CN107508671A - Service communication method and device based on quantum key distribution - Google Patents
Service communication method and device based on quantum key distribution Download PDFInfo
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- CN107508671A CN107508671A CN201710712132.0A CN201710712132A CN107508671A CN 107508671 A CN107508671 A CN 107508671A CN 201710712132 A CN201710712132 A CN 201710712132A CN 107508671 A CN107508671 A CN 107508671A
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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
- H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/12—Shortest path evaluation
- H04L45/121—Shortest path evaluation by minimising delays
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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
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- Computer Networks & Wireless Communication (AREA)
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- Computer Security & Cryptography (AREA)
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Abstract
The present invention provides a kind of service communication method and device based on quantum key distribution.This method includes：Step 1, corresponded to based on business and the quantum key demand of quantum key surplus and the business in quantum key pond is possible in transmission path between source node and destination node, obtain the optimal transmission paths of the business；Step 2, the quantum key provided based on the quantum key pond between two nodes adjacent successively in the optimal transmission paths, the business realizing is from the source node to the communication of the destination node.The invention enables two nodes corresponding to each quantum key pond of the business of participation transmission at a distance of nearer, the supplement for shortening quantum key takes, so that the quantum key in quantum key pond can be augmented in time, avoid the more quantum key pond of bearer traffic or the larger business of quantum key demand corresponding to quantum key pond quantum key deficiency cause communication delay and obstruction.
Description
Technical field
The present invention relates to field of information security technology, leads to more particularly, to a kind of business based on quantum key distribution
Believe method and device.
Background technology
Quantum key distribution (Quantum Key Distribution, QKD) technology based on principle of quantum mechanics is one
Kind is configured to the quantum key that communicating pair distributes quantum key resource using the QKD terminals and QKD links of communicating pair deployment
Pond (Quantum Key Pool, QKP) for the secure communication of sensitive data technology.Fig. 1 is to utilize one in the prior art
The schematic diagram in a quantum key pond is built the QKD terminals data communication node and QKD links.Wherein, QKD links include
Quantum channel and classical channel；Quantum key pond be used to store consult between QKD terminals caused by quantum key, and be network section
Data communication terminal distribution quantum key, realizes the safe and secret communication of Network corresponding to point both sides.
Fig. 2 is secure communication network architectural framework of the prior art based on quantum key distribution.The framework wraps from bottom to top
Include QKD layers and data Layer.QKD layers include being positioned over the QKD terminals at each node and connect the QKD links of QKD terminals, each pair
Quantum key caused by consulting between QKD terminals is stored in a quantum key pond；Data Layer includes being positioned over each node
The data communication terminal at place and the data link for connecting data communication terminal, the business peace between each pair data communication terminal
Full communication distributes quantum key by the quantum key pond of corresponding service source destination node for it, then completes data encryption and data pass
It is defeated.Understand, service communication process can constantly consume the quantum key in quantum key pond.Generally, when in some quantum key pond
Quantum key amount when being less than default quantum key amount minimum value, two QKD terminals corresponding to quantum key pond can be to quantum
Pool of keys carries out quantum key supplement.Specifically, QKD terminals corresponding to the quantum key pond are connected using QKD links and augmented
Quantum key, until quantum key amount reaches default quantum key amount maximum.
But on the one hand, QKD technical merits and appointed condition are limited at this stage, and the supplement speed of quantum key resource is relatively low,
When two nodes are apart from each other corresponding to quantum key pond, the supplement used time of quantum key resource is longer.On the other hand, due to
Transmit the industry of different nodes and link carryings in quantum key amount difference and the network needed for the business encryption of different pieces of information amount
Quantity of being engaged in is different, the quantum key surplus skewness weighing apparatus in multiple quantum key ponds in network.For these reasons, hold
Easily measure in quantum key pond corresponding to carrying the more quantum key pond of portfolio or the larger business of quantum key demand
Sub-key deficiency.And quantum key deficiency can cause the time delay of service security communication and blocking rate to increase in quantum key pond
Add, and have a strong impact on the performance of network.
