The best definition of a covert channel is:
C. A communication channel that allows the transfer of information in a manner that violates the system's security policy.
Covert channels are methods or paths within a system that allow information to be transferred in a way that circumvents or violates the system's intended security policies or restrictions. These channels are typically used to bypass normal security controls, enabling unauthorized communication or information transfer.
A covert channel is a communication channel that allows the transfer of information in a manner that violates the system's security policy. Covert channels are typically used to circumvent security controls and transfer information between entities in a way that is not explicitly authorized.
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