Computing · Stage 6

Cybersecurity: Threats & Encryption

Secondary-Ready · networks — the dangers online (malware, phishing, weak passwords) and how encryption scrambles data so only the right key can read it, plus the habits that keep you protected

✦ Computing📘 Stage 6 · S6⏱ ~14 min🧒 Ages 10–12★ Free to start

I can explain threats and how encryption protects us.

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Kavi's Secret Message

Kavi wanted to send a private note across the forest, but a sneaky magpie kept swooping down to peek at other animals' messages. "If I just send my words out plainly," Kavi worried, "the magpie will read every one — like a postcard anyone can see." So Kavi did something clever. Before sending the note, Kavi scrambled every word with a secret key — the message turned into a jumble of nonsense symbols. The magpie snatched it out of the air, squinted at it… and saw only gibberish. Useless! But Kavi's friend had the matching key, unscrambled the jumble, and read the note perfectly. "That scrambling is called encryption," Kavi hooted. "The sneaky magpie — and viruses, fake messages and snoops — those are the threats. Encryption and a few smart habits are how we stay protected."

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What your child will learn

1Threats: what can go wrong onlineA threat is anything that tries to damage your device, steal your information, or trick you. You can't defend against something you can't name — so meet the main threats first. Tap each one to learn how it works.

2A message anyone can read, or a locked one?Encryption is scrambling a message so that only someone with the right key can turn it back into words. See the difference it makes when a snoop grabs your data on the way. Tap each card.

3How encryption keeps a message safeEncryption is a little program — steps in order. The message starts as plain words, gets locked with a key, travels as nonsense, and is unlocked at the other end. Press ▶ Run and watch who can read what.

4Your everyday shieldNo single thing keeps you safe — good habits work together like layers. Encryption protects your data as it travels; these habits protect your accounts and your device. Tap each one.

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A peek inside

Kavi logs in to a website over open café wifi. A snoop on the same wifi grabs the data as it travels. Because the connection is encrypted, what does the snoop actually see — and why can't they use it?

encryption scrambles the data into nonsense that is useless without the key

Try this at home: Scrambling a message so that only someone with the right key can read it is called ____.

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Start the free interactive lesson, or print the handout for screen-free play.

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Part of Computing · Stage 6 · S6 on KAVI Academy — a secular, whole-child learning platform for ages 5–12.