A Robust and Fast Image Encryption Scheme Based on a Mixing Technique

方案(数学) 密文 图像(数学) 明文 钥匙(锁) 密码学
作者
Lee Mariel Heucheun Yepdia,Alain Tiedeu,Guillaume Honoré Kom
出处
期刊:Security and Communication Networks [Hindawi Limited]
卷期号:2021: 1-17 被引量:1
标识
DOI:10.1155/2021/6615708
摘要

This paper introduces a new image encryption scheme using a mixing technique as a way to encrypt one or multiple images of different types and sizes. The mixing model follows a nonlinear mathematical expression based on Cramer’s rule. Two 1D systems already developed in the literature, namely, the May-Gompertz map and the piecewise linear chaotic map, were used in the mixing process as pseudo-random number generators for their good chaotic properties. The image to be encrypted was first of all partitioned into N subimages of the same size. The subimages underwent a block permutation using the May-Gompertz map. This was followed by a pixel-based permutation using the piecewise linear chaotic map. The result of the two previous permutations was divided into 4 subimages, which were then mixed using pseudo-random matrices generated from the two maps mentioned above. Tests carried out on the cryptosystem designed proved that it was fast due to the 1D maps used, robust in terms of noise and data loss, exhibited a large key space, and resisted all common attacks. A very interesting feature of the proposed cryptosystem is that it works well for simultaneous multiple-image encryption.
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