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.
Explanation:
The Orange book requires protection against two types of covert channels, Timing and Storage.
Incorrect Answers:
B: Storage and low bits is incorrect because, low bits would not be considered a covert channel.
C: Storage and permissions is incorrect because, permissions would not be considered a covert channel.
D: Storage and classification is incorrect because, classification would not be considered a covert channel.