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2008
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Predictable Design of Network-Based Covert Communication Systems

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Predictable Design of Network-Based Covert Communication Systems
This paper presents a predictable and quantifiable approach to designing a covert communication system capable of effectively exploiting covert channels found in the various layers of network protocols. Two metrics are developed that characterize the overall system. A measure of probability of detection is derived using statistical inference techniques. A measure of reliability is developed as the bit error rate of the combined noisy channel and an appropriate error-correcting code. To support reliable communication, a family of error-correcting codes are developed that handle the high symbol insertion rates found in these covert channels. The system metrics are each shown to be a function of the covert channel signal-to-noise ratio, and as such the two can be used to perform system level design trade-offs. Validation of the system design methodology is provided by means of an experiment using real network traffic data.
Ronald William Smith, George Scott Knight
Added 15 Dec 2010
Updated 15 Dec 2010
Type Journal
Year 2008
Where SP
Authors Ronald William Smith, George Scott Knight
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