Component Fusion Image Encryption Method Based on Composite Chaotic Model

In order to improve the security and encryption performance of component fusion image encryption, a method of component fusion image encryption is proposed based on composite chaotic model. A component fusion image is decomposed into three grayscale images, and a composite chaotic model is constructed by using Logistic chaotic map and Hyperhenon chaotic map, and the chaotic algorithm is combined with traditional cyclic encryption. The chaotic system with dynamic initial conditions is used to generate three pseudorandom sequences to encrypt the fused image. The encryption key generated by the logistic chaotic sequence is replaced by the encryption key in the Hyperhenon chaotic sequence to generate the image encryption sequence. The vector quantization coding of image encryption is carried out by piecewise linear chaotic mapping, and the optimal design of image encryption algorithm is realized. The simulation results show that the proposed method has good fusion performance and strong anti-attack ability to ensure the security and stability of image transmission.