Behavior-based covert channel in cyberspace

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Title: Behavior-based covert channel in cyberspace
Author: Johnson, Daryl; Yuan, Bo; Lutz, Peter
Abstract: Many covert channels take advantages of weaknesses, flaws, or unused data fields in network protocols. In this paper, a behavior-based covert channel, that takes advantages of behavior of an application, is presented along with a formal definition in the framework of finite state machines. The behavior-based covert channel is application specific and lies at the application layer of the network OSI model, which makes the detection of this type of covert channel much more difficult. A detailed sample implementation demonstrates an example of this type of covert channel in the form of a simple online two-person game. The potential of this type of covert channel is also discussed.
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Date: 2009

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