Journal Article

Image Encryption Algorithm Based on Plane-Level Image Filtering and Discrete Logarithmic Transform

Zhang, Jing, Zhang, Junkun, Zhao, Xiangyu, Qin, Zhentao, He, Yigang, Feng, Wei

2022

Overview

Image encryption is an effective way to protect image data. However, existing image encryption algorithms are still unable to strike a good balance between security and efficiency. To overcome the shortcomings of these algorithms, an image encryption algorithm based on plane-level image filtering and discrete logarithmic transformation (IEA-IF-DLT) is proposed. By utilizing the hash value more rationally, our proposed IEA-IF-DLT avoids the overhead caused by repeated generations of chaotic sequences and further improves the encryption efficiency through plane-level and three-dimensional (3D) encryption operations. Aiming at the problem that common modular addition and XOR operations are subject to differential attacks, IEA-IF-DLT additionally includes discrete logarithmic transformation to boost security. In IEA-IF-DLT, the plain image is first transformed into a 3D image, and then three rounds of plane-level permutation, plane-level pixel filtering, and 3D chaotic image superposition are performed. Next, after a discrete logarithmic transformation, a random pixel swapping is conducted to obtain the cipher image. To demonstrate the superiority of IEA-IF-DLT, we compared it with some state-of-the-art algorithms. The test and analysis results show that IEA-IF-DLT not only has better security performance, but also exhibits significant efficiency advantages.

• Publisher: MDPI AG
• Subject: Algorithms / Chaos theory / cryptanalysis / Data encryption / discrete logarithm / Efficiency / Encryption / image encryption / image filtering / Image filters / Logarithms / Mathematics / Permutations / Pixels / Security / security analysis / Transformations