Cybersecurity CS Thinking Example 2
Follow the full solution, then compare it with the other examples linked below.
Example 2
mediumExplain three methods of protecting against cyber attacks: encryption, authentication, and firewalls.
Solution
- 1 Step 1: Encryption scrambles data so only authorised parties with the correct key can read it. Even if data is intercepted, it is unreadable without the key.
- 2 Step 2: Authentication verifies user identity before granting access. Methods: passwords, two-factor authentication (2FA), biometrics (fingerprint, face recognition).
- 3 Step 3: Firewalls monitor and filter network traffic, blocking unauthorised connections. They act as a barrier between a trusted internal network and untrusted external networks.
Answer
Encryption (scrambles data), Authentication (verifies identity), Firewalls (filter network traffic). Multiple layers of defence are needed.
Defence in depth — using multiple security measures — is a core cybersecurity principle. No single measure is sufficient; security relies on layers working together.
About Cybersecurity
The practice of protecting computing systems, networks, and data from unauthorized access, attacks, and damage. Cybersecurity encompasses three core goals: confidentiality (only authorized users can access data), integrity (data is not tampered with), and availability (systems remain operational).
Learn more about Cybersecurity →More Cybersecurity Examples
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