CN107294716A - Long-range quantum encryption communication system with relay - Google Patents
Long-range quantum encryption communication system with relay Download PDFInfo
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- CN107294716A CN107294716A CN201710698875.7A CN201710698875A CN107294716A CN 107294716 A CN107294716 A CN 107294716A CN 201710698875 A CN201710698875 A CN 201710698875A CN 107294716 A CN107294716 A CN 107294716A
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Classifications
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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
- H04L9/0855—Quantum cryptography involving additional nodes, e.g. quantum relays, repeaters, intermediate nodes or remote nodes
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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
- H04L9/0858—Details about key distillation or coding, e.g. reconciliation, error correction, privacy amplification, polarisation coding or phase coding
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Theoretical Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
The present invention relates to a kind of relay loaded in quantum communications optical fiber, include receiving module and sending module, quantum signal enhancing module is provided between the receiving module and sending module；Quantum, which is provided with, in the quantum signal enhancing module excites unit and quantum modulating unit；Wherein, the quantum excites unit to be used to excite the state for receiving quantum in the receiving module, improves the kinetic energy of its motion；The quantum modulating unit, for through the quantum excite unit formed after quantum quantum bit carry out quantum modulation, the quantum bit with predetermined quantum state is corresponding.Using the relay of above-mentioned technical proposal, it is possible to achieve long range transmission of quantum signal, signal will not weaken in transmitting procedure；And the encryption information of quantum signal loading will not be changed.
Description
Technical field
The present invention relates to Technique on Quantum Communication field, more particularly to a kind of long-range quantum encryption communication with relay
System.
Background technology
So-called quantum communications refer to a kind of new communication modes that information transmission is carried out using entangled quantum effect, are near
The novel crossed subject grown up for 20 years, is the new research field that quantum theory and information theory are combined.
Optical quantum communication is based primarily upon the theory of Quantum Entangled States, uses quantum teleportation（Transmission）Mode realize letter
Breath transmission.According to experimental verification, no matter how far apart two particles with Entangled State are, as long as one changes, and in addition one
It is individual also to change moment, realize that the process of optical quantum communication is as follows using this characteristic：In advance build a pair have tangle
Two particles are individually placed to communicating pair by the particle of state, and the particle with unknown quantum state and the particle of sender are carried out
Combined measurement（One kind operation）, then the particle moment of recipient cave in（Change）, cave in（Change）For certain state, this
The particle of state and sender cave in（Change）State afterwards is symmetrical, and the information of combined measurement then is passed through into classical channel
Send recipient to, reception is put carries out unitary transformation according to the information received to the particle caved in（Equivalent to reversal shift）,
It can obtain and the identical unknown quantum state of sender.
Classical communication is compared compared with optical quantum communication, and its security and high efficiency can not all be mentioned in the same breath therewith.Security-amount
Son communication " will not divulge a secret ", and the key that one is embodied in quantum cryptography is random, even if stolen taker is intercepted and captured, can not also obtain
To correct key, therefore information can not be cracked；Second, there are 2 particles of Entangled State in communicating pair hand respectively, wherein
The quantum state of one particle changes, and the quantum state of a side will change at once therewith in addition, and according to quantum theory, it is grand
Any observation and interference seen, can all change quantum state at once, cause it to cave in, therefore stealer obtained from interference due to believing
Breath has been destroyed, not original information.
But the existing experimental data for carrying out quantum communications shows, the problem of there is signal weaker during Quantum Teleportation,
Hindered so that carrying out quantum communications over long distances by reality.