The content of the invention
The present invention provides a kind of service communication method and device based on quantum key distribution, to overcome in the prior art,
Quantum key pond corresponding to the more quantum key pond of bearer traffic or the larger business of quantum key demand easily occurs
The time delay and blocking rate that quantum key is insufficient and causes service security to communicate greatly increase, have a strong impact on the problem of network performance.
According to the first aspect of the invention, there is provided a kind of service communication method based on quantum key distribution, this method bag
Include：Step 1, corresponded to based on business and quantum key in quantum key pond is possible in transmission path between source node and destination node
The quantum key demand of surplus and the business, obtain the optimal transmission paths of the business；Step 2, based on it is described most
The quantum key that quantum key pond between two nodes adjacent successively provides in good transmission path, the business realizing is from described
Source node to the destination node communication.
With reference to the first possible implementation of first aspect present invention, in second of possible implementation, the step
Rapid 1 specifically includes：Step 11, based on corresponding to business between source node, destination node and the source node and the destination node
Intermediate node, obtain the business is possible to transmission path；Step 12, included based on the be possible to transmission path
The number of intermediate node, obtain the preferably possible transmission path of the business；Step 13, the quantum key based on the business needs
The quantum key surplus in quantum key pond in the amount of asking and the preferably possible transmission path, obtain the best transmission of the business
Path.
With reference to the first of first aspect present invention or second may implementation, in the third possible implementation,
The step 2 specifically includes：Using the source node as present node, along biography of the business in the optimal transmission paths
Defeated direction, the quantum provided based on the current quantum key pond between the present node and next node adjacent thereto are close
Key, the business is encrypted in the present node；Business after encryption is transmitted to the next node；Based on described
The quantum key that current quantum key pond provides, the business is decrypted in the next node；By the next node
As present node, said process is repeated, until the next node is destination node.
With reference to second of possible implementation of first aspect present invention, in the 4th kind of possible implementation, the step
Rapid 12 specifically include：Obtain the be possible to transmission path and include intermediate node number less than present count destination path as institute
State the preferably possible transmission path of business.
With reference to second or the 4th kind of possible implementation of first aspect present invention, in the 5th kind of possible implementation,
The step 13 specifically includes：Step 131, the quantum key demand based on the business and the preferably possible transmission path
Quantum key surplus in upper quantum key pond, obtain communication smoothly path；Step 132, based on the smoothly road that communicates
On footpath in quantum key pond quantum key surplus variance, obtain the optimal transmission paths of the business.
With reference to the 5th kind of possible implementation of first aspect present invention, in the 6th kind of possible implementation, the step
Rapid 131 specifically include：The quantum key surplus for obtaining quantum key pond in the preferably possible transmission path is all higher than being equal to
The path of the business quantum key demand is as the smoothly path that communicates.
With reference to the 5th kind of possible implementation of first aspect present invention, in the 7th kind of possible implementation, the step
Rapid 132 specifically include：If judge know it is described communication smoothly on path in quantum key pond quantum key surplus variance
More than variance threshold values, based on the smoothly minimum quantum key surplus on path Zhong Ge paths that communicates, the industry is obtained
The optimal transmission paths of business；If judge know it is described communication smoothly on path in quantum key pond quantum key surplus side
Difference is less than or equal to the variance threshold values, communicates smoothly that quantum key surplus is averaged on path Zhong Ge paths based on described
Value, obtain the optimal transmission paths of the business.
With reference to the 7th kind of possible implementation of first aspect present invention, in the 8th kind of possible implementation, the base
In the communication smoothly minimum quantum key surplus on path Zhong Ge paths, the optimal transmission paths of the business are obtained
Specifically include：Obtain the minimum quantum key surplus in every communication smoothly path；Obtain the minimum quantum key
Path is as optimal transmission paths corresponding to maximum quantum key surplus in surplus.
With reference to the 7th kind of possible implementation of first aspect present invention, in the 9th kind of possible implementation, the base
In the communication smoothly on path Zhong Ge paths quantum key surplus average value, obtain the best transmission road of the business
Footpath specifically includes：Obtaining in the smoothly path that communicates has the path of maximum quantum key surplus average value as optimal
Transmission path.
