CN102662626A - Disturbed chaotic double-helix random number generator - Google Patents
Disturbed chaotic double-helix random number generator Download PDFInfo
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- CN102662626A CN102662626A CN2012101342312A CN201210134231A CN102662626A CN 102662626 A CN102662626 A CN 102662626A CN 2012101342312 A CN2012101342312 A CN 2012101342312A CN 201210134231 A CN201210134231 A CN 201210134231A CN 102662626 A CN102662626 A CN 102662626A
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Abstract
The invention relates to a disturbed chaotic double-helix random number generator comprising a linear feedback shift register. The disturbed chaotic double-helix random number generator is characterized by further comprising a control signal generation circuit, a capacitor array, a double-helix oscillator and a sampling quantization circuit. The linear feedback shift register is connected with the control signal generation circuit, and used for outputting a pseudorandom sequence; the control signal generation circuit is connected with the capacitor array, and used for receiving the pseudorandom sequence, generating and outputting a control signal; the capacitor array is connected with the double-helix oscillator, and used for receiving the control signal and outputting an array capacitance value; the double-helix oscillator is connected with the sampling quantization circuit, and used for receiving the array capacitance value and then outputting a chaotic signal; and the sampling quantization circuit receives the chaotic signal, converts the chaotic signal into a digital signal and outputs the digital signal.. Since the initial value of the chaos-based double-helix oscillator is sensitive and unpredictable, the chaotic double-helix oscillator can continuously oscillate and generate output without outside intervention. For the outside disturbance, the representation of the chaotic oscillator is variation of track, and the variation of track is also hard to predict for the complexity.
Description
Technical field
The present invention relates to the IC design field, relate in particular to a kind of chaos double helix randomizer with disturbance.
Background technology
At the information security field of integrated circuit, real random number generator is often as a kind of module of necessity.Chaos circuit is a kind of usual way of realizing real random number generator.
Chaos circuit is divided into discrete chaos and continuous chaos usually.Discrete chaos is generally the iteration of sequence, output be the discrete-time series on the time shaft.Continuously chaos then uses three-dimensional above differential to describe usually, output be continuous waveform.The continuous track that in coordinate system, forms of the variable of chaos shows as the form of one or more spiral usually.
And the predictability of existing randomizer is strong, the security in the message transmitting procedure that is reduces.
Summary of the invention
For addressing the above problem, the present invention provides unpredictability stronger a kind of chaos double helix randomizer with disturbance.
For achieving the above object; The technical scheme that the present invention adopts is: a kind of chaos double helix randomizer with disturbance; Comprise linear feedback shift register, it is characterized in that: also comprise control signal generative circuit, capacitor array, double helix oscillator, sample quantization circuit;
Said linear feedback shift register is connected with the control signal generative circuit, is used to export pseudo-random sequence;
Described control signal generative circuit is connected with capacitor array, is used to receive pseudo-random sequence and produces and export control signal;
Described capacitor array is connected with the double helix oscillator, is used to receive control signal and output array capacitance;
Described spiral oscillator is connected with the sample quantization circuit, is used for behind the receiving array capacitance and exports chaotic signal, and said sample quantization circuit receives chaotic signal and converts digital signal output into.
First preferred version of the present invention is that described double helix oscillator adopts chaos double helix circuit.
Second preferred version of the present invention is that described control signal is many bit parallels signal.
Invention thought of the present invention is: the circuit that adopts among the design is the double helix circuit.Based on the double-helical oscillator of chaos, has unpredictability because its initial value is responsive.Chaos double helix oscillator does not need extraneous the intervention just can constantly vibrate, and produces output.For the disturbance in the external world, the performance of chaotic oscillator is the variation of track, and is also difficult to calculate because of its complicacy.
The double helix oscillator is described by following equation,
Wherein,
When cmos circuit is realized;
is transistorized mutual conductance;
is
; The electric capacity of
end, the electric capacity that
is
to be held.The condition that the circuit of above-mentioned equation representative shows chaos is
.The feasible adjusting to the chaos equation of the wide tuning range of
becomes possibility.Regulation of the double helix circuit can be converted to right
terminal capacitance
adjustment.
