CN104516816A - Method for testing key devices in quantum key distribution system - Google Patents
Method for testing key devices in quantum key distribution system Download PDFInfo
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- CN104516816A CN104516816A CN201310468678.8A CN201310468678A CN104516816A CN 104516816 A CN104516816 A CN 104516816A CN 201310468678 A CN201310468678 A CN 201310468678A CN 104516816 A CN104516816 A CN 104516816A
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Abstract
The invention belongs to the quantum secret communication technical field and provides a method for testing key devices in a quantum key distribution system. The method comprises the following steps of step 1, determining the key devices in the quantum key distribution system which needs to be tested and key test parameters of every key device; step 2, selecting main change parameters of the key test parameters and enabling other parameters to serve as from change parameters; step 3, setting a value of every main change parameter through a man-machine control interface and testing the from change parameters; step 4, writing test data into a database; step 5, performing analysis on the test data in the database and display an analysis result; step 6, judging the analysis result and returning to the step 3 to continue to test if necessary; step 7, performing statistical analysis on the test data in the database and obtaining a test conclusion. According to the method for testing the key devices in the quantum key distribution system, the key test parameters are controlled based on the result of the analysis on the test data and accordingly the blindness in a test is eliminated to a certain extent, the test efficiency is improved, and the test cost is reduced.
Description
Technical field
The invention belongs to Quantum Secure Communication field, be specifically related to Primary Component method of testing in a kind of quantum key distribution system.
Background technology
Quantum communications are novel crossed subjects that recent two decades grows up, and are the new research fields that quantum theory and information theory combine.Recently this subject progressively moves towards experiment from theory, and to practical development, the information transmission of highly effective and safe receives the concern of people day by day.
Physically, under quantum communications can be understood to be in physics limit, utilize the high performance communication that quantum effect realizes.In information science, we then think quantum communications be utilize quantum-mechanical ultimate principle (as quantum state can not cloning mechanisms and quantum state preparation to collapse character etc.) or utilize the quantized system particular attributes such as quantum state Teleportation, and the method measured of quantum completes the information transmission between two places.
Quanta cryptology technique based on quantum key distribution (QKD) agreement is one of most important practical application of present stage quantum communications.Traditional cryptography is the cipher system based on mathematics, and quantum cryptography is based on quantum mechanics, and its security is based upon uncertainty principle, can not the cloning and on the physical characteristics such as quantum coherence, be proved to be to be perfectly safe of quantum.
QKD system is a kind of quantum communication system based on QKD agreement, and the not reproducible measurement due to the quantum information wherein generating, transmit and receive determines the singularity that QKD system testing is different from classical communication system testing.
On the one hand, QKD the results of running is the result influencing each other, mutually restrict between each Primary Component in QKD system and between each technical indicator of Primary Component.Such as detectivity is abnormal, be likely what the effective gate-width reduction of optical source wavelength exception, bottom width increasing or detector caused, therefore need to monitor in real time these indexs and test, by the statistical study of test data is found and verify between each Primary Component and Primary Component each technical indicator between correlativity, to find system defect, debug system performance and to improve system effectiveness.
On the other hand, the difficulty prepared due to present stage quantum signal makes quantum signal preparation cost far exceed classical signals preparation cost, which dictates that the testing cost of QKD system is far longer than the testing cost of classical communication system.
The test of current QKD system ignores above-mentioned singularity, its method mostly is the test step by step method of the classical communication system continuing to continue to use, namely successively individual equipment is tested, and after having tested respectively, also needs to carry out unified test to each device after composition quantum key distribution system.Due to the singularity of QKD system, this test step by step method can cause following consequence:
One is owing to ignoring the impact of the correlativity in system between each Primary Component on the results of running, and make its test process lack systematicness, test result lacks systematic analysis, thus makes the test result of acquisition often have one-sidedness.
Two is the number of times considerably increasing repeated test, wastes the time, considerably increases testing cost.
Therefore, to those skilled in the art, find Primary Component method of testing in a kind of suitable QKD system and become problem demanding prompt solution.
Summary of the invention
For the problems referred to above, the present invention proposes Primary Component method of testing in a kind of quantum key distribution system, comprises the following steps:
Step one: determine to need the Primary Component in the quantum key distribution system of test and the crucial test parameter of each Primary Component;
Step 2: select main transformer parameter in crucial test parameter, all the other parameters are as from variable element;
Step 3: the value being arranged each main transformer parameter by Human-machine Control interface, tests from variable element;
Step 4: by test data write into Databasce;
Step 5: test data in analytical database, display analysis result;
Step 6: judge analysis result, returns step 3 if necessary and continues test;
Step 7: statistical study is carried out to all test datas in database, draws test result.
