Detecting Bitrate Modulation-Based Covert Voice-Over-IP Communication - 2018


Steganography based on bitrate modulation could be a new type of information hiding approach for Voice over IP (VoIP), which can naturally resist state-of-the-art steganalysis schemes, because of inducing no modifications on the concerned protocols and payloads of VoIP packets. To fill this gap, this letter presents a brand new corresponding detection scheme. Specifically, for the present 3 strategies based on bitrate modulation, we have a tendency to initial reveal obvious regularities for the modification intervals of bitrates in steganographic frame streams, which are totally completely different from the traditional streams. Furthermore, exploiting the statistical properties of change intervals, we have a tendency to design a support-vector-machine-based mostly steganalysis scheme. We tend to evaluate the detection performance of the proposed scheme, respectively, with 3 state-of-the-art rate adaptation algorithms as the generators of normal VoIP streams. The results demonstrate that the proposed scheme will effectively detect the existing three bitrate modulation-based steganographic methods, even at relatively low covert bandwidths.

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