Image encryption method based on 3D orthogonal Latin square and chaotic system

Abstract

The invention provides an image encryption method based on a 3D orthogonal Latin square and a chaotic system. The method comprises the steps of 1, preprocessing a plaintext image P to obtain a preprocessed image P2; wherein the preprocessing comprises the steps that a 4D memristor chaotic system is utilized to generate a random number sequence according to the information entropy of the plaintextimage P, the random number sequence is embedded into the plaintext image P to obtain an embedded image P1, and letter XOR operation is carried out on the embedded image P1; 2, generating a 3D orthogonal Latin party according to the index sequence and the control parameters; and step 3, converting the preprocessed image P2 into a 3D bit matrix, and performing scrambling operation and diffusion operation on the 3D bit matrix by using the 3D orthogonal Latin method to obtain a ciphertext image corresponding to the plaintext image P. The method solves the problems that a scrambling method is invalid for special image scrambling and low in algorithm efficiency, is highly sensitive to plaintext images, can effectively resist known plaintext and selected plaintext attacks, and has high safety performance.

Description

technical field [0001] The invention relates to the technical field of image encryption, in particular to an image encryption method based on a 3D orthogonal Latin square and a chaotic system. Background technique [0002] With the rapid development of Internet technology and communication technology, more and more digital images are used in different fields, such as disaster detection, military reconnaissance, telemedicine, etc. Digital images are intuitive, vivid, and realistic, and have become one of the main media for our information exchange in our daily life. However, digital images often involve personal privacy or sensitive information. In the process of public network transmission and storage, there are insecurity problems such as interception by hackers, tampering or transaction leakage. Therefore, the security of image transmission has become a hot issue in academic research and practical application, and image encryption is the most effective technology to prote...

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Problems solved by technology

[0006] Aiming at the problem that the scrambling method existing in the existing image encryption method is invalid for special image scrambling, and the encryption method itself has little correlation with plaintext image information, the present invention provides a 3D orthogonal Latin square and chaotic system based

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