The content of the invention
The technical problem to be solved in the present invention be to provide it is a kind of can in transmitting procedure quantum signal carry out it is enhanced
Long-range quantum encryption communication system with relay.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：This has the long-range quantum of relay
Cryptographic communication system includes quantum communications channel and module occurs for quantum, and module, which occurs, for the quantum is used to lead to the quantum
Believe channel quantum signal；The two ends for connecting the quantum communications channel are the first user terminal and second user end respectively；
At least one relay is serially connected with the quantum communications channel；The relay includes receiving module and sends mould
Block, is provided with quantum signal enhancing module between the receiving module and sending module；In the quantum signal enhancing module
It is provided with quantum and excites unit and quantum modulating unit；
Wherein, the quantum excites unit to be used to excite the state for receiving quantum in the receiving module, improves its motion
Kinetic energy；
The quantum modulating unit, for through the quantum excite unit formed after quantum quantum bit carry out quantum modulation,
Quantum bit with predetermined quantum state is corresponding.
Using the long-range quantum encryption communication system of above-mentioned technical proposal, it is possible to achieve long range transmission of quantum signal, letter
Number it will not weaken in transmitting procedure；And the encryption information of quantum signal loading will not be changed.
It is preferred that, the quantum modulating unit is Polarization Modulation unit；It is additionally provided with the quantum signal enhancing module
Intensity modulated unit, the intensity modulated unit excites unit to be connected with the quantum, receives the instruction of the receiving module
Triggering.
The signal strength of receiving module induced quantum, and give intensity modulated unit according to the quantum signal power of sensing and refer to
Signal is made, the intensity that need to be excited accordingly instruction is sent to quantum again and excites unit by intensity modulated unit.
It is preferred that, the receiving module and sending module are cylinder, and are split in quantum signal enhancing module
Both sides；The quantum signal enhancing module is also configured as cylinder, and the quantum signal strengthens the radius of module than described
The radius of receiving module and sending module is bigger.
It is preferred that, the surface of the receiving module and sending module uses what is used with fibre core in light communication cable
Material is identical；The surface of the quantum signal enhancing module scribbles antireflection material layers.
Brief description of the drawings
Technical scheme is further described below in conjunction with the accompanying drawings：
Fig. 1 is the long-range quantum encryption communication system structure diagram with relay of the present invention；
Fig. 2 is the internal structure schematic diagram of the relay in Fig. 1；
Fig. 3 is the contour structures schematic diagram of the relay in Fig. 1；
Wherein：1- receiving modules；2- sending modules；3- quantum signals strengthen module；301- quantum excite unit；302- quantum are adjusted
Unit processed；303- intensity modulated units；4- quantum communications channels；Module occurs for 5- quantum；The user terminals of 6- first；7- second users
End；8- relays.
Embodiment
In order to deepen the understanding of the present invention, the present invention is done below in conjunction with drawings and examples and further retouched in detail
State, the embodiment is only used for explaining the present invention, protection scope of the present invention is not constituted and limited.
As shown in figure 1, quantum communications channel 4 and amount should be included with the long-range quantum encryption communication system of relay
Module 5 occurs for son, and module 5, which occurs, for the quantum is used for the quantum signal of quantum communications channel 4；Connect the quantum
The two ends of communication channel 4 are the first user terminal 6 and second user end 7 respectively；It is serially connected with least on the quantum communications channel 4
One relay 8, as shown in Fig. 2 the relay 8 includes receiving module 1 and sending module 2, in the reception mould
Quantum signal enhancing module 3 is provided between block 1 and sending module 2；Quantum is provided with the quantum signal enhancing module 3 to swash
Bill member 301 and quantum modulating unit 302；
Wherein, the quantum excites unit 301 to be used to excite the state for receiving quantum in the receiving module 1, improves its fortune
Dynamic kinetic energy；
The quantum modulating unit 302, for through the quantum excite unit 301 formation after quantum quantum bit carry out quantum
Modulation, the quantum bit with predetermined quantum state is corresponding.
The quantum modulating unit 302 is Polarization Modulation unit；Intensity is additionally provided with the quantum signal enhancing module 3
Modulating unit 303, the intensity modulated unit 303 excites unit 301 to be connected with the quantum, receives the receiving module 1
Instruction triggers.
