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Unconditionally Secure Steganography Against Active Attacks

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2 Author(s)
Shikata, J. ; Grad. Sch. of Environ. & Inf. Sci., Yokohama Nat. Univ., Yokohama ; Matsumoto, T.

In this paper, we study unconditionally secure stegosystems against active attacks over an insecure channel in which an adversary can read and write a message. More specifically, we propose an information-theoretic model for steganography in the presence of active adversaries by extending both Simmons' and Cachin's works; and we show a generic construction of stegosystems secure against active attacks by using authenticated encryption in unconditional setting. Although the idea behind this construction is already used in different models (i.e., computational models and/or information-theoretic models with passive adversaries) of steganography, our contribution lies in showing the construction methodology provides provable and unconditional security against active adversaries.

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Information Theory, IEEE Transactions on  (Volume:54 ,  Issue: 6 )