CN105959094A - Down-sampling multi-bit true random password optical generation device - Google Patents

Down-sampling multi-bit true random password optical generation device Download PDF

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Publication number
CN105959094A
CN105959094A CN201610270695.4A CN201610270695A CN105959094A CN 105959094 A CN105959094 A CN 105959094A CN 201610270695 A CN201610270695 A CN 201610270695A CN 105959094 A CN105959094 A CN 105959094A
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multidigit
optical
sampling
digital converter
analog
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CN105959094B (en
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王云才
李璞
孙媛媛
刘香莲
易小刚
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Taiyuan University of Technology
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/001Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using chaotic signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0861Generation of secret information including derivation or calculation of cryptographic keys or passwords
    • H04L9/0869Generation of secret information including derivation or calculation of cryptographic keys or passwords involving random numbers or seeds

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

The invention relates to a down-sampling multi-bit true random password optical generation device, a mode-locked pulse laser outputs and loads to an all-optical switch control signal input end, continuous chaotic optical signals outputted by a laser chaos entropy source are inputted to a signal detection port of the all-optical switch, the all-optical switch completes the down-sampling of the chaotic optical signals, a chaotic optical pulse sequence is obtained, the idle noise of the chaotic optical pulse sequence is filtered through an optical band pass filter, and the chaotic optical pulse sequence is divided into two ways: one way is injected to a fast photodetector I through a fiber delay line and is inputted to the positive end of a mult-bit analog-to-digital converter, and the other way is inputted to a fast photodetector II and is loaded to the negative end of the mult-bit analog-to-digital converter, at last, all valid bit parallel output ports of the mult-bit analog-to-digital converter output a multi-channel high speed real-time true random password sequence. The real-time code rate can reach more than 100 Gbps, so that the present and future need of high speed secret network communication can be greatly met.

