ABSTRACT
Keywords: digital forensics; privacy analysis; JPEG
the random bit stream is input to the compression decompressor can recover the image. Ideal base compressor is established: the compressor must be complete statistical model natural images. In this case, if the sender of an encrypted communication (encrypted stream is a string of random bits), then the compressor is obtained by solving a normal image. In the receiver have the same condition compressor; you can get secret information transmission, which is a perfect steganography program. However, due to a statistical model to get the full picture of the current nature is impossible, so a viable approach is to select a model that contains part of the statistical characteristics of the image. Steganography thus obtained can only be broken Steganography than those who have it good model. So Steganography model model established safety depends on the extent to which said cover image information.
