Feedback frequency modulation true random number generator and feedback frequency modulation true random number generation method

Abstract

The invention discloses a feedback frequency modulation true random number generator and a feedback frequency modulation true random number generation method. The feedback frequency modulation true random number generator comprises a trigger, an adjustable frequency high-frequency oscillator and a low-frequency oscillator, wherein the high-frequency clock output end of the adjustable frequency high-frequency oscillator is connected with the data input end of the trigger, and the low-frequency clock output end of the low-frequency oscillator is connected with the clock input end of the trigger.The feedback frequency modulation true random number generator also comprises a statistical feature analysis circuit and a frequency adjustment circuit, wherein the random number input end of the statistical feature analysis circuit and the data output end of the trigger are connected; and the statistical analysis result output end of the statistical analysis circuit is connected with the statistical analysis result input end of the frequency adjustment circuit. By use of the feedback frequency modulation true random number generator, a feedback mechanism is established, and the frequency ofthe high-frequency oscillator is dynamically adjusted according to the statistical feature of the random number so as to guarantee that noise in the low-frequency oscillator can be successfully extracted and the random number is generated.

Description

technical field [0001] The invention relates to a feedback frequency modulation true random number generator and a true random number generation method, belonging to the technical field of electronic circuits. Background technique [0002] like figure 1 As shown, it is a schematic diagram of a true random number generator commonly used at present, including a high-frequency clock oscillator, a low-frequency clock oscillator and a flip-flop, and the low-frequency clock oscillator is the main source of noise. The white noise and flicker noise widely present in electronic devices make the output of the oscillator not an ideal periodic signal, but a certain phase jitter. Use a low-frequency oscillator with jitter to sample a high-frequency oscillator through a trigger. A random number output can be generated. figure 2 It is a schematic diagram of the jitter of a simple ring oscillator. In practical applications, since the jitter of the ring oscillator is very small, an additi...

AI Technical Summary

Problems solved by technology

Since the noise source is the random thermal noise of electronic devices, the random numbers generated by this structure are unpredictable. However, since the jitter of the low-frequency oscillator is expressed in the way of sampling high-frequency clocks, the randomness of its sampling output is different from that of high-frequency oscillators. The operating frequency of the high-frequency clock has a great relationship. When the frequency of the high-frequency clock is too low or too high, the jitter of the low-frequency clock cannot be extracted, so that the system does not meet the randomness requirements.

Images