According to the second aspect of the invention, there is provided a kind of service communication square law device based on quantum key distribution, the dress
Put including：Optimal transmission paths acquisition module and communication module；The optimal transmission paths acquisition module, for based on business pair
Answer and quantum key surplus and the business in quantum key pond are possible in transmission path between source node and destination node
Quantum key demand, obtain the optimal transmission paths of the business；The communication module, for based on the best transmission road
The quantum key that quantum key pond between two nodes adjacent successively provides on footpath, the business realizing from the source node to
The communication of the destination node.
Service communication method and device proposed by the present invention based on quantum key distribution, by based on business corresponding source section
It is close that the quantum of quantum key surplus and the business in quantum key pond is possible in transmission path between point and destination node
Key demand, the optimal transmission paths of the business are obtained, based on two nodes adjacent successively in the optimal transmission paths
Between quantum key pond provide quantum key, the business realizing is from the source node to the communication of the destination node.This hair
The method of bright proposition causes two nodes corresponding to each quantum key pond of participation business transmission at a distance of relatively closely, to shorten quantum
The supplement of key takes, so that the quantum key in quantum key pond can be augmented in time, avoids bearer traffic
Quantum key pond quantum key deficiency corresponding to the larger business in more quantum key pond or quantum key demand causes to lead to
Believe time delay and obstruction.Further it is proposed that method cause quantum key consumption phase in each quantum key pond of whole network
When ensure that the equiblibrium mass distribution of quantum key surplus in each quantum key pond of whole network so that network performance is more stable.
Brief description of the drawings
Fig. 1 is close using the QKD terminals between a pair of data communication nodes and QKD links one quantum of structure in the prior art
The schematic diagram in key pond；
Fig. 2 is secure communication network architectural framework of the prior art based on quantum key distribution；
Fig. 3 is the service communication method flow diagram based on quantum key distribution according to the embodiment of the present invention；
Fig. 4 is the network diagram with 4 nodes according to the embodiment of the present invention；
Fig. 5 is the traffic communicator schematic diagram based on quantum key distribution according to the embodiment of the present invention.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
As shown in figure 3, according to the first aspect of the invention, there is provided a kind of service communication side based on quantum key distribution
Method, this method include：Step 1, corresponded to based on business and quantum key in transmission path is possible between source node and destination node
The quantum key demand of quantum key surplus and the business in pond, obtain the optimal transmission paths of the business；Step
2, the quantum key provided based on the quantum key pond between two nodes adjacent successively in the optimal transmission paths, the industry
It is pragmatic existing from the source node to the communication of the destination node.
In the present embodiment, due to many intermediate nodes in communication network between source node and destination node be present, therefore,
When needing from source node to send business to destination node safely, business has more transmission paths.Quantum key pond is because of carrying
Portfolio is different, business quantum key demand is different, the quantum key surplus in quantum key pond is also different.For
Consuming excessively for quantum key in the less quantum key pond of quantum key surplus is avoided, causes communication delay or obstruction,
The overall most sufficient path of quantum key surplus that quantum key pond is selected in the present embodiment is that optimal transmission paths enter industry
Business communication.
In the present embodiment, after optimal transmission paths are obtained, service communication can be carried out by optimal transmission paths.It is logical
Cross optimal transmission paths carry out service communication during, business optimal transmission paths on the way in each intermediate node first solve
It is close to re-encrypt.Wherein, during decryption, using between the intermediate node and its adjacent upper node in optimal transmission paths transmission
Quantum key pond provide quantum key；During encryption, using the intermediate node with its optimal transmission paths transmission on it is adjacent
Next node between quantum key pond provide quantum key.
Service communication method and device proposed by the present invention based on quantum key distribution, by based on business corresponding source section
It is close that the quantum of quantum key surplus and the business in quantum key pond is possible in transmission path between point and destination node
Key demand, the optimal transmission paths of the business are obtained, based on two nodes adjacent successively in the optimal transmission paths
Between quantum key pond provide quantum key, the business realizing is from the source node to the communication of the destination node.This hair
The method of bright proposition causes two nodes corresponding to each quantum key pond of participation business transmission at a distance of relatively closely, to shorten quantum
The supplement of key takes, so that the quantum key in quantum key pond can be augmented in time, avoids bearer traffic
Quantum key pond quantum key deficiency corresponding to the larger business in more quantum key pond or quantum key demand causes to lead to
Believe time delay and obstruction.Further it is proposed that method cause quantum key consumption phase in each quantum key pond of whole network
When ensure that the equiblibrium mass distribution of quantum key surplus in each quantum key pond of whole network so that network performance is more stable.
