Proposition of a dynamic steganography system based on the chaos properties and image registration for distributing an encryption key. (14th April 2020)

• Record Type: Journal Article
• Authors: Rimani, Rachid; Hadj-Said, Naima; Ali-Pacha, Adda
• Is Part Of: International journal of information privacy, security and integrity. Volume 4:Number 2(2019)
• Page Start: 79
• Page End: 93
• Publication Date: 2020-04-14
• Subjects: chaotic sequence -- concealing data -- Diffie-Hellman key exchange -- dynamic system -- image registration -- key exchange protocol -- recover the key -- secure transfer -- steganography -- transformation; Computer security -- Periodicals; Computer networks -- Access control -- Periodicals; Information technology -- Security measures -- Periodicals; Data protection -- Periodicals; Privacy, Right of -- Periodicals; 005.805
• Languages: English
• ISSNs: 1741-8496

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.