Chaos-Based ETC System with ANM

Abstract

Information and communication technology is the back bone of a number of momentous innovations in research, industry and in society. Network and mobile communications made a change in lifestyles leasing people to exchange information from any place at any point of time. Huge amount of data is transferred every second and the use of digital images are also increased. Digital images require more time for transmission because of their larger size. Hence, it is important to compress the images before transmission to improve the processing speed. Encryption technique is used to provide security for images. This paper proposes an image Encryption-then-Compression (ETC) system. A chaotic encryption technique is used to encrypt the images and Asymmetric Numeral Method (ANM) is used to compress the encrypted images. The performance results are carried out for various image sizes and compared with Arithmetic and Huffman compression techniques and it shows that the proposed system is better in terms of security, compression ratio and computation time.