As a kind of alternative embodiment, the step 1 specifically includes：Step 11, based on source node, Su Jie corresponding to business
Point and the intermediate node between the source node and the destination node, obtain the business is possible to transmission path；Step
Rapid 12, the number of intermediate node is included based on the be possible to transmission path, obtain the business may preferably transmit road
Footpath；Step 13, the quantum key demand based on the business and it is described preferably may in transmission path quantum key pond amount
Sub-key surplus, obtain the optimal transmission paths of the business.
Fig. 4 is the network diagram with 4 nodes according to the embodiment of the present invention.As shown in Figure 4, business is saved from source
The safety of point 2, which is sent to all paths of destination node 4, to be included：Source node 2 is to destination node 4, source node 2 to intermediate node 1 to Su Jie
Point 4, each path of source node 2 to intermediate node 3 to destination node 4.
Because business during intermediate node by needing encryption and decryption, therefore, when intermediate node number is bigger, business is communicating
During need by node it is more, the time needed for service communication is longer.To avoid service communication is time-consuming from excessively increasing,
The excessive path of intermediate node need to be removed, obtaining preferably may transmission path.
The quantum key pond past is because of the portfolio difference of carrying, the quantum of business in each path of preferably possible transmission path
Key demand is different, and currently, the quantum key surplus in quantum key pond is also different.In order to avoid quantum key is remaining
Consuming excessively for quantum key in less quantum key pond is measured, communication delay or obstruction is caused, selects quantum in the present embodiment
The overall most sufficient path of the quantum key surplus of pool of keys is that optimal transmission paths carry out service communication.
As a kind of alternative embodiment, the step 2 specifically includes：Using the source node as present node, along described
Transmission direction of the business in the optimal transmission paths, based between the present node and next node adjacent thereto
The quantum key that current quantum key pond provides, the business is encrypted in the present node；By the business after encryption
Transmit to the next node；The quantum key provided based on the current quantum key pond, in the next node to described
Business is decrypted；Using the next node as present node, said process is repeated, until the next node is Su Jie
Point.
In the present embodiment, business along optimal transmission paths from source node transmit on the direction of destination node successively by source
Node, the first intermediate node, the second intermediate node ..., destination node.And complete to encrypt in source node, it is complete in middle each node
Complete to decrypt into encryption and decryption and in destination node.
As a kind of alternative embodiment, the step 12 specifically includes：Obtain during the be possible to transmission path includes
Segmentum intercalaris is counted out less than preferably possible transmission path of the present count destination path as the business.
In the present embodiment, preset number can be set as the case may be, and the present embodiment is not construed as limiting to this.Be tod from above-mentioned
Business sends to destination node 4 from the safety of source node 2 and is possible to filter out in transmission path less than preset number (preset number
Equal to path 2) as preferably possible transmission path.Preferably possible transmission path includes：Source node 2 is to destination node 4, source node
2 to intermediate node 1 to destination node 4, each path of source node 2 to intermediate node 3 to destination node 4.
As a kind of alternative embodiment, the step 13 specifically includes：Step 131, the quantum key based on the business
Quantum key surplus in quantum key pond, obtains communication smoothly path in demand and the preferably possible transmission path；
Step 132, based on it is described communication smoothly on path in quantum key pond quantum key surplus variance, obtain the business
Optimal transmission paths.
In the present embodiment, the quantum key pond that business is related in the transmission is both needed to provide quantum key resource for business
Encryption and decryption.Such as, quantum key pond corresponding to source node and the first intermediate node adjacent thereto need to provide quantum key resource with
Encrypt in source node for business and decrypted in the first intermediate node.When the quantum key resource in quantum key pond can not meet to add
During the demand of decryption, delay or obstruction occurs in the path, therefore, need to obtain each quantum key from preferable possible transmission path
Quantum key resource in pond can meet the path of business encryption and decryption demand, that is, communicate smoothly path, carry out service communication.
