Random number generating device, true random number generator and system-level chip

Abstract

The invention discloses a random number generating device, a true random number generator and a system-level chip. The random number generating device comprises a clock signal generating module used for generating two low-frequency clock signals with the same frequency and opposite phases, and a clock signal processing module comprising a detection module, a frequency division module and an outputmodule, wherein the detection module is used for detecting whether or not the two generated clock signals are abnormal, the frequency division module is used for dividing the frequency of a clock signal from a clock tree to obtain two clock signals with the same frequency and opposite phases, and the output module is used for outputting the two generated clock signals if it is detected that two generated clock signals are normal, and outputting the two clock signals acquired in the frequency dividing process if it is detected that the two generated signals are abnormal. The random number generating device further comprises a random number generating module used for generating random numbers according to the two clock signals outputted by the output module. According to the embodiment of the invention, the probability that the generated random numbers are predictable is reduced.

Description

technical field [0001] The invention relates to encryption and decryption technology, in particular to a random number generator, a true random number generator and a system-level chip. Background technique [0002] With the development of science and technology, data security is becoming more and more important. You can use a key to encrypt data to ensure data security. Specifically, a random number is generated by a random number generator in a system-on-chip (System On Chip, SOC), and the random number is used as a key to encrypt data. The higher the randomness of the random number generated by the random number generator, the more secure the encrypted data, so the randomness of the random number is the main consideration in the design of the random number generator. [0003] In the related art, there are two types of random number generators, which are pseudo-random number generators and true random number generators. The pseudo-random number generator generates random...

AI Technical Summary

Problems solved by technology

However, if the clock signal generation module is attacked, the two clock signals output by the clock signal generation module will be abnormal, so that the random number generated by the random number generation module is predictable

Images