An image encryption scheme using mixed high dimensional chaotic system combined with Fast Fourier Transform

For the deficiencies of the current number of low-dimensional chaotic systems or fractional Fourier transform in image encryption, it presents an image encryption scheme using mixed high dimensional chaotic system combined with Fast Fourier Transform (FFT). The method mixes a number of high-dimensional chaotic systems to generate the encryption sequences for the image position scrambling and pixel XOR encryption, then performs FFT of encrypted image. So that it increases the complexity of the encrypted image and sensitivity of the original image, reduces the correlation of the encrypted image pixels and enhances secrecy and anti-attack capability of the image. Compared with the other three different encryption algorithms, it verifies that the proposed image encryption scheme in this paper can completely restore the original image, increase the complexity and anti-attack capability of the encrypted image, and the proposed scheme also provides a more secure, more complex, more effective encryption method.