← Years 5–6 Digital Systems

Passphrase

A password made of several unrelated words that is long but easy to remember. You can add numbers or symbols to make it stronger.

Part of: 5-6 Digital Technologies Vic Curric - Digital Systems & Security — Module 42, 7-8 Digital Technologies Vic Curric - Digital Systems and Security — Module 52, 9-10 Digital Technologies Vic Curric - Digital Systems and Security — Module 27, ACARA Digital Technologies Years 5–6 — Staying Safe Online — Module 8

Understanding Passphrase in Years 5–6 Digital Systems

What it does: Four unrelated words joined together make a long passphrase that is easy to remember but hard to guess. The number 42 and the symbol ! have been added to a group of random words, which makes the passphrase stronger. Numbers and symbols add extra variety, so the passphrase is harder to guess. A passphrase is made of several words, not just one.

Common mistakes: The variable holding the passphrase is called passphrase, not passphrase2. Python would give a NameError. It should be print(passphrase). A for loop line must end with a colon. It should be for w in sentence.split():.

Class: _____________________  ·  Name: _____________________  ·  Date: _________

Free printable worksheet with full answer key — or add this module to a class and your students practise it interactively.

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This module's key terms are also in a printable crossword (Modules 41–52) and word search (Modules 21–52).

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Each concept is reinforced from every angle — learned, then applied, then tested.

Learning
Duo
Which is a passphrase?
purple-tractor-melon-skyPurple1
Matches
Sam2012
↓
This is not a passphrase. It is a short password using a name and a year, which is easy to guess. Use several unrelated words instead.
Applying
Meanings
Term
passphrase
Meaning
A password made of several unrelated words that is long but easy to remember. You can add numbers or symbols to make it stronger.
Practice
Passphrase: purple-tiger-bicycle-cloud-47!
Testing
Gaps
= "purple-tiger-cloud-boat"
Check Answer
Spots
3passphrase += "42"
4print(passphrase2)

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Quick Questions

1. Which is a passphrase?
A. Purple1
B. purple-tractor-melon-sky ✓
A passphrase joins several unrelated words, which makes it long but easy to remember.
2. What makes a passphrase strong?
A. It is short and uses one common word
B. It is long and uses several unrelated words ✓
Length and unrelated words make a passphrase hard to guess.
3. Which words make the best passphrase?
A. Random words that do not belong together ✓
B. Words from your name and birthday
Unrelated words are hard for others to guess. Personal details are easy to find out.
4. How can you make a passphrase even stronger?
A. Add numbers or symbols ✓
B. Make it shorter
Numbers and symbols add extra variety, so the passphrase is harder to guess.
5. A passphrase can be built from a memorable sentence. Which is a true example?
A. The sentence 'My cat eats 3 green apples' becomes Mycat3greenapples ✓
B. The sentence 'My cat eats 3 green apples' becomes 123
Taking the words from a sentence gives a long passphrase you can still remember.

Match the Pairs

purple-Teapot-runs-87 → A passphrase that combines random, unrelated words and adds numbers and a symbol to make it stronger
Myd0gEats2Pies! → A passphrase built from a memorable sentence, using the first letters or words plus numbers and a symbol
A passphrase is made by combining several random, unrelated words → cloud-banana-rocket-pencil
You can make a passphrase stronger by adding numbers or symbols → frog-lamp-ocean-42!
Sam2012 → This is not a passphrase. It is a short password using a name and a year, which is easy to guess. Use several unrelated words instead.
my-name-is-sam-and-i-like-cats → The words are related and form a personal sentence that is easy to guess. Use unrelated words instead, such as from your own memorable sentence.

Key Term

passphrase
A password made of several unrelated words that is long but easy to remember. You can add numbers or symbols to make it stronger.

Fill in the Blanks

1. passphrase = "purple-tiger-cloud-boat"
Hint: Type the variable name for a password made of several unrelated words that is long but easy to remember
2. passphrase = word1 + word2 + word3
Hint: Type the operator that joins the random words together into one long passphrase
3. words = "blue-frog-tree" passphrase = words + number + symbol
Hint: Type the variable name for the digits that are added to make the passphrase stronger
4. sentence = "My dog likes red apples" passphrase = sentence.replace(" ", "-")
Hint: Type the method name that swaps the spaces in a memorable sentence for dashes
5. passphrase = "purple-tiger-cloud-boat" if len(passphrase) >= 16: print("Long and strong")
Hint: Type the comparison operator that checks the passphrase is at least a certain length

Spot the Error

Question 1
A words = ["frog","lamp","tea"]
B passphrase = "".join(words)
C passphrase += "42"
D print(passphrase2)
Line D — The variable holding the passphrase is called passphrase, not passphrase2. Python would give a NameError. It should be print(passphrase).
Question 2
A sentence = "I eat 3 red pies"
B letters = ""
C for w in sentence.split()
D letters += w[0]
E print(letters)
Line C — A for loop line must end with a colon. It should be for w in sentence.split():
Question 3
A import random
B words = ["moon","tree","bus"
C pick = random.sample(words,3)
D passphrase = "-".join(pick)
E print(passphrase)
Line B — The list of random words is missing its closing square bracket. It should end with ].
Question 4
A passphrase == "pig-rain-kite"
B if len(passphrase) >= 12:
C print("Long enough")
D else:
E print("Add more words")
Line A — A single = stores the passphrase in a variable. == only compares values, so passphrase would not exist. It should be passphrase = "pig-rain-kite".
Question 5
A words = ["pen","sky","fox"]
B passphrase = " ".join(words)
C passphrase = passphrase + 7
D print(passphrase)
Line C — Numbers and symbols added to a passphrase must be text. 7 is not in quotes, so Python cannot add it to a string. It should be + "7!" or + "7".

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