Lilia Maalej

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Covert channels exist in most communications systems and allow individuals to communicate truly undetectable and exchange hidden information. That's why their detection seems to be a big deal for security systems. However, till now, security systems do not include dedicated processes for covert channel detection. In this paper, we first propose mechanisms(More)
IEEE 802.11e is a wireless local area networking standard introducing quality of service. It defines new MAC protocols, mainly HCF and EDCF. EDCF is a contention-based channel access scheme and is part of HCF for infrastructure networks and may be used as a separate coordination function for wireless ad-hoc networks. The aim of this paper is to propose a(More)
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