CN105930130A - True random number generation apparatus suitable for RFID reader - Google Patents
True random number generation apparatus suitable for RFID reader Download PDFInfo
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- CN105930130A CN105930130A CN201610237747.8A CN201610237747A CN105930130A CN 105930130 A CN105930130 A CN 105930130A CN 201610237747 A CN201610237747 A CN 201610237747A CN 105930130 A CN105930130 A CN 105930130A
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- true random
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
- G06F7/58—Random or pseudo-random number generators
- G06F7/588—Random number generators, i.e. based on natural stochastic processes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
Abstract
The invention discloses a true random number generation apparatus suitable for an RFID reader. The apparatus comprises a band-gap reference circuit, a first resistor, a second resistor, a noise amplifier, a Schmidt trigger, a NOT gate, a D trigger, a charge pump, a transconductance amplifier and a load resistor, wherein one end of the second resistor is connected with the output end of the band-gap reference circuit and one end of the load resistor; the other end of the load resistor is connected with one end of the first resistor and the output end of the transconductance amplifier; the other end of the first resistor and the other end of the second resistor are connected with the positive and negative input ends of the noise amplifier; the output end of the noise amplifier is connected with the input end of the D trigger through the Schmidt trigger and the NOT gate in sequence; and the output end of the NOT gate is further connected with the input end of the transconductance amplifier through the charge pump. According to the apparatus, the periodic jitter of a low-frequency oscillator can be improved, the randomness can be increased, and the purpose of generating a completely unpredictable true random number can be achieved. The apparatus can be widely applied to the field of information security.
Description
Technical field
The present invention relates to information security technology, particularly relate to a kind of true random number generation device being applicable to RFID reader.
Background technology
RF identification (Radio Frequency Identification is called for short RFID) technology is a kind of contactless automatic identification technology, and it brings disaster upon conjunction mode by electromagnetic wave or inductance and transmits signal, to complete the automatic identification to destination object.Compared with other automatic identification technologies such as bar code, magnetic card, Contact Type Ic Card, RFID technique have identification process without manual intervention, can identify that multiple target, information storage are big, be operable with the advantages such as various adverse circumstances simultaneously, therefore, during RFID technique has been widely used in the multiple different field such as fixed capital management, production line automation, animal and vehicle identification, highway toll, gate control system, storage, commodity counterfeit prevention, airline baggage management, container management.And for traditional radio-frequency recognition system, it generally includes label, reader and three parts of Back end data processing system.
Along with the development of electronics Yu the communication technology, information security becomes more and more important, and cryptography is then the best way ensured information safety, and is also unique channel.In cryptographic applications, either the generation of key or the random initializtion of particular variables in cipher protocol in cryptographic algorithm, be required for using random number, it is seen then that random number is very important in cryptological technique.And current, the security of any information safety system all relies on the randomness of these random numbers, if the tandom number generator of system is unsafe, then whole system is also unsafe.The most thus can obtain, in order to meet this most basic requirement of security of radio frequency identification system, it is provided that a kind of scheme for producing complete uncertain true random number, this is problem the most in the urgent need to address.
Summary of the invention
In order to solve above-mentioned technical problem, it is an object of the invention to provide a kind of true random number generation device being applicable to RFID reader.
The technical solution adopted in the present invention is: a kind of true random number generation device being applicable to RFID reader, including band-gap reference circuit, first resistance, second resistance, noise amplifier, Schmidt trigger, not gate, d type flip flop, electric charge pump, trsanscondutance amplifier and load resistance, one end of described second resistance is connected with the output of band-gap reference circuit and one end of load resistance respectively, the other end of described load resistance is connected with one end of the first resistance and the output of trsanscondutance amplifier respectively, the described other end of the first resistance is connected with the positive input terminal of noise amplifier, the described other end of the second resistance is connected with the negative input end of noise amplifier；
The output of described noise amplifier is connected with the input of Schmidt trigger, the output of described Schmidt trigger is connected with the signal input part of d type flip flop and the input of electric charge pump respectively by not gate, and described electric charge delivery side of pump is connected with the input of trsanscondutance amplifier.
