This paper presented a subset of affine transformation with integer coefficients and invariance of image area to realize the scrambling of digital image,a perfect steganographic encoding scheme based on linear block code theory LSB stegano-graphy,which made the embedded messages have more steganalysis counteraction ability.

Image steganalysis based on statistical characteristics of DCT coefficients and SVM;

LSSVM-based blind steganalysis for JPEG images;

In this paper, a novel steganalysis method is proposed on the basis of statistical discrepancies of wavelet sub-band coefficients of an image between its hidden information version.