CN100592679C - Qkd system ambiguous remote control - Google Patents
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- CN100592679C CN100592679C CN 200580035338 CN200580035338A CN100592679C CN 100592679 C CN100592679 C CN 100592679C CN 200580035338 CN200580035338 CN 200580035338 CN 200580035338 A CN200580035338 A CN 200580035338A CN 100592679 C CN100592679 C CN 100592679C
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- 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
Abstract
Systems, methods and architectures that allow for controlling (e.g., initializing, stabilizing and/or calibrating) a remote node (Alice/Bob) of a QKD system (10) via a local node (Bob/Alice) of the QKD system are disclosed. The system includes a graphical user interface (GUI), a family of calibration objects, and a family of card objects. The calibration objects support software that allow for thecalibration and/or initialization and/or stabilization of the QKD system via the GUI at the local node. The card family of objects allows for the calibration software to interface with the physical components of each node to carry out the remote calibration, initialization and/or stabilization of the remote node from the local node.
Description
Require priority
Present patent application requires in the priority of the 60/610th, No. 018 U.S. Provisional Patent Application of submission on September 15th, 2004 according to 35U.S.C.119 (e).
Technical field
The present invention relates to quantum cryptography and have industrial applicibility about quantum cryptography, specifically, relate to following quantum-key distribution (QKD) system, device, method and software architecture and have industrial applicibility about it, described quantum-key distribution (QKD) system, device, method and software architecture are used to control the QKD system node to carry out system initialization, stabilisation and calibration.
Background technology
Quantum-key distribution relates to by the light signal that uses weak (for example, average 0.1 photon) that upward send at " quantum channel " and set up key between sender (" Alice ") and recipient (" Bob ").The safety of encryption key distribution is based on principle of quantum mechanics,, will revise its state to any measurement of the quantized system in the unknown state that is.Thereby, attempt to intercept or otherwise the listener-in of measuring amount subsignal (" Eve ") mode will be incorporated into mistake in the signal of transmission, thereby expose listener-in's existence.
By Bennett and Brassard article " Quantum Cryptography:Public key distribution and coin tossing; " Proceedings of theInternational Conference on Computers at them, Systems and SignalProcessing, Bangalore, India, 1984, pp.175-179 (IEEE, New York, 1984) the middle General Principle that has proposed quantum cryptography for the first time.Be entitled as " the Qu antum Cryptography Using Any Two Non-Orthogonal States " that is entitled as " Experimental Quantum Cryptography " and C.H.Bennett at C.H.Bennett etc., in the publication of Phys.Rev.Lett.68 3121 (1992), and the United States Patent (USP) 5 of Bennett, in 307,410 (' 410 patents) concrete QKD system has been described.
At " The Physics of Quantum Information, " Springer-Verlag 2001 of Bouwmeester etc., in Section 2.3 has described the general processing that is used to carry out QKD in the pages 27-33 book.In described QKD handles, Alice uses true random to count maker (TRNG) and generates random bit (" basic bit ") that is used for the basis and the random bit (" key bit ") that is used for key, (thereby for example using polarization or phase code) creates quantum bit (qubit), and this quantum bit is sent to Bob.
In typical QKD system, Alice carries out random coded to the polarization or the phase place of single photon, the polarization or the phase place of Bob random measurement photon.The QKD system of describing in the paper in 1992 of Bennett and ' 410 patents is based on shares interferometer system, and this paper and patent merge to this by reference.Alice and Bob can visit the various piece of interferometer system, thereby every side can control the phase place of interferometer.The signal (pulse) that sends to Bob from Alice is time-multiplexed, and adopts different paths.
Can expect to have and make a plurality of QKD links be woven in one day to be used for connecting total QKD network of its QKD end points via the grid of QKD relaying or router (" node ").At C.Elliot, New Journal of Physics 4 (2002), the publication of 46.1-46.12 and in the PCT of WO 02/05480 patent application is open, example QKD network has been discussed.
With reference to Fig. 1, the simplest QKD system is by for example defining via optical fiber link F1 single Bob node and single Alice node coupled to each other optically.Alice and Bob typically comprise some public intrawares and some specific internal components.The difference of their specific internal components is the thing that is used to distinguish Bob node and Alice node.
