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Showing 1 to 2 of 2 for “"stegocodes"”.
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Achievable rates for queue-based timing stegocodes
This work studies stegocodes (data-hiding codes) for covert communication over timing channels. In a timing channel, the information resides in the packet interdeparture times as opposed to the packets themselves. The en- coding procedure should preserve the statistics of the packet interarrival …
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Graph-based decoders and divergence-rate estimators for data-hiding problems
… propose new tools for steganalysis of queuebased stegocodes over covert timing channels. We propose a universal estimator for the Kullback-Leibler (KL) divergence-rate between the covertext process and the stegotext process. We empirically illustrate the performance of our estimator on some simple …