The McCumber Model is a cube with three faces; each face has three items. It is intended to cause us to think about three areas of information with respect to information security. What are the three areas? That is, what do the three faces of that cube represent?

The three faces are information states, security goals, countermeasures.

Explanation:

Each face has different subjects about Informatics security, we will start with:

Information States

Storage is how we save data, for example, USB or hard drive.

Transmission is how we transfer data.

Process is how we make operations with data.

Security goals

Confidentiality is not showing data to unauthorized people.

Integrity is not modified data accidentally.

Availability is access to data timely.

Countermeasures

Politics is saving data with rules.

Human factors is training people in Informatics security.

Technology is software or hardware for Informatics security.