Image Encryption Method based on Hill Matrix and Dynamic DNA Encoding

Abstract

Based on Hill matrix and dynamic DNA encoding, an image encryption method is proposed. First, this method combines an elliptic curve with a hyper-chaos sequence to fabricate the Hill cipher matrix, and the plaintext image is permuted and encrypted. Second, the dynamic DNA encoding technique is applied to diffuse the gray values of this plaintext image. Finally, hyper-chaos sequences are employed to complete the confusion and diffusion of the image. The experimental results show that the presented method can not only defend against brute-force attacks and statistical attacks but also resist plaintext attacks; in addition, the method has the merits of fast encryption speed, good encryption effects, and easy implementation.