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Erschienen in:
2009 | OriginalPaper | Buchkapitel
Non-malleable Schemes Resisting Adaptive Adversaries
verfasst von : Johann Barbier, Emmanuel Mayer
Erschienen in: Digital Watermarking
Verlag: Springer Berlin Heidelberg
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In this paper, we focus on security models in steganography. We first recall classical security models both in cryptography and in steganography. We rely on these models to propose the definitions of the malleability-based models of security for private key steganographic schemes. We also prove that the indistinguishability-based security under the hypothesis of a chosen hidden text adaptive attack (IND-CHA2) implies malleability-based security under the same hypothesis (NM-CHA2). This connection gives us some keys to explain why many practical steganography schemes do not resist adaptive adversaries. Finally, we propose a generic construction to overcome the intrinsic vulnerability of many of them induced by the malleability property.