What you'll learn
How systems are attacked and protected.
Key ideas
- Threats: malware, phishing and worms.
- Protection: encryption, firewalls and strong passwords.
- Penetration testing finds weaknesses; two-factor authentication adds security.
Exam tips
- Match a threat to a suitable defence.
- Explain how encryption protects data.
Common mistakes
- Confusing malware types.
- Treating encryption as the same as compression.