Title: Proposition of a dynamic steganography system based on the chaos properties and image registration for distributing an encryption key

Authors: Rachid Rimani; Naima Hadj-Said; Adda Ali-Pacha

Addresses: Laboratory of Coding and Security of Information, University of Sciences and Technology of Oran Mohamed Boudiaf (USTOMB), P.O. Box 1505 Oran M'Naouar 31000, Algeria; University Mustapha Stambouli of Mascara, Algeria ' Laboratory of Coding and Security of Information, University of Sciences and Technology of Oran Mohamed Boudiaf (USTOMB), P.O. Box 1505 Oran M'Naouar 31000, Algeria ' Laboratory of Coding and Security of Information, University of Sciences and Technology of Oran Mohamed Boudiaf (USTOMB), P.O. Box 1505 Oran M'Naouar 31000, Algeria

Abstract: Keys have a crucial role in the security of cryptosystems and their distribution is an important primitive in cryptography. This article presents a new dynamic system of steganography (data hiding) for concealing data in a particular sequence of images intended to regulate in an unlimited time the secure transfer of the key between the different correspondents; the proposed key exchange protocol using an image registration system and a chaotic sequence is comparable to the Diffie-Hellman key exchange protocol. The use of chaos makes it possible to increase the level of confidentiality by sending to the receiver a register which contains parameters of a chaotic sequence; knowing these parameters, the receiver can extract the chaotic sequence. The purpose of using the image registration is to find the transformation between two or several images; these transformations become a tool with the chaotic sequence calculated to recover the key on the receiver side.

Keywords: chaotic sequence; concealing data; Diffie-Hellman key exchange; dynamic system; image registration; key exchange protocol; recover the key; secure transfer; steganography; transformation.

DOI: 10.1504/IJIPSI.2019.106573

International Journal of Information Privacy, Security and Integrity, 2019 Vol.4 No.2, pp.79 - 93

Received: 22 Jan 2019
Accepted: 22 Jun 2019
Published online: 15 Apr 2020 *

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