TY - GEN
T1 - Broadcast steganography
AU - Fazio, Nelly
AU - Nicolosi, Antonio R.
AU - Perera, Irippuge Milinda
PY - 2014
Y1 - 2014
N2 - We initiate the study of steganography (BS), an extension of steganography to the multi-recipient setting. BS enables a sender to communicate covertly with a dynamically designated set of receivers, so that the recipients recover the original content, while unauthorized users and outsiders remain unaware of the covert communication. One of our main technical contributions is the introduction of a new variant of anonymous broadcast encryption that we term outsider-anonymous broadcast encryption with pseudorandom ciphertexts((oABE$). Our oABE$ 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 secure in the standard model against adaptive adversaries with sublinear communication complexity.
AB - We initiate the study of steganography (BS), an extension of steganography to the multi-recipient setting. BS enables a sender to communicate covertly with a dynamically designated set of receivers, so that the recipients recover the original content, while unauthorized users and outsiders remain unaware of the covert communication. One of our main technical contributions is the introduction of a new variant of anonymous broadcast encryption that we term outsider-anonymous broadcast encryption with pseudorandom ciphertexts((oABE$). Our oABE$ 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 secure in the standard model against adaptive adversaries with sublinear communication complexity.
KW - Broadcast Encryption
KW - Receiver Anonymity
KW - Steganography
UR - http://www.scopus.com/inward/record.url?scp=84901282160&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84901282160&partnerID=8YFLogxK
U2 - 10.1007/978-3-319-04852-9_4
DO - 10.1007/978-3-319-04852-9_4
M3 - Conference contribution
AN - SCOPUS:84901282160
SN - 9783319048512
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 64
EP - 84
BT - Topics in Cryptology, CT-RSA 2014 - The Cryptographer's Track at the RSA Conference 2014, Proceedings
T2 - 2014 Conference on Cryptographer's Track at the RSA, CT-RSA 2014
Y2 - 25 February 2014 through 28 February 2014
ER -