Concept 5
CIA Triad Applications
Applying confidentiality, integrity, and availability to real systems.
The CIA Triad is one of the most important ideas in cybersecurity.
It has 3 parts:
- Confidentiality
- Integrity
- Availability
Security decisions are often based on balancing these three things.
Example 1 — Banking System
Confidentiality
Only customers and bank staff can view account details.
Integrity
Money transfers must be accurate.
Availability
ATMs and online banking should work 24/7.
Example 2 — Hospital System
Confidentiality
Patient records stay private.
Integrity
Medical records must not be changed incorrectly.
Availability
Doctors must access records during emergencies.
Example 3 — School Website
Confidentiality
Student grades are private.
Integrity
Grades should not be altered.
Availability
Students should access the portal during exams.