Description

A kind of down-sampling multidigit truly random password optics generator
Technical field
Present invention password generation device truly random with one is relevant, especially a kind of down-sampling multidigit truly random password optics Generator, it is adaptable to the field such as cryptography, information security.
Background technology
Information network security is directly connected to numerous aspects such as national security, trade secret, individual privacy.The U.S. in 2013 The exposure of " prism plan ", has exposed and can steal other country's vital strategic secrets by communication network technology;Meanwhile, the world is also exposed each State's technology short slab in terms of safety information product.
Password is the last barrier ensured information safety.The most commonly used pseudorandom cipher based on algorithm is raw at present One-tenth technology, manufactures high speed pseudorandom cipher equipment.But as its name, it is pseudorandom, it is impossible to ensure being perfectly safe of communication, It it is the root that extensive password takes place frequently according to leakage event in recent years.Different from pseudo random techniques, utilize physical accidental process conduct Entropy source, can produce the truly random password that cannot be cracked, and fundamentally stops information leakage event and occurs.But, existing very with Secret code product mainly extracts truly random password from thermal noise, oscillator jitter etc., is limited to entropy source bandwidth bottleneck, its code check It is in Mb/s magnitude, it is impossible to meet the requirement of present information high-speed transfer.
Chaotic laser light signal has significantly random fluctuation characteristic, and bandwidth may be up to GHz magnitude.Employing laser chaos is physics Entropy source, is expected to build the truly random cipher code generator of high speed in conjunction with certain random cipher extracting method, has obtained since 2008 The extensive concern of countries in the world research worker.But, except at first technology 1 [Nat. Photon., vol. 2, pp. 728- 732,2008] truly random with at reports such as first technology 2 [Opt. Express, 21 (17): 20452-20462,2013] Code is outside generation in real time, and major part research is more theoretic discussion, and its method is all the thing by collecting experiment The time series of reason process carries out off-line process and realizes.
So far, the present inventor place seminar utilizes the truly random cipher code generator constructed by laser chaos (formerly Technology 2:[Opt. Express, 21 (17): 20452-20462,2013]) still remain the most truly random current password The real time rate of generator records 4.5 Gb/s the soonest.Limit current truly random password generation device real-time code rate and enter one The core technology bottleneck that step promotes is: " electronic bottleneck " that electronics ADC faces.Specifically, prior art is all to mix continuously Ignorant optical signal is converted to the continuous signal of telecommunication, utilizes electronics ADC to sample the chaos signal of telecommunication, quantifies and follow-up in full electrical domain The all processes such as process.When electronics ADC carries out sampling processing to signal, completed by sample-hold circuit, outside needs Portion's electricity clock drives;And the most most advanced electric clock work in the range of MHz frequency time also there is the big of more than ps magnitude Amplitude Aperture Jitter, along with the rising of operating frequency, this shake is in referring to that code type deteriorates.Which results in the response of current electricity ADC Speed is in the electronic bottleneck of below Gb/s more.In addition, existing truly random cipher code generator is both needed to use subsequent treatment mistake Journey is to ensure its random quality, and when working in Mb/s, electricity clock jitter is insignificant.But, want to allow it work in Gb/s work During frequency, the existence of electricity clock jitter makes the time synchronized between succeeding processing elements become the technology wide gap being difficult to go beyond.
Present communications speed has reached 10 Gb/s, and 40 Gb/s technology the most just reach its maturity.' one-time pad ' according to Shannon Encryption theory, it is to be ensured that the reality of the truly random password of the high speed requiring speed matched that is perfectly safe of current information transmission Time, produce online.Regrettably, real-time code rate this target of energy moment that current truly random password generation technology has possessed still has phase Work as distance, it is impossible to ensure that present communications is perfectly safe, be more insufficient for the safety need of following secret communication.
Summary of the invention
The concrete technical problems that the invention solves the problems that is the problem that existing truly random password produces that real-time code rate is not enough, and carries For a kind of down-sampling multidigit truly random password optics generator.
In order to solve the problems referred to above, the technical solution used in the present invention is as follows.
A kind of down-sampling multidigit truly random password optics generator, including Mode-locked laser device, laser chaos entropy Source, all-optical switch, optical band pass filter, 3-dB photo-coupler, fibre delay line, fast optical detectors I, Quick photoelectric are visited Survey device II and multidigit analog-digital converter;It is characterized in that:
Described Mode-locked laser device output Gao Zhongyingf, time jitter be in the ultrashort light pulse sequence of fs magnitude, be loaded into complete The control signal input of photoswitch, controls the break-make of all-optical switch;The continuous chaos light letter of laser chaos entropy source output simultaneously Number by all-optical switch detectable signal end input, under control signal effect, all-optical switch completes to adopt under chaos optical signal Sample, output repetition rate and ultrashort pulse sequence frequencyfThe light pulse sequence that consistent but peak power chaos rises and falls, sampling Rear acquisition chaos light pulse sequence, after optical band pass filter filters unused noise, is divided into two-way through 3-dB photo-coupler: a road Inject fast optical detectors I through fibre delay line and be converted to the signal of telecommunication, be input to the anode of multidigit analog-digital converter;Another road Directly input fast optical detectors II and be converted to the signal of telecommunication, be loaded into the negative terminal of multidigit analog-digital converter;Then by multidigit mould Whole significance bit parallel output ports of number converterd 0d 1d 2…、d 62d 63The real-time truly random cipher component of output multi-channel high speed Row.
The additional technical feature of technique scheme is as follows.
