Steganalytic method based on short and repeated sequence distance statistics

According to the distribution characteristics of short and repeated sequence (SRS),a steganalytic method based on the correlation of image bit planes is proposed. Firstly,we provide the conception of SRS distance statistics and deduce its statis-tical distribution. Because the SRS distance statistics can effectively reflect the correlation of the sequence,SRS has statistical features when the image bit plane sequence equals the image width. Using this characteristic,the steganalytic method is fulfilled by the distinct test of Poisson distribution. Experimental results show a good performance for detecting LSB matching steganographic method in still images. By the way,the proposed method is not designed for specific steg-anographic algorithms and has good generality.