A Novel Technique for the Generation and Application of Substitution Boxes (s-box) for the Image Encryption | [Nucleus • 2018]

Author(s):

1. S. Bukhari: Department of Electronic Engineering, University College of Engineering & Technology, The Islamia University of Bahawalpur,Bahawalpur,Pakistan

2. A. Yousaf: Department of Mathematics, The Islamia University of Bahawalpur,Bahawalpur,Pakistan

3. S. Niazi: Department of Electronic Engineering, University College of Engineering & Technology, The Islamia University of Bahawalpur,Bahawalpur,Pakistan

4. M. R. Anjum: Department of Electronic Engineering, University College of Engineering & Technology, The Islamia University of Bahawalpur,Bahawalpur,Pakistan

Abstract:

The increasing applications of image processing have shifted the focus to the security of images during their transmission. In this work, the main focus is on the security of gray scale images against cryptanalysis attacks. A new model for encryption algorithm of the grayscale image is presented through substitution boxes (s-box). The proposed technique contains two parts; in the first part six different substitution boxes are generated from Galois field and linear fractional transformations. In the second part, the generated substitution boxes are used for the encryption process of message image. For the estimation of the strength of the proposed technique; nonlinearity and strict avalanche criteria, statistical tests (contrast, correlation, energy and homogeneity) and histogram analysis were performed on the substitution boxes and on the encrypted images respectively to check its resistance. The proposed algorithm is found to be more robust as compared to other encryption techniques against attacks in insecure transmission paths.

Page(s): 219-225

DOI: DOI not available

Published: Journal: Nucleus, Volume: 55, Issue: 4, Year: 2018

Keywords:

statistical analysis , Substitution box , Nonlinearity , Strict avalanche criteria , Galois field , Linear fraction transformation

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