Efficient Grayscale Image Encryption Then Compression System

In secret communication, images are widely used and the major issues are how to protect the image and also reduce size of the image in order to maximize the network utilization. Various techniques are there in order to secure the image and to reduce the size of the image. In many practical scenarios, encryption of an image has to be conducted before the image compression. In proposed scheme, both image encryption and image compression system is designed efficiently. In order to get better network utilization, the encrypted images are compressed. An efficient image Encryption Then Compression(ETC) system is designed. In proposed scheme prediction error domain is used to encrypt the image in order to get high security. Keywords— Encryption, Compression, Prediction error domain.