R. Raja Kumar¹, A. Sampath¹ and P. Indumathi², ¹Sathyabama University, India and ²Anna University - Chennai, India

The focus of this paper is to improve the level of security and secrecy provided by the chaotic map based image encryption.An encryption algorithm based on the Logistic and the Henon maps is proposed. The algorithm uses chaotic iteration to generate the encryption keys, and then carries out the XOR and cyclic shift operations on the plain text to change the values of image pixels. Chaotic Map Lattice based image encryption algorithm suggested by Pisarchik is also examined which is based on Logistic map alone. In experiments, the corresponding results showed the proposed method is a promising scheme for image encryption in terms of security and secrecy. At the end, we show the results of a security analysis and a comparison of both schemes.

Image Encryption, Security, Chaotic Map Lattice, Binary sequence, Key space.