For example, sending business into the preferably possible transmission path of destination node 4 from the safety of source node 2 from above-mentioned, search respectively preferable
Quantum key pond (QKP2-4, QKP1-2 and QKP1-4, QKP2-3 and QKP3-4) in possible transmission path, and inquire about each amount
The quantum key surplus in sub-key pond, it is smooth as communicating to filter out the sufficient path of the quantum key in quantum key pond
Path.
In the present embodiment, communication smoothly in each path in path the quantum key pond past because carrying portfolio not
Same, business quantum key demand is different, and currently, the quantum key surplus in quantum key pond is also different.And path
The variance of quantum key surplus has reacted in the path quantum key surplus in each quantum key pond in upper quantum key pond
Difference size, can be when differing greatly or being smaller based on the difference, the quantum based on certain method choice quantum key pond
The overall most sufficient path of key surplus is as optimal transmission paths, to avoid the less quantum key pond of quantum key surplus
Middle quantum key consumes excessively, causes communication delay or obstruction.
As a kind of alternative embodiment, the step 131 specifically includes：Obtain quantum in the preferably possible transmission path
The quantum key surplus of pool of keys is all higher than the path equal to the business quantum key demand as the smoothly road that communicates
Footpath.
In the present embodiment, it is close equal to the business quantum by the way that the quantum key surplus in quantum key pond is all higher than
The path of key demand is smooth to ensure to communicate in business transmitting procedure as the smoothly path that communicates.
As a kind of alternative embodiment, the step 132 specifically includes：If judgement knows the communication smoothly on path
The variance of quantum key surplus is more than variance threshold values in quantum key pond, is communicated smoothly on path Zhong Ge paths based on described
Minimum quantum key surplus, obtain the optimal transmission paths of the business；If the communication smoothly path is known in judgement
The variance of quantum key surplus is less than or equal to the variance threshold values in upper quantum key pond, based on the smoothly road that communicates
The average value of quantum key surplus on the Zhong Ge paths of footpath, obtain the optimal transmission paths of the business.
When the variance of quantum key surplus in quantum key pond on path is larger, illustrate each quantum key pond on the path
The gap of middle quantum key surplus is larger, it is understood that there may be some quantum key surpluses are very big, and other quantum keys are remaining
Measure the situation of very little.Now, minimum key surplus can be based on, obtains optimal transmission paths.
When the variance of quantum key surplus in quantum key pond on path is smaller, illustrate each quantum key pond on the path
Middle quantum key surplus it is suitable.Now, key surplus average value can be based on, obtains optimal transmission paths.
It is described based on the smoothly minimum quantum key on path Zhong Ge paths that communicates as a kind of alternative embodiment
Surplus, the optimal transmission paths for obtaining the business specifically include：Obtain the minimum in every communication smoothly path
Sub-key surplus；Path corresponding to the maximum quantum key surplus in the minimum quantum key surplus is obtained as most
Good transmission path.
In the present embodiment, when the communication, smoothly the variance of quantum key surplus is big in quantum key pond on path
When variance threshold values, the maximum path of minimum quantum key surplus is selected as optimal transmission paths, it is minimum to avoid choosing
The less path of quantum key surplus further consumes resource.
It is described based on the smoothly quantum key surplus on path Zhong Ge paths that communicates as a kind of alternative embodiment
Average value, the optimal transmission paths for obtaining the business specifically include：Obtaining in the smoothly path that communicates has maximum
The path of quantum key surplus average value is as optimal transmission paths.
In the present embodiment, when the communication, smoothly the variance of quantum key surplus is small in quantum key pond on path
When equal to variance threshold values, the maximum path of quantum key surplus average value is selected as optimal transmission paths, to avoid selecting
The less path of taken amount sub-key surplus average value further consumes resource.
As shown in figure 5, according to the second aspect of the invention, there is provided a kind of service communication method based on quantum key distribution
Device, the device include：Optimal transmission paths acquisition module and communication module；The optimal transmission paths acquisition module, is used for
Corresponded to based on business be possible between source node and destination node in transmission path in quantum key pond quantum key surplus and
The quantum key demand of the business, obtain the optimal transmission paths of the business；The communication module, for based on described
The quantum key that quantum key pond between two nodes adjacent successively provides in optimal transmission paths, the business realizing is from institute
State communication of the source node to the destination node.
