Image Encryption Design Based on Henon Mapping
Wenyi Su, Mingjie Zhou, Jiaqing Bao, Lanjing Yang, Liping Zhu, Guodong Li · 2024
Image data, compared to textual information, possesses visual characteristics that require novel encryption methods to ensure its security. Therefore, it is necessary to explore new encryption techniques tailored specifically for image data. By applying the Henon chaotic map, two random sequences are generated. These sequences, along with a given key, are used to produce four equally-sized random matrices through specific formulas. Two of these matrices are employed in the forward and backward diffusion modules, while the remaining two are utilized in the permutation module. Through two rounds of diffusion operations and one permutation operation, the four random matrices are utilized to encrypt the image, resulting in a secure, encrypted image. The security performance of this encryption algorithm is analyzed theoretically, considering encryption and decryption speeds, histogram statistical characteristics, correlations between adjacent pixels, and information entropy. Additionally, simulation experiments demonstrate the effectiveness of this digital image encryption scheme, showcasing excellent encryption results and security performance.