Specifically, the computer (controller) that is used to provide to the interface of discrete optical assembly and nextport hardware component NextPort and function typically is provided for Alice and Bob.Computer interface provides such environment, by described environment, and configuration under software control, management and monitor optical assembly and nextport hardware component NextPort and function.Computer also provides (for example based on TCP/IP's) communication function, and described communication function is used for going up connection Bob and Alice in physical mediums of communication (for example Ethernet).Bob and Alice comprise timing controlled function and synchronous (sync) function.
Common component and the function, Bob is the packet content sublayer typically between Alice and Bob, and described quantum layer comprises the laser (" Q laser ") that is used for sending quantum (that is, weak) signal between node.Bob also comprises single photon detector (SPD), discriminator and phase-modulator.Except common component and function, Alice comprises for example phase-modulator, and it can be set to four kinds of phase places in being provided with at random.
When combination Bob node and Alice node when going into the QKD grid, must (be called jointly at this that " stabilization procedures ") is to guarantee correct network function to each node executive system and calibration complexity, connection (turn-up), maintenance process.Most process need with certain rank come between synchronization node action and information exchange.In the laboratory was provided with, two nodes were enough approaching each other, initiated and control calibration and the connection process of Bob and Alice by each node of physical access to allow unique user.Yet in the reality (for example commercial) of QKD grid realizes, the physical distance between Bob and the Alice will be very big, therefore not allow these two nodes of unique user physical access and control essential stabilization procedures simultaneously.Fig. 2 and Fig. 3 have described other two kinds of possible combinations of Bob node and Alice node in different QKD grids, and it further makes the logic of the stabilization procedures between XM become complicated.
Therefore, need a kind of apparatus and method, allowing from individual node control Bob node and Alice node, thereby can be on network long-range realization be used for the stabilization procedures of QKD grid.
Summary of the invention
One aspect of the present invention is a kind of stand framework of object-oriented software of QKD system of (node) of QKD station (node) and the 2nd QKD that is used to have, and it makes that the user can be from the remote node in the described node of local node Long-distance Control the described node.This framework comprises: the graphical user interface at local node place (GUI), it allows the user to control the operation of local node and remote node via the safety chain that connects described node.This framework also comprises: the calibration object family in each node, and it comprises software and GUI, described software comprises algorithm, function and the data of the process that is used to support initialization, stabilisation, calibration.This framework also comprises: the card plant family in each node, it comprises the software configuration body, described software configuration body comprises algorithm, function and the data that are used for the physical assemblies of calibration software and each node is carried out interface, thereby realizes initialization, stabilisation and/or the calibration of QKD system from local node.
The present invention is a kind of method that is used for controlling after disposing the QKD system at the scene the QKD system node on the other hand.This method comprises: for each node provides above-mentioned framework; Dispose each node; And sign local node and remote node.This method also comprises: on local node via GUI control local node and remote node, with in the initialization, stabilisation and the calibration that realize the QKD system node at least one.
The present invention is a kind of method that disposes the QKD system at the scene on the other hand.This method comprises: each node in the QKD system provides following software, and described software is used for carrying out initialization, stabilisation and calibration process at the node place of correspondence, and is supported in the graphical user interface (GUI) at local node place.This method also comprises via the software at the GUI of local node operation local node and remote node, thus initialization and/or stable and/or calibration QKD system.
The present invention is a kind of QKD system on the other hand, and it comprises first and second nodes.Each node has Control Software, and described Control Software is used to control the operation of corresponding node, with initialization and/or the stabilisation and/or the calibration of executive system.Described first node and Section Point are coupled by secure communications links in operation.First node is a local node, and Section Point is a remote node.Comprise first and second graphical user interface (GUI), the mode of operation separately of its expression first node and Section Point.This system also comprises: local client computer, near and operationally be coupled to local node, and be used to show described two GUI and realize control local node and remote node via described software.
