A random password generation method and system based on a class of cryptographic permutations

Abstract

The invention belongs to the technical field of information security, and discloses a method and system for generating a random password based on a type of cryptographic permutation. For each character bit in the password, a 5-bit binary random number is generated, and the random number is x, and Randomly construct a GF(2) 5 Non-linear conformal permutation on , this conformal permutation is P, then apply the conformal permutation to this random number to obtain P(x), which is also a 5-bit binary number; according to the character type of each character bit, Convert the 5-bit binary number P(x) into characters of the corresponding character type to obtain the generated password. The present invention supports the user-defined password generation method for setting the symbol type of each character bit, which enhances the user experience. At the same time, the present invention also enhances the password generation method based on pseudo-random numbers by using positive-shaped permutations, which have excellent cryptographic properties. The security of the password generation method.

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

Images