Image Encryption in IOT Using Hyper-chaotic System
International journal of intelligent engineering and systems · 2023
The rapid development of IOT and the ease of capturing and transmitting digital images have increased the demand for image encryption.Despite the availability of various encryption methods, chaos-based image encryption is the most suitable method for image applications due to its sensitivity to initial conditions and control parameters.Many image encryption schemes have been developed to enhance the security of images by using chaotic maps, but they cannot combat all possible threats from the cryptanalysis community.This study presents a new chaosbased substitution box (S-box) and its application for securing images.The construction of the presented S-box approach is based on a new five-dimensional hyper-chaotic system, and the experimental results prove that the suggested S-box approach has high nonlinearity and good cryptographic characteristics.In addition, we utilize the effectiveness of the presented S-box approach in designing a novel lightweight image encryption/decryption scheme.Results demonstrate that this scheme has a sufficient peak signal-to-noise ratio, a low correlation, and a large key space.These factors make it more efficient than its classical counterpart and allow it to resist statistical and differential attacks.The number of changing pixel rate (NPCR) and the unified averaged changed intensity (UACI) values were 99.623 and 33.532, respectively.The entropy oscillates from 7.9965 to 7.9971 for the tested encrypted images.These criteria indicate an efficient, fast, and robust scheme that can be used for secure image transmission via public channels.