Broadcast Steganography
نویسندگان
چکیده
We initiate the study of broadcast steganography (BS), an extension of steganography tothe multi-recipient setting. BS enables a sender to communicate covertly with a dynamicallydesignated set of receivers, so that the recipients recover the original content, while unauthorizedusers and outsiders remain unaware of the covert communication. One of our main technicalcontributions is the introduction of a new variant of anonymous broadcast encryption that weterm outsider-anonymous broadcast encryption with pseudorandom ciphertexts (oABE$). OuroABE$ construction achieves sublinear ciphertext size and is secure in the standard model.Besides being of interest in its own right, oABE$ enables an efficient construction of BS securein the standard model against adaptive adversaries with sublinear communication complexity.
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عنوان ژورنال:
- IACR Cryptology ePrint Archive
دوره 2013 شماره
صفحات -
تاریخ انتشار 2013