was got " N " to the comparative result on this;
203, quantum key transmitting terminal (1) is told Bobi and Bobj by disclosed channel with the comparative result that is drawn;
204, Bobi is according to the own quantum key of being shared with quantum key transmitting terminal (1), and binding capacity sub-key transmitting terminal (1) comparative result of being informed can be inferred the quantum key that Bobj and quantum key transmitting terminal (1) are shared again; In like manner, Bobj also deducibility goes out the quantum key that Bobi and quantum key transmitting terminal (1) are shared, and then just builds up cipher key shared between Bobi and Bobj, and promptly Bobi and Bobj share the other side's quantum key each other;
Bobi and Bobj all can not share the two institute's cipher key shared again with any the 3rd quantum key receiving terminal (2).
5. according to the described expandable multi-user quantum method for distributing key of claim 4, it is characterized in that: when the quantum key transmitting terminal (1) described in the step 1 carried out quantum-key distribution respectively with described a plurality of quantum key receiving terminals (2), its quantum key distribution protocol was BB84 agreement, phase difference quantum key distribution protocol or B92 agreement.
6. according to claim 4 or 5 described expandable multi-user quantum method for distributing key, it is characterized in that: before the quantum key transmitting terminal (1) described in the step 202 carries out by turn its two sections quantum keys sharing with Bobi and Bobj respectively relatively, earlier described two sections quantum key correspondences are progressively numbered respectively, the corresponding bit of identical numbering is identical in described two sections quantum keys.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100232826A CN101599826B (en) | 2009-07-10 | 2009-07-10 | Expandable multi-user quantum key distribution network system and key distribution method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100232826A CN101599826B (en) | 2009-07-10 | 2009-07-10 | Expandable multi-user quantum key distribution network system and key distribution method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101599826A true CN101599826A (en) | 2009-12-09 |
| CN101599826B CN101599826B (en) | 2011-08-24 |
Family
ID=41421093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100232826A Expired - Fee Related CN101599826B (en) | 2009-07-10 | 2009-07-10 | Expandable multi-user quantum key distribution network system and key distribution method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101599826B (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102130769A (en) * | 2011-03-10 | 2011-07-20 | 北京邮电大学 | Model and method for realizing request control and automatic implementation of quantum key distribution (QKD) |
| US8483394B2 (en) | 2010-06-15 | 2013-07-09 | Los Alamos National Security, Llc | Secure multi-party communication with quantum key distribution managed by trusted authority |
| CN103227718A (en) * | 2012-12-31 | 2013-07-31 | 安徽问天量子科技股份有限公司 | Integrated controller and control method for controlling sending and receiving of quantum secret key |
| CN103259601A (en) * | 2013-04-23 | 2013-08-21 | 安徽问天量子科技股份有限公司 | Optical signal phase modulation device for quantum secret key communication |
| US9002009B2 (en) | 2010-06-15 | 2015-04-07 | Los Alamos National Security, Llc | Quantum key distribution using card, base station and trusted authority |
| CN104821872A (en) * | 2015-03-24 | 2015-08-05 | 西北大学 | Bit-frame synchronization method applied to continuous-variable quantum key distribution system |
| US9287994B2 (en) | 2011-09-30 | 2016-03-15 | Los Alamos National Security, Llc | Great circle solution to polarization-based quantum communication (QC) in optical fiber |
| CN105871538A (en) * | 2015-01-22 | 2016-08-17 | 阿里巴巴集团控股有限公司 | Quantum key distribution system, quantum key distribution method and device |
| US9509506B2 (en) | 2011-09-30 | 2016-11-29 | Los Alamos National Security, Llc | Quantum key management |
| CN106658076A (en) * | 2016-10-26 | 2017-05-10 | 中国传媒大学 | Digital copyright management system |
