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7) Cyber Security (Threats, Encryption, Malware)

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📖 Theory – 7) Cyber Security (Threats, Encryption, Malware)

I. Types of Threats
• Malware: virus, worm, trojan, ransomware, spyware.
• Social engineering: phishing, pretexting, baiting.
• Hacking: brute force, DoS attacks, man‑in‑the‑middle.

II. Encryption
• Symmetric and asymmetric encryption.
• Public key, private key, digital signatures.

III. Authentication
• Passwords, biometrics, two‑factor authentication.

IV. Protecting Data
• Firewalls, anti‑malware, access control.

V. Legislation
• Computer Misuse Act, Data Protection Act, GDPR.

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📝 Practice Questions (20)

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Question 1: Define Symmetric encryption.

Question 2: How does Firewall work?

Question 3: Give an example of GDPR.

Question 4: Give an example of Spyware.

Question 5: How does Ransomware work?

Question 6: Explain Asymmetric encryption.

Question 7: How does Phishing work?

Question 8: Why is Private key important in computer science?

Question 9: Why is Authentication important in computer science?

Question 10: Give an example of Ransomware.

Question 11: Give an example of Worm.

Question 12: Explain Brute force.

Question 13: Give an example of Private key.

Question 14: How does Symmetric encryption work?

Question 15: Give an example of Authentication.

Question 16: Define Phishing.

Question 17: How does Private key work?

Question 18: Why is Firewall important in computer science?

Question 19: Explain Biometrics.

Question 20: Define Man-in-the-middle.

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