Explanation/Reference:
Explanation:
Aggregation is the act of combining information from separate sources. The combination of the data forms new information, which the subject does not have the necessary rights to access. The combined information has a sensitivity that is greater than that of the individual parts.
Incorrect Answers:
A: Polyinstantiation enables a table, which is also known as a relation, to contain multiple tuples with the same primary keys, with each instance distinguished by a security level. At a lower security level the tuple will not contain sensitive data and it will effectively be hidden from users who do not have the appropriate access permissions.
B: Inference is the intended result of aggregation. The inference problem happens when a subject deduces the full story from the pieces he learned of through aggregation. This is seen when data at a lower security level indirectly portrays data at a higher level.
D: Data mining is about finding new information in a lot of data. Sensitivity or security is not related to data mining.
References:
Conrad, Eric, Seth Misenar and Joshua Feldman, CISSP Study Guide, 2nd Edition, Syngress, Waltham,
2012, p. 1183
Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, New York, 2013, pp. 1186, 1188