Description of drawings
Fig. 1 is the schematic diagram that has via the simple QKD grid of optical fiber link two Node B ob coupled to each other and Alice, and the publicly-owned assembly of Alice and Bob and the exemplary embodiment of Alice and the distinctive assembly of Bob are shown;
Fig. 2 is by the Bob of cascade and the Alice schematic diagram to the QKD grid that forms;
Fig. 3 has single Bob node and from the schematic diagram of the QKD grid of its a plurality of Alice nodes of deriving;
Fig. 4 is the schematic diagram that comprises the QKD grid of the fuzzy node Long-distance Control (ANRC) of QKD, wherein, the local client computer manager connects SC1 via safety and is connected to local node (for example Bob), wherein, Bob is connected SC2 with Alice via safety and links to each other, and wherein, the local client computer manager comprises the graphical user interface (GUI) that is used to show about the information of the mode of operation of local node and remote node;
Fig. 5 is the schematic diagram of calibration object inheritance;
Fig. 6 is the schematic diagram of card object inheritance;
Fig. 7 A is the schematic diagram of the local calibration of Bob;
Fig. 7 B is the schematic diagram of the card object of the Bob related with the calibration flow process of Fig. 7 A;
Fig. 8 A is the schematic diagram of the remote calibration of Alice;
Fig. 8 B is the schematic diagram of the card object of the Alice related with the calibration flow process of Fig. 8 A;
Fig. 9 A is the schematic diagram of the local calibration of Alice; And
Fig. 9 B is the schematic diagram of the card object of the Alice related with the calibration flow process of Fig. 9 A.
The various elements of describing in the accompanying drawing only are expression property, and need not to draw in proportion.Its specific part can be exaggerated, and other parts can be dwindled.The accompanying drawing expectation illustrates the of the present invention various embodiment that it will be appreciated by those skilled in the art that and suitably implement.
Embodiment
Comprise for example single point-to-point Bob node and Alice node to the Bob node of (Fig. 1), cascade and Alice node to (Fig. 2) or the configuration requirement of QKD grid of linking the single Bob node (Fig. 3) of the multiple spot Alice node that relates to long-distance optical fiber is coordinated between the arbitrary node in system and the ability of control system stabilization procedures.The present invention is by allowing to allow unique user to initiate and the control stabilization process via the apparatus and method of the long-range realization stabilization procedures of the individual node in the network between Bob node and Alice node in traditional Q KD grid.
Example QKD system is in ' 410 patents and shown in the PCT of the PCT/US2004/03394 patent application, and this PCT patent application merges to this by reference.
Stabilization procedures
In the exemplary embodiment, the tabulation of the common stabilization procedures that Bob node and Alice node are carried out comprises content:
1. synchronous laser is set and guarantees genlocing.
In the exemplary embodiment, the distinctive stabilization procedures of Bob comprises:
1. the Q laser bias is set.
2. Q laser pulse width and timing are set.
3. the SPD temperature is set.
4. each SPD biasing and discriminator sensitivity level are set.
5. determine SPD regularly.
6. determine modulator regularly.
7. modularot voltage is set.
In the exemplary embodiment, the distinctive stabilization procedures of Alice comprises:
1. determine modulator regularly.
2. modularot voltage is set.
QKD?ANRC
The unique user that the present invention's (being called " the QKD grid blurs the node Long-distance Control " or " QKDANRC " at this) allows to be physically located at Bob node or Alice node is carried out the stabilization procedures of the required complexity of (for example initiate, control and monitor) QKD grid to move based on ongoing process.
In the exemplary embodiment, QKD ANRC provides graphical user interface (GUI) to the user, is used for Bob and Alice at the node place of control.Be physically located at which node (being called " local node ") according to the user, be defined as " remote node ", and therefore indicate by GUI with respect to the distant-end node of local node.
Fig. 4 is the schematic diagram as the exemplary embodiment of the QKD ANRC of QKD grid 10 parts.With reference to Fig. 4, transmit in order to support QKD ANRC message, between local node and any remote node, set up safety and connect SC2.
The definition of local node is applied to the following node of QKD grid, and wherein, stabilization procedures directly influences optical assembly and the nextport hardware component NextPort at described node place.
The definition of remote node is applied to the following node of QKD grid, and wherein, stabilization procedures is carried out optical assembly and the nextport hardware component NextPort that message sends the described node of influence by connecting in safety.Because the action of all long-range receptions causes the activity of some this locality, so to a certain extent, all remote nodes are actually local node.
The definition of Control Node is applied to initiate in the QKD grid individual node of all stabilization procedures.