Described Mode-locked laser device output Gao Zhongyingf, time jitter is in the ultrashort light pulse sequence of fs magnitudefLittle 80% bandwidth in laser chaos entropy source output chaotic signal.
The time span of described fibre delay line is repetitionfThe integral multiple in corresponding cycle.
Described multidigit analog-digital converter is free from the parallel output type multidigit analog-digital converter of sample-hold circuit, and it is also One in row output type 8,16,32 and 64 analog-digital converters.
The real-time code rate of the real-time truly random keying sequence of described high speed by whole number of significant digit of multidigit analog-digital converter and RepetitionfProduct determine.
Realize a kind of down-sampling multidigit truly random password optics generator that the invention described above is provided, produce with existing random code Raw technology is compared, and its advantage is as follows with good effect.
First, do not exist periodically, overcome the information leakage difficult problem that pseudo-noise code generator natural period property causes.
Second, real-time code rate is up to hundred more than Gbps magnitudes, existing truly random cipher code generator real-time code rate is improve Two orders of magnitude, greatly meet the demand of the current and future of high speed security network communication.
3rd, the sampling of the real random code generator of the present invention and quantizing process are carried out in area of light and electrical domain respectively, are not required to The electric clock participation that Aperture Jitter is serious, thus overcome the electronic jitter rate limit that electricity ADC faces.
4th, the multidigit real random code generator quantizing process of the present invention can retain whole significance bit, directly output is excellent The truly random password of matter, no longer numerous and diverse subsequent processes and the technology abandoning highest significant position as necessary to existing similar technique Defect, effectively prevent the synchronization challenges between subsequent processes high speed electronic component, it is adaptable to contemporary cryptology and guarantor The fields such as close communication.
Accompanying drawing explanation
Fig. 1 is the structural representation of apparatus of the present invention.
In figure: 1: Mode-locked laser device;2: laser chaos entropy source;3: all-optical switch;4: optical band pass filter;5:3-dB Photo-coupler;6: fibre delay line;7: fast optical detectors I;8: fast optical detectors II;9: parallel output type multidigit mould Number converter.
Fig. 2 is the continuous chaotic signal sequential chart of laser chaos entropy source of the present invention output.
Fig. 3 is the ultrashort pulse sequence timing diagram of Mode-locked laser device of the present invention output.
Fig. 4 is the chaos pulse sequence sequential chart after the sampling of all-optical switch of the present invention output.
Fig. 5 is the real-time truly random keying sequence two dimension point diagram of high speed of the present invention.
Detailed description of the invention
Below the detailed description of the invention of the present invention is further illustrated.
Implement one down-sampling multidigit of the present invention truly random password optics generator, utilize mode-locked laser to produce Gao Zhongying, the ultrashort light pulse sequence of ultralow shake (fs magnitude) replace the great electronic clock of Aperture Jitter as triggering letter Number, utilize all-optical switch to complete the sampling to chaos optical signal in full area of light;Then, utilize without sample-hold circuit Parallel output pattern password transducer is opposed, and it carries out self-dalay quantization encoding, produces and has the truly random of high speed real time rate Password.
In traditional sense or usual manner, those skilled in the relevant art are to utilize electronic clock as triggering letter Number, utilize electronics ADC that the chaos signal of telecommunication is sampled in full electrical domain, quantify and all processes such as subsequent treatment.Due to electricity The existence of clock Aperture Jitter (more than ps magnitude), there is serious electronic jitter, leads in the front-end sampling-holding circuit of electronics ADC The real time rate causing current real random code generator is in below 5Gb/s.
The present invention jump out this area research worker use in full electrical domain, chaotic signal is sampled, the think of of quantification treatment Dimension fixed pattern, by real for the high speed that all-optical switch and the parallel output type multi-bit ADC driven without electronic clock are applied to random cipher Time produce, the real-time code rate of existing real random code generator is improve at least two magnitude, does not expects and also could not predict There is the most significantly effect.The present inventor place seminar pays close attention to truly random cipher code generator research neck always over 10 years The progress in territory and cutting edge technology, so far, be not yet found to have any related researcher in view of by all-optical switch with Parallel output type multi-bit ADC without sample-hold circuit, without electricity clock induction is applied to the high speed of random code and produces in real time Raw.
A kind of down-sampling multidigit truly random password optics generator provided by the present invention, it is characterised in that by locked mode arteries and veins Rush laser instrument 1, laser chaos entropy source 2, all-optical switch 3, optical band pass filter 4,3-dB photo-coupler 5, fibre delay line 6, fast Speed photodetector I 7, fast optical detectors II 8, multidigit analog-digital converter 9 are constituted;Mode-locked laser device 1 exports height Repetitionf, time jitter be in the ultrashort light pulse sequence of fs magnitude, be loaded into the control signal input of all-optical switch 3, thus Control the break-make of all-optical switch 3;Meanwhile, the spy of the continuous chaos optical signals all-optical switch 3 of laser chaos entropy source 2 output Survey signal end inputs, and under the effect of control signal (ultrashort light pulse sequence), all-optical switch 3 can complete chaos optical signal Down-sampling, output repetition rate and ultrashort pulse sequence frequencyfThe light pulse sequence that consistent but peak power chaos rises and falls (chaos light pulse sequence);The chaos light pulse sequence obtained after sampling is after optical band pass filter 4 filters unused noise, through 3- DB photo-coupler 5 is divided into two-way: a road is injected fast optical detectors I 7 through fibre delay line 6 and is converted to the signal of telecommunication, input To multidigit analog-digital converter 9 just (+) end;Another road then directly inputs fast optical detectors II 8 and is converted to the signal of telecommunication, adds It is downloaded to the negative (-) end of multidigit analog-digital converter 9;Finally, by whole significance bit parallel output ports of multidigit analog-digital converter 9 (d 0d 1d 2…、d 62d 63) the real-time truly random keying sequence of output multi-channel high speed.Wherein, designed Mode-locked laser device The Gao Zhongying of 1 outputf, time jitter is in the ultrashort light pulse sequence of fs magnitudefNot higher than laser chaos entropy source 2 output is mixed 80% bandwidth of ignorant signal;The time span of designed fibre delay line 6 is repetitionfThe integral multiple in corresponding cycle;Designed Multidigit analog-digital converter 9 is free from the parallel output type multidigit analog-digital converter of sample-hold circuit;Designed multidigit modulus Transducer 9 is parallel output type 8,16,32, one in 64 analog-digital converters;Designed high speed in real time very with The real-time code rate of machine keying sequence is by whole number of significant digit of analog-digital converter 9 and repetitionfProduct determine.
