Cybersecurity Basics
Security protects data and systems from attack.
About this topic
Cybersecurity protects computers, networks and data from unauthorised access, damage or theft. A useful model is the CIA triad: confidentiality (only the right people see data), integrity (data is not altered improperly) and availability (systems work when needed). Threats include malware such as viruses, worms, ransomware and spyware, phishing, hacking and denial of service attacks.
Defence uses several layers. Firewalls filter network traffic, antivirus software detects malicious programs, updates fix known vulnerabilities, strong passwords and multi-factor authentication verify identity, encryption protects data, and backups allow recovery. The human element is often the weakest link, as many attacks succeed by tricking people.
For example, ransomware locks files until money is paid, but a recent backup lets victims recover without paying. Good habits include not clicking unknown links, installing updates promptly, using different passwords for each account and being careful on public Wi-Fi. A common misconception is that attackers only target big companies or that Macs and phones are immune. Anyone can be a target, since attacks are often automated. Security is a process, not a product, and defence in depth means no single failure should expose everything.
Key ideas
- Confidentiality, integrity, availability
- Firewalls and antivirus
- Updates fix flaws
Quick check
Use cases: where Cybersecurity Basics helps
- Homework: review the key idea behind Cybersecurity Basics before you start a problem set.
- Exam revision: use the quick check to test whether you can recall Cybersecurity Basics without notes.
- Visual learning: play with the interactive lab to see how Cybersecurity Basics changes when you adjust its inputs.
- Teaching a friend: explain Cybersecurity Basics in your own words, then compare your version with the key ideas.
Computing ideas run phones, search engines, games and the wider internet.
Frequently asked questions
What is Cybersecurity Basics?
Security protects data and systems from attack.
What will I learn in Cybersecurity Basics?
Confidentiality, integrity, availability. Firewalls and antivirus. Updates fix flaws.
Is Cybersecurity Basics part of Computer Science?
Yes. It is one of 80 Computer Science topics on LearnViz HighSchoolEdu, with 3 key ideas, a live animation and a quick check.
Does the Cybersecurity Basics lab work on a phone or tablet?
Yes. The animation resizes to fit your screen and supports touch, so you can drag, tap and slide with your finger.
How should I study Cybersecurity Basics?
Read the summary and key ideas first, play with the interactive lab to see the idea in motion, then answer the quick check. If you get a question wrong, go back to the key idea it tests.
Do I need an account, and is my progress saved?
No account is needed. Marking a topic as learned is saved in your own browser, so it stays on that device and is not sent to a server.