The unauthorized mixing of data of one sensitivity level and need-to-know with data of a lower
sensitivity level, or different need-to-know, is called data

A.
Contamination

B.
Seepage

C.
Aggregation

D.
Commingling

Explanation:
WOW if you are reading these comments then you know I have disagreed with a bunch of the
original answers! Well here is another. The original was Seepage. I think it is Contamination.
“The intermixing of data at different sensitivity and need-to-know levels. The lower-level data is said
to be contaminated by the higher-level data; thus contaminating (higher-level) data might not
receive the required level of protection” -Ronald Krutz The CISSP PREP Guide (gold edition) pg 890