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