Further, it also includes that the first electric capacity, one end of described first electric capacity are connected with electric charge delivery side of pump, the other end ground connection of described first electric capacity.
Further, described Schmidt trigger includes the first FET, the second FET, the 3rd FET, the 4th FET, the 5th FET and the 6th FET；The drain electrode of described first FET is connected with the source electrode of the second FET and the source electrode of the 3rd FET respectively, the drain electrode of described second FET is connected with the drain electrode of the 4th FET and the input of not gate respectively, the source electrode of described 4th FET is connected with the drain electrode of the 5th FET and the source electrode of the 6th FET respectively, and the grid of described 6th FET and the grid of the 3rd FET connect；
The described source electrode of the 5th FET and the drain electrode of the 3rd FET all connect supply voltage, the source electrode of described first FET and the equal ground connection of drain electrode of the 6th FET, the output of described noise amplifier grid with grid, the grid of the second FET, the grid of the 4th FET and the 5th FET of the first FET respectively is connected.
Further, also include that the crystal oscillator of RFID reader, the output of described crystal oscillator are connected with the clock signal input terminal of d type flip flop.
The invention has the beneficial effects as follows: the true random number generation device of the present invention includes band-gap reference circuit, first resistance, second resistance, noise amplifier, Schmidt trigger, not gate, d type flip flop, electric charge pump, trsanscondutance amplifier and load resistance, one end of described second resistance is connected with the output of band-gap reference circuit and one end of load resistance respectively, the other end of described load resistance is connected with one end of the first resistance and the output of trsanscondutance amplifier respectively, the described other end of the first resistance is connected with the positive input terminal of noise amplifier, the described other end of the second resistance is connected with the negative input end of noise amplifier；The output of described noise amplifier is connected with the input of Schmidt trigger, the output of described Schmidt trigger is connected with the signal input part of d type flip flop and the input of electric charge pump respectively by not gate, described electric charge delivery side of pump is connected with the input of trsanscondutance amplifier, thus can obtain, true random number generation device of the present invention can improve the dither cycle of low-frequency oscillator, thus increase the randomness of random number, reach to produce the purpose of complete uncertain true random number.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described further:
Fig. 1 is the structural representation of a kind of true random number generation device being applicable to RFID reader of the present invention；
Fig. 2 is an a kind of specific embodiment electronic circuit schematic of Schmidt trigger be applicable to the true random number generation device of RFID reader of the present invention.
1, noise amplifier.
Detailed description of the invention
For described true random number, it is different from the essential characteristics of pseudo random number is exactly the most periodically.According to general knowledge, true Random Number Generator is typically to utilize the Jitter (oscilator drift) in CMOS oscillator as stochastic source, and Jitter is then a kind of chance phenomenon caused by noise in ring oscillator.On true Random Number Generator based on oscillator designs, a D trigger can be utilized to realize the low-frequency oscillator sampling to high-frequency generator, if the frequency of the low-frequency oscillator of sampling is drift in each cycle (shake), then output bit stream will be random.On the basis of this, by using other noise source, this then can increase more shake.Therefore based on this principle, the present invention devises a kind of true random number generation device being applicable to RFID reader.
As shown in Figure 1, a kind of true random number generation device being applicable to RFID reader, including band-gap reference circuit, the first resistance R1, the second resistance R2, noise amplifier 1, Schmidt trigger, not gate, d type flip flop, electric charge pump, trsanscondutance amplifier OTA and load resistance R3；
One end of described second resistance R2 is connected with the output of band-gap reference circuit and one end of load resistance R3 respectively, one end of the other end of described load resistance R3 the first resistance R1 respectively and the output of trsanscondutance amplifier OTA connect, the described other end of the first resistance R1 is connected with the positive input terminal of noise amplifier 1, and the described other end of the second resistance R2 is connected with the negative input end of noise amplifier 1；
The described output of noise amplifier 1 is connected with the input of Schmidt trigger, the output of described Schmidt trigger is connected with the signal input part of d type flip flop and the input of electric charge pump respectively by not gate, and described electric charge delivery side of pump is connected with the input of trsanscondutance amplifier OTA.Clock signal for described d type flip flop, it should be a high-frequency signal, and preferably, the true random number generation device of the present invention also includes the crystal oscillator of RFID reader, the output of described crystal oscillator is connected with the clock signal input terminal of d type flip flop, and the clock signal (high-frequency signal) of the most described d type flip flop is provided by the crystal oscillator of RFID reader.It addition, for above-mentioned band-gap reference circuit, it is applied not only to provide reference voltage, and also provides bias voltage can to electric charge pump and noise amplifier 1.
