International Journal of Advanced Research in Computer Science and Software Engineering (IJARCSSE)
With the fast evolution of digital data exchange and increased usage of multi media images, it is essential to protect the confidential image data from unauthorized access. In natural images the values and position of the neighboring pixels are strongly correlated. The proposed method breaks this correlation increasing entropy of the position and entropy of pixel values using block shuffling, pixel shuffling and encryption by chaotic logistic maps respectively. In the authors' proposed system the image is divided into blocks and then performs block based shuffling using Arnold Cat transformation.