[单选题]
Which one of the following is concerned with masking the frequency, length, and origin-destination patterns of the communications between protocol entities?
A. Masking analysis
B. Protocol analysis
C. Traffic analysis
D. Pattern analysis
[单选题]
Which one of the following is concerned with masking the frequency, length, and origin-destination patterns of the communications between protocol entities?
A. Masking analysis
B. Protocol analysis
C. Traffic analysis
D. Pattern analysis