Below in conjunction with accompanying drawing, the detailed description of the invention of the present invention is explained in detail.
As shown in Figure 1, Mode-locked laser device 1 exports repetition ratef(as a example by 10 GHz), wavelength are 1550 The ultrashort light pulse sequence (as shown in Figure 2) of nm, enters in all-optical switch 3 as control signal.Meanwhile, laser mixes The continuous chaos optical signal (as shown in Figure 3) that wavelength is 1560 nm that ignorant entropy source 2 is launched is by the detectable signal of all-optical switch 3 End input.Under the effect of control signal (ultrashort light pulse sequence), in the moment of corresponding ultrashort pulse, all-optical switch 3 opens, phase Chaotic signal between Ying Shi is exportable;Otherwise, when not having moment of ultrashort pulse, all-optical switch 3 is closed, then defeated without chaotic signal Go out.So, all-optical switch 3 just completes the down-sampling to chaos optical signal, output repetition rate and ultrashort pulse sequence frequencyf =10 GHz consistent but peak power chaos rise and fall light pulse sequence (as shown in Figure 4).
The chaos light pulse sequence obtained after sampling is after optical band pass filter 4 filters unused noise, through 3-dB optical coupling Device is divided into two-way: a road is injected fast optical detectors I 7 through fibre delay line 6 and is converted to the signal of telecommunication, is input to multidigit mould Number converter 9 just (+) end;Another road then directly inputs fast optical detectors II 8 and is converted to the signal of telecommunication, is loaded into multidigit The negative (-) end of analog-digital converter 9;Finally, by multidigit analog-digital converter 9 whole parallel output ports (d 0d 1d 2…、d 62d 63) the real-time truly random keying sequence of output multi-channel high speed.It need to be noted that be so that enter multidigit analog-digital converter 9 The signal palpus stringent synchronization at positive and negative two ends, the time span repetition to be of fibre delay line 6f=10The integer in GHz correspondence cycle Times.Here, the time span of this optical delay line is set for 600 ps=6 × 100 ps, and multidigit analog-digital converter 9 is selected 64 analog-digital converters.
The weight of the ultrashort light pulse sequence that the code check of obtained truly random keying sequence is exported by Mode-locked laser device 1 Complex frequencyfDetermine and whole figure places 64 of 64 analog-digital converters 9 determine, equal to 640 Gb/s=64 × 10 Gb/s.Accompanying drawing 5 It it is the two-dimentional point diagram of the real-time truly random keying sequence of this high speed.From accompanying drawing, produced truly random keying sequence 0,1 is distributed Uniformly and without any periodicity.
In order to check the random quality of truly random password produced by the present invention, inventor uses American National Standard and skill The Special Publication 800 22 random cipher testing standard that art institute (NIST) provides to generated with Machine keying sequence is tested.NIST random cipher testing standard is general international standard, comprises 15 tests altogether, each Test result is usedPValue represents.IfPValue is more than significant level valueαWhen=0.01, then show that surveyed random cipher sequence is passed through Corresponding test.Further, the percent of pass calculating each test verifies the effectiveness and just of sequence stochastic behaviour further Really property.When each percent of pass tested is more thanTime, it is believed that surveyed random cipher has good randomness.This In,p = 1- α
Specifically, inventor acquires the real random code sequence that 1000 pool-sizes are 1 Mbit respectively and carries out NIST survey Examination.At this moment, it is desirable to the percent of pass of each test is more than 0. 9806.The test result of inventor shows produced by the present invention each The truly random password of full light planted under speed is respectively provided with high-quality stochastic behaviour, all can successfully pass NIST random cipher test mark Accurate.Subordinate list 1 gives and the present invention is produced truly random password carries out a worst test result of NIST test, but respectively Item testPValue is still all higher than 0.01, and every test percent of pass is all higher than 0.9806, has reached random cipher testing standard, card The real random code randomness that the bright present invention produces is good.
By discussed above it will be seen that a kind of down-sampling multidigit truly random password optics generator of the present invention is whole In signal processing, it is not necessary to electricity clock participates in, thus effectively prevent and shaken, by electronic clock, the electronics ADC rate limit caused Problem.Specifically, the present invention uses all-optical switch to utilize the ultrashort light pulse of ultralow shake to enter chaotic signal in full area of light Row ultralow shake sampling, utilizes, parallel output type multi-bit ADC without sample-hold circuit clock-driven without electricity to mixed Ignorant pulse carries out quantification treatment, produces the real random code sequence of hundred Gb/s magnitudes, the code check of prior art is improve at least two The individual order of magnitude.
In addition, it is necessary to it is emphasized that the code check of truly random password is by Mode-locked laser device produced by the present invention Repetition rate and multi-bit ADC whole number of significant digit determine.The real random code generator of the present invention is owing to have employed self-dalay Quantification technique so that can retain whole significance bit in quantizing process, the truly random password of direct outputting high quality, need not be existing similar Numerous and diverse subsequent processes necessary to technology and the technological deficiency abandoning highest significant position (MSB), effectively prevent follow-up place Synchronization challenges between high-speed electronic component during reason.