Being obtained by above-mentioned, in this device, band-gap reference circuit, resistance noise source (the first resistance R1, the second resistance R2), noise amplifier 1, Schmidt trigger, not gate, electric charge pump and trsanscondutance amplifier OTA together constitute low-frequency oscillator；And in low-frequency oscillator, add resistance noise source and noise amplifier 1, by increasing capacitance it is possible to increase the noise of low-frequency oscillator thus improve dither cycle；The triangle wave voltage signal that described trsanscondutance amplifier is then used for being exported electric charge pump is converted to current signal and by load resistance R3, current signal is converted back voltage signal, now, the triangle wave voltage signal obtained after conversion is the most reduced, the most just can improve the ratio of the noise signal on resistance noise source and triangular signal, thus substantially increase the dither cycle of low-frequency oscillator；Finally, utilize the low frequency signal (signal that i.e. not gate is exported) that low-frequency oscillator is exported, high-frequency signal (described high-frequency signal is by clock signal produced by the crystal oscillator of RFID reader) is sampled, the most just can obtain original random sequence.Thus can obtain, the true random number generation device of the application of the invention, it is possible to increase the dither cycle of low-frequency oscillator, thus increase the randomness of the stream of random bits of final output, reach to produce the purpose of complete uncertain true random number.And, by the circuit design of true random number generation device of the present invention, moreover it is possible to obtain the faster output speed of random number.
Being further used as preferred embodiment, it also includes that the first electric capacity C1, one end C1 of described first electric capacity are connected with electric charge delivery side of pump, the other end ground connection of described first electric capacity C1.
It is further used as preferred embodiment, as in figure 2 it is shown, the Schmidt trigger in the present embodiment includes the first FET M1, the second FET M2, the 3rd FET M3, the 4th FET M4, the 5th FET M5 and the 6th FET M6；
The drain electrode of described first FET M1 is connected with the source electrode of the second FET M2 and the source electrode of the 3rd FET M3 respectively, the drain electrode of described second FET M2 is connected with the drain electrode of the 4th FET M4 and the input of not gate respectively, the source electrode of described 4th FET M4 is connected with the drain electrode of the 5th FET M5 and the source electrode of the 6th FET M6 respectively, and the grid of described 6th FET M6 and the grid of the 3rd FET M3 connect；
The described source electrode of the 5th FET M5 and the drain electrode of the 3rd FET M3 all connect supply voltage, the source electrode of described first FET M1 and the equal ground connection of drain electrode of the 6th FET M6, the output of described noise amplifier 1 grid with grid, the grid of the second FET M2, the grid of the 4th FET M4 and the 5th FET M5 of the first FET M1 respectively is connected.
For above-mentioned Schmidt trigger, being low level or high level according to its output, Schmitt trigger circuit can be divided into two parts, when being output as low level, then M6 turns on, M3 ends, and mainly considers PMOS part when calculating transfer point voltage；When output is high level, then M3 turns on, M6 ends, and mainly considers NMOS tube portion when calculating transfer point voltage.Additionally when output is high level, M4 pipe and M5 pipe turn on, it is provided that the DC channel of VDD is arrived in an output.
It is above the preferably enforcement of the present invention is illustrated, but the invention is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent variations or replacement on the premise of spirit of the present invention, and deformation or the replacement of these equivalents are all contained in the application claim limited range.
