CN102637122B - The parity of physically based deformation noise generates method and the system thereof of true random number - Google Patents
The parity of physically based deformation noise generates method and the system thereof of true random number Download PDFInfo
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Abstract
The parity that the present invention relates to a kind of physically based deformation noise generates method and the system thereof of true random number.Described method generates the method for true random number according to the parity of noise after analog to digital conversion, and it comprises the following steps: 1) produce analogue noise signal by physical noise source; 2) the analogue noise signal that the physical noise source of acquisition produces is carried out analog/digital conversion, convert digital noise signal to; 3) scale-of-two random number is generated according to the parity of the digital noise signal after conversion; 4) repetitive cycling step 2) and step 3), obtain the sequence comprising some random numbers.Method of the present invention can utilize various noise source, and produce the quality of random number not by the impact of environment, good stability, antijamming capability is strong, and immediately can produce random number, generates random number efficiency high.System of the present invention, device is simply convenient to integrated, cheap for manufacturing cost.
Description
Technical field
The present invention relates to the technical field of randomizer, particularly a kind of parity of physically based deformation noise generates the method for true random number and system thereof, can high-level efficiency, high stability, immediately produce true random number sequence.
Background technology
High-quality random number has very important application in fields such as secret communication, information security, authentication, cipher protocol, digital signature.In addition, coml lottery ticket and fruit machine also need high-quality random number to realize its unpredictability.How to produce the important research direction that high-quality random number is cryptography and even information security at high speed at present.
Desirable randomizer generation is evenly distributed, data sequence independent of each other.According to produced mode, random number sequence can be divided into pseudo random number and true random number two class, pseudo random number is by an original state (being called " seed "), utilization has enough macrocyclic pseudorandom number generator (function) and produces pseudo random number on computers, once given algorithm and seed, it is exactly what determine that sequence exports.At present, computing machine and internet security systems all adopt pseudorandom number generator, and the random series that this dependence algorithm produces there will be polyisomenism after certain length, and for the cryptographic system needing high safety, this is danger close.And the generation of true random number is the random character relying on nature physical phenomenon, these physical accidental sources are uncertain, thermonoise of such as lava lamp, radioactivity decay, atmospheric noise, circuit etc., thus, true random number can eliminate the periodic problem of pseudo random number up hill and dale, the random number sequence produced possesses the feature of uncertainty, unpredictable property and nonrepeatability, obviously for infosystem, the pseudo random number mathematically produced is high not as the security of the true random number produced with physical method.
At present, market there are some true random numbers based on random physical phenomenon produce equipment, its method mainly producing true random number differentiates amplitude method, be exactly that regulation one differentiates amplitude, then sampled in physical noise source, the signal obtained if sampled is higher than the discriminating amplitude of regulation, then export 1, otherwise export 0, thus generate scale-of-two random number sequence, but, the method stability is very poor, poor anti jamming capability, is easily subject to the impact of the environmental factor such as temperature, pressure, reduces the random performance generating random number sequence.In addition, a kind of method producing true random number is also had to be interval method, this method generates random number sequence according to the figure place of sequence fragment, although the method increases in stability, but efficiency comparison is low, the sequence grown is needed very much to produce several random numbers, and, the method can not export random number sequence immediately, because generating principle determines that it has one period of time delay in output random number sequence.
Therefore, the generation method taking into account the true random number of high-level efficiency and stability is a difficult point, a kind of method is not still had can both to ensure immediately to generate random number sequence expeditiously in the generation method of current true random number, ensure again the stability generating random number sequence, make it have good antijamming capability.
Summary of the invention
The object of the invention is to, a kind of parity of physically based deformation noise is provided to generate method and the system thereof of true random number, the problem of high-level efficiency and stability can be taken into account, while ensureing immediately to generate true random number sequence expeditiously, in turn ensure that the stability generating true random number sequence, there is good antijamming capability.
