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A One-way Encryption Method Based on Chaotic System

An encryption method and chaotic system technology, which are applied in secure communication through chaotic signals, transmission systems, encryption devices with shift registers/memory, etc. Solve problems such as the difficulty of cracking to achieve the effect of increasing the difficulty of cracking

Active Publication Date: 2019-08-09
CHENGDU UNIV OF INFORMATION TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of one-way encryption method based on chaotic system, solve the time that existing encryption method appears is long, the security of existing encryption algorithm is low, and because the characteristic of existing algorithm, make this algorithm only It can be applied to a certain field, but it cannot satisfy users to determine the length of ciphertext according to their actual needs; it cannot increase the difficulty for attackers to crack, and it cannot give users an additional choice of encryption method

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  • A One-way Encryption Method Based on Chaotic System

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0029] The application principle of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] Such as figure 1 As shown, the specific steps of the one-way encryption method based on the chaotic system provided by the embodiment of the present invention are as follows:

[0031] Step 1: Randomly input a string str of any length.

[0032] Step 2: convert the string into binary code according to a certain encoding method, and calculate the binary length len_str.

[0033]Step 3: judge whether the length len_str is a multiple of 3, that is, len_str%3=0. If it is not a mult...

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Abstract

The invention discloses a one-way encryption method based on a chaotic system. The length value of a binary code converted from a character string of any length randomly input by a user uses the Logistic chaotic equation X n+1 =uX n (1‑X n ), to generate the Logistic chaos equation of X 0 , u, and the initial value C are fixed values; then put X 0 , u, and the initial value C fixed values ​​are applied to the Logistic chaos equation; finally, the values ​​C, M, and y generated by the chaotic calculation are processed to generate a fixed-length string. The one-way encryption method of the present invention is similar to a hash function, which can process an input of any length, and finally output a value with a fixed length. Due to the characteristics of a chaotic system, the algorithm has the ability to encrypt plaintext into ciphertext. But the ciphertext cannot decrypt the one-wayness of the plaintext.

Description

technical field [0001] The invention belongs to the technical field of hash algorithm application, in particular to a one-way encryption method based on a chaotic system. Background technique [0002] In the existing encryption technology, the hash function is particularly important in the field of digital signature and authentication, so many people have entered into in-depth research on related algorithms. In 2004, at the International Cryptography Conference held in Santa Barbara, California, from After Professor Yun in China deciphered the MD5, HAVAL-128, and RIPEMD algorithms, many cryptography experts have made more research results in the MD5 field. Therefore, the security of the MD5 algorithm has been increasingly challenged. Chaos originates from the nonlinear dynamical system, and the nonlinear dynamical system describes any process that changes with time. This process is uncertain, similar to random, aperiodic, and very sensitive to the initial value. These charac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/06H04L9/00
CPCH04L9/001H04L9/0643
Inventor 李飞刘勇覃周高路路徐翔
Owner CHENGDU UNIV OF INFORMATION TECH
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