Primary Component in the quantum key distribution system of the needs test in described step one at least comprises following one or more: single-photon detector, inveigles state light source, optical module, key negotiation module; It needs the crucial test parameter of test at least to comprise following one or more: effective gate-width of single-photon detector, dark counting, detectivity, inveigle bottom width, halfwidth, the wavelength of state light source, the light loss of optical module, and the one-tenth code check of key negotiation module, error rate and feedback efficiency.
Select the method for main transformer parameter to be in described step 2: if the crucial test parameter of a Primary Component is more than one, then in the parameter with correlativity to major general's test parameter as main transformer parameter; If a Primary Component only has a crucial test parameter, then this Primary Component does not set main transformer parameter.
Test in described step 3 and from the method for variable element be: set up the test platform with Human-machine Control interface, by the value of the Human-machine Control interface setting main transformer parameter of test platform, thus control the main transformer parameter of Primary Component, when the main transformer parameter of each Primary Component is determined, test from variable element.
Test data in described step 4 is the value of main transformer parameter corresponding in testing each time and the test value from variable element.
In described step 5, the method for analyzing test data is: by the correlativity of analysis of key test parameter, particularly functional crucial test parameter and can correlativity between the crucial test parameter of representative amount quantum key distribution system performance, analyzes the statistical property of each crucial test parameter at each interval.
Further, in described step 6 to the method that analysis result judges be: according to the correlativity of the crucial test parameter obtained in step 5 and each crucial test parameter statistical property at each interval, judge the integrality of test data in database, with reference to test purpose, if find to also have the main transformer parameter value combination needing test, then return step 3 and continue test.
Preferably, according to the test result obtained in test target and described step 7, if need test further, then return step 2, change main transformer parameter, continues test.
The invention has the beneficial effects as follows:
1. arrange main transformer parameter by Human-machine Control interface, only test is from variable element, it reduces the complicacy of test process;
2. based on the analysis result to test data, control crucial test parameter, eliminate the blindness in test to a certain extent, improve testing efficiency, reduce testing cost;
3. the test data by recording in database, the correlativity between each crucial test parameter analyzing correlativity between each Primary Component and same Primary Component, which increases reliability and the credibility of test result.
Accompanying drawing explanation
Fig. 1 QKD system human-computer interactive control test platform architecture figure.
Primary Component method of testing process flow diagram in Fig. 2 quantum key distribution system.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail.
For realizing this patent scheme, in this patent embodiment, set up QKD system human-computer interactive control test platform as shown in Figure 1.This test platform builds in the QKD terminal of the correspondence realizing quantum key distribution in QKD network, and it mainly forms and comprises QKD equipment, key negotiation module, classical gateway, human-computer interactive control interface, test database and data analysis module.QKD equipment, key negotiation module and classical gateway are the intrinsic module of QKD terminal.Human-computer interactive control interface is used for the value by the related test parameters of each Primary Component of human-computer interactive control QKD equipment in test process; The value of test parameter corresponding in test database record test process and test value; Data analysis module carries out data analysis and statistics to the test data in database, in test process, the value of related test parameters provides reference, and by obtaining test result to the analysis of test data and statistics.
Accompanying drawing 2 is Primary Component method of testing process flow diagram in the present embodiment quantum key distribution system.By reference to the accompanying drawings 2 we by the specific implementation step of Primary Component method of testing in the present embodiment quantum key distribution system, details are as follows:
1. determine to need the Primary Component in the QKD system of test and the crucial test parameter of each Primary Component;
Need the Primary Component in the QKD system of test at least to comprise following one or more: single-photon detector, inveigle state light source, optical module, key negotiation module; It needs the crucial test parameter of test at least to comprise following one or more: effective gate-width of single-photon detector, dark counting, detectivity, inveigle bottom width, halfwidth, the wavelength of state light source, the light loss of optical module, and the one-tenth code check of key negotiation module, error rate and feedback efficiency.
In the present embodiment, the Primary Component needing test is single-photon detector and key negotiation module, and crucial test parameter is effective gate-width of single-photon detector, dark counting and detectivity, and the one-tenth code check of key negotiation module and error rate.
2. in crucial test parameter, select main transformer parameter, all the other parameters are as from variable element;
In the present embodiment, using effective gate-width of single-photon detector in above-mentioned crucial test parameter as main transformer parameter, all the other parameters are as from variable element.
3. the value of each main transformer parameter is set by Human-machine Control interface, tests from variable element;
Be that single-photon detector in QKD system sets different effective gate-widths, operational system by human-computer interactive control interface, test all the other from variable element.
4. by test data write into Databasce;
Set up corresponding database table, the test value from variable element of the setting value of main transformer parameter and correspondence thereof is write test database.
