Dual Image Encryption and Decryption Using Cellular Automata and Blowfish Algorithm

-This research article focuses on image processing and encryption techniques. Image encryption is very vast field and currently over World Wide Web and security is main issue. It presents the technique of image encryption by using cellular automata. The image is splitted in number of pixels, block of pixels are created to be encrypted using blowfish algorithm, and these encrypted blocks are considered afterwards as cells for cellular automata, so that the rules on the image cell blocks are properly applied. The core theme is to double encrypt the image before transmission by using blowfish algorithm for effective communication. Decryption is done at the receiving end using inverse transformation, which operates on backtracking procedure. Such technique of dual encryption leads us in achieving enhanced security under space and time constraint.