A color image encryption algorithm based on Logistic-Tent map, dynamic S-box, and bit-plane operations

Le résumé fourni par la source

Abstract With the increasing threats of image data leakage and misuse, image encryption has become a vital approach to protecting visual content. However, existing methods often face security risks due to insufficient confusion or inadequate diffusion. To address these limitations, this paper proposes a dynamic S-box with high nonlinearity, low differential uniformity, and near-ideal SAC. Building upon this S-box, the algorithm independently processes each RGB channel through bit-plane encryption, followed by pixel-level scrambling and bidirectional diffusion. This S-box-centric design ensures comprehensive security across numerical, bit, and spatial domains. Experimental results show that the key space reaches 2 256 , encryption time is about 1 s, and information entropy exceeds 7.999. The algorithm also exhibits strong resistance to noise and cropping attacks, with NPCR and UACI values close to theoretical ideals. It thus provides a reliable solution for protecting sensitive information in fields such as secure image transmission and medical imaging.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.