Chaotic cryptography using external key

In this paper, a new chaotic encryption using multiple one-dimensional chaotic maps is introduced. This encryption method shows a significant improvement in terms of efficiency as well as security level. The proposed cryptosystem further produces the cipher-image having flat distribution. In the encryption phase, the pixels are encrypted using an iterative cipher module based feedback and data-dependent inputs mechanism for mixing the current encryption parameters with previously encrypted information. Some experimental results are given in order to demonstrate the efficiency of the proposed scheme. In our experimental results, a color image is evaluated. Some security analysis on the proposed image encryption scheme which demonstrated the satisfactory security of the proposed scheme, are described.