A hyper-chaotic system and adaptive substitution box (S-Box) for image encryption

Abstract

the inclusion of chaos to encrypt multimedia information has been a remarkable feature of nonlinear dynamics for the last three decades. A hyper-chaotic system and a Substitution S-Box for image encryption are included in this article. Substitution is built by adapting the Rijndael S-Box into one dimension to minimize converting between digital systems using the same safety key for safe communication during the encryption process. This concept of chaos-based encryption and substitution box provides comparatively enhanced results by better CPU encryption time for images colored 256x256 to 0.2485 seconds, and 512x512 to 0.3665 seconds. According to the results of the testing, the proposed image encryption algorithm is highly safe, resistant against image processing attacks, and fast for the image encryption application as depicted in security analysis.