Each node of QKD grid is in charge of and the data relevant with stabilization procedures of safeguarding that it has.Connect to use message to transmit on the SC2 and to be collected in via safety in safety by local node and connect all data that Long-distance Control GUI that SC1 is connected to the local client computer of local node presents to the user from remote node.On safety connects, use message to transmit any data of revising in will the remote node Long-distance Control GUI on local node by local node and be pushed to remote node.
Fig. 5 is the schematic diagram that the inheritance between the calibration object is shown.Fig. 6 is the schematic diagram that the inheritance of card object is shown.
Each node of QKD network system comprises the software object shown in Fig. 5 and Fig. 6.Relation between objects is defined by the class layering.Local node type and remote node type by each physical node define determining of which object of establishment.
Calibration object family comprises the software configuration body, and described software configuration body comprises and is used to support all algorithms, function and the data of initialization, stabilisation and calibration process and the GUI that is used for QKD ANRC.The calibration object layering comprises following object:
● calibration: fundamental objects, be responsible for GUI, calibration algorithm and function and GUI input validation.
● local calibration: handle to bottom hardware with from the visit of the service message of remote calibration.
● remote calibration: initiation is used for remote calibration on local node message sends and replys from the service message of remote node.
● the distinctive local calibration function of Bob local calibration: Bob.
● the distinctive local calibration function of Alice local calibration: Alice.
● Bob remote calibration: the distinctive remote calibration function of the Bob on local node.
● Alice remote calibration: the distinctive remote calibration function of the Alice on local node.
The card plant family comprises the software configuration body, and described software configuration body comprises all algorithms, function and the data of the interface of the different physics optical assemblies that are used to support calibration object family and QKD network system node and nextport hardware component NextPort.The card object hierarchy comprises following object (see figure 6).
● card: all public and general algorithms, function and the data of supporting to be used to visit, control and manage the common light assembly and the nextport hardware component NextPort of QS system node.
● Bob card: the distinctive algorithm of Bob node, function and data that support is used to visit, control and manage distinctive optical assembly of Bob and nextport hardware component NextPort.
● Alice card: the distinctive algorithm of Alice node, function and data that support is used to visit, control and manage distinctive optical assembly of Alice and nextport hardware component NextPort.
Calibration object and card relation between objects are determined by base calibration object, to allow the optical assembly and the nextport hardware component NextPort of calibration object visit and control local node.
On local node, for calibration object and the card object that highlights created and used to the Bob local calibration in Fig. 7 A and 7B.
On local node, for calibration object and the card object that highlights created and used to the Alice remote calibration in Fig. 8 A and 8B.
Fig. 9 A and 9B are local calibration path (Fig. 9 A) that is illustrated in the Alice place and the schematic diagram that blocks object (Fig. 9 B).
QKD ANRC advantage
There is the advantage of many keys in QKD ANRC of the present invention system, for example:
1. eliminated in shipment and wanting with configuration specification calibration QKD system node before sending Ask.
2. the control node of appointment in system is reduced to one with site technology person's quantity
(1)。
3. make individual node in the system can adopt the feature of Bob or Alice.Therefore, except single point-to-point node, also can realize the more complicated configuration of QKD grid.
It is obvious to those skilled in the art that and to carry out various modifications and change to the present invention, and do not break away from the spirit and scope of the present invention.Therefore, desired is, if described modification of the present invention and change are fallen into the scope of claims and equivalent thereof, then the present invention will cover described modification and change.
Claims (7)
1, a kind of equipment that is used for controlling the QKD system node after configuration QKD system comprises:
The OO software architecture that is used for being used to having the QKD system of a QKD node and the 2nd QKD node offers the device of each node, described software architecture makes that the user can be from the remote node in the described node of local node Long-distance Control the described node, and it comprises:
The graphical user interface GUI at local node place, it allows the user to control the operation of local QKD node and long-range QKD node via the safety chain that connects described node;
Calibration object family in each node, it comprises following software and GUI, described software comprises algorithm, function and the data that are used to support initialization, stabilisation and/or calibration process; And
Card plant family in each node, it comprises the software configuration body, described software configuration body comprises algorithm, function and the data that are used for the physical assemblies of calibration software and each node is carried out interface, thereby realizes QKD system initialization and/or stabilisation and/or calibration from local node;
Be used to dispose the device of each node;
Be used to identify the device of local node and remote node; And
Be used on local node via GUI control local node and remote node, with at least one the device in the initialization, stabilisation and the calibration that realize the QKD system node.
