Article | REF: H5860 V1

Hidden channels

Author: Frédéric RAYNAL

Publication date: October 10, 2003 | Lire en français

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    4. Generalization

    The implementation of a covert channel relies on two distinct issues: on the one hand, the information transport vector, and on the other, the way in which the information is encoded. In this section, we focus on both aspects.

    4.1 A vehicle for communication

    In the context of networks, there are usually two ways of constructing a covert channel:

    • use "neglected" data;

    • modify a field used by the protocol.

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