Proposition of a dynamic steganography system based on the chaos properties and image registration for distributing an encryption key
by Rachid Rimani; Naima Hadj-Said; Adda Ali-Pacha
International Journal of Information Privacy, Security and Integrity (IJIPSI), Vol. 4, No. 2, 2019

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.

Online publication date: Wed, 15-Apr-2020

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