Which one of the following is a security issue related to aggregation in a database?

A.
Polyinstantiation

B.
Inference

C.
Partitioning

D.
Data swapping

Explanation:
Inference is the ability of users to infer or deduce information about data at sensitivity levels for
which they do not have access privileges. –Ronald Krutz The CISSP PREP Guide (gold edition) pg 358
The other security issue is inference, which is very similar to aggregation. – Shon Harris All-in-one
CISSP Certification Guide pg 727 Partitioning a database involves dividing the database into different
parts, which makes it much harder for an unauthorized individual to find connecting pieces of data
that can be brought together and other information that can be deduced or uncovered. – Shon
Harris All-in-one CISSP Certification Guide pg 726 Polyinstantiation- This enables a relation to contain
multiple tuples with the same primary keys with each instance distinguished by a security level. –
Shon Harris All-in-one CISSP Certification Guide pg 727