G. Naga Raju, P V Rama Raju, R.L V S S Subbarayudu, K.Maa Lakshmi, R. S S Vidya Sagar and T. Parimala
In modern era, digital image transmission over the internet and storage in databases has become very wide. Security is required to prevent unauthorized access to these. This is achieved by encryption-decryption mechanism. In this paper, a chaos based encryption scheme was proposed which consists of an efficient permutation-diffusion mechanism in which permuting the image pixel positions follows with diffusion i.e., changing the gray value of image pixels so that the relation between original image and cipher image is confused. Original image is obtained from cipher image at the other end through exact reverse process to encryption, called as decryption.
Encryption, Cipher, Chaos, Permutation, Diffusion.