Traffic communicator proposed by the present invention based on quantum key distribution, by optimal transmission paths acquisition module,
Corresponded to based on business be possible between source node and destination node in transmission path in quantum key pond quantum key surplus and
The quantum key demand of the business, the optimal transmission paths of the business are obtained, by communication module, based on described optimal
The quantum key that quantum key pond between two nodes adjacent successively provides in transmission path, the business realizing is from the source
Node to the destination node communication.Device proposed by the present invention causes corresponding to each quantum key pond that participation business is transmitted
At a distance of relatively near, the supplement for shortening quantum key takes for two nodes so that the quantum key in quantum key pond can and
When augmented, avoid and measured corresponding to the more quantum key pond of bearer traffic or the larger business of quantum key demand
Sub-key pond quantum key deficiency causes communication delay and obstruction.Further it is proposed that device whole network is respectively measured
Quantum key consumption is suitable in sub-key pond, ensure that the equilibrium of quantum key surplus in each quantum key pond of whole network
Distribution so that network performance is more stable.
As a kind of alternative embodiment, the optimal transmission paths acquisition module includes：Be possible to transmission path obtains
Unit, due to based on the intermediate node corresponding to business between source node, destination node and the source node and the destination node,
Obtain the business is possible to transmission path；Preferably possible transmission path acquiring unit, is possible to transmit based on described
Path includes the number of intermediate node, obtains the preferably possible transmission path of the business；Optimal transmission paths acquiring unit, use
Quantum key in quantum key pond in the quantum key demand based on the business and the preferably possible transmission path remains
Surplus, obtain the optimal transmission paths of the business.
As a kind of alternative embodiment, the communication module is specifically used for using the source node as present node, along institute
Transmission direction of the business in the optimal transmission paths is stated, based between the present node and next node adjacent thereto
Current quantum key pond provide quantum key, the business is encrypted in the present node；By the industry after encryption
Business is transmitted to the next node；The quantum key provided based on the current quantum key pond, in the next node to institute
The business of stating is decrypted；Using the next node as present node, said process is repeated, until the next node is Su Jie
Point.
As a kind of alternative embodiment, it is described preferably may transmission path acquiring unit be specifically used for obtaining it is described it is all can
Energy transmission path includes intermediate node number and is less than preferably possible transmission path of the present count destination path as the business.
As a kind of alternative embodiment, the optimal transmission paths acquisition module includes：Communicate smooth path acquiring unit,
The quantum key in quantum key pond in the quantum key demand based on the business and the preferably possible transmission path
Surplus, obtain communication smoothly path；Optimal transmission paths acquiring unit, for smoothly being measured based on the communication on path
The variance of quantum key surplus in sub-key pond, obtain the optimal transmission paths of the business.
As a kind of alternative embodiment, the smooth path acquiring unit of communication may preferably pass specifically for acquisition is described
The quantum key surplus in quantum key pond is all higher than the path conduct equal to the business quantum key demand in defeated path
Communicate smoothly path.
As a kind of alternative embodiment, if the optimal transmission paths acquiring unit is specifically used for judging to know the communication
Smoothly the variance of quantum key surplus is more than variance threshold values in quantum key pond on path, based on the smoothly road that communicates
Minimum quantum key surplus on the Zhong Ge paths of footpath, obtain the optimal transmission paths of the business；If judgement is known described logical
Smoothly the variance of quantum key surplus is less than or equal to the variance threshold values to letter in quantum key pond on path, based on described
Communication smoothly on path Zhong Ge paths quantum key surplus average value, obtain the optimal transmission paths of the business.
As a kind of alternative embodiment, it is suitable that the optimal transmission paths acquiring unit is specifically used for the communication of acquisition every
The minimum quantum key surplus in smooth path；Obtain the maximum quantum key surplus in the minimum quantum key surplus
Corresponding path is as optimal transmission paths.
As a kind of alternative embodiment, the optimal transmission paths acquiring unit is specifically used for obtaining the communication smoothly
The path with maximum quantum key surplus average value is as optimal transmission paths in path.
