文章基本信息

标题：ENHANCEMENT OF AES ALGORITHM BASED ON CHAOTIC MAPS AND SHIFT OPERATION FOR IMAGE ENCRYPTION
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作者：ALI ABDULGADER ; MAHAMOD ISMAIL ; NASHARUDDIN ZAINAL 等
期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2015
卷号：71
期号：1
出版社：Journal of Theoretical and Applied
摘要：With the rapid development of the Internet and communication networks, the confidentiality of digital images transmitted over public networks must be preserved by using encryption techniques. Advanced Encryption Standard (AES) is one of the most commonly used encryption algorithms at present. Although AES has several advantages, such as security in data encryption, it also has a number of drawbacks, such as high computations, pattern problems when used for encrypting images, and fixed S-box weak points. This paper proposes a method that overcomes the fixed S-box weak points and improves the performance of AES when used for encrypting images, particularly when the image data are large. In addition, the MixColumn stage is replaced by chaotic mapping and XOR operation to reduce the high computations in MixColumn transform. The proposed method is tested on several images, and the results show that the proposed method efficiently generated cipher images with very low correlation coefficients of adjacent pixels and provided better encryption speed and high security as a result of the dependence of the S-box on the key characteristics of the chaotic system.
关键词：AES; S-Box; Cyclic Shifting Operation; Inverse S-Box; Round Key; Chaotic Map.