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Modelling and Simulation in Engineering
Volume 2017, Article ID 7470204, 12 pages
https://doi.org/10.1155/2017/7470204
Research Article

A Fast Enhanced Secure Image Chaotic Cryptosystem Based on Hybrid Chaotic Magic Transform

1School of Information Technology and Engineering, VIT University, Tamil Nadu, India
2School of Computer Science and Engineering, VIT University, Tamil Nadu, India

Correspondence should be addressed to V. Madhu Viswanatham; ni.ca.tiv@mahtanawsivuhdamv

Received 25 August 2016; Revised 26 October 2016; Accepted 20 November 2016; Published 4 January 2017

Academic Editor: Aiguo Song

Copyright © 2017 Srinivas Koppu and V. Madhu Viswanatham. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

An enhanced secure image chaotic cryptosystem has been proposed based on hybrid CMT-Lanczos algorithm. We have achieved fast encryption and decryption along with privacy of images. The pseudorandom generator has been used along with Lanczos algorithm to generate root characteristics and eigenvectors. Using hybrid CMT image, pixels are shuffled to accomplish excellent randomness. Compared with existing methods, the proposed method had more robustness to various attacks: brute-force attack, known cipher plaintext, chosen-plaintext, security key space, key sensitivity, correlation analysis and information entropy, and differential attacks. Simulation results show that the proposed methods give better result in protecting images with low-time complexity.