As shown in figure 3, the receiving module 1 and sending module 2 are cylinder, and split in quantum signal enhancing
The both sides of module 3；The quantum signal enhancing module 3 is also configured as cylinder, and the radius of quantum signal enhancing module 3 is equal
Radius than the receiving module 1 and sending module 2 is bigger.
The surface of the receiving module 1 and sending module 2 is using the material used with fibre core in light communication cable
It is identical；The surface of the quantum signal enhancing module 3 scribbles antireflection material layers.
For the ordinary skill in the art, simply the present invention is exemplarily described for specific embodiment,
The obvious present invention, which is implemented, to be not subject to the restrictions described above, and is entered as long as employing the inventive concept and technical scheme of the present invention
The improvement of capable various unsubstantialities, or it is not improved by the present invention design and technical scheme directly apply to other occasions
, within protection scope of the present invention.
Claims (4)
1. a kind of long-range quantum encryption communication system with relay, it is characterised in that include quantum communications channel and
Module occurs for quantum, and module, which occurs, for the quantum is used for the quantum communications channel quantum signal；Connect the quantum
The two ends of communication channel are the first user terminal and second user end respectively；At least one is serially connected with the quantum communications channel
Relay；The relay includes receiving module and sending module, is set between the receiving module and sending module
It is equipped with quantum signal enhancing module；Quantum, which is provided with, in the quantum signal enhancing module excites unit and quantum modulating unit；
Wherein, the quantum excites unit to be used to excite the state for receiving quantum in the receiving module, improves its motion
Kinetic energy；
The quantum modulating unit, for through the quantum excite unit formed after quantum quantum bit carry out quantum modulation,
Quantum bit with predetermined quantum state is corresponding.
2. the long-range quantum encryption communication system according to claim 1 with relay, it is characterised in that the amount
Sub- modulating unit is Polarization Modulation unit；Intensity modulated unit, the intensity are additionally provided with the quantum signal enhancing module
Modulating unit excites unit to be connected with the quantum, receives the instruction triggers of the receiving module.
3. the long-range quantum encryption communication system according to claim 1 with relay, it is characterised in that described to connect
It is cylinder to receive module and sending module, and is split in quantum signal enhancing module both sides；The quantum signal enhancing
Module is also configured as cylinder, and quantum signal enhancing module radius than the half of the receiving module and sending module
Footpath is bigger.
4. the long-range quantum encryption communication system according to claim 3 with relay, it is characterised in that described to connect
The surface of module and sending module is received using identical with the material that fibre core in light communication cable is used；The quantum signal
The surface of enhancing module scribbles antireflection material layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710698875.7A CN107294716A (en) | 2017-08-15 | 2017-08-15 | Long-range quantum encryption communication system with relay |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710698875.7A CN107294716A (en) | 2017-08-15 | 2017-08-15 | Long-range quantum encryption communication system with relay |
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| CN107294716A true CN107294716A (en) | 2017-10-24 |
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| CN201710698875.7A Pending CN107294716A (en) | 2017-08-15 | 2017-08-15 | Long-range quantum encryption communication system with relay |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1865657A1 (en) * | 2006-06-09 | 2007-12-12 | Kabushiki Kaisha Toshiba | Quantum communciation system, quantum repeater apparatus, quantum repeater method, and computer program product |
| CN106533565A (en) * | 2016-11-28 | 2017-03-22 | 工业和信息化部电信研究院 | Quantum secure communication method and apparatus |
-
2017
- 2017-08-15 CN CN201710698875.7A patent/CN107294716A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1865657A1 (en) * | 2006-06-09 | 2007-12-12 | Kabushiki Kaisha Toshiba | Quantum communciation system, quantum repeater apparatus, quantum repeater method, and computer program product |
| CN106533565A (en) * | 2016-11-28 | 2017-03-22 | 工业和信息化部电信研究院 | Quantum secure communication method and apparatus |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171024 |
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| RJ01 | Rejection of invention patent application after publication |