文章基本信息

标题：A Novel Hyper-Chaos-Based Image Encryption Algorithm Using Bit-Level Permutation and Pixel-Level Diffusion
作者：Yajuan Li ; Ruisong Ye ; Yucheng Chen 等
期刊名称：International Journal of Computer Trends and Technology
电子版ISSN：2231-2803
出版年度：2018
卷号：62
期号：1
DOI：10.14445/22312803/IJCTT-V62P106
出版社：Seventh Sense Research Group
摘要：In this paper, a 4D Lorenz map is proposed using in cryptography. Performance evaluations show that it has hyperchaotic behavior, wide chaotic range and large complexity. Based on this map, a novel image encryption algorithm is designed by employing bitlevel permutation and pixellevel diffusion. The bitlevel permutation is performed by chaotic sequence, and the bitlevel diffusion is carried out by Arithmetic plus. Besides, to achieve the better ability of resisting chosenplaintext or knownplaintext attack, the substitution key stream generated using SHA256 in our method is dependent on the plain image. Consequently, different plain images produce the distinct key stream for substitution. The simulation results and performance analysis show that the proposed image encryption algorithm is both secure and reliable for image encryption.
关键词：4-D hyper-chaotic maps; Bit-level; Image encryption; SHA-256