5. test data in analytical database, display analysis result;
According to the test data recorded in test database, the correlativity of computational analysis each crucial test parameter value above-mentioned, correlativity particularly between functional crucial test parameter and the crucial test parameter that can represent QKD system performance, analyzes the statistical property of each crucial test parameter at each interval.
In the present embodiment, emphatically effective gate-width of analysis list photon detector, dark counting and detectivity these three functional crucial test parameters and the correlativity become between code check of key negotiation module that can represent QKD system performance.If find the value of effective gate-width parameter and become code check dependence on parameter comparatively strong, then according to test data analysis statistical property between the two.
6. pair analysis result judges, returns step 3 if necessary and continues test;
Test data is being carried out in the process of analytic statistics, if find that the test data of crucial test parameter (the particularly main transformer parameter) interval obtained is imperfect, with reference to test purpose, if find to also have the main transformer parameter value combination needing test, then return step 3 and continue test.
7. all test datas in pair database carry out statistical study, draw test result.
Overall analytic statistics is carried out to all test datas in database, according to test target, draws test result; If need test further, then return step 2, change main transformer parameter, continues test.
It should be noted that above-mentioned specific embodiment is exemplary, under above-mentioned instruction of the present invention, those skilled in the art can carry out various improvement and distortion on the basis of above-described embodiment, and these improve or distortion drops in protection scope of the present invention.
It will be understood by those skilled in the art that specific descriptions are above to explain object of the present invention, not for limiting the present invention.Protection scope of the present invention is by claim and equivalents thereof.
Claims (8)
1. a Primary Component method of testing in quantum key distribution system, is characterized in that, comprise the following steps:
Step one: determine to need the Primary Component in the quantum key distribution system of test and the crucial test parameter of each Primary Component;
Step 2: select main transformer parameter in crucial test parameter, all the other parameters are as from variable element;
Step 3: the value being arranged each main transformer parameter by Human-machine Control interface, tests from variable element;
Step 4: by test data write into Databasce;
Step 5: test data in analytical database, display analysis result;
Step 6: judge analysis result, returns step 3 if necessary and continues test;
Step 7: statistical study is carried out to all test datas in database, draws test result.
2. Primary Component method of testing in a kind of quantum key distribution system as claimed in claim 1, it is characterized in that, Primary Component in the quantum key distribution system of the needs test in described step one at least comprises following one or more: single-photon detector, inveigle state light source, optical module, key negotiation module; It needs the crucial test parameter of test at least to comprise following one or more: effective gate-width of single-photon detector, dark counting, detectivity, inveigle bottom width, halfwidth, the wavelength of state light source, the light loss of optical module, and the one-tenth code check of key negotiation module, error rate and feedback efficiency.
3. Primary Component method of testing in a kind of quantum key distribution system as claimed in claim 1, it is characterized in that, select the method for main transformer parameter to be in described step 2: if the crucial test parameter of a Primary Component is more than one, then in the parameter with correlativity to major general's test parameter as main transformer parameter; If a Primary Component only has a crucial test parameter, then this Primary Component does not set main transformer parameter.
4. Primary Component method of testing in a kind of quantum key distribution system as claimed in claim 1, it is characterized in that, test in described step 3 and from the method for variable element be: set up the test platform with Human-machine Control interface, by the value of the Human-machine Control interface setting main transformer parameter of test platform, thus control the main transformer parameter of Primary Component, when the main transformer parameter of each Primary Component is determined, test from variable element.
5. Primary Component method of testing in a kind of quantum key distribution system as claimed in claim 1, is characterized in that, the test data in described step 4 is the value of main transformer parameter corresponding in testing each time and the test value from variable element.
6. Primary Component method of testing in a kind of quantum key distribution system as claimed in claim 1, it is characterized in that, in described step 5, the method for analyzing test data is: by the correlativity of analysis of key test parameter, particularly functional crucial test parameter and can correlativity between the crucial test parameter of representative amount quantum key distribution system performance, analyzes the statistical property of each crucial test parameter at each interval.
7. Primary Component method of testing in a kind of quantum key distribution system as claimed in claim 6, it is characterized in that, in described step 6 to the method that analysis result judges be: according to the correlativity of the crucial test parameter obtained in step 5 and each crucial test parameter statistical property at each interval, judge the integrality of test data in database, with reference to test purpose, if find to also have the main transformer parameter value combination needing test, then return step 3 and continue test.
8. Primary Component method of testing in a kind of quantum key distribution system as claimed in claim 1, it is characterized in that: according to the test result obtained in test target and described step 7, if need test further, then return step 2, change main transformer parameter, continues test.
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| CN106789036A (en) * | 2017-01-18 | 2017-05-31 | 中国人民解放军国防科学技术大学 | Towards the quantum key distribution system Method of Physical Modeling of safety analysis |
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