For achieving the above object, the parity that the invention provides a kind of physically based deformation noise generates the method for true random number, and the method generates the method for true random number according to the parity of noise after analog to digital conversion, and it comprises the following steps:
1) analogue noise signal is produced by physical noise source;
2) the analogue noise signal that the physical noise source of acquisition produces is carried out analog/digital conversion, convert digital noise signal to;
3) scale-of-two random number is generated according to the parity of the digital noise signal after conversion;
4) repetitive cycling step 2) and step 3), till obtaining abundant random number, finally obtain the sequence comprising some random numbers.
One as technique scheme is improved, described step 3) be according to conversion after the parity of digital noise signal generate scale-of-two random number 0 or 1, if digital noise signal is even number, then export scale-of-two random number 0/1; Accordingly, if digital noise signal is odd number, then export scale-of-two random number 1/0.
In said method, preferred described step 3) in export scale-of-two random number rule be: if regular i) digital noise signal is even number, then export scale-of-two random number 0; If digital noise signal is odd number, then export scale-of-two random number 1.
Or, preferred described step 3) in export scale-of-two random number rule be: regular ii) if digital noise signal is even number, then export scale-of-two random number 1; If digital noise signal is odd number, then export scale-of-two random number 0.
One as technique scheme is improved, described step 4) cyclic process in step 3) rule that generates scale-of-two random number according to the parity of the digital noise signal after conversion can be change.Namely in described step 4) cyclic process in also preferably include following steps: the exchange step 3 according to cycle index) in export regular i) the Sum fanction ii of scale-of-two random number 0 and 1).
One as technique scheme is promoted, and described physical noise source is without any restrictions, can be the various physical noise such as noise of uniform white noise, white Gaussian noise or Poisson distribution.
Another object of the present invention is to, the parity additionally providing a kind of physically based deformation noise generates the system of true random number, can high-level efficiency, high stability, immediately generate the scale-of-two random number sequence possessing outstanding random performance.This system produces scale-of-two true random number according to the parity of noise, and described system comprises: clock module, noise source model, analog-to-digital conversion module, true random number generation module, wherein,
Described clock module, for generation of TTL clock signal, ensures the synchronous of the collection of signal in the generation of noise signal in noise source model and analog-to-digital conversion module;
Described noise source model, for generation of physical noise;
Described analog-to-digital conversion module, the simulating signal for the circuit noise voltage generated by noise source model is carried out gathering and is converted thereof into digital signal output;
Described true random number generation module, the parity for the digital signal according to conversion generates scale-of-two random number and exports.
One as technique scheme is improved, described random number generation module, and the parity according to the digital noise signal after conversion generates scale-of-two random number 0 or 1, if digital noise signal is even number, then exports scale-of-two random number 0/1; Accordingly, if digital noise signal is odd number, then export scale-of-two random number 1/0.
Preferred described random number generation module exports scale-of-two true random number according to following rule:
If rule i) digital noise signal is even number, then export scale-of-two random number 0; If digital noise signal is odd number, then export scale-of-two random number 1.
Or preferred described random number generation module exports scale-of-two random number according to following rule:
Rule ii) if digital noise signal is even number, then export scale-of-two random number 1; If digital noise signal is odd number, then export scale-of-two random number 0.
One as technique scheme is improved, and the rule that described random number generation module generates scale-of-two random number according to the parity of the digital noise signal after conversion can be change.
Further, after described true random number source exports m position scale-of-two random number (m be greater than 1 integer), exchange described regular i) Sum fanction ii).
As a popularization of technique scheme, described noise source model can be any one physical noise source.Can be: the various physical noise such as noise of uniform white noise, white Gaussian noise or Poisson distribution.
In technique scheme, described noise source model is by weakening the supply voltage of TOSA, decaying, it sends the luminous power of light, and makes the luminous power after decaying be less than or equal to the detection sensitivity of ROSA, and the signal that ROSA is exported is the irregular noise signal of milli.
The method of the generation true random number introduced in the present invention can utilize various noise source, noise of such as uniform white noise, white Gaussian noise, Poisson distribution etc., produce the quality of random number not by the impact of environment, good stability, antijamming capability is strong, immediately can produce true random number, generate random number efficiency high.
