Digital Image Encryption Scheme Based on Chaos and Fractal

Abstract

With the rapid development of Internet technology, images are increasingly used as a means of user information exchange. Therefore, ensuring the security of image information has become the focus of attention. Chaos and fractal has the characteristics of self-similarity, pseudo-randomness, and high complexity of image structure, and it’s an important subject in ensuring information security. This paper proposes an image encryption algorithm based on chaotic and fractal. The algorithm uses the Julia set constructed by the Hilbert curve to form the encryption key, and the image is diffused horizontally and vertically. Experimental results show that this algorithm has a large key space, high sensitivity to the initial value of the key, and can resist attacks. The research on the image encryption method proposed in this paper helps to improve the effect of image encryption.