Random password generation method and system based on one-class cryptographic permutation

Abstract

The invention belongs to the technical field of information security, and discloses a random password generation method and system based on one-class cryptographic permutation. The method comprises: for each character bit in the password, generating a 5-bit binary random number, the random number being x, a nonlinear positive permutation on a GF (2) 5 being randomly constructed, and if the positive permutation is P, the positive permutation acting on the random number to obtain P (x) which is also a 5-bit binary number; and according to the character type of each character bit, converting thefive-bit binary number P (x) into a character corresponding to the character type to obtain the generated password. The password generation method supports a user to set the symbol type of each character bit in a user-defined mode, the user experience is enhanced, and meanwhile, the safety of the password generation method based on the pseudo-random numbers is enhanced by using the permutation with the excellent cryptology property such as the normal permutation.

Description

technical field [0001] The invention belongs to the technical field of information security, and in particular relates to a random password generation method and system based on a type of cryptographic permutation. Background technique [0002] Currently, the closest prior art: [0003] In modern society, generating high-security passwords is crucial to protecting everyone's bank accounts as well as various online accounts. Traditional password generation methods mainly include methods based on true random numbers, methods based on pseudo-random numbers, and methods based on password cards. True random numbers are generated using physical phenomena, such as throwing coins, dice, spinning wheels, noise using electronic components, nuclear fission, etc. Such a random number generator is called a true random number generator. Pseudo-random numbers are random number sequences from [0,1] uniform distribution calculated by deterministic algorithms. They are not truly random, but...

AI Technical Summary

Problems solved by technology

True random number generators are generally expensive due to their high technical requirements. Passwords generated based on true random numbers are generally used in fields with high security requirements. To the password application

[0007] (2) The method based on pseudo-random number is not safe

[0008] (3) Lack of user-friendly design, resulting in low usage rate, which in turn leads to password security risks

However, ease of use often means reduced security, and only pseudo-random numbers are used to generate passwords, so it is difficult to design passwords that meet such requirements

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