A novel model-based steganographic technique for JPEG images is proposed where themodel, 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.

Peak-Shaped-Based Steganographic Techniques for JPEG Images / L., Rossi; Garzia, Fabio; Cusani, Roberto. - In: EURASIP JOURNAL ON MULTIMEDIA AND INFORMATION SECURITY. - ISSN 1687-4161. - 2009:(2009), pp. 1-20. [10.1155/2009/382310]

Peak-Shaped-Based Steganographic Techniques for JPEG Images

GARZIA, FABIO;CUSANI, Roberto
2009

Abstract

A novel model-based steganographic technique for JPEG images is proposed where themodel, 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.
2009
Steganography; images
01 Pubblicazione su rivista::01a Articolo in rivista
Peak-Shaped-Based Steganographic Techniques for JPEG Images / L., Rossi; Garzia, Fabio; Cusani, Roberto. - In: EURASIP JOURNAL ON MULTIMEDIA AND INFORMATION SECURITY. - ISSN 1687-4161. - 2009:(2009), pp. 1-20. [10.1155/2009/382310]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/76008
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