Claims (4)
1. the true random number generation device being applicable to RFID reader, it is characterized in that: include band-gap reference circuit, first resistance, second resistance, noise amplifier, Schmidt trigger, not gate, d type flip flop, electric charge pump, trsanscondutance amplifier and load resistance, one end of described second resistance is connected with the output of band-gap reference circuit and one end of load resistance respectively, the other end of described load resistance is connected with one end of the first resistance and the output of trsanscondutance amplifier respectively, the described other end of the first resistance is connected with the positive input terminal of noise amplifier, the described other end of the second resistance is connected with the negative input end of noise amplifier；
The output of described noise amplifier is connected with the input of Schmidt trigger, the output of described Schmidt trigger is connected with the signal input part of d type flip flop and the input of electric charge pump respectively by not gate, and described electric charge delivery side of pump is connected with the input of trsanscondutance amplifier.
A kind of true random number generation device being applicable to RFID reader, it is characterised in that: it also includes that the first electric capacity, one end of described first electric capacity are connected with electric charge delivery side of pump, the other end ground connection of described first electric capacity.
A kind of true random number generation device being applicable to RFID reader the most according to claim 1 or claim 2, it is characterised in that: described Schmidt trigger includes the first FET, the second FET, the 3rd FET, the 4th FET, the 5th FET and the 6th FET；The drain electrode of described first FET is connected with the source electrode of the second FET and the source electrode of the 3rd FET respectively, the drain electrode of described second FET is connected with the drain electrode of the 4th FET and the input of not gate respectively, the source electrode of described 4th FET is connected with the drain electrode of the 5th FET and the source electrode of the 6th FET respectively, and the grid of described 6th FET and the grid of the 3rd FET connect；
The described source electrode of the 5th FET and the drain electrode of the 3rd FET all connect supply voltage, the source electrode of described first FET and the equal ground connection of drain electrode of the 6th FET, the output of described noise amplifier grid with grid, the grid of the second FET, the grid of the 4th FET and the 5th FET of the first FET respectively is connected.
A kind of true random number generation device being applicable to RFID reader the most according to claim 1 or claim 2, it is characterised in that: also include that the crystal oscillator of RFID reader, the output of described crystal oscillator are connected with the clock signal input terminal of d type flip flop.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610237747.8A CN105930130B (en) | 2016-04-14 | 2016-04-14 | A kind of true random number generation device suitable for RFID reader |
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| CN201610237747.8A CN105930130B (en) | 2016-04-14 | 2016-04-14 | A kind of true random number generation device suitable for RFID reader |
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| CN105930130B CN105930130B (en) | 2018-08-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108733350A (en) * | 2017-04-13 | 2018-11-02 | 力旺电子股份有限公司 | Generating random number device and its control method |
| CN110554855A (en) * | 2019-09-11 | 2019-12-10 | 北京智芯微电子科技有限公司 | True random number generator |
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| CN102662625A (en) * | 2012-04-06 | 2012-09-12 | 国网电力科学研究院 | True random number generator and realization method thereof |
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| CN205721741U (en) * | 2016-04-14 | 2016-11-23 | 佛山酷微微电子有限公司 | A kind of true random number generation device being applicable to RFID reader |
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2016
- 2016-04-14 CN CN201610237747.8A patent/CN105930130B/en not_active Expired - Fee Related
Patent Citations (5)
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| CN1752924A (en) * | 2005-08-18 | 2006-03-29 | 上海微科集成电路有限公司 | Real random number generator based on oscillator |
| CN201773390U (en) * | 2010-09-01 | 2011-03-23 | 中国电力科学研究院 | Truly random number generator based on resistance noise processing |
| CN102662625A (en) * | 2012-04-06 | 2012-09-12 | 国网电力科学研究院 | True random number generator and realization method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108733350A (en) * | 2017-04-13 | 2018-11-02 | 力旺电子股份有限公司 | Generating random number device and its control method |
| CN108733350B (en) * | 2017-04-13 | 2021-08-27 | 力旺电子股份有限公司 | Random number generation device and control method thereof |
| CN110554855A (en) * | 2019-09-11 | 2019-12-10 | 北京智芯微电子科技有限公司 | True random number generator |
| CN110554855B (en) * | 2019-09-11 | 2021-10-12 | 北京智芯微电子科技有限公司 | True random number generator |
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