Guide on Information Hiding for CompTIA Security Plus - Secure System Design Principles

What is Information Hiding?
Information hiding is a principle of secure system design used to reduce vulnerabilities by hiding the internal details of how the system works. This principle makes it more difficult for potential attackers to understand and exploit the system.

Why is it Important?
Information hiding limits the attack surface by exposing only what is necessary for the user, reducing their chance of causing unintended damage or finding vulnerabilities. It also makes it harder for an attacker who has gained initial access to escalate their privileges.

How does it Work?
Information hiding can be achieved through strategies such as encapsulation (packaging code and data together), restricting user privileges, and reducing system complexity.

Exam Tips: Answering Questions on Information Hiding
1. Understand the principle of 'least privilege' as it often goes hand in hand with information hiding.
2. Be aware of examples where information hiding is used, such as encapsulation in object-oriented programming.
3. Remember that information hiding is about reducing the attack surface and making detail harder to discover for attackers.
4. Know the strategies to achieve information hiding such as encapsulation, privilege restriction, and reducing system complexity.
5. In scenario-based questions, think critically about how information hiding could be applied or how its absence could lead to vulnerabilities.