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Password guessing method

A password and observation probability technology, applied in the direction of digital data authentication, etc., can solve the problem of complex password guessing and so on

Active Publication Date: 2019-05-31
CHINA ACADEMY OF ELECTRONICS & INFORMATION TECH OF CETC
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  • Abstract
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Problems solved by technology

[0005] The embodiment of the present invention provides a password guessing method device to solve the problem of complicated password guessing in the prior art

Method used

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Embodiment Construction

[0046] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0047] The first embodiment of the present invention provides a password guessing method, such as figure 1shown, including the following specific steps:

[0048] Step S101, preprocessing the data set, extracting passwords from the data set to obtain a password set, and dividing the password set according to a predetermined ratio to obtain a training set and a test set. In this step, the division ratio of the password set is 3:1, s...

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Abstract

The invention discloses a password guessing method and password guessing equipment. The method comprises the steps of preprocessing a data set, extracting password passwords in the data set to obtaina password set, dividing the password set i according to a preset proportion, and acquiring a training set and a test set; Constructing a hidden Markov model by using the training set to obtain a transition probability, an observation probability and an initial state probability; And calculating the use frequency of the password of each length in the training set to obtain user password length probability distribution, and generating a guessing password by using the transition probability, the observation probability, the initial state probability and the password length probability distribution. According to the invention, the password guessing is carried out by using the hidden Markov model; Based on the initial state probability, the conversion probability and the observation probability among the password characters, modes such as password character combination and sequence of a data set are mined and discovered, so that passwords are guessed better, the guessing of the passwordsdoes not need personal information of users, and the guessing method is simple and free of limitation.

Description

technical field [0001] The invention relates to the technical field of password analysis, in particular to a password guessing method and equipment. Background technique [0002] With the advent of the information age, more and more attention has been paid to information security issues, and user authentication mechanism has become a common method to protect user privacy. Among them, the text password has the characteristics of simple and convenient implementation, and is the most commonly used user authentication method, but there is a problem that the password strength is not high enough. Therefore, the research on the security of passwords has become a hot issue, among which using different methods to realize the guessing of password sets is a key research direction and has important research significance. On the one hand, guessing user passwords from the perspective of a cracker can make people have a deeper understanding of the security of passwords; on the other hand,...

Claims

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Application Information

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IPC IPC(8): G06F21/46
Inventor 王蕊徐岳皓于展廖勇石珺吕博杨阳朝叶雪洁周阳
Owner CHINA ACADEMY OF ELECTRONICS & INFORMATION TECH OF CETC
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