Peak-Shaped-Based Steganographic Technique for JPEG Images. (10th February 2009)

• Record Type: Journal Article
• Authors: Rossi, Lorenzo; Garzia, Fabio; Cusani, Roberto
• Other Names: Westfeld Andreas Academic Editor.
• Is Part Of: EURASIP journal on information security. Volume 2009(2009)
• Publication Date: 2009-02-10
• Subjects: Computer security -- Periodicals; Computer networks -- Security measures -- Periodicals; Data encryption (Computer science) -- Periodicals; Cryptography -- Periodicals; 005.8
• DOI: 10.1155/2009/382310
• Languages: English
• ISSNs: 1687-417X

Abstract

Abstract : 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.