ACARA Digital Technologies Years 7–8 Word Scramble: Networks and Cyber Threats (Modules 674–695)
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Word scramble
Unscramble the letters and write each key term on the line.
1
EHRABC RKCHEEC
A website or alert that tells you if your email address appeared in a known data breach, so you can change the password for any affected account.
2
KPBAUC DCOSE
One-time codes that let you log in if you lose your MFA device. Keep them somewhere safe, like printed in a safe place, and never share them. A trusted adult can help with recovery.
3
CPNTREY
To scramble data so nobody can read it without the key. This keeps private things like messages, passwords and bank details safe if someone steals or intercepts them.
4
AWPR NDRAUO
When a shift goes past Z, the count carries on from A, so X shifted by 3 becomes A. The alphabet works like a circle of 26 letters, numbered 0 to 25.
5
THSIF KBAC YB EYK
To decrypt a Caesar ciphertext, move each letter back along the alphabet by the key number to get the plaintext. A wraps back to Z. Then check the result is a real message.
6
RPEIHC HELEW
A tool with two alphabet rings. Turn the inner ring to the key shift so each plaintext letter lines up with its ciphertext letter on the outer ring. ROT13 is a shift of 13.
7
RBTEU OFREC
Trying every possible key, such as all 25 Caesar shifts, until readable text appears. A cipher with so few keys is weak because an attacker can check them all quickly.
8
REUQFYENC SYALISAN
Counting how often each letter appears in ciphertext. The most common letter probably stands for E, so an attacker can work out the key.
Answer Key
ACARA Digital Technologies Years 7–8 · Modules 674–695
1EHRABC RKCHEEC → breach checker — A website or alert that tells you if your email address appeared in a known data breach, so you can change the password for any affected account.
2KPBAUC DCOSE → backup codes — One-time codes that let you log in if you lose your MFA device. Keep them somewhere safe, like printed in a safe place, and never share them. A trusted adult can help with recovery.
3CPNTREY → encrypt — To scramble data so nobody can read it without the key. This keeps private things like messages, passwords and bank details safe if someone steals or intercepts them.
4AWPR NDRAUO → wrap around — When a shift goes past Z, the count carries on from A, so X shifted by 3 becomes A. The alphabet works like a circle of 26 letters, numbered 0 to 25.
5THSIF KBAC YB EYK → shift back by key — To decrypt a Caesar ciphertext, move each letter back along the alphabet by the key number to get the plaintext. A wraps back to Z. Then check the result is a real message.
6RPEIHC HELEW → cipher wheel — A tool with two alphabet rings. Turn the inner ring to the key shift so each plaintext letter lines up with its ciphertext letter on the outer ring. ROT13 is a shift of 13.
7RBTEU OFREC → brute force — Trying every possible key, such as all 25 Caesar shifts, until readable text appears. A cipher with so few keys is weak because an attacker can check them all quickly.
8REUQFYENC SYALISAN → frequency analysis — Counting how often each letter appears in ciphertext. The most common letter probably stands for E, so an attacker can work out the key.