Image encryption based on 5-D hyper-chaotic and a novel chess game permutation

• Published in: Journal of optics (New Delhi) Vol. 53; no. 3; pp. 2108 - 2141
• Main Authors: Benkhedir, F., Hadj Said, N., Ali Pacha, A., Hadj Brahim, A.
• Format: Journal Article
• Language: English
• Published: New Delhi Springer India 01-07-2024
• Subjects: Lasers; Optical Devices; Optics; Photonics; Physics; Physics and Astronomy; Research Article; Knight tour path; Image encryption; Hyper-chaos 5-D; Rook tour path; Queen tour path; Pawns tour path; King tour path; Chess game; Bishop tour path
• ISSN: 0972-8821; 0974-6900
• DOI: 10.1007/s12596-023-01367-8

In the last few years, information security based on chaotic systems has become increasingly important. This paper proposes a new encryption algorithm by merging a hyper-chaotic system and a famous game, to inject more robustness and information security against attacks. This proposed new cryptosystem is divided into two main random parts: a confusion which is an XOR between an image and a mask created by a 5-D hyper-chaotic system equation. Diffusion is a new permutation technique involving the application of chess moves combined with a hyper-chaotic 5-D system. The algorithm comprises six rounds the number of game pieces, whose cipher image is obtained after a combination of confusion and diffusion applied to the clear image. Experimental and analytical results show that the proposed algorithm demonstrates lossless encryption and decryption, with security tests confirming the good encryption results of our work, a larger key space, with a key size of 2
250
. Numerical simulation demonstrates that the proposed system is safe and reliable for image encryption.