The invention has the advantages that, the parity of a kind of physically based deformation noise of the present invention generates method and the system thereof of true random number, the method of described generation true random number can utilize various noise source, produce the quality of random number not by the impact of environment, good stability, antijamming capability is strong, immediately can produce true random number, generates random number efficiency high.True random number provided by the invention produces system, and device is simply convenient to integrated, cheap for manufacturing cost.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the preferred embodiment of the method for the parity generation true random number that the present invention is based on physical noise;
Fig. 2 is the function block diagram of the system of the parity generation true random number that the present invention is based on physical noise;
Fig. 3 is the structural representation of the system of the parity generation true random number that the present invention is based on physical noise;
Fig. 4 be one embodiment of the invention under the supply voltage that light emission secondary module is different, the signal that light-receiving secondary module exports, what wherein Ch1 passage was corresponding is TOSA supply voltage be 5V, Ch2 passage corresponding be TOSA supply voltage be 2.9V;
Fig. 5 is the process flow diagram (exchange parameter is for m=5) of the preferred embodiment of dynamic exchange according to the present invention predefined generation true random number method.
Embodiment
Describe optimal form of the present invention in detail below in conjunction with accompanying drawing and various embodiment to be described in detail.
First embodiment
A kind of process flow diagram generating the preferred embodiment of true random number method in the present invention as shown in Figure 1, the method comprises the following steps:
1) physical noise source produces noise signal;
2) to step 1) noise signal that produces carries out analog/digital conversion, generates the noise signal of numeral;
3) to step 2) parity of digital signal that generates judges.If be odd number, then export scale-of-two random number 1, if be even number, then export scale-of-two random number 0;
4) return, from step 1) perform.
In above-described embodiment, step 1)-2) be to obtain noise signal that physical noise source produces and converting thereof into digital noise signal.Step 3) be then export scale-of-two random number 0 or 1 according to the parity of digital noise signal, wherein, and step 3) be export rule according to predefined scale-of-two random number to export random number.
Fig. 2 gives the function block diagram of a kind of true random number generation system generating the method for true random number according to the present invention, comprises clock module, noise source model, analog-to-digital conversion module and true random number generation module.
Wherein, described analog-to-digital conversion module is connected to described noise source model, and the simulating signal of the circuit noise voltage generated by noise source model converts digital signal to and exports; Described clock module connects noise source model and analog-to-digital conversion module, is used for the collection of signal in the generation of synchronization noise signal and analog-to-digital conversion module; Described true random number generation module is connected to described analog-to-digital conversion module, to generate and export scale-of-two random number 0 or 1 for the digital noise signal that generated by analog-to-digital conversion module according to parity.
Fig. 3 gives the structural representation of a kind of scale-of-two true random number generation system generating the method for true random number according to the present invention, it comprises: light emission secondary module (Transmitter Optical Sub-Assembly, be called for short TOSA), light-receiving secondary module (Receiver Optical Sub-Assembly, be called for short ROSA), clock source, analog/digital converter and single-chip microcomputer.Wherein, the clock signal that clock source sends is used for synchronous TOSA and analog/digital converter; TOSA according to received clock signal utilizing emitted light signal, namely in the high level position of clock signal, TOSA utilizing emitted light signal, in the low level position of clock signal, TOSA is not luminous; By weakening the supply voltage of TOSA, can decaying, it sends the luminous power of light, makes the luminous power after decaying be less than or equal to the detection sensitivity of ROSA, and like this, the signal that ROSA is exported is irregular noise signal in the least.Analog/digital converter is sampled and is converted thereof into digital noise signal the irregular noise signal of milli according to clock signal and exports to single-chip microcomputer in same clock window.Single-chip microcomputer exports rule according to predefined scale-of-two random number and exports random number.
Wherein, TOSA and ROSA is the integrated module of optical transceiver integrated, and the irregular noise signal that the ROSA obtained exports as shown in Figure 4.The result that the light that what Ch1 passage was corresponding is TOSA supply voltage sends when being 5V is exported by ROSA detection.The result that the light that what Ch2 passage was corresponding is TOSA supply voltage sends when being 2.9V is exported by ROSA detection.As seen from Figure 4, along with the reduction of supply voltage, Output optical power also decreases, and when supply voltage is 5V, the luminous power of output is greater than the detection sensitivity of ROSA, then ROSA exports a TTL signal.When supply voltage is 2.9V, the luminous power of output is less than the detection sensitivity of ROSA, then what ROSA exported is irregular noise signal.Thus obtain the true random noise source of physically based deformation characteristic generation.
