earticle

영어

In present era all the multimedia communication is done over open network such as Images, Audio, Videos, Text etc, so the security is also a major concern. In this research we proposed an image encryption algorithm by using chaotic map as it is well known for its Dynamic nature, Randomness and very sensitive towards initial condition. In the pro-posed algorithm two dimensional chaotic map and the two secrets keys for encryption of image are used in which first we divide the image into four blocks and then each block of the image is encrypted individually in n times, after that the keys are inverted for each block and repeat this process up to m times. The proposed work has been rigorously examined over the prevalent standard test and has encouragingly succeeded to pass most of them like key sensitivity analysis, statistical analysis, differential analysis, entropy analysis, which make the proposed algorithm good enough for real time secure communication.