Title: New chaotic cryptosystem for the image encryption

Authors: Assia Merzoug; Adda Ali-Pacha; Naima Hadj-Said

Addresses: Laboratory of Coding and Security of Information, University Batna 2, 05 avenue Chahid Boukhlouf, Batna 05000, Algeria ' Laboratory of Coding and Security of Information, University of Oran of Sciences and Technology, P.O. Box 1505 Oran M'Naouer 31000, Algeria ' Laboratory of Coding and Security of Information, University of Oran of Sciences and Technology, P.O. Box 1505 Oran M'Naouer 31000, Algeria

Abstract: Recent researches of image encryption algorithms have been increasingly based on chaotic systems. This paper, a new image encryption scheme which employs. The idea is to associate the Hénon attractor and the logistics map, for the construction of a new secret key cryptosystem. We generate values through of the logistics map that will be added to the pixels of the plaintext image. This result modulo 256 will be permuted to another position of the encrypted image. The calculation of this permutation is deducted from the Hénon attractor, which is 2-dimensional, in order to have a significantly increasing the resistance to attacks. The proposed system has the advantage of bigger key space (about 180 bits); high security analysis such as key space analysis, statistical analysis and sensitivity analysis were carried out. The results demonstrate that the proposed system is highly efficient and a robust system.

Keywords: cryptography; secret key; chaos; Hénon map; logistic map.

DOI: 10.1504/IJICS.2020.107452

International Journal of Information and Computer Security, 2020 Vol.12 No.4, pp.450 - 463

Received: 30 Oct 2017
Accepted: 24 May 2018
Published online: 29 May 2020 *

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