In the true random number generation system of the present embodiment, in described single-chip microcomputer, predefined scale-of-two random number exports regular can setting according to the needs of self by user, such as be set as regular i): if digital noise signal is even number, then export scale-of-two random number 0; If digital noise signal is odd number, then export scale-of-two random number 1.Or be set as regular ii): if digital noise signal is even number, then export scale-of-two random number 1; If digital noise signal is odd number, then export scale-of-two random number 0.Also dynamic exchange predefine rule (will describe in detail in the second embodiment) can be set as
Table 1 gives the assay that above-mentioned true random number produces the true random number sequence that system generates.
The assay of table 1 true random number sequence
Wherein the data volume of test result is 1638320 bits, every testing result from table 1 can be seen, adopt the method for the present embodiment, true random number sequence can be obtained, and the quality of random numbers that this disposal route obtains is significantly higher than the random performance of the random number that commercial true random number chip in the market generates.
Second embodiment
In order to improve quality of random numbers, make the ratio of in the final scale-of-two random number sequence exported 1 and 0 more impartial, the present invention can also export regular i) Sum fanction ii by carrying out dynamic exchange predefine scale-of-two random number to above-mentioned single-chip microcomputer) setting, if namely meta-rule is:
Rule is i): if digital noise signal is even number, then export scale-of-two random number 0;
If digital noise signal is odd number, then export scale-of-two random number 1;
Rule after exchange becomes:
Rule ii): if digital noise signal is even number, then export scale-of-two random number 1;
If the figure place of described fragment is odd number, then export scale-of-two random number 0.
Vice versa.
Above-mentioned dynamic exchange rule both can exchange according to the number of times of circulation, and such as often export m position random number (m is greater than 1) and just exchange once rule, also can exchange according to other parameter, can be even random exchange.
Fig. 5 gives the preferred embodiment process flow diagram (exchange parameter is for m=5) of the dynamic exchange predefined generation true random number method in the present invention.Comprise the following steps:
1) initializing variable N=0;
2) physical noise source produces noise signal;
3) to step 2) noise signal that produces carries out analog to digital conversion, generates the noise signal of numeral;
4) whether judgment variable N equals 5.If be not equal to 5, perform step 5), if equal 5, perform step 6);
5) to step 3) parity of digital signal that generates judges.If be odd number, then export scale-of-two random number 1, if be even number, then export scale-of-two random number 0.Perform step 7);
6) to step 3) parity of digital signal that generates judges.If be odd number, then export scale-of-two random number 0, if be even number, then export scale-of-two random number 1.Perform step 8);
7) make N=N+1, then return, from step 2) perform.
8) return, from step 1) perform.
A same embodiment is compared, and realize by adding variable N the exchange that scale-of-two random number exports rule in the present embodiment, often export m position (m=5) scale-of-two random number, rule just exchanges once.Certainly, by reading the above embodiment of the present invention, a lot of method can also there be is realize the dynamic exchange exporting rule.
Application above-described embodiment carries out actual test to same group of true random number sequence, and test result is as shown in table 2.Wherein, data volume is 1638320 bits.Testing result 1 does not exchange the regular random number test result obtained of predefine; Testing result 2 exchanges the regular random number test result obtained of predefine.Therefrom can find out, by exchanging predefined rule, the quality of random number is improved.