2, a kind of method that is used for controlling the QKD system node after configuration QKD system comprises:
The OO software architecture that will be used to have the QKD system of a QKD node and the 2nd QKD node offers each node, described software architecture makes that the user can be from the remote node in the described node of local node Long-distance Control the described node, and it comprises:
The graphical user interface GUI at local node place, it allows the user to control the operation of local QKD node and long-range QKD node via the safety chain that connects described node;
Calibration object family in each node, it comprises following software and GUI, described software comprises algorithm, function and the data that are used to support initialization, stabilisation and/or calibration process; And
Card plant family in each node, it comprises the software configuration body, described software configuration body comprises algorithm, function and the data that are used for the physical assemblies of calibration software and each node is carried out interface, thereby realizes QKD system initialization and/or stabilisation and/or calibration from local node;
Dispose each node;
Sign local node and remote node; And
On local node via GUI control local node and remote node, with in the initialization, stabilisation and the calibration that realize the QKD system node at least one.
3, method according to claim 2, wherein, the step of carrying out stabilisation comprises: carry out at least one stabilization procedures of selecting from following stabilization procedures group, described group comprises: the Q laser bias is set; The Q laser pulse width is set; The Q laser is set regularly; The temperature of single photon detector SPD is set; The single photon detector sensitivity level is set; Determine that modulator regularly; Modularot voltage is set; Set up synchronous laser; And genlocing is set.
4, a kind of method that disposes the QKD system comprises:
Each node in the QKD system provides following software, and described software is used for carrying out initialization, stabilisation and calibration process at the node place of correspondence, and is supported in the graphical user interface GUI at local node place;
Come to operate described software via GUI at the local node place at local node and remote node, thus initialization and/or stable and/or calibrate described QKD system.
5, method according to claim 4, wherein, the step of carrying out stabilisation comprises: carry out at least one stabilization procedures of selecting from following stabilization procedures group, described group comprises: the Q laser bias is set; The Q laser pulse width is set; The Q laser is set regularly; The temperature of single photon detector SPD is set; The single photon detector sensitivity level is set; Determine that modulator regularly; Modularot voltage is set; Set up synchronous laser; And genlocing is set.
6, a kind of QKD system comprises:
First node and Section Point, each node has Control Software, described Control Software is used to control the operation of corresponding node, initialization and/or stabilisation and/or calibration with executive system, described first node and Section Point operationally are coupled by secure communications links, wherein, described first node is a local node, and described Section Point is a remote node;
Graphical user interface GUI, it represents the corresponding operating state of described first node and Section Point; And
Local client computer, it is near local node and operationally be coupled to local node, and is used to show GUI and the control that realizes local node and remote node via described software.
7, system according to claim 6, wherein, described local node is configured to carry out at least one stabilization procedures of selecting from following stabilization procedures group, and described group comprises: the Q laser bias is set; The Q laser pulse width is set; The Q laser is set regularly; The temperature of single photon detector SPD is set; The single photon detector sensitivity level is set; Determine that modulator regularly; Modularot voltage is set; Set up synchronous laser; And genlocing is set.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US61001804P | 2004-09-15 | 2004-09-15 | |
| US60/610,018 | 2004-09-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101040481A CN101040481A (en) | 2007-09-19 |
| CN100592679C true CN100592679C (en) | 2010-02-24 |
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Family Applications (1)
