Lossy Compression and Reconstruction for Encrypted Image

This paper introduces a novel scheme for Lossy compression of an encrypted image with flexible compression ratio. Usually we first compress an image, and then encrypt it. Here first encrypt the image, and then compress it. At the transmitter side compression of the original image is made by Discrete Cosine Transform (DCT).At the receiver side image reconstructed by Inverse Discrete Cosine Transform (IDCT). The novelty of this paper is reversing the order of steps usually preferred, that is first encrypting and then compressing.