Now a day with incredible change in social media network like mobile communication and computer, all type of a data, such as audio, video, images are used for the communication. Privacy for that data is an important issue. Cryptography is one of the techniques used for stopping unauthorized access and increasing integrity of that data. In research area encryption and decryption scheme is used based on image pixel shuffling and transposition. For security purpose, we can use cipher algorithm for generating key using RGB values of the pixel instead of using only pixel values. For that purpose in our proposed system we are using m*n size image on which different operations can be performed. Our proposed system is more secure as compare to existing system.