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|---|---|---|---|
| CN 200580035338 Expired - Fee Related CN100592679C (en) | 2004-09-15 | 2005-09-14 | Qkd system ambiguous remote control |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1794924A2 (en) |
| JP (1) | JP2008514118A (en) |
| CN (1) | CN100592679C (en) |
| WO (1) | WO2006031828A2 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0801408D0 (en) | 2008-01-25 | 2008-03-05 | Qinetiq Ltd | Multi-community network with quantum key distribution |
| GB0801395D0 (en) | 2008-01-25 | 2008-03-05 | Qinetiq Ltd | Network having quantum key distribution |
| WO2009093036A2 (en) * | 2008-01-25 | 2009-07-30 | Qinetiq Limited | Quantum cryptography apparatus |
| GB0801492D0 (en) | 2008-01-28 | 2008-03-05 | Qinetiq Ltd | Optical transmitters and receivers for quantum key distribution |
| GB0809045D0 (en) | 2008-05-19 | 2008-06-25 | Qinetiq Ltd | Quantum key distribution involving moveable key device |
| GB0809044D0 (en) | 2008-05-19 | 2008-06-25 | Qinetiq Ltd | Multiplexed QKD |
| GB0809038D0 (en) | 2008-05-19 | 2008-06-25 | Qinetiq Ltd | Quantum key device |
| GB0819665D0 (en) | 2008-10-27 | 2008-12-03 | Qinetiq Ltd | Quantum key dsitribution |
| GB0822253D0 (en) | 2008-12-05 | 2009-01-14 | Qinetiq Ltd | Method of establishing a quantum key for use between network nodes |
| GB0822254D0 (en) | 2008-12-05 | 2009-01-14 | Qinetiq Ltd | Method of performing authentication between network nodes |
| GB0822356D0 (en) | 2008-12-08 | 2009-01-14 | Qinetiq Ltd | Non-linear optical device |
| GB0917060D0 (en) | 2009-09-29 | 2009-11-11 | Qinetiq Ltd | Methods and apparatus for use in quantum key distribution |
| GB201020424D0 (en) | 2010-12-02 | 2011-01-19 | Qinetiq Ltd | Quantum key distribution |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5307410A (en) * | 1993-05-25 | 1994-04-26 | International Business Machines Corporation | Interferometric quantum cryptographic key distribution system |
| EP0676110B1 (en) * | 1992-12-24 | 1997-04-02 | BRITISH TELECOMMUNICATIONS public limited company | System and method for key distribution using quantum cryptography |
| CN1407739A (en) * | 2001-08-31 | 2003-04-02 | 中国科学院研究生院 | Classic signal synchronous delayed composite quantum pin issuing system and dual speed protocol |
| CN1447558A (en) * | 2002-03-25 | 2003-10-08 | 深圳市中兴通讯股份有限公司 | Quantum encryption method for realizing safety communication |
| CN1477809A (en) * | 2003-07-11 | 2004-02-25 | 清华大学 | Quantum state classical sequence rearrangement encrypition method in quantum key distribution |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5764765A (en) * | 1993-09-09 | 1998-06-09 | British Telecommunications Public Limited Company | Method for key distribution using quantum cryptography |
| EP0717895B1 (en) * | 1993-09-09 | 1998-11-25 | BRITISH TELECOMMUNICATIONS public limited company | Key distribution in a multiple access network using quantum cryptography |
| US5966224A (en) * | 1997-05-20 | 1999-10-12 | The Regents Of The University Of California | Secure communications with low-orbit spacecraft using quantum cryptography |
| US20050063547A1 (en) * | 2003-09-19 | 2005-03-24 | Audrius Berzanskis | Standards-compliant encryption with QKD |
-
2005
- 2005-09-14 JP JP2007532404A patent/JP2008514118A/en not_active Withdrawn
- 2005-09-14 WO PCT/US2005/032593 patent/WO2006031828A2/en active Application Filing
- 2005-09-14 EP EP05815920A patent/EP1794924A2/en not_active Withdrawn
- 2005-09-14 CN CN 200580035338 patent/CN100592679C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0676110B1 (en) * | 1992-12-24 | 1997-04-02 | BRITISH TELECOMMUNICATIONS public limited company | System and method for key distribution using quantum cryptography |
| US5307410A (en) * | 1993-05-25 | 1994-04-26 | International Business Machines Corporation | Interferometric quantum cryptographic key distribution system |
| CN1407739A (en) * | 2001-08-31 | 2003-04-02 | 中国科学院研究生院 | Classic signal synchronous delayed composite quantum pin issuing system and dual speed protocol |
| CN1447558A (en) * | 2002-03-25 | 2003-10-08 | 深圳市中兴通讯股份有限公司 | Quantum encryption method for realizing safety communication |
| CN1477809A (en) * | 2003-07-11 | 2004-02-25 | 清华大学 | Quantum state classical sequence rearrangement encrypition method in quantum key distribution |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101040481A (en) | 2007-09-19 |
| WO2006031828A2 (en) | 2006-03-23 |
| WO2006031828A3 (en) | 2006-08-31 |
| JP2008514118A (en) | 2008-05-01 |
| EP1794924A2 (en) | 2007-06-13 |
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