[Resource Topic] 2005/305: Steganography with Imperfect Samplers

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Steganography with Imperfect Samplers

Authors: Anna Lysyanskaya, Maria Meyerovich


The goal of steganography is to pass secret messages by disguising
them as innocent-looking covertexts. Real world stegosystems are
often broken because they make invalid assumptions about the system’s
ability to sample covertexts. We examine whether it is possible to
weaken this assumption. By modeling the covertext distribution as a
stateful Markov process, we create a sliding scale between real world
and provably secure stegosystems. We also show that insufficient
knowledge of past states can have catastrophic results.

ePrint: https://eprint.iacr.org/2005/305

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