Week 18 · Network security

Cybersecurity basics: passwords, Wi-Fi security and phishing

You now know how networks, websites and devices work. That also means you can see how they can be attacked. Today is about defence: protecting accounts, Wi-Fi and data — your own and other people's. These habits matter for every job in tech, and for you and your family today.

Networking and security90 minutesIntermediateLevel 2 module

In this lesson you will

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Explain confidentiality, integrity and availability with everyday examples
Recognise phishing messages and common scams, including M-Pesa and WhatsApp scams
Create strong passphrases and explain why systems store password hashes, not passwords
Check a Wi-Fi router's security settings (WPA2/WPA3, admin password, updates)
Follow the law and ethics of security — only test systems you own or have permission to test

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The full lesson is for enrolled students

Enrolled students get the complete notes: essential theory, key terms, a step-by-step practical walkthrough, an independent challenge, check-your-understanding questions and the take-home task.

Cybersecurity basics: passwords, Wi-Fi security and phishing

In this lesson you will

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The full lesson is for enrolled students

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