Error correction and erasure codes for robust network steganography

Error correction and erasure codes and steganographic channels use related methods, but are investigated separately. We detail an idea from literature for a steganographic channel in a transmission with error correction code and experimentally investigate it with respect to bandwidth, robustness and detectability. We expand this construction to provide an example of multi-level steganography, i.e., a steganographic channel within a steganographic channel. Furthermore, we investigate the advantages on bandwidth and stealthyness that reversibility of such a steganographic channel brings, together with a new proposal for a covert channel in error-corrected data.