| CN106789038A (en) * | 2017-01-25 | 2017-05-31 | 济南浪潮高新科技投资发展有限公司 | A kind of method and system of subsurface communication, a kind of free running device under water |
| CN107241188A (en) * | 2017-06-02 | 2017-10-10 | 丁爱民 | A kind of quantum data storage decoding method, apparatus and system |
| US9819418B2 (en) | 2012-08-17 | 2017-11-14 | Los Alamos National Security, Llc | Quantum communications system with integrated photonic devices |
| US9866379B2 (en) | 2011-09-30 | 2018-01-09 | Los Alamos National Security, Llc | Polarization tracking system for free-space optical communication, including quantum communication |
| CN107682154A (en) * | 2017-11-13 | 2018-02-09 | 苏州大学 | A kind of expandable multi-user collection quantum key sharing method |
| CN109005034A (en) * | 2018-09-19 | 2018-12-14 | 北京邮电大学 | A kind of multi-tenant quantum key Supply Method and device |
| CN109981270A (en) * | 2019-04-04 | 2019-07-05 | 吉林工程技术师范学院 | Pp file transmission method based on the synchronous destruction technology of quantum key |
| CN111555871A (en) * | 2020-04-29 | 2020-08-18 | 中国科学院半导体研究所 | Reconfigurable receiving chip for quantum key distribution |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1929372B (en) * | 2006-09-22 | 2010-04-21 | 西南大学 | Highly effective quantum key distribution method |
| CN201430596Y (en) * | 2009-07-10 | 2010-03-24 | 陕西理工学院 | Extendible multi-user quantum key distribution network system |
-
2009
- 2009-07-10 CN CN2009100232826A patent/CN101599826B/en not_active Expired - Fee Related
Cited By (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9680640B2 (en) | 2010-06-15 | 2017-06-13 | Los Alamos National Security, Llc | Secure multi-party communication with quantum key distribution managed by trusted authority |
| US8483394B2 (en) | 2010-06-15 | 2013-07-09 | Los Alamos National Security, Llc | Secure multi-party communication with quantum key distribution managed by trusted authority |
| US9002009B2 (en) | 2010-06-15 | 2015-04-07 | Los Alamos National Security, Llc | Quantum key distribution using card, base station and trusted authority |
| US8929554B2 (en) | 2010-09-30 | 2015-01-06 | Los Alamos National Security, Llc | Secure multi-party communication with quantum key distribution managed by trusted authority |
| US9680641B2 (en) | 2010-09-30 | 2017-06-13 | Los Alamos National Security, Llc | Quantum key distribution using card, base station and trusted authority |
| CN102130769A (en) * | 2011-03-10 | 2011-07-20 | 北京邮电大学 | Model and method for realizing request control and automatic implementation of quantum key distribution (QKD) |
| US9287994B2 (en) | 2011-09-30 | 2016-03-15 | Los Alamos National Security, Llc | Great circle solution to polarization-based quantum communication (QC) in optical fiber |
| US9866379B2 (en) | 2011-09-30 | 2018-01-09 | Los Alamos National Security, Llc | Polarization tracking system for free-space optical communication, including quantum communication |
| US9509506B2 (en) | 2011-09-30 | 2016-11-29 | Los Alamos National Security, Llc | Quantum key management |
| US9819418B2 (en) | 2012-08-17 | 2017-11-14 | Los Alamos National Security, Llc | Quantum communications system with integrated photonic devices |
| CN103227718A (en) * | 2012-12-31 | 2013-07-31 | 安徽问天量子科技股份有限公司 | Integrated controller and control method for controlling sending and receiving of quantum secret key |
| CN103259601A (en) * | 2013-04-23 | 2013-08-21 | 安徽问天量子科技股份有限公司 | Optical signal phase modulation device for quantum secret key communication |
| US10305873B2 (en) | 2015-01-22 | 2019-05-28 | Alibaba Group Holding Limited | Method, apparatus, and system for quantum key distribution |
| CN105871538A (en) * | 2015-01-22 | 2016-08-17 | 阿里巴巴集团控股有限公司 | Quantum key distribution system, quantum key distribution method and device |
| US10757083B2 (en) | 2015-01-22 | 2020-08-25 | Alibaba Group Holding Limited | Method, apparatus, and system for quantum key distribution |
| CN105871538B (en) * | 2015-01-22 | 2019-04-12 | 阿里巴巴集团控股有限公司 | Quantum key distribution system, quantum key delivering method and device |
| CN104821872B (en) * | 2015-03-24 | 2018-02-09 | 西北大学 | A kind of position frame synchornization method for continuous variable quantum key distribution system |
| CN104821872A (en) * | 2015-03-24 | 2015-08-05 | 西北大学 | Bit-frame synchronization method applied to continuous-variable quantum key distribution system |
