Method and device for generating pseudo-random number seeds and pseudo-random numbers

Abstract

The invention discloses a method and a device for generating pseudo-random number seeds and pseudo-random numbers. The method comprises reading a group of original pseudo-random number seeds from current original pseudo-random number seeds generated by an original pseudo-random number seed generation module; reading the pseudo-random number seeds generated the last time from a storage module; comparing the pseudo-random number seeds with the group of original pseudo-random number seeds, and reading a group of original pseudo-random number seeds from the original pseudo-random number seed generation module again for making comparison if the pseudo-random number seeds are identical; otherwise, performing calculation based on the current read original pseudo-random number seeds to obtain pseudo-random number seeds and storing the obtained pseudo-random number seeds in the storage module. Accordingly, the current generated pseudo-random number seeds can be guaranteed to be different from the pseudo-random number seeds generated the last time, the randomness of generated pseudo-random number seeds is improved, the randomness of pseudo-random numbers generated according to the pseudo-random number seeds is improved, and the security of information security protection is further enhanced.

Description

technical field [0001] The invention relates to the field of information security, in particular to a method and a device for generating a pseudo-random number seed, and a method and a device for generating a pseudo-random number. Background technique [0002] In the current communication technology, in order to ensure the security of communication information, it is necessary to encrypt the communication data, and the encryption process needs to use random numbers; in the process of non-contact chip communication, in order to improve the success rate of anti-collision, random numbers are also needed number. The randomness of the pseudo-random numbers produced by various methods is not ideal now, for example: the Chinese patent application document "A Pseudo-random Number Generating Circuit for a Radio Frequency Identification Tag Chip" whose publication number is CN101673351A and whose publication date is 2010-03-17 And Its Generation Method" proposes a circuit and method ...

AI Technical Summary

Problems solved by technology

The randomness of the pseudo-random numbers produced by various methods is not ideal now, for example: the Chinese patent application document "A Pseudo-random Number Generating Circuit for a Radio Frequency Identification Tag Chip" whose publication number is CN101673351A and whose publication date is 2010-03-17 and Its Generation Method” proposes a circuit and method for generating a pseudo-random number using the initial state of a counter that has not been reset after power-on as a pseudo-random number seed in an RFID tag chip

Specifically, the oscillation frequency of the on-chip oscillator is unstable at the beginning of power-on, and the generation time and holding time of the reset signal are not fixed during different power-on processes to generate the seeds of the pseudo-random number generator. However, due to the unstable state caused by power-on It may not be different every time, so there will be a situation where the initial result of the current power-on is consistent with the initial result of the last power-on, resulting in the current generated pseudo-random number seed being the same as the last generated pseudo-random number seed, which in turn leads to The generated pseudo-random numbers are also the same, which reduces the randomness of pseudo-random numbers, thereby reducing the security of information protection

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