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Covert channel detection using Information Theory

By Loïc Hélouët and Aline Roumy


This paper presents an information theory based detection framework for covert channels. We first show that the usual notion of interference does not characterize the notion of deliberate information flow of covert channels. We then show that even an enhanced notion of "iterated multivalued interference" can not capture flows with capacity lower than one bit of information per channel use. We then characterize and compute the capacity of covert channels that use control flows for a class of systems.Comment: In Proceedings SecCo 2010, arXiv:1102.516

Topics: Computer Science - Cryptography and Security, Computer Science - Information Theory
Year: 2011
DOI identifier: 10.4204/EPTCS.51.3
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