%0 Journal Article
%T Peak-Shaped-Based Steganographic Technique for JPEG Images
%A Lorenzo Rossi
%A Fabio Garzia
%A Roberto Cusani
%J EURASIP Journal on Information Security
%D 2009
%I Springer
%R 10.1155/2009/382310
%X A novel model-based steganographic technique for JPEG images is proposed where the model, derived from heuristic assumptions about the shape of the DCT frequency histograms, is dependent on a stegokey. The secret message is embedded in DCT domain through an accurate selection of the potentially modifiable coefficients, taking into account their visual and statistical relevancy. A novel block measure, named discrepancy, is introduced in order to select suitable areas for embedding. The visual impact of the steganographic technique is evaluated through PSNR measures. State-of-the-art steganalytical test is also performed to offer a comparison with the original model-based techniques.
%U http://dx.doi.org/10.1155/2009/382310