Title: Improvement of chaotic secure communication scheme based on steganographic method and multimodal dynamic maps
Authors: Masoud Khodadadzadeh; H. Gholizadeh-Narm
Addresses: Department of Electrical Engineering, Shahrood University of Technology, Shahrood, Iran ' Department of Electrical Engineering, Shahrood University of Technology, Shahrood, Iran
Abstract: In this paper a novel picture steganographic method using multimodal chaotic maps for improvement of chaotic secure communication is presented. Stego image is sent by modulating parameters of the transmitter. The presented method includes a receiver system for asymptotic convergence which estimates uncertain parameters of Rossler system. The gain of the receiver system changes continuously by a high order sliding mode adaptive controller (HOSMAC), so that system output errors converges to zero. The converged parameters are used to determine the family of maps. After deciding map set, grey level modification for hiding the message is selected and the stego image is produced. Using the synchronisation and chaotic modulation method, the proposed method is studied in the field of secure communications.
Keywords: chaotic synchronisation; multimodal chaotic maps; steganography; grey level modification; GLM; secure communication; sliding mode control; SMC; adaptive control; stego image; chaos; communication security.
International Journal of Systems, Control and Communications, 2015 Vol.6 No.4, pp.305 - 320
Received: 24 Oct 2014
Accepted: 05 Feb 2015
Published online: 16 Oct 2015 *