Paper Details: Downloads: 644
Serial Number: P1151106495
Title: Robust Chaotic Image Encryption based on Perturbation Technique
Authors: D. Chattopadhyay and M. K. Mandal and D. Nandi
Abstract: The paper is devoted to implement and analyze a chaos based image encryption technique using the method of parameter modulation. The robustness of the system to opponents’ attack is enhanced by using only two rounds of iteration. The parameter modulation technique has reduced the problem of dynamical degradation. The algorithm has a large (256 bits: 128 bits for each round) key space to protect the system against Brute-force and statistical attacks. At the same time, the algorithm exhibits good encryption and security performances. The simulation results and cryptanalysis show that the chaotic signals are greatly sensitive to the key. Uniformity of the encrypted image histogram is demonstrated and analyzed. The vertical, horizontal and diagonal correlation co-efficients along with their RMS and average values for the encrypted image are calculated. Number of pixels change rate (NPCR) and unified average changing intensity (UACI) have been calculated to measure the difference between the plaintext and the corresponding ciphertext. These values are considerably improved in the proposed technique.
Keywords: Image encryption/decryption, DQM, NPCR, UACI, Dynamical degradation
Journal/Conference: International Journal of Graphics, Vision and Image Processing
Volume: 11
Issue: 2
Submission Date: 2/8/2011 12:00:00 AM
Review Date: 3/2/2011 12:00:00 AM
Publishing Date: 3/21/2011 12:00:00 AM
Article Downloads: 644
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