Paper 2013/078 Original: eprint.iacr.org/2013/078 ↗
Broadcast Steganography
Abstract
We initiate the study of broadcast 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 \emph{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 \emph{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.
Metadata
- Available format(s)
PDF- Category
- Public-key cryptography
- Publication info
- Preprint.
- History
- 2014-03-05: last updated
- 2013-02-20: published
- Short URL
- https://ia.cr/2013/078
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2013/078,
author = {Nelly Fazio and Antonio R. Nicolosi and Irippuge Milinda Perera},
title = {Broadcast Steganography},
howpublished = {Cryptology {ePrint} Archive, Paper 2013/078},
year = {2013},
url = {https://eprint.iacr.org/2013/078}
}