Table 2 exchanges the comparison that predefine scale-of-two random number exports rule front and back
Finally it should be noted that above each embodiment and accompanying drawing thereof method and true random number only in order to generation true random number of the present invention to be described produce system, and unrestricted.Although with reference to embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, various combination, amendment or equivalent replacement are carried out to technical scheme of the present invention, do not depart from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (6)
1. the parity of physically based deformation noise generates a method for true random number, and the method generates the method for true random number according to the parity of noise after analog to digital conversion, and it comprises the following steps:
1) analogue noise signal is produced by physical noise source; Wherein, by weakening the supply voltage of TOSA, decaying, it sends the luminous power of light, makes the luminous power after decaying be less than or equal to the detection sensitivity of ROSA, ensures that signal that ROSA exports be irregular noise signal in the least;
2) the analogue noise signal that the physical noise source of acquisition produces is carried out analog/digital conversion, convert digital noise signal to;
3) scale-of-two random number 0 or 1 is generated according to the parity of the digital noise signal after conversion, the regular i generating scale-of-two random number is: if digital noise signal is even number, then export scale-of-two random number 0, accordingly, if digital noise signal is odd number, then export scale-of-two random number 1; Or the regular ii generating scale-of-two random number is: if digital noise signal is even number, then export scale-of-two random number 1; Accordingly, if digital noise signal is odd number, then export scale-of-two random number 0;
4) repetitive cycling step 2) and step 3), obtain the sequence comprising some random numbers.
2. the method for generation true random number according to claim 1, is characterized in that, described step 4) cyclic process in step 3) method that generates scale-of-two random number according to the parity of the digital noise signal after conversion is change; After described true random number source exports m position scale-of-two random number, m be greater than 1 integer, exchange described regular i Sum fanction ii.
3. the parity of physically based deformation noise according to claim 1 generates the method for true random number, it is characterized in that, described physical noise source is the noise of uniform white noise, white Gaussian noise or Poisson distribution.
4. the parity of a physically based deformation noise generates the system of true random number, this system produces scale-of-two true random number according to the parity of noise after analog to digital conversion, described system comprises: clock module, noise source model, analog-to-digital conversion module and true random number generation module, wherein
Described clock module, for generation of TTL clock signal, ensures the synchronous of the collection of signal in the generation of noise signal in noise source model and analog-to-digital conversion module;
Described noise source model, for generation of physical noise; This noise source model is by weakening the supply voltage of TOSA, and decaying, it sends the luminous power of light, and makes the luminous power after decaying be less than or equal to the detection sensitivity of ROSA, ensures that signal that ROSA exports be irregular noise signal in the least;
Described analog-to-digital conversion module, the simulating signal for the circuit noise voltage generated by noise source model is carried out gathering and is converted thereof into digital signal output;
Described true random number generation module, parity for the digital signal according to conversion generates and exports scale-of-two random number 0 or 1, the regular i generating scale-of-two random number is: if digital noise signal is even number, then export scale-of-two random number 0, accordingly, if digital noise signal is odd number, then export scale-of-two random number 1; Or the regular ii generating scale-of-two random number is: if digital noise signal is even number, then export scale-of-two random number 1; Accordingly, if digital noise signal is odd number, then export scale-of-two random number 0.
5. the parity of physically based deformation noise according to claim 4 generates the system of true random number, it is characterized in that, the method that described true random number generation module generates scale-of-two random number according to the parity of the digital noise signal after conversion is change; After described true random number source exports m position scale-of-two random number, m be greater than 1 integer, exchange described regular i Sum fanction ii.
6. the parity of physically based deformation noise according to claim 4 generates the system of true random number, and it is characterized in that, described true random number generation module is the real random number generator utilizing physical noise.
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| CN103049243B (en) * | 2012-12-17 | 2015-11-25 | 深圳国微技术有限公司 | True random-number generating method and device thereof |
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| CN103617020B (en) * | 2013-12-23 | 2018-03-23 | 网易乐得科技有限公司 | A kind of method and apparatus that random number is generated in application program |
| CN103824005A (en) * | 2014-03-11 | 2014-05-28 | 东南大学 | Anti-copying system embedded with configurable IP core and anti-copying method |
| CN104133658A (en) * | 2014-07-29 | 2014-11-05 | 江苏宏云技术有限公司 | On-chip true random number generator |
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| CN110333842B (en) * | 2019-06-28 | 2021-08-17 | 深圳市永达电子信息股份有限公司 | True random number generation method and system |
| CN111541537B (en) * | 2020-04-22 | 2022-11-08 | 北京字节跳动网络技术有限公司 | Random number defect detection method and device |
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