How would you describe a simple yet very effective mechanism for sending and receiving unauthorized information or data between machines without alerting any firewalls and IDS's on a network?

How would you describe a simple yet very effective mechanism for sending and receiving unauthorized information or data between machines without alerting any firewalls and IDS’s on a network?

A.
Crafted Channel

B.
Deceptive Channel

C.
Bounce Channel

D.
Covert Channel

Explanation:
A covert channel is described as: “any communication channel that can be exploited by a process to transfer information in a manner that violates the systems security policy.” Essentially, it is a method of communication that is not part of an actual computer system design, but can be used to transfer information to users or system processes that normally would not be allowed access to the information.