Enhancement of AES algorithm based on chaotic maps and shift operation for image encryption

Ali Abdulgader, Mahamod Ismail, Nasharuddin Zainal, Tarik Idbeaa

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)1-12
Number of pages12
JournalJournal of Theoretical and Applied Information Technology
Volume71
Issue number1
Publication statusPublished - 1 Jan 2015

Fingerprint

Advanced Encryption Standard
Image Encryption
Chaotic Map
Cryptography
Enhancement
S-box
Encryption
Confidentiality
Digital Image
Communication Networks
Correlation coefficient
Chaotic System
Chaotic systems
Adjacent
Pixel
Transform
Telecommunication networks
Pixels
Internet

Keywords

  • AES
  • Chaotic Map
  • Cyclic Shifting Operation
  • Inverse S-Box
  • Round Key
  • S-Box

ASJC Scopus subject areas

  • Computer Science(all)
  • Theoretical Computer Science

Cite this

Enhancement of AES algorithm based on chaotic maps and shift operation for image encryption. / Abdulgader, Ali; Ismail, Mahamod; Zainal, Nasharuddin; Idbeaa, Tarik.

In: Journal of Theoretical and Applied Information Technology, Vol. 71, No. 1, 01.01.2015, p. 1-12.

Research output: Contribution to journalArticle

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