Color image authentication and encryption algorithm based on dual random phase encoding and dual chaotic system

Initially, an improved piecewise Logistic chaotic map is proposed, which is combined with a novel four-dimensional hyperchaotic system to form a dual-chaos system. By introducing dual random phase encoding and leveraging the dual-chaotic system along with Arnold transformation, the authentication image is encrypted. The authentication and encrypted images are combined, and the dual-chaos system along with DNA dynamic encoding and computation methods are employed to perform encryption and decryption on the combined image, thereby achieving both image encryption and authentication. In the performance analysis of the encrypted images, the algorithm proposed in this paper not only provides authentication functionality but also demonstrates strong security, with advantages such as high decryption quality and fast encryption speed. Furthermore, its authentication feature makes it suitable for most encryption scenarios.