Detection of image authentication using predictive lossless coding

Image authentication plays an important role in the peer-to-peer (P2P) file sharing system. In the file sharing process, there is a chance for alteration of the original contents by unknown intermediaries. In the present study, an attempt is made to identify the malicious attack in the original image by predictive lossless coding. In order to authenticate the received image, a predictive encoded quantized image is used. This method provides the desired robustness against legitimate variations while detecting illegitimate modification. Predictive lossless coding provides rate-efficient encoding of the projection by exploiting the correlation between the projections of the original and received images.