Which of the following can be used as a covert channel?

Which of the following can be used as a covert channel?
A .  Storage and timing.
B .  Storage and low bits.
C .  Storage and permissions.
D .  Storage and classification.

View Answer

Answer: A

Explanation: The Orange book requires protection against two types of covert channels, Timing and Storage.

The following answers are incorrect:

Storage and low bits. Is incorrect because, low bits would not be considered a covert channel. Storage and permissions. Is incorrect because, permissions would not be considered a covert channel. Storage and classification. Is incorrect because, classification would not be considered a covert channel.