Finally, method of the invention is only preferable embodiment, is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements made etc., the protection of the present invention should be included in
Within the scope of.
Claims (10)
- A kind of 1. service communication method based on quantum key distribution, it is characterised in that including：Step 1, corresponded to based on business and be possible in transmission path that quantum is close in quantum key pond between source node and destination node The quantum key demand of key surplus and the business, obtain the optimal transmission paths of the business；Step 2, the quantum based on the quantum key pond offer between two nodes adjacent successively in the optimal transmission paths is close Key, the business realizing is from the source node to the communication of the destination node.
- 2. according to the method for claim 1, it is characterised in that the step 1 specifically includes：Step 11, based on the middle node corresponding to business between source node, destination node and the source node and the destination node Point, obtain the business is possible to transmission path；Step 12, the number of intermediate node is included based on the be possible to transmission path, obtains the preferable possibility of the business Transmission path；Step 13, the quantum key demand based on the business and it is described preferably may in transmission path quantum key pond amount Sub-key surplus, obtain the optimal transmission paths of the business.
- 3. method according to claim 1 or 2, it is characterised in that the step 2 specifically includes：Using the source node as present node, along transmission direction of the business in the optimal transmission paths, based on institute The quantum key that the current quantum key pond between present node and next node adjacent thereto provides is stated, works as prosthomere described The business is encrypted point；Business after encryption is transmitted to the next node；Based on the current quantum key pond The quantum key of offer, the business is decrypted in the next node；Using the next node as present node, said process is repeated, until the next node is destination node.
- 4. according to the method for claim 2, it is characterised in that the step 12 specifically includes：Obtain the be possible to transmission path and include intermediate node number less than present count destination path as the business Preferably may transmission path.
- 5. the method according to claim 2 or 4, it is characterised in that the step 13 specifically includes：Step 131, the quantum key demand based on the business and it is described preferably may be in transmission path in quantum key pond Quantum key surplus, obtain communication smoothly path；Step 132, based on the communication smoothly on path in quantum key pond quantum key surplus variance, described in acquisition The optimal transmission paths of business.
- 6. according to the method for claim 5, it is characterised in that the step 131 specifically includes：The quantum key surplus for obtaining quantum key pond in the preferably possible transmission path is all higher than being equal to the portfolio The path of sub-key demand is as the smoothly path that communicates.
- 7. according to the method for claim 5, it is characterised in that the step 132 specifically includes：If judgement knows that smoothly the variance of quantum key surplus is more than variance threshold in quantum key pond on path for the communication Value, based on the communication smoothly minimum quantum key surplus on path Zhong Ge paths, obtain the optimal biography of the business Defeated path；If judgement knows that smoothly the variance of quantum key surplus is less than or equal in quantum key pond on path for the communication The variance threshold values, based on the communication smoothly on path Zhong Ge paths quantum key surplus average value, described in acquisition The optimal transmission paths of business.
- 8. according to the method for claim 7, it is characterised in that described to be communicated smoothly on path Zhong Ge paths based on described Minimum quantum key surplus, the optimal transmission paths for obtaining the business specifically include：Obtain the minimum quantum key surplus in every communication smoothly path；Path corresponding to the maximum quantum key surplus in the minimum quantum key surplus is obtained as best transmission road Footpath.
- 9. according to the method for claim 7, it is characterised in that described to be communicated smoothly on path Zhong Ge paths based on described The average value of quantum key surplus, the optimal transmission paths for obtaining the business specifically include：Obtaining in the smoothly path that communicates has the path of maximum quantum key surplus average value as best transmission road Footpath.
- A kind of 10. traffic communicator based on quantum key distribution, it is characterised in that including：Optimal transmission paths obtain mould Block and communication module；The optimal transmission paths acquisition module, it is possible to transmit road between source node and destination node for corresponding to based on business The quantum key demand of quantum key surplus and the business in quantum key pond on footpath, obtain the optimal biography of the business Defeated path；The communication module, for being carried based on the quantum key pond between two nodes adjacent successively in the optimal transmission paths The quantum key of confession, the business realizing is from the source node to the communication of the destination node.
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