| CN106658076B (en) * | 2016-10-26 | 2020-04-14 | 中国传媒大学 | Digital copyright management system |
| CN106658076A (en) * | 2016-10-26 | 2017-05-10 | 中国传媒大学 | Digital copyright management system |
| CN106789038A (en) * | 2017-01-25 | 2017-05-31 | 济南浪潮高新科技投资发展有限公司 | A kind of method and system of subsurface communication, a kind of free running device under water |
| CN107241188A (en) * | 2017-06-02 | 2017-10-10 | 丁爱民 | A kind of quantum data storage decoding method, apparatus and system |
| CN107241188B (en) * | 2017-06-02 | 2022-01-28 | 丁爱民 | Quantum storage data encoding and decoding method, device and system |
| CN107682154A (en) * | 2017-11-13 | 2018-02-09 | 苏州大学 | A kind of expandable multi-user collection quantum key sharing method |
| CN107682154B (en) * | 2017-11-13 | 2021-01-19 | 苏州大学 | Extensible multi-user set quantum key sharing method |
| CN109005034A (en) * | 2018-09-19 | 2018-12-14 | 北京邮电大学 | A kind of multi-tenant quantum key Supply Method and device |
| CN109005034B (en) * | 2018-09-19 | 2020-10-02 | 北京邮电大学 | Multi-tenant quantum key supply method and device |
| CN109981270A (en) * | 2019-04-04 | 2019-07-05 | 吉林工程技术师范学院 | Pp file transmission method based on the synchronous destruction technology of quantum key |
| CN109981270B (en) * | 2019-04-04 | 2021-06-22 | 吉林工程技术师范学院 | Point-to-point file transmission method based on quantum key synchronous destruction technology |
| CN111555871A (en) * | 2020-04-29 | 2020-08-18 | 中国科学院半导体研究所 | Reconfigurable receiving chip for quantum key distribution |
| CN111555871B (en) * | 2020-04-29 | 2021-03-26 | 中国科学院半导体研究所 | Reconfigurable receiving chip for quantum key distribution |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101599826B (en) | 2011-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101599826B (en) | Expandable multi-user quantum key distribution network system and key distribution method thereof | |
| Cao et al. | The evolution of quantum key distribution networks: On the road to the qinternet | |
| CN109660337B (en) | Quantum and classical converged communication network system and key distribution method thereof | |
| JP5784612B2 (en) | Method and apparatus for use in quantum key distribution | |
| Xu et al. | Field experiment on a robust hierarchical metropolitan quantum cryptography network | |
| US7899183B2 (en) | Random number generating and sharing system, encrypted communication apparatus, and random number generating and sharing method for use therein | |
| US20160380765A1 (en) | Quantum enabled security for optical communications | |
| Dušek et al. | Quantum identification system | |
| Townsend et al. | Design of quantum cryptography systems for passive optical networks | |
| US7738793B2 (en) | Secure optical communication system | |
| Sasaki et al. | Quantum photonic network: concept, basic tools, and future issues | |
| CN201430596Y (en) | Extendible multi-user quantum key distribution network system | |
| JP6471903B2 (en) | Optical communication system | |
| Oesterling et al. | Comparison of commercial and next generation quantum key distribution: Technologies for secure communication of information | |
| KR102053780B1 (en) | Method, apparatus and system for code based quantum key distribution | |
| Lo et al. | Quantum cryptography: from theory to practice | |
| WO2012039595A1 (en) | Dual coding coherent phase protocol | |
| CN108712254A (en) | A kind of quantum key distribution system and method | |
| Razavi et al. | Architectural considerations in hybrid quantum-classical networks | |
| Corndorf et al. | Quantum-noise: protected data encryption for WDM fiber-optic networks | |
| Cao et al. | Mixed relay placement for quantum key distribution chain deployment over optical networks | |
| CN107659362A (en) | A kind of full light steganography method based on ASE noises and Wavelength-encoding phase-modulation | |
| Yunlu et al. | A novel WDM-PON based on quantum key distribution FPGA controller | |
| WANG et al. | A Quantum Key Re-Transmission Mechanism for QKD-Based Optical Networks | |
| CN117061108A (en) | Quantum key distribution method and system for secure transmission at any distance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110824 Termination date: 20130710 |