Image encryption method based on hybrid fractal-chaos algorithm

Abstract

In recent years, there has been an increasing interest in the field of cryptography. Cryptography has applied in diverse applications and the researchers mainly concentrates on Image Encryption (IE) field. This paper proposes a hybrid encryption technique in order to provide high secure transmission. Here, an IE and decryption process is proposed by employing hybrid fractal-chaos technique. This proposed methodology consists of four modules like key generation, fractal encryption, chaos encryption and decryption. Initially, a key that is generated is utilized to encrypt and decrypt the image or data. Subsequently, fractal-IE is carried out by applying L-shaped tromino. Likewise, chaos encryption is carried by employing Discrete Cosine Transform (DCT), to have the final encrypted image. Whereas, the decryption process is carried out using chaos decryption and fractal decryption algorithms. Finally, the experimental outcome confirms that the projected technique delivers high security level network with low computational complexity.