Claims (6)

1. a down-sampling multidigit truly random password optics generator, including Mode-locked laser device, laser chaos entropy source, complete Photoswitch, optical band pass filter, 3-dB photo-coupler, fibre delay line, fast optical detectors I, fast optical detectors II And multidigit analog-digital converter;It is characterized in that:
Described Mode-locked laser device (1) output Gao Zhongyingf, time jitter be in the ultrashort light pulse sequence of fs magnitude, load To the control signal input of all-optical switch (3), control the break-make of all-optical switch (3);Laser chaos entropy source (2) exports simultaneously The detectable signal end input of chaos optical signals all-optical switch (3) continuously, under control signal effect, all-optical switch (3) completes Down-sampling to chaos optical signal, output repetition rate and ultrashort pulse sequence frequencyfConsistent but peak power chaos rises and falls Light pulse sequence, after sampling obtain chaos light pulse sequence after optical band pass filter (4) filters unused noise, through 3-dB light Bonder (5) is divided into two-way: fast optical detectors I(7 is injected through fibre delay line (6) in a road) be converted to the signal of telecommunication, input Anode to multidigit analog-digital converter (9);Another road directly inputs fast optical detectors II(8) be converted to the signal of telecommunication, load Negative terminal to multidigit analog-digital converter (9);Then exported by whole significance bit parallel output ports of multidigit analog-digital converter (9) The real-time truly random keying sequence of multipath high-speed.
2. down-sampling multidigit truly random password optics generator as claimed in claim 1, it is characterised in that: described locked mode arteries and veins Rush laser instrument (1) output Gao Zhongyingf, time jitter is in the ultrashort light pulse sequence of fs magnitudefLess than laser chaos entropy source (2) 80% bandwidth of chaotic signal is exported.
3. down-sampling multidigit truly random password optics generator as claimed in claim 1, it is characterised in that: described optical fiber prolongs The time span of line (6) is repetition latefThe integral multiple in corresponding cycle.
4. down-sampling multidigit truly random password optics generator as claimed in claim 1, it is characterised in that: described multidigit mould Number converter (9) is free from the parallel output type multidigit analog-digital converter of sample-hold circuit.
5. the down-sampling multidigit truly random password optics generator as described in claim 1 or 4, it is characterised in that: described many Position analog-digital converter (9) is the one in parallel output type 8,16,32 and 64 analog-digital converters.
6. down-sampling multidigit truly random password optics generator as claimed in claim 1, it is characterised in that: described high speed is real Time truly random keying sequence real-time code rate by whole number of significant digit of multidigit analog-digital converter (9) and repetitionfProduct determine.
CN201610270695.4A 2016-04-27 2016-04-27 A kind of truly random password optics generation device of down-sampling multidigit Expired - Fee Related CN105959094B (en)

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