Three-dimensional Arnold mapping-based image grouping encryption method

Abstract

The invention relates to a three-dimensional Arnold mapping-based image grouping encryption method, which is characterized by comprising the following steps: firstly, adopting an Amold mapping extended to three dimensions to construct an S box; then, performing sorting scrambling on a chaotic sequence generated by a Chebyshev mapping; and finishing the encryption operation through multi-iteration. The theoretical analysis and experimental result prove that the three-dimensional Arnold mapping-based image grouping encryption method has the advantages of large key space, high sensitivity, high speed, excellent safety, strong attack resistance, and the like. Compared with other similar methods, the three-dimensional Arnold mapping-based image grouping encryption method guarantees the safety and has higher speed, and is more applicable for graphic data encryption. The main superiority of the method is that: the method has enough key space to resist an exhaustive attack, and the change of a key at any bit can completely change an initial value and the parameters of the chaotic sequence. Therefore, the sensitivity of the key is greatly improved; any useful information cannot be exposed by the statistical property; and the relativity of adjacent pixels of an intensity diagram is small and the attack resistance is strong.

Description

technical field [0001] The invention relates to an image group encryption method based on three-dimensional Arnold mapping, belongs to the encryption technology in the field of information security, and is an image data encryption scheme based on s-p network realized by using electronic computer technology and chaotic mapping. Background technique [0002] With the rapid development of the Internet in many fields, modern society relies more and more on the Internet. However, the security issues that appear with the Internet have also become an important aspect that users pay attention to when choosing to use it. In recent years, frequent occurrence of network security accidents has brought huge losses to Internet users ranging from countries to individuals. Therefore, the issue of information security has become a problem that cannot be ignored in the computer field. [0003] With the development of the subject, cryptography has developed into one of the most popular means o...

AI Technical Summary

Problems solved by technology

[0005] Chaotic cryptography is still in the development stage. In recent years, many image encryption schemes about chaotic systems have been presented to everyone, but it has to be said that some low-dimensional chaotic cryptography systems have been proven to have security problems.

For example, using the encryption method of a one-dimensional chaotic system, the key space is not enough, which directly leads to the inability to resist exhaustive attacks. At the same time, it is easy to use the phase space reconstruction method to crack the key, so that it cannot resist known plaintext attacks.

Two-dimensional Cat mapping and Baker mapping cannot guarantee their security under certain parameters

Images