Technical advantage of the present invention is: the pseudorandom output with linear feedback shift register is carried out disturbance to chaos double helix Circuits System parameter as implied above, increases the variation of double helix circuit output, thereby has increased unpredictability.
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Description of drawings
Fig. 1 is a present embodiment circuit module synoptic diagram.
Embodiment
With reference to figure 1, the output of linear feedback shift register produces disturbance, regulates the systematic parameter of chaos double helix oscillator, thereby influences the output of random number.Circuit is made up of linear feedback shift register, control signal generative circuit, capacitor array, double helix oscillator and sample quantization circuit etc.
Linear feedback shift register comprises register and XOR gate, under the effect of clock, produces pseudo-random sequence.This sequence is the single-bit serial sequence with clock synchronization.
The pseudo-random sequence that linear feedback shift register produces is exported to the control signal generative circuit.The main effect of control signal generative circuit is: convert the single-bit sequence parallel signal of many bits into, and choose algorithm according to sequence and extract the output signal of parallel signal as module.
Capacitor array receives the output signal of control signal generative circuit.The output of this module is connected to the double helix oscillator.When control signal is different; It is different that output is connected to
end capacitance of double helix oscillator; The i.e. difference of
value, thus realize adjusting to double helix oscilator system parameter.Its main composition is the array that some MOS switches and electric capacity are formed.Each MOS switch of control signal control is in different conductings or off state.For the Different control signal, MOS switch conduction or the combination of turn-offing are different, thereby the electric capacity that effectively connects is different.
The double helix oscillator receives the adjusting of capacitor array, produces chaotic signal, and exports to the sample quantization circuit.
The operation that the sample quantization circuit is sampled chaotic signal and quantize under the effect of clock converts digital signal into, as the design's random number output.
Through the pseudorandom output of linear feedback shift register, the systematic parameter of control chaos double helix oscillator, present embodiment has been realized the disturbance to chaos circuit.The frequency that takes place when disturbance is during much larger than the centre frequency of oscillator, and this structure can not exert an influence to the chaos property of circuit, has but increased unpredictable factor.Simultaneously; Linear feedback shift register and control signal generation module that this circuit is introduced for common chaotic oscillator are than digital module on a small scale, and capacitor array just increases MOS switch formation array for the electric capacity of double helix oscillator
end.Therefore, this circuit realizes that the hardware costs of disturbance is very little, is suitable for implementation in the CMOS integrated circuit.
The present invention is not limited only to the protection domain shown in the foregoing description, and all are based on the invention thought of present embodiment, all in protection scope of the present invention.
Claims (3)
1. the chaos double helix randomizer with disturbance comprises linear feedback shift register, it is characterized in that: also comprise control signal generative circuit, capacitor array, double helix oscillator, sample quantization circuit;
Said linear feedback shift register is connected with the control signal generative circuit, is used to export pseudo-random sequence;
Described control signal generative circuit is connected with capacitor array, is used to receive pseudo-random sequence and produces and export control signal;
Described capacitor array is connected with the double helix oscillator, is used to receive control signal and output array capacitance;
Described spiral oscillator is connected with the sample quantization circuit, is used for behind the receiving array capacitance and exports chaotic signal, and said sample quantization circuit receives chaotic signal and converts digital signal output into.
2. a kind of chaos double helix randomizer with disturbance according to claim 1 is characterized in that: described double helix oscillator adopts chaos double helix circuit.
3. a kind of chaos double helix randomizer with disturbance according to claim 1, it is characterized in that: described control signal is many bit parallels signal.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107239257A (en) * | 2017-06-05 | 2017-10-10 | 上海爱信诺航芯电子科技有限公司 | A kind of real random number generator based on 2 D chaotic double helix |
| CN109475438A (en) * | 2016-07-19 | 2019-03-15 | 花王株式会社 | The manufacturing device of absorber and the manufacturing method of absorber |
| CN109947397A (en) * | 2019-03-20 | 2019-06-28 | 中共中央办公厅电子科技学院(北京电子科技学院) | A kind of no inductance high-speed multichannel can integrate Chaotic Random Number Generator |
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| CN109475438A (en) * | 2016-07-19 | 2019-03-15 | 花王株式会社 | The